WO2023240704A1 - 半导体结构及其形成方法 - Google Patents
半导体结构及其形成方法 Download PDFInfo
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- WO2023240704A1 WO2023240704A1 PCT/CN2022/103007 CN2022103007W WO2023240704A1 WO 2023240704 A1 WO2023240704 A1 WO 2023240704A1 CN 2022103007 W CN2022103007 W CN 2022103007W WO 2023240704 A1 WO2023240704 A1 WO 2023240704A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D1/00—Resistors, capacitors or inductors
- H10D1/60—Capacitors
- H10D1/68—Capacitors having no potential barriers
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- H—ELECTRICITY
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- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
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Definitions
- the present disclosure relates to the field of semiconductor technology, and relates to but is not limited to a semiconductor structure and a method of forming the same.
- DRAM Dynamic Random Access Memory
- the transistors are horizontal and the capacitors are perpendicular to the transistors.
- the integration level of DRAM continues to increase and the size continues to shrink.
- the aspect ratio of the capacitors is getting larger and larger, and the size of the transistors is getting larger and larger. The smaller the size, the process complexity and manufacturing cost of DRAM gradually increase.
- embodiments of the present disclosure provide a semiconductor structure and a method of forming the same.
- embodiments of the present disclosure provide a method for forming a semiconductor structure, including:
- a substrate is provided; the substrate includes a first isolation groove extending along a first direction, and a plurality of active pillars arranged in an array along the first direction and a third direction; wherein the first isolation groove is in The base is divided into a first area and a second area in the second direction; the active column is supported by a support structure; the first direction, the second direction and the third direction are perpendicular to each other, The first direction and the second direction are parallel to the upper surface of the substrate;
- a semi-capacitive structure located in the first region and a full-surround gate structure located in the second region are formed;
- a first connection structure connecting the full-surround gate structure and the capacitor structure is formed in the first isolation groove.
- inventions of the present disclosure provide a semiconductor structure, which is formed by the above-mentioned method for forming a semiconductor structure.
- the semiconductor structure includes:
- a substrate includes a first region and a second region arranged along a second direction; the second region includes active pillars arranged in an array along a first direction and a third direction; wherein, the first direction , the second direction and the third direction are perpendicular to each other, and the first direction and the second direction are parallel to the upper surface of the substrate;
- a capacitor structure located in the first region, and a full-surround gate structure located in the second region; wherein the full-surround gate structure surrounds the surface of the active pillar;
- a support structure that supports the capacitor structure and the full-surround gate structure.
- the horizontal capacitor structure can reduce the possibility of tipping or breaking, thereby improving the capacitance structure.
- the stability of the structure, and the stacked structure formed by stacking multiple capacitor structures in the third direction can form a three-dimensional semiconductor structure, thereby improving the integration of the semiconductor structure and achieving shrinkage.
- Figure 1 is a schematic flowchart of a semiconductor structure forming method provided by an embodiment of the present disclosure
- FIGS 2a to 2n and Figures 3a to 3m are schematic structural diagrams of the semiconductor structure formation process provided by embodiments of the present disclosure
- Figure 4 is a cross-sectional view of a semiconductor structure provided by an embodiment of the present disclosure.
- the three directions may include the X-axis, Y-axis, and Z-axis directions.
- the substrate may include a top surface on the front side and a bottom surface on the back side opposite to the front side; when flatness of the top surface and the bottom surface is ignored, a direction perpendicular to the top surface and the bottom surface of the substrate is defined as a third direction.
- two directions that intersect each other are defined.
- the direction in which the first isolation groove extends can be defined as the first direction
- the third isolation direction can be defined.
- the extending direction of the groove is the second direction
- the planar direction of the semiconductor substrate can be determined based on the first direction and the second direction.
- the first direction, the second direction and the third direction are perpendicular to each other.
- the first direction is defined as the X-axis direction
- the second direction is defined as the Y-axis direction
- the third direction is defined as the Z-axis direction.
- FIG. 1 is a schematic flowchart of a method for forming a semiconductor structure provided by an embodiment of the disclosure. As shown in Figure 1, the method for forming a semiconductor structure includes the following steps:
- Step S101 providing a substrate; the substrate includes a first isolation groove extending along a first direction, and a plurality of active pillars arranged in an array along the first direction and a third direction; wherein, the first isolation groove extends in the second direction
- the base is divided into a first area and a second area; the active column is supported by a support structure.
- the substrate at least includes a semiconductor substrate.
- the semiconductor substrate may be a silicon substrate.
- the semiconductor substrate may also include other semiconductor elements, such as germanium (Ge), or semiconductor compounds, such as silicon carbide (SiC). ), gallium arsenide (GaAs), gallium phosphide (GaP), indium phosphide (InP), indium arsenide (InAs) or indium antimonide (InSb), or other semiconductor alloys, such as silicon germanium (SiGe) , gallium arsenide phosphide (GaAsP), aluminum indium arsenide (AlInAs), aluminum gallium arsenide (AlGaAs), indium gallium arsenide (GaInAs), indium gallium phosphide (GaInP), and/or indium gallium arsenide phosphide ( GaInAsP) or a combination thereof.
- germanium germanium
- GaAs gallium ar
- the first isolation groove divides the substrate into a first region and a second region in the second direction.
- the first region and the second region can be used to form different functional structures respectively, for example, the first region It can be used to form a capacitor structure, and the second region can be used to form a full gate-all-around structure, a bit line structure and a stepped word line structure.
- the substrate includes a plurality of active pillars and a support structure arranged in an array along the first direction and the third direction.
- the plurality of active pillars are supported by the support structure, and each active pillar is used to form a transistor.
- the support structure extends along the first direction and the third direction, and the support structure may be located on the surface of the semiconductor substrate, or may extend into the interior of the semiconductor substrate to achieve a better support effect.
- the active pillar may be a square prism (for example, a four-sided prism, a six-sided prism, or an eight-sided prism) or a cylinder.
- Step S102 Form a semi-capacitive structure located in the first region and a full gate-all-around structure located in the second region in the gap between the active pillars.
- the first region is used to form a capacitor structure
- the second region is used to form a full-surround gate structure.
- the semi-capacitive structure is an incomplete capacitive structure, but a part of the capacitive structure.
- a capacitive structure including only one electrode layer or a capacitive structure including only a dielectric layer and an electrode layer.
- the full-circle gate structure formed has a wide channel region, which can reduce the short channel effect and improve the control capability of the gate, thereby improving the performance of the formed semiconductor structure.
- Step S103 Process the active pillar and semi-capacitive structure in the first area to form a capacitive structure extending along the second direction.
- an electrode layer can be formed in the first region, or a dielectric layer and an electrode layer can be formed in the first region to transform the semi-capacitive structure into Complete capacitor structure.
- the capacitor structures formed are arranged at intervals along the first direction and the third direction and extend along the second direction. That is to say, the capacitor structures formed in the embodiment of the present disclosure are arranged horizontally.
- the capacitor structure can reduce the possibility of tipping or breaking, thereby improving the stability of the capacitor structure.
- Step S104 Form a first connection structure connecting the full-surround gate structure and the capacitor structure in the first isolation groove.
- wires can be grown on the channel surface in the full-circle gate structure through epitaxial technology as the first connection structure; the first connection structure extends along the second direction and is electrically connected to the electrode layer of the capacitor structure.
- a first isolation groove extending along a first direction and a plurality of active pillars arranged in an array along the first direction and a third direction are formed on the substrate.
- the first isolation groove can The substrate is divided into a first region and a second region in the first direction to realize the preparation of different functional devices in different regions; secondly, in the gaps between the active pillars, a semi-capacitive structure located in the first region and A full-surround gate structure located in the second area; again, the active pillars and the semi-capacitive structure in the first area are processed to form a capacitive structure extending along the second direction, and the capacitive structure includes a semi-capacitive structure; finally, in the first isolation groove A first connection structure connecting the full-circle gate structure and the capacitor structure is formed.
- the preparation process of the semiconductor structure can be simplified and the manufacturing cost of the semiconductor structure can be reduced.
- the capacitor structure in the embodiment of the present disclosure extends along the second direction, that is, the capacitor structure in the embodiment of the present disclosure is horizontal, compared with the vertical capacitor structure with a high aspect ratio, the horizontal capacitor structure can reduce the risk of tipping or The possibility of breaking can improve the stability of the capacitor structure, and the stacked structure formed by stacking multiple capacitor structures in the third direction can form a three-dimensional semiconductor structure, thereby improving the integration of the semiconductor structure and achieving shrinkage.
- Figures 2a to 2n and Figures 3a to 3m are structural schematic diagrams of the semiconductor structure formation process provided by embodiments of the present disclosure.
- Figure 2a is a three-dimensional structural schematic diagram
- Figure 2b is a laminated structure in Figure 2a along a-a' and b-b'
- Figures 2c to 2n and Figures 3a to 3m in the subsequent formation process are shown from the cross-sectional perspective of a-a' and b-b'.
- the formation process of the semiconductor structure provided by the embodiment of the present disclosure will be described in detail below with reference to Figures 2a to 2n and Figures 3a to 3m.
- step S101 is performed to provide a substrate; the substrate includes a first isolation groove 12 extending along a first direction, and a plurality of active pillars 110 arranged in an array along the first direction and the third direction. ; Wherein, the first isolation groove 12 divides the substrate into a first area A and a second area B in the second direction; the active pillar 110 is supported by the support structure 14 .
- the substrate may be formed by the following steps: providing a semiconductor substrate 10, forming a stacked structure 11 on the semiconductor substrate 10, the stacked structure 11 including alternately stacked first semiconductor layers 111 and second semiconductor layers 112 ; Etch the stacked structure 11 to form the first isolation groove 12 ; Remove the first semiconductor layer 111 in the stacked structure 11 .
- first semiconductor layer 111 may be germanium, silicon germanide, or silicon carbide; it may also be silicon-on-insulator (SOI) or germanium-on-insulator (GOI).
- SOI silicon-on-insulator
- GOI germanium-on-insulator
- the second semiconductor layer 112 may be a silicon layer, or may include other semiconductor elements, such as germanium, or semiconductor compounds, such as silicon carbide, gallium arsenide, gallium indium phosphide, indium arsenide or indium antimonide, Or include other semiconductor alloys, such as: silicon germanium, gallium arsenide phosphide, aluminum indium arsenide, aluminum gallium arsenide, indium gallium arsenide, indium gallium phosphide, and/or indium gallium arsenide phosphide or combinations thereof.
- the first semiconductor layer 111 because the first semiconductor layer 111 needs to be etched away later, the second semiconductor layer 112 remains. Therefore, the first semiconductor layer 111 has a high etching selectivity ratio relative to the second semiconductor layer 112, that is, under the same Under etching conditions, the first semiconductor layer 111 is easier to be removed by etching than the second semiconductor layer 112 .
- the first semiconductor layer 111 may be a silicon germanium layer
- the second semiconductor layer 112 may be a silicon layer.
- the first semiconductor layer 111 and the second semiconductor layer 112 may be formed through an epitaxial process.
- the first semiconductor layer 111 and the second semiconductor layer 112 are alternately stacked to form a semiconductor superlattice.
- the thickness of each semiconductor layer ranges from a few atoms to dozens of atomic layers.
- the main semiconductor properties of each layer are such as band gap and Doping levels can be controlled independently.
- the number of layers of the first semiconductor layer 111 and the second semiconductor layer 112 in the stacked structure 11 can be set according to the required capacitance density (or storage density). The greater the number of layers of the first semiconductor layer 111 and the second semiconductor layer 112, the higher the number of layers.
- the formed three-dimensional memory has higher integration and greater capacitance density.
- the number of the first semiconductor layer 111 and the second semiconductor layer 112 may be 2 to 2000 layers.
- the method of forming the semiconductor structure before forming the first isolation trench 12 , further includes: etching the stacked structure 11 and part of the semiconductor substrate 10 to form a third isolation trench 13 .
- the third isolation groove 13 can be formed by the following steps: first, a first mask layer 151 , a first anti-reflection layer 311 and a pattern with a specific pattern H are sequentially formed on the surface of the stacked structure 11 .
- first photoresist layer 161 secondly, sequentially etching the first anti-reflective layer 311 and the first mask layer 151 through the first photoresist layer 161 to transfer the specific pattern H to the first mask layer 151;
- the stacked structure 11 and part of the semiconductor substrate 10 are etched through the first mask layer with a specific pattern H to form a third isolation groove 13.
- the bottom of the third isolation groove 13 is formed. Located in the semiconductor substrate 10 , in other embodiments, the third isolation groove 13 may not extend into the semiconductor substrate 10 , but only be located in the stacked structure 11 .
- the first anti-reflective layer 311 is used to absorb the reflected light on the surface of the stacked structure 11 to avoid interference between the reflected light and the incident light;
- the material of the first anti-reflective layer 311 can be silicon oxynitride or spin coating. carbon layer.
- the material used for the first mask layer 151 may be one or more of silicon oxide, silicon nitride, silicon carbide, and silicon oxynitride. Both the first mask layer 151 and the first anti-reflection layer 311 can be formed by any suitable deposition process.
- the third isolation groove 13 divides the second area B into a first part B-1 and a second part B-2 in the first direction; wherein the first part B-1 can be used to form a full ring
- the gate structure, the second portion B-2 may be used to form a stepped word line structure.
- the method of forming the semiconductor structure further includes: removing the first photoresist layer 161 , the first anti-reflection layer 311 and the first mask layer 151 .
- dry etching technology such as plasma etching technology, reactive ion etching technology or ion milling technology
- wet etching technology can be used to remove the first photoresist layer 161 and the first anti-reflective layer 311 and the first mask layer 151, exposing the surface of the stacked structure 11 (as shown in Figure 2d).
- Figure 2e is a top view of the first area.
- the method of the semiconductor structure further includes: etching the stacked structure to A fifth isolation groove 31 extending along the second direction is formed, and the fifth isolation groove 31 divides the second semiconductor layer 112 into a plurality of active pillars 110 arranged along the first direction; in the fifth isolation groove 31 An isolation structure 311 is formed therein.
- the material forming the isolation structure 311 may be silicon oxide, silicon nitride or silicon oxynitride.
- the isolation structure 311 is used to fill the gaps between adjacent active pillars 110 to facilitate subsequent formation of other structures between the active pillars 110 and the isolation structure 311 .
- the method of forming the semiconductor structure further includes: etching and removing part of the isolation structure 311 and part of the first semiconductor layer 111 to form a plurality of The etching hole 141 extends along the first direction; the etching hole 141 exposes the active pillar 110 , and a supporting material is filled in the etching hole 141 to form a supporting structure 14 surrounding the active pillar 110 .
- the support structure 14 can be formed through the following steps: first, sequentially forming a second mask layer 152, a second anti-reflection layer 312 and a special layer on the surface of the stacked structure 11.
- the second photoresist layer 162 of the pattern I is first, sequentially forming a second mask layer 152, a second anti-reflection layer 312 and a special layer on the surface of the stacked structure 11.
- the specific pattern I can be a plurality of openings extending along the X-axis direction; secondly, the second anti-reflection layer 312 and the second mask are sequentially etched through the second photoresist layer 162 layer 152 to transfer the specific pattern I to the second mask layer 152; again, part of the isolation structure 311 and part of the first semiconductor layer 111 are removed by etching through the second mask layer with the specific pattern I, forming a plurality of layers along the Etching holes 141 extending in the axial direction; finally, supporting material is filled in the etching holes 141 to form a supporting structure 14 surrounding the active pillar 110 .
- the material used for the second mask layer 152 may be one or more of silicon oxide, silicon nitride, silicon carbide, and silicon oxynitride; the material used for the second anti-reflective layer 312 may be silicon oxynitride or spin-on carbon;
- the support material can be silicon nitride or silicon carbonitride.
- the support structure 14 can also extend into the semiconductor substrate 10 to achieve a more stable support effect.
- the support structure 14 can be used to support the active pillars 110, and subsequently a capacitor structure and a full-surround gate structure will be formed between adjacent active pillars 110. Therefore, the support structure 14 can also be used to support the capacitor. structure and a full all-around gate structure, thereby improving the stability of the formed semiconductor structure.
- the method of forming the semiconductor structure further includes: removing the second photoresist layer 162 , the second anti-reflection layer 312 and the second mask layer 152 .
- dry etching technology or wet etching technology can be used to remove the second photoresist layer 162, the second anti-reflection layer 312 and the second mask layer 152, exposing the surface of the stacked structure 11 (as shown in the figure) shown in 2h).
- the first isolation groove 12 can be formed by the following steps: first, a third mask layer 153 and a third photoresist layer 163 with a specific pattern C are sequentially formed on the surface of the stacked structure 11 , the specific pattern C may be an opening extending along the X-axis direction, and the projection of the specific pattern C on the semiconductor substrate 10 is adjacent to one of the projections of the specific pattern I on the semiconductor substrate 10 in the Y-axis direction. Secondly, the third mask layer 153 is etched through the third photoresist layer 163 to transfer the specific pattern C into the third mask layer 153, and the stacked structure is etched through the third mask layer having the specific pattern C. 11 and the isolation structure 311 to form a first isolation groove 12, and the first isolation groove 12 exposes the adjacent support structure 14. In the embodiment of the present disclosure, the first isolation groove 12 extends into the semiconductor substrate 10 to achieve better isolation effect.
- the first isolation groove 12 divides the substrate into a first region A and a second region B in the Y-axis direction; wherein the first region A is used to form a capacitor structure, and the second region B is used to form a capacitor structure.
- the first isolation groove 12 may also be located only on the surface of the semiconductor substrate 10 .
- the method of forming the semiconductor structure further includes: removing the third mask layer 153 and the third photoresist layer 163 .
- dry etching technology or wet etching technology may be used to remove the third mask layer 153 and the third photoresist layer 163 .
- the method of forming the semiconductor structure further includes: filling the first isolation groove 12 with a sacrificial material to form a sacrificial layer 121 .
- the sacrificial layer 121 may be silicon oxynitride.
- the sacrificial layer 121 is used to protect the cross-section of the second semiconductor layer 112 from damage when the first semiconductor layer 111 is subsequently removed, so as to facilitate the subsequent epitaxial formation of a cross-section of the second semiconductor layer 112 connecting the full gate structure and the stepped word line structure. connection structure.
- the first semiconductor layer 111 in the stacked structure 11 is removed.
- the first semiconductor layer 111 in the stacked structure 11 can be removed by wet etching (for example, using strong acid etching such as concentrated sulfuric acid, hydrofluoric acid, concentrated nitric acid, etc.) or dry etching technology.
- the first semiconductor layer 111 has a high etching selectivity ratio relative to the second semiconductor layer 112, so that the second semiconductor layer 112 may not be damaged when the first semiconductor layer 111 is removed.
- the method of forming the semiconductor structure further includes: removing the sacrificial layer 121, the protective layer 131 and the isolation structure 311.
- the method of forming the semiconductor structure further includes thinning the active pillar 110 .
- the active pillars 110 are thinned so that the gap between two adjacent active pillars 110 becomes larger.
- the effective area of the capacitor structure can be increased, thereby increasing the capacity of the capacitor structure.
- more space can be reserved for the subsequent formation of the capacitor structure and the full gate structure, which reduces the complexity of the process.
- the active pillar 110 can be thinned in the following two ways:
- Method 1 Directly dry-etch the active pillar 110 until the required thickness is formed, and then stop etching.
- Method two oxidize the active pillar 110 in situ, oxidize part of the active pillar 110 into a silicon oxide layer, and remove the silicon oxide layer through wet etching or dry etching technology.
- the active pillar 110 may not be thinned.
- step S102 is performed to form the A half-capacitor structure 18 located in the first region and the full-surround gate structure 17 located in the second region B in the gap between the active pillars 110.
- the semi-capacitive structure 18 and the full gate structure 17 may be formed by the following steps: sequentially forming a dielectric layer 171 and a first metal layer 173 on the surfaces of the active pillars 110 in the first region A and the second region B. .
- the dielectric layer 171 may be one layer or multiple layers.
- the dielectric layer 171 in the embodiment of the present disclosure includes a first dielectric layer 1711 and a second dielectric layer 1712.
- the material of the first dielectric layer 1711 may be silicon oxide or other suitable materials;
- the material of the second dielectric layer 1712 may be a high-K material, such as lanthanum oxide, aluminum oxide, hafnium oxide, hafnium oxynitride, or niobium oxide. , hafnium silicate or zirconium oxide, or any combination thereof;
- the material of the first metal layer can be any material with good electrical conductivity, such as titanium nitride.
- the second dielectric layer 1712 when the second dielectric layer 1712 can serve as the dielectric layer of the capacitive structure, the second dielectric layer 1712 and the first metal layer 173 located in the first region A constitute the semi-capacitive structure 18 .
- the semi-capacitive structure 18 when the second dielectric layer 1712 cannot serve as the dielectric layer of the capacitive structure, the semi-capacitive structure 18 includes the first metal layer 173 .
- the first dielectric layer 1711 , the second dielectric layer 1712 and the first metal layer 173 located in the second region B form the full gate-all-around structure 17 .
- the first dielectric layer 1711, the second dielectric layer 1712 and the first metal layer 173 can be formed by any of the following deposition processes, such as chemical vapor deposition (Chemical Vapor Deposition, CVD) process, physical vapor deposition ( Physical Vapor Deposition (PVD) process, Atomic Layer Deposition (ALD) process, spin coating process, coating process or thin film process, etc.
- CVD chemical Vapor Deposition
- PVD Physical Vapor Deposition
- ALD Atomic Layer Deposition
- spin coating process coating process or thin film process, etc.
- the first metal layer 173 located in the first region A constitutes the lower electrode layer of the capacitor structure; the dielectric layer 171 and the first metal layer 173 located in the second region respectively constitute the gate of the full ring gate structure 17 dielectric layer and gate metal layer. Since the full-all-around gate structure 17 and the lower electrode layer of the capacitor structure are formed at the same time in the embodiment of the present disclosure, the manufacturing process of the semiconductor structure can be simplified and the manufacturing cost of the semiconductor structure can be reduced.
- the full-circle gate structure 17 has a wide channel region, which can reduce the short channel effect and improve the gate control capability, thereby improving the performance of the formed semiconductor structure.
- the dielectric layer 171 and the first metal layer 173 are also formed on the inner walls of the first isolation groove 12 and the third isolation groove 13 .
- the method of forming the semiconductor structure further includes: filling the first isolation material in the gap between the surface of the first metal layer 173 and the first metal layer 173 to form a third An isolation layer 19.
- the first isolation layer 19 can be used to isolate the adjacent first metal layer 173 to prevent the first metal layer 173 from leaking electricity.
- the first isolation material may be silicon oxide, silicon nitride, silicon oxynitride, or other suitable materials.
- step S103 is performed to process the active pillar 110 and the semi-capacitive structure in the first region A to form the capacitive structure 20 extending along the second direction.
- step S103 can be formed by the following steps: as shown in Figures 3a to 3c, forming a layer extending along the X-axis direction in the first region A.
- the first opening 21 of A second metal material is deposited in the opening 21 and the first gap 22 to form a second metal layer 174 .
- step S103 can also be formed by the following steps: forming a first opening 21 extending along the X-axis direction in the first region A; An opening 21 exposes the semiconductor substrate 10; through the first opening 21, the active pillar 110 and the dielectric layer 171 in the first region A are removed to form a first gap 22; in the first opening 21 and the first gap 22 in sequence The dielectric material and the second metal material are deposited to form dielectric layer 172 and second metal layer 174. At this time, the second metal layer 174 forms the upper electrode of the capacitor structure 20 , and the first metal layer 173 , the dielectric layer 172 and the second metal layer 174 located in the first region A form the capacitor structure 20 .
- the first opening 21 may be formed by the following steps: forming a fourth photoresist layer 164 with a specific pattern D on the surface of the first isolation layer 19 , at this time, the An isolation layer 19 can be used as a mask layer to form the first opening 21, and the first isolation layer 19 is etched through the fourth photoresist layer 164 to transfer a specific pattern D into the first isolation layer 19, by having a specific pattern.
- the first isolation layer 19 of D is etched into the stacked structure 11 until the semiconductor substrate 10 is exposed and a first opening 21 is formed.
- the dielectric layer material may be a high-K dielectric, such as lanthanum oxide (La 2 O 3 ), aluminum oxide (Al 2 O 3 ), hafnium oxide (HfO 2 ), hafnium oxynitride (HfON), One or any combination of niobium oxide (NbO), hafnium silicate (HfSiO x ) or zirconium oxide (ZrO 2 ).
- the second metal material may include titanium, tungsten, molybdenum, metal nitride or metal suicide. The dielectric material and the second metal material can be formed by any deposition process.
- step S104 a first connection structure 23 connecting the full-surround gate structure 17 and the capacitor structure 20 is formed in the first isolation groove 12 .
- the first connection structure 23 may be formed by the following steps: removing the first isolation layer 19 located in the first isolation groove 12 , and removing the side walls of the second region B located in the first isolation groove 12 .
- the dielectric layer 171 and the first metal layer 173 form a second isolation groove 12a extending along the first direction; wherein the second isolation groove 12a exposes the active pillar 110 in the second area B and the A side of the first area.
- the first metal layer 173 of the wall; the first connection structure 23 is epitaxially grown on the surface of the exposed active pillar 110; wherein the first connection structure 23 is in contact with the first metal layer 173 in the first region.
- the first connection structure 23 can be formed by the following steps: forming a fifth photoresist layer 165 with a specific pattern E on the surface of the first isolation layer 19.
- the first isolation layer 19 can As a mask layer for forming the second isolation groove 12a, the first isolation layer 19 is etched through the fifth photoresist layer 165 to transfer the specific pattern E into the first isolation layer 19.
- An isolation layer is etched to remove the first isolation layer 19, dielectric layer 171, and first metal layer 173 located in the first isolation groove 12, forming a second isolation groove 12a extending along the X-axis direction; the second isolation groove The groove 12a exposes the active pillar 110 in the second area B and the first metal layer 173 on the sidewall of the first area A; the first semiconductor material is epitaxially grown on the surface of the exposed active pillar 110 to form a first connection structure. 23; The first connection structure 23 is in contact with the first metal layer 173 in the first area A.
- the first connection structure 23 may be a heteroepitaxial layer. Therefore, the first semiconductor material may be silicon germanium, and the content of germanium in the silicon germanium may be 5% to 50%; the thickness of the first connection structure 23 for
- epitaxial growth may be vapor phase epitaxy, liquid phase epitaxy, molecular beam epitaxy or metal organic chemical vapor deposition. Utilizing the selectivity of the epitaxial growth process, the self-aligned connection of the all-around gate structure 17 and the capacitor structure 20 can be achieved.
- the method of forming the semiconductor structure further includes: filling the second isolation groove 12a and the gap between the first connection structure 23 with a second isolation material to form The second isolation layer 24; wherein, the surface of the second isolation layer 24 is flush with the surface of the first isolation layer 19.
- the second isolation layer 24 can be used to isolate adjacent first connection structures 23 .
- the material of the second isolation layer 24 may be silicon oxide, silicon nitride, silicon oxynitride or other suitable materials.
- the method of forming the semiconductor structure further includes: forming a bit line structure 25 and a stepped word line structure 26 connected to the full gate structure 17. .
- the bit line structure 25 is formed by the following steps: etching one end of the active pillar 110 away from the capacitor structure 20 to form a bit line trench extending along the first direction; the bit line trench exposes the second area. Semiconductor substrate 10; fill the bit line trenches with bit line metal material to form a bit line structure 25.
- a sixth photoresist layer 166 with a specific pattern F is formed on the surface of the first isolation layer 19.
- the first isolation layer 19 and the second isolation layer 24 can be used to form bit line trenches.
- the mask layer of the groove is used to etch the first isolation layer 19 through the sixth photoresist layer 166, transfer the specific pattern E into the first isolation layer 19, and etch the active layer through the first isolation layer 19 with the specific pattern F.
- One end of the pillar 110 away from the capacitor structure 20 forms a bit line trench (not shown) extending along the X-axis direction; the bit line trench exposes the semiconductor substrate 10 in the second region B; filling the bit line trench with bits line metal material to form a bit line structure 25.
- the bit line metal material includes: tungsten (W), cobalt (Co), copper (Cu), aluminum (Al), titanium nitride (TiN), titanium-containing metal layer, polysilicon, or any combination thereof.
- the relationship between the bit line structure 25 , the full gate structure 17 and the support structure 14 may include the following two situations: first, the support structure 14 is located in the middle of the full gate structure 17 , and the full gate structure 17 It is in contact with the bit line structure 25, as shown in Figure 3h; second, the support structure 14 is located at one end of the full gate structure 14 away from the capacitor structure (that is, located at the rightmost end of the full gate structure 17). At this time, the support structure and the bit line structure 25 contact, the bit line structure 25 and the full gate structure 17 are separated by the support structure 14 .
- the method of forming the semiconductor structure before forming the stepped word line structure 26, the method of forming the semiconductor structure further includes: removing the first isolation layer 19, the dielectric layer 171 and the first metal layer 173 located in the third isolation groove 13, A fourth isolation groove 13a extending along the second direction is formed; wherein the fourth isolation groove 13a exposes a first portion of the first metal layer 173 and a second portion of the active pillar 110; in the fourth isolation groove 13a A second connection structure 27 is formed that connects the second part and the full surround gate structure 17 .
- the fourth isolation groove 13a can be formed by the following steps: forming a seventh photoresist layer 167 with a specific pattern G on the surface of the first isolation layer 19, at this time, The first isolation layer 19 and the second isolation layer 24 may be used as a mask layer to form the fourth isolation groove 13a, and the first isolation layer 19 is etched through the seventh photoresist layer 167 to transfer the specific pattern G to the first isolation layer 13a.
- the first isolation layer 19 located in the third isolation groove 13 is etched to remove the first isolation layer 19 located in the third isolation groove 13, and the second portion B-2 located in the third isolation groove 13 is removed by etching.
- the dielectric layer 171 and the first metal layer 173 of the sidewall form a fourth isolation groove 13a extending along the Y-axis direction; wherein the fourth isolation groove 13a exposes the first metal layer of the sidewall of the first part B-1 173 and the active column 110 of the second part B-2.
- the fourth isolation groove 13a is used to form the second connection structure 27 connecting the second part B-2 and the full surround gate structure 17.
- the second connection structure 27 is formed by the following steps: epitaxially growing a second semiconductor material on the surface of the exposed active pillar 110 of the second portion B-2 to form the second connection structure 27; wherein, The two connection structures 27 are in contact with the first metal layer 173 in the first part B-1.
- the second connection structure 27 may be a homoepitaxial layer, therefore, the second semiconductor material may be silicon; the thickness of the second connection structure 27 is
- epitaxial growth may be vapor phase epitaxy, liquid phase epitaxy, molecular beam epitaxy or metal organic chemical vapor deposition.
- the method of forming the semiconductor structure further includes: forming an insulating dielectric layer 175 on the surface of the second connection structure 27; wherein, the insulating dielectric layer 175 The surface is flush with the surface of the dielectric layer 171; a third metal layer 176 is formed on the surface of the insulating dielectric layer 175, and the surface of the third metal layer 176 is flush with the surface of the first metal layer 173; on the surface of the third metal layer 176 The gap between the third metal layer 176 and the third isolation layer 176 is filled with the third isolation material to form the third isolation layer 28 , where the surface of the third isolation layer 28 is flush with the surface of the first isolation layer 19 .
- the material of the insulating dielectric layer 175 may be silicon oxide, silicon nitride, or silicon oxynitride, such as silicon oxide.
- the third isolation layer 28 can be used to isolate the adjacent third metal layer 176 to prevent the third metal layer 176 from leaking; the material of the third isolation layer 28 can be silicon oxide, silicon nitride, silicon oxynitride or other suitable materials. .
- the material of the third metal layer 176 can be any material with good electrical conductivity, such as tungsten.
- the third isolation groove 13 divides the full-surround gate structure 17 into a first part B-1 and a second part B-2 in the X-axis direction;
- the stepped word line structure 26 is formed by the following steps: A photoresist layer with a second opening is formed on the surface of the second part; the second opening exposes one end of the second part away from the first part; the second part is etched multiple times through the photoresist layer to form a stepped word line structure 26 ; Wherein, during multiple etching processes, the size of the second opening in the first direction increases sequentially.
- the stepped word line structure 26 may be formed by the following steps: first, forming a photoresist layer with a second opening on the surface of the second part B-2; the second opening exposes the second part away from the second part B-2. One end of the part; by etching the second part B-2 of the photoresist layer with the second opening, a first step structure is formed, wherein the first step structure includes a step; secondly, a step is formed on the surface of the first step structure.
- the photoresist layer with the third opening exposes part of the first step structure, and the first step structure is etched through the photoresist layer with the third opening to form a second step structure, wherein the second step structure includes two step, the size of the third opening in the
- the photoresist layer of the opening is etched into the second ladder structure to form a third ladder structure, where the third ladder structure includes three steps, and the size of the fourth opening in the X-axis direction is larger than the size of the third opening; repeat the above steps, After multiple etching processes, a stepped word line structure 26 is finally formed.
- a stepped word line structure 26 extending along the X-axis direction is formed on the semiconductor substrate 10.
- the stepped word line structure 26 has layer-by-layer structure from bottom to top along the Z-axis direction. Reduced length.
- the stepped word line structure 26 may also be formed by the following steps: first, forming a first word line with a first length on the substrate surface of the second part B-2, wherein the first word line is The first-layer full-circle gate structure 17 at the bottom of the third direction is electrically connected; secondly, a first isolation unit with a second length is formed on the surface of the first word line; a third isolation unit with a second length is formed on the surface of the first isolation unit.
- the second word line is electrically connected to the second layer full surround gate structure 17 of the previous bottom layer along the third direction, wherein the first length is greater than the second length, and the first isolation unit is configured to isolate the adjacent first word line and the second word line; again, a second isolation unit with a third length is formed on the surface of the second word line; a third word line with a third length is formed on the surface of the second isolation unit, wherein the third word line is The third layer full-circle gate structure 17 is electrically connected from bottom to top along the third direction, wherein the second length is greater than the third length, and the second isolation unit is configured to isolate the adjacent second word line and the third word line;
- the above steps are repeated and multiple forming processes are performed to form a stepped word line structure 26 composed of multiple word lines.
- the method of forming the semiconductor structure further includes: forming a first metal line 291 connected to the capacitor structure 20 and a second metal line 292 connected to the bit line structure 25 respectively. and a third metal line 293 connected to the stepped word line structure 26 .
- the first metal line 291 , the second metal line 292 , and the third metal line 293 are formed through the following steps: on the surface of the stepped word line structure 26 , the first isolation layer 19 , and the third metal line 293 .
- a barrier layer 30 is formed on the surface of the second isolation layer 24 and the third isolation layer 28; the barrier layer 30 is etched to form a first through hole (not shown) exposing the second metal layer 174 and a second through hole exposing the bit line structure 25.
- a first metal line 291 connected to the capacitor structure 20 is formed in the first through hole, and a first metal line 291 is formed in the second through hole.
- a second metal line 292 is formed connected to the bit line structure 25 and a third metal line 293 connected to the stepped word line structure 26 is formed in the third through hole.
- the materials of the first metal line 291, the second metal line 292, and the third metal line 293 may be composed of any conductive metal material, such as titanium nitride.
- the materials of the first metal line 291 , the second metal line 292 and the third metal line 293 may also be copper, aluminum, copper-aluminum alloy, tungsten or other conductive metals.
- the manufacturing process of the semiconductor structure can be simplified and the manufacturing cost of the semiconductor structure can be reduced.
- the capacitor structure in the embodiment of the present disclosure extends along the second direction, that is, the capacitor structure in the embodiment of the present disclosure is horizontal, compared with the vertical capacitor structure with a high aspect ratio, the horizontal capacitor structure can reduce the risk of tipping or The possibility of breaking can improve the stability of the capacitor structure, and the stacked structure formed by stacking multiple capacitor structures in the third direction can form a three-dimensional semiconductor structure, thereby improving the integration of the semiconductor structure and achieving shrinkage.
- the embodiment of the present disclosure also provides a semiconductor structure.
- Figure 4 is a cross-sectional view of the semiconductor structure provided by the embodiment of the present disclosure.
- the semiconductor structure 100 includes: a substrate; the substrate includes components along the Y-axis The first area A and the second area B are arranged in the direction of The active pillars 110 are arranged in an array in the Z-axis direction; the semiconductor structure 100 also includes: a capacitor structure 20 located in the first area A and extending along the Y-axis direction, and a full-surround gate structure 17 located in the second area B; wherein, The full surround gate structure 17 surrounds the surface of the active pillar 110 .
- the capacitor structure 20 includes a first metal layer 173, a second dielectric layer 1712 and a second metal layer 174; the full gate structure 17 includes a dielectric layer 171 and a first metal layer 173, wherein the dielectric layer 171 includes The first dielectric layer 1711 and the second dielectric layer 1712.
- the full-circle gate structure 17 has a wide channel region, which can reduce the short channel effect and improve the gate control capability, thereby improving the performance of the formed semiconductor structure.
- the semiconductor structure 100 further includes: a first isolation layer 19 located between adjacent first metal layers 173 and on the surface of the first metal layer 173 .
- the first isolation layer 19 is used to isolate the adjacent first metal layer 173 .
- a metal layer 173 prevents the first metal layer 173 from leaking electricity.
- the semiconductor structure 100 further includes: a first connection structure 23 connecting the capacitor structure 20 and the full-surround gate structure 17 , and a support structure 14 for supporting the capacitive structure 20 and the full-surround gate structure 17 .
- the support structure 14 is embedded in the semiconductor substrate 10 to achieve a more stable support effect.
- the semiconductor structure 100 further includes a bit line structure 25 located in the second region B and extending along the first direction.
- the semiconductor structure 100 further includes: a second connection structure 27 and a stepped word line structure 26 ; wherein the full-circle gate structure 17 and the stepped word line structure 26 are connected through the second connection structure 27 .
- the semiconductor structure 100 further includes: a first isolation layer 19 located between the first metal layers 173 and on the surface of the first metal layer 173 , wherein the first isolation layer 19 is used to isolate adjacent first metal layers 173 .
- Layer 173 located between the first metal layers 173 and on the surface of the first metal layer 173 , wherein the first isolation layer 19 is used to isolate adjacent first metal layers 173 .
- the semiconductor structure 100 further includes: a second isolation layer 24 located between adjacent first connection structures 23 , and the second isolation layer 24 is used to isolate the adjacent first connection structures 23 .
- the semiconductor structure 100 further includes: a second isolation layer 24 located between adjacent second connection structures 27 , and the second isolation layer 24 is used to isolate the adjacent second connection structures 27 .
- the semiconductor structure 100 further includes: an insulating dielectric layer 175 located on the surface of the second connection structure 27 , wherein the surface of the insulating dielectric layer 175 is flush with the surface of the dielectric layer 171 .
- the semiconductor structure 100 further includes: a third metal layer 176 located on the surface of the insulating dielectric layer 175, wherein the surface of the third metal layer 176 is flush with the surface of the first metal layer 173.
- the semiconductor structure 100 further includes: a third isolation layer 28 located between the third metal layers 176 and on the surface of the third metal layer 176 , wherein the third isolation layer 28 is used to isolate adjacent third metal layers 176 .
- Layer 176 a third isolation layer 28 located between the third metal layers 176 and on the surface of the third metal layer 176 , wherein the third isolation layer 28 is used to isolate adjacent third metal layers 176 .
- the semiconductor structure 100 further includes: a first metal line 291, a second metal line 292, and a third metal line 293; wherein the first metal line 291 is located on the surface of the capacitor structure 20 and is electrically connected to the capacitor structure 20. Connection; the second metal line 292 is located on the surface of the bit line structure 25 and is electrically connected to the bit line structure 25; the third metal line 293 is located on the surface of the stepped word line structure 26 and is electrically connected to the stepped word line structure 26.
- the semiconductor structure 100 further includes: a barrier layer 30 ; wherein the first metal line 291 , the second metal line 292 and the third metal line 293 are located in the barrier layer 30 .
- the semiconductor structure provided by the embodiments of the present disclosure is similar to the formation method of the semiconductor structure provided by the above-mentioned embodiments.
- the capacitor structure extends along the second direction. That is to say, the capacitor structure is arranged horizontally.
- the horizontal capacitor structure can reduce the possibility of tipping or breaking, thereby improving the stability of the capacitor structure. sex.
- the capacitor structures are arranged in arrays along the first direction and the third direction, and the stacked structure formed by stacking multiple capacitor structures in the third direction can form a three-dimensional semiconductor structure, thereby improving the integration level of the semiconductor structure and achieving shrinkage.
- the disclosed devices and methods can be implemented in a non-target manner.
- the device embodiments described above are only illustrative.
- the division of the units is only a logical function division.
- the horizontal capacitor structure can reduce the possibility of tipping or breaking, thereby improving the capacitance structure.
- the stability of the structure, and the stacked structure formed by stacking multiple capacitor structures in the third direction can form a three-dimensional semiconductor structure, thereby improving the integration of the semiconductor structure and achieving shrinkage.
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Abstract
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Claims (24)
- 一种半导体结构的形成方法,所述方法包括:提供基底;所述基底包括沿第一方向延伸的第一隔离凹槽、以及沿所述第一方向和第三方向阵列排布的多个有源柱;其中,所述第一隔离凹槽在第二方向上将所述基底分割为第一区域和第二区域;所述有源柱通过支撑结构支撑;所述第一方向、所述第二方向和所述第三方向两两相互垂直,所述第一方向与所述第二方向平行于所述基底的上表面;在所述有源柱之间的空隙中,形成位于所述第一区域的半电容结构和位于所述第二区域的全环栅结构;处理所述第一区域的有源柱和所述半电容结构,以形成沿所述第二方向延伸的电容结构;在所述第一隔离凹槽中形成连接所述全环栅结构和所述电容结构的第一连接结构。
- 根据权利要求1所述的方法,其中,所述半电容结构和所述全环栅结构通过以下步骤形成:在所述第一区域和所述第二区域的有源柱的表面依次形成介质层和第一金属层;其中,位于所述第一区域的所述第一金属层构成所述半电容结构,位于所述第二区域的所述介质层和所述第一金属层构成所述全环栅结构。
- 根据权利要求2所述的方法,其中,所述基底还包括半导体衬底,所述有源柱和所述支撑结构形成于所述半导体衬底上;所述处理所述第一区域的有源柱和所述半电容结构,包括:在所述第一区域中形成沿所述第一方向延伸的第一开口;所述第一开口暴露出所述半导体衬底;通过所述第一开口,去除所述第一区域中的所述有源柱和所述介质层,以形成第一空隙;在所述第一开口和所述第一空隙中依次形成电介质层和第二金属层;位于所述第一区域的所述第一金属层、所述电介质层和所述第二金属层构成所述电容结构。
- 根据权利要求3所述的方法,其中,在形成所述第一金属层之后,所述方法还包括:在所述第一金属层之间及所述第一隔离凹槽中形成第一隔离层。
- 根据权利要求4所述的方法,其中,所述第一连接结构通过以下步骤形成:去除位于所述第一隔离凹槽中的第一隔离层,以及去除位于所述第一隔离凹槽中第二区域侧壁的介质层和第一金属层,形成沿所述第一方向延伸的第二隔离凹槽;其中,所述第二隔离凹槽暴露出所述第二区域中的有源柱和所述第一区域侧壁的第一金属层;在暴露出的所述有源柱的表面外延生长所述第一连接结构;其中,所述第一连接结构与所述第一区域中的第一金属层相接触。
- 根据权利要求5所述的方法,其中,在形成所述第一连接结构之后,所述方法还包括:在所述第二隔离凹槽中、以及所述第一连接结构之间形成第二隔离层;其中,所述第二隔离层的表面与所述第一隔离层的表面平齐。
- 根据权利要求6所述的方法,其中,所述半导体结构的形成方法还包括:形成位线结构和与所述全环栅结构相连的阶梯状字线结构。
- 根据权利要求7所述的方法,其中,所述位线结构通过以下步骤形成:刻蚀所述有源柱远离所述电容结构的一端,形成沿所述第一方向延伸的位线沟槽;所述位线沟槽暴露出所述第二区域的半导体衬底;在所述位线沟槽中填充位线金属材料,以形成所述位线结构,所述位线结构与所述全环栅结构之间通过所述支撑结构间隔。
- 根据权利要求7所述的方法,其中,所述基底还包括沿所述第二方向延伸第三隔离凹槽;所述第三隔离凹槽在所述第一方向上将所述全环栅结构分割为第一部分和第二部分;所述阶梯状字线结构通过以下步骤形成:在所述第二部分的表面形成具有第二开口光刻胶层;所述第二开口暴露出所述第二部分远离所述第一部分的一端;通过所述光刻胶层多次刻蚀所述第二部分,形成所述阶梯状字线结构;其中,在所述多次刻蚀过程中,所述第二开口在所述第一方向上的尺寸依次增大。
- 根据权利要求9所述的方法,其中,在形成所述阶梯状字线结构之前,所述方法还包括:去除位于所述第三隔离凹槽中的第一隔离层,以及去除位于所述第三隔离凹槽中第二部分侧壁的介质层和第一金属层,形成沿所述第二方向延伸的第四隔离凹槽;其中,所述第四隔离凹槽暴露出所述第一部分的侧壁的第一金属层和所述第二部分的有源柱;在所述第四隔离凹槽中形成连接所述第二部分和所述全环栅结构的第二连接结构。
- 根据权利要求10所述的方法,其中,所述第二连接结构通过以下步骤形成:在暴露出的所述第二部分的有源柱的表面外延生长所述第二连接结构;其中,所述第二连接结构与所述第一部分的侧壁的第一金属层相接触。
- 根据权利要求11所述的方法,其中,所述第一连接结构的厚度为20埃~200埃;所述第二连接结构的厚度为20埃~200埃。
- 根据权利要求11所述的方法,其中,在形成所述第二连接结构之后,所述半导体结构的形成方法还包括:在所述第二连接结构的表面形成绝缘介质层;其中,所述绝缘介质层的表面与所述介质层的表面平齐;在所述绝缘介质层的表面形成第三金属层,所述第三金属层的表面与所述第一金属层的表面平齐;在所述第三金属层的表面和所述第三金属层之间填充第三隔离材料,以形成第三隔离层,其中,所述第三隔离层的表面与所述第一隔离层的表面平齐。
- 根据权利要求13所述的方法,其中,在形成所述第三隔离层之后,所述方法还包括:形成分别与所述电容结构连接的第一金属线、与所述位线结构连接的第二金属线和与所述阶梯状字线结构连接的第三金属线。
- 根据权利要求14所述的方法,其中,所述第一金属线、所述第二金属线、所述第三金属线通过以下步骤形成:在所述阶梯状字线结构表面、所述第一隔离层、所述第二隔离层和所述第三隔离层的表面形成阻挡层;刻蚀所述阻挡层,形成暴露所述第二金属层的第一通孔、暴露所述位线结构的第二通孔和暴露所述阶梯状字线结构的第三通孔;在所述第一通孔形成所述第一金属线、在所述第二通孔形成所述第二金属线且在所述第三通孔中形成所述第三金属线。
- 根据权利要求9至15任一项所述的方法,其中,所述基底通过以下步骤形成:提供所述半导体衬底;在所述半导体衬底上形成叠层结构,所述叠层结构包括交替堆叠的第一半导体层和第二半导体层;刻蚀所述叠层结构,以形成所述第一隔离凹槽;去除所述叠层结构中的第一半导体层。
- 根据权利要求16所述的方法,其中,在形成所述第一隔离凹槽之前,所述方法还包括:刻蚀所述叠层结构,以形成沿所述第二方向延伸的第五隔离凹槽,所述第五隔离凹槽将所述第二半导体层分割为沿所述第一方向排列的多个有源柱;在所述第五隔离凹槽中形成隔离结构。
- 根据权利要求17所述的方法,其中,在形成所述第一隔离凹槽之前,所述方法还包括:刻蚀去除部分所述隔离结构和部分所述第一半导体层,形成多个沿所述第一方向延伸的刻蚀孔,所述刻蚀孔暴露所述有源柱;在所述刻蚀孔中填充支撑材料,以形成环绕所述有源柱的所述支撑结构。
- 根据权利要求18所述的方法,其中,在形成所述第一隔离凹槽之后,且在去除所述叠层结构中的所述第一半导体层之前,所述方法还包括:在所述第一隔离凹槽中填充牺牲材料,以形成牺牲层。
- 一种半导体结构,所述半导体结构通过上述权利要求1至19任一项所述半导体结构的形成方法形成,所述半导体结构包括:基底;所述基底包括沿第二方向排布的第一区域和第二区域;所述第二区域包括沿第一方向和第三方向阵列排布的有源柱;其中,所述第一方向、所述第二方向和所述第三方向两两相互垂直,所述第一方向与所述第二方向平行于所述基底的上表面;位于所述第一区域的电容结构、以及位于所述第二区域的全环栅结构;其中,所述全环栅结构环绕于所述有源柱的表面;连接所述电容结构与所述全环栅结构的第一连接结构;支撑所述电容结构和所述全环栅结构的支撑结构。
- 根据权利要求20所述的半导体结构,其中,所述电容结构包括第一金属层、电介质层和第二金属层;所述全环栅结构包括介质层和所述第一金属层。
- 根据权利要求21所述的半导体结构,其中,所述半导体结构还包括:位于所述第二区域、且沿所述第一方向延伸的位线结构。
- 根据权利要求22所述的半导体结构,其中,所述半导体结构还包括:第二连接结构和阶梯状字线结构;所述全环栅结构与所述阶梯状字线结构通过所述第二连接结构连接。
- 根据权利要求23所述的半导体结构,其中,所述半导体结构还包括:第一金属线、第二金属线和第三金属线;其中,所述第一金属线位于所述电容结构的表面、且与所述电容结构电连接;所述第二金属线位于所述位线结构的表面、且与所述位线结构电连接;所述第三金属线位于所述阶梯状字线结构的表面,且与所述阶梯状字线结构电连接。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22871075.2A EP4319529B1 (en) | 2022-06-16 | 2022-06-30 | Method for forming a semiconductor structure |
| KR1020237040415A KR102795645B1 (ko) | 2022-06-16 | 2022-06-30 | 반도체 구조 및 그 형성 방법 |
| JP2023572160A JP7656731B2 (ja) | 2022-06-16 | 2022-06-30 | 半導体構造の形成方法 |
| US18/163,843 US12507390B2 (en) | 2022-06-16 | 2023-02-02 | Semiconductor structure and method for forming same |
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| CN110520989A (zh) * | 2017-05-08 | 2019-11-29 | 美光科技公司 | 存储器阵列 |
| CN113745224A (zh) * | 2020-05-28 | 2021-12-03 | 美光科技公司 | 包含堆叠水平电容器结构的设备以及相关方法、存储器装置和电子系统 |
| CN113903741A (zh) * | 2020-07-07 | 2022-01-07 | 爱思开海力士有限公司 | 半导体器件 |
| US20220130834A1 (en) * | 2020-10-26 | 2022-04-28 | Micron Technology, Inc. | Vertical digit lines for semiconductor devices |
| CN114582809A (zh) * | 2022-04-29 | 2022-06-03 | 长鑫存储技术有限公司 | 电容器的制作方法、电容器以及存储器 |
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| US9646981B2 (en) * | 2015-06-15 | 2017-05-09 | Sandisk Technologies Llc | Passive devices for integration with three-dimensional memory devices |
| US10535659B2 (en) * | 2017-09-29 | 2020-01-14 | Samsung Electronics Co., Ltd. | Semiconductor memory devices |
| KR102683677B1 (ko) * | 2019-07-12 | 2024-07-11 | 에스케이하이닉스 주식회사 | 수직형 메모리 장치 |
| KR102685508B1 (ko) * | 2019-07-23 | 2024-07-17 | 에스케이하이닉스 주식회사 | 반도체 메모리 장치 |
| KR102760058B1 (ko) * | 2019-12-30 | 2025-01-24 | 에스케이하이닉스 주식회사 | 메모리 장치 및 그 제조 방법 |
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|---|---|---|---|---|
| CN110520989A (zh) * | 2017-05-08 | 2019-11-29 | 美光科技公司 | 存储器阵列 |
| CN113745224A (zh) * | 2020-05-28 | 2021-12-03 | 美光科技公司 | 包含堆叠水平电容器结构的设备以及相关方法、存储器装置和电子系统 |
| CN113903741A (zh) * | 2020-07-07 | 2022-01-07 | 爱思开海力士有限公司 | 半导体器件 |
| US20220130834A1 (en) * | 2020-10-26 | 2022-04-28 | Micron Technology, Inc. | Vertical digit lines for semiconductor devices |
| CN114582809A (zh) * | 2022-04-29 | 2022-06-03 | 长鑫存储技术有限公司 | 电容器的制作方法、电容器以及存储器 |
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| See also references of EP4319529A4 |
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| TWI857626B (zh) | 2024-10-01 |
| CN117337021A (zh) | 2024-01-02 |
| TW202401749A (zh) | 2024-01-01 |
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