WO2015089826A1 - 半导体器件和制备半导体器件的方法 - Google Patents
半导体器件和制备半导体器件的方法 Download PDFInfo
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- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
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Definitions
- the present invention relates to the field of information technology and, more particularly, to semiconductor devices and methods of fabricating semiconductor devices. Background technique
- Silicon is the cornerstone of microelectronics platforms and is also indispensable for optoelectronic integration. It has the advantages of high integration and low cost. Its oxides are excellent insulating materials, and their high refractive index difference makes them available. Conduct light guide.
- silicon is an indirect bandgap semiconductor, and the efficiency of light absorption and emission is low, and the carrier mobility of silicon is not high, which is limited in high-speed applications.
- III-V compound semiconductors have a direct band gap structure and high electron mobility, and their low-dimensional systems such as multiple quantum wells, quantum dots, etc. also bring excellent performance to optical gain, and adjustment of material composition.
- the optimization of the low-dimensional structure brings various changes to the performance parameters of the device, and can be used to prepare electronic devices such as lasers, solar cells, and the like, and high electron mobility transistors.
- a monolithic integration technique for fabricating m-v semiconductor devices is to epitaxially grow m-v materials on a silicon substrate to prepare devices.
- mv family materials such as gallium arsenide, indium phosphide, etc. and silicon
- direct growth of mv-type materials on silicon introduces high-density line dislocations, resulting in Device performance is degraded and reliability is reduced.
- Embodiments of the present invention provide a semiconductor device and a method of fabricating the same, which are capable of providing an m-v semiconductor device free of line dislocations.
- a semiconductor device comprising:
- First silicon layer a first dielectric layer, the first dielectric layer is located above the first silicon layer, the first dielectric layer has a window, the horizontal dimension of the bottom of the window of the first dielectric layer does not exceed 20 nm;
- An m-v semiconductor layer is distributed over the first dielectric layer and deep into the window of the first dielectric layer, and is connected to the first silicon layer in a window of the first dielectric layer.
- the window of the first dielectric layer is inverted or cylindrical.
- the first silicon layer is a silicon substrate
- the semiconductor device further includes:
- the second silicon layer includes a waveguide, the second silicon layer is located above the first dielectric layer, and a portion of the first dielectric layer between the second silicon layer and the first silicon layer has no window,
- the second silicon layer is directly or indirectly connected to the mv semiconductor layer.
- the first silicon layer includes a waveguide, and a window of the first dielectric layer is located above the waveguide;
- the semiconductor device also includes:
- the third silicon layer is a silicon substrate, and the second dielectric layer is located below the first silicon layer, above the third silicon layer.
- the semiconductor device is a laser
- the m-v semiconductor layer includes a buffer layer, an active region, a spacer layer, an N-type doped transition layer, and a P-type doped transition layer;
- the semiconductor device further includes an N electrode and a P electrode, the N electrode being connected to the N-type doped transition layer, the P electrode being connected to the P-type doped transition layer.
- the semiconductor device is an optical amplifier;
- the semiconductor layer includes a buffer layer, an active region, a spacer layer, an N-type doped transition layer, and a P-type doped transition layer;
- the semiconductor device further includes an N electrode, a P electrode, and an anti-reflection film, the N electrode being connected to the N-type doped transition layer, the p electrode being connected to the p-type doped transition layer, the anti-reflection film being located in the mv-type semiconductor The end face of the layer.
- the semiconductor device is a photodetector;
- the mv semiconductor layer includes an N region, a p region, and an intrinsic region;
- the semiconductor device further includes an N electrode and a P electrode, the N electrode being connected to the N region, the P electrode being connected to the P region.
- the semiconductor device is a transistor
- the m-v semiconductor layer is a channel material of the transistor
- the semiconductor device further includes a source, a drain, a gate, and a gate dielectric layer, the source, the drain, and the gate dielectric layer being coupled to the m-v semiconductor layer, the gate being coupled to the gate dielectric layer.
- a method of fabricating a semiconductor device comprising:
- the silicon layer of the SOI is etched by using a graphic template as a mask.
- the SOI includes a silicon substrate, a dielectric layer on the silicon substrate, and a silicon layer on the dielectric layer. When the dielectric layer is exposed, the etching is stopped, and the pattern is removed. Template, obtaining a silicon layer with a window;
- the dielectric layer is etched by using a silicon layer having a window as a template.
- the etching is stopped, and the silicon layer having the window is removed to obtain a dielectric layer having a window, wherein the bottom of the window of the dielectric layer is laterally
- the size does not exceed 20nm;
- a semiconductor material is grown in the window of the dielectric layer to form a buffer layer, and the semiconductor material is grown on the buffer layer to obtain a semiconductor layer.
- the graphic template is a porous alumina film or a photoresist after extreme ultraviolet exposure development.
- the semiconductor material is a m-v semiconductor material.
- the semiconductor material comprises a predetermined amount of dopant material.
- the silicon layer of the SOI is patterned by using the graphic template as a mask Before performing the etching, the method further includes:
- the photoresist is blocked on a portion of the pattern template so that the silicon layer under the occlusion region is not etched.
- the method further includes: The waveguide is prepared in a silicon layer that is not etched.
- a method of fabricating a semiconductor device comprising:
- the SOI comprises a silicon substrate, a first dielectric layer on the silicon substrate and a silicon layer on the first dielectric layer;
- the second dielectric layer is etched by using the graphic template as a mask.
- the etching is stopped, and the graphic template is removed to obtain a second dielectric layer having a window, wherein the bottom of the window of the second dielectric layer is laterally
- the size does not exceed 20nm;
- a semiconductor material is grown in the window of the second dielectric layer to form a buffer layer, and the semiconductor material is continuously grown on the buffer layer to obtain a semiconductor layer.
- the graphic template is a porous alumina film or a photoresist after extreme ultraviolet exposure development.
- the semiconductor material is a m-v semiconductor material.
- the semiconductor material comprises a predetermined amount of dopant material.
- the waveguide is fabricated in a silicon layer of silicon SOI on the insulator , including:
- a ridge waveguide is prepared in the silicon layer.
- the method before the second dielectric layer is etched by using the graphic template as a mask, the method further includes:
- a photoresist is masked over a portion of the pattern template, wherein the region where the photoresist is not blocked corresponds to the position of the ridge waveguide.
- the semiconductor device of the embodiment of the present invention employs a group III-V semiconductor material, and the m-v group semiconductor material in the semiconductor device of the embodiment of the invention has no line dislocations and thus has high performance.
- FIG. 1 is a schematic structural view of a semiconductor device in accordance with one embodiment of the present invention.
- FIG. 2 is a schematic structural view of a semiconductor device in accordance with another embodiment of the present invention.
- FIG 3 is a schematic structural view of a laser according to an embodiment of the present invention.
- FIG. 4 is a schematic structural view of an optical amplifier according to an embodiment of the present invention.
- Figure 5 is a block diagram showing the structure of a detector in accordance with one embodiment of the present invention.
- FIG. 6 is a schematic structural view of a probe according to another embodiment of the present invention.
- Figure 7 is a block diagram showing the structure of a transistor in accordance with one embodiment of the present invention.
- Figure 8 is a block diagram showing the integration of a transistor on a single chip in accordance with one embodiment of the present invention.
- 9 is a schematic structural view of a semiconductor device in accordance with another embodiment of the present invention.
- FIG. 10 is a schematic structural view of a laser according to another embodiment of the present invention.
- FIG. 11 is a schematic structural view of an optical amplifier according to another embodiment of the present invention.
- Figure 12 is a block diagram showing the structure of a detector in accordance with another embodiment of the present invention.
- Figure 13 is a schematic view showing the structure of a detector according to another embodiment of the present invention.
- Figure 14 is a schematic flow diagram of a method of fabricating a semiconductor device in accordance with one embodiment of the present invention.
- Figure 15 is a schematic illustration of a semiconductor device at various stages of a method of fabricating a semiconductor device in accordance with one embodiment of the present invention.
- Figure 16 is a schematic flow chart of a method of fabricating a semiconductor device in accordance with another embodiment of the present invention.
- Figure 17 is a schematic illustration of a semiconductor device at various stages of a method of fabricating a semiconductor device in accordance with another embodiment of the present invention.
- FIG. 1 shows a schematic structural view of a semiconductor device 100 in accordance with one embodiment of the present invention.
- the semiconductor device loo includes a first silicon layer no, a first dielectric layer 120 and an mv semiconductor layer 130.
- the first silicon layer 110 is a silicon substrate.
- the first dielectric layer 120 is over the first silicon layer 110.
- the material of the first dielectric layer 120 may be silicon oxide or silicon nitride or a mixture thereof.
- the first dielectric layer 120 has a window 121, and the lateral dimension of the bottom of the window 121 does not exceed 20 nm.
- the number of the windows 121 is not limited and may vary depending on the size of the semiconductor device 100.
- the III-V semiconductor layer 130 is distributed over the first dielectric layer 120 and penetrates into the window 121 of the first dielectric layer 120.
- the III-V semiconductor layer 130 is connected to the first silicon layer 110 in the window 121 of the first dielectric layer 120.
- the III-V semiconductor layer 130 can be obtained by first growing a m-v semiconductor material in the window 121 and continuing to grow the m-v semiconductor material over the first dielectric layer 120.
- the m-v semiconductor material may include one or more of the following:
- Aluminum phosphide ( ⁇ 1 ⁇ ), gallium phosphide (GaP), indium phosphide (InP), aluminum arsenide (AlAs), gallium arsenide (GaAs), indium arsenide (InAs), aluminum telluride (AlSb), germanium Gallium (GaSb), indium antimonide (InSb), aluminum nitride (A1N), gallium nitride (GaN), indium nitride (InN), and their ternary and quaternary compounds.
- the lateral dimension of the bottom of the window 121 of the first dielectric layer 120 does not exceed 20 nm, that is, the size of the contact surface of the III-V semiconductor layer 130 and the first silicon layer 110 is not in any direction. More than 20 nm, such that the III-V semiconductor material in the window 121 (i.e., the mv semiconductor material at the contact surface) has no line dislocations. That is, the semiconductor device of the embodiment of the present invention is an m-v semiconductor device having no line dislocations. Since the m-v group semiconductor material has a direct band gap structure and a high electron mobility, the semiconductor device performance can be improved, and therefore, the semiconductor device of the embodiment of the present invention has high crystal quality and device performance.
- the semiconductor device of the embodiment of the present invention employs a m-v group semiconductor material, and the m-v group semiconductor material has no line dislocations and thus has high performance.
- the window 121 of the first dielectric layer 120 may be inverted or cylindrical.
- the embodiment of the present invention only defines that the lateral dimension of the bottom of the window 121 does not exceed 20 nm, and does not limit the shape of the window 121, that is, it may be other shapes.
- the semiconductor device 100 optionally, as shown in FIG. 2, the semiconductor device 100 further includes: a second silicon layer 140.
- the second silicon layer 140 is over the first dielectric layer 120, and the portion of the first dielectric layer 120 between the second silicon layer 140 and the first silicon layer 110 has no window. That is, the second silicon layer 140 is located above the windowless portion of the first dielectric layer 120.
- the second silicon layer 140 is directly or indirectly connected to the III-V semiconductor layer 130.
- the second silicon layer 140 includes a waveguide through which light output from the III-V semiconductor layer 130 can be coupled.
- the semiconductor device 100 may further include a filling layer 150.
- the filling layer 150 is used to fill the gap between the III-V semiconductor layer 130 and the second silicon layer 140.
- it may be filled with a material such as amorphous silicon.
- the semiconductor device 100 of the embodiment of the present invention may specifically be a laser, an optical amplifier, a photodetector, a transistor or a solar cell or the like.
- FIG. 3 is a schematic structural view of a laser according to an embodiment of the present invention.
- the semiconductor device 100 is a laser.
- the III-V semiconductor layer 130 constitutes a main structure of the laser, and includes a buffer layer 131, an active region 134, a spacer 133, an N-type doped transition layer 132, and a P-type doped transition layer 135.
- the III-V semiconductor material in the window 121 forms a buffer layer 131, and the semiconductor material in the buffer layer 131 has no line dislocations.
- the laser light is generated and amplified in the active region 134.
- Active region 134 may comprise multiple quantum wells or quantum dots to enhance optical gain.
- the semiconductor device 100 further includes an N electrode 160 and a P electrode 170.
- the N electrode 160 is connected to the N-type doped transition layer 132
- the P electrode 170 is connected to the P-type doped transition layer 135.
- a grating structure may also be included.
- Light output from the main structure of the laser is coupled into the waveguide in the second silicon layer 140.
- the laser in this embodiment uses the III-V semiconductor material to form the main structure of the laser, and the III-V semiconductor material has no line dislocations and thus has high performance.
- FIG. 4 is a schematic structural view of an optical amplifier according to an embodiment of the present invention.
- the semiconductor device 100 is an optical amplifier, also referred to as a Semiconductor Optical Amplifier (SOA).
- SOA Semiconductor Optical Amplifier
- the mv-type semiconductor layer 130 constitutes the main body of the optical amplifier.
- the bulk structure includes a buffer layer 131, an active region 134, a spacer layer 133, an N-type doped transition layer 132, and a P-type doped transition layer 135.
- the III-V semiconductor material in the window 121 forms a buffer layer 131, and the semiconductor material in the buffer layer 131 has no line dislocations.
- the active region 134 may comprise bulk materials, multiple quantum wells, quantum dots or quantum stubs, and the like.
- the semiconductor device 100 further includes an N electrode 160, a P electrode 170, and an anti-reflection film 180.
- the N electrode 160 is connected to the N-type doped transition layer 132
- the P electrode 170 is connected to the P-type doped transition layer 135.
- the anti-reflection film 180 is located on the end face of the III-V semiconductor layer 130, and the anti-reflection film is also referred to as an anti-reflection film.
- the main structure of the optical amplifier is formed using the m-v semiconductor material, and the m-v semiconductor material has no line dislocations and thus has high performance.
- 5 and 6 are schematic structural views of a photodetector according to an embodiment of the present invention.
- the semiconductor device 100 is a photodetector.
- the III-V semiconductor layer 130 includes an N region 136, a P region 137, and an intrinsic region 138.
- N region 136 and P region 137 are doped regions.
- N-zone 136 and P-zone 137 may be vertically distributed (as shown in Figure 5) or distributed on the surface of the device (as shown in Figure 6).
- the semiconductor device 100 further includes an N electrode 160 and a P electrode 170.
- the 136 is connected, and the P electrode 170 is connected to the P zone 137.
- Light is coupled into the detector from the waveguide in the second silicon layer 140 to be detected.
- the photodetector in this embodiment employs a m-v group semiconductor material, and the m-v group semiconductor material has no line dislocations and thus has high performance.
- FIG. 7 is a schematic structural view of a transistor according to an embodiment of the present invention.
- the semiconductor device 100 is a transistor.
- the III-V semiconductor layer 130 is a channel material of a transistor, that is, the transistor of the embodiment of the present invention is an m-v semiconductor transistor. Quantum wells or quantum dots can be included in the channel material.
- the semiconductor device 100 further includes a source 181, a drain 182, a gate 183, and a gate dielectric layer 184.
- the source 181, the drain 182, and the gate dielectric layer 184 are connected to the III-V semiconductor layer 130, and the gate 183 is connected to the gate dielectric layer 184.
- the mv semiconductor transistor of the embodiment of the present invention can be monolithically integrated with the Si transistor, as shown in FIG.
- a variety of transistors can be obtained by using different m-v semiconductor materials as the channel material.
- a high electron mobility transistor HMT
- a metal-semiconductor field effect transistor Metal-Semiconductor Field Effect Transistor
- MESFET Metal-Semiconductor Field Effect Transistor
- FinFET Fin Field Effect Transistor
- MODFET Modulation Doped Field Effect Transistor
- the transistor in this embodiment employs a m-v group semiconductor material, and the m-v group semiconductor material has no line dislocations and thus has high performance.
- FIG. 9 is a block diagram showing the structure of a semiconductor device 200 in accordance with another embodiment of the present invention.
- the semiconductor device 200 includes a first silicon layer 210, a first dielectric layer 220, and a III-V semiconductor layer 230.
- the first dielectric layer 220 is located above the first silicon layer 210.
- the material of the first dielectric layer 220 may be silicon oxide or silicon nitride or a mixture thereof.
- the first dielectric layer 220 has a window 221, and the lateral dimension of the bottom of the window 221 does not exceed 20 nm.
- the number of the windows 221 is not limited and may vary depending on the size of the semiconductor device 200.
- the III-V semiconductor layer 230 is distributed over the first dielectric layer 220 and penetrates into the window 221 of the first dielectric layer 220.
- the III-V semiconductor layer 230 is connected to the first silicon layer 210 in the window 221 of the first dielectric layer 220.
- the III-V semiconductor layer 230 can be obtained by first growing a III-V semiconductor material in the window 221 and continuing to grow a III-V semiconductor material over the first dielectric layer 220.
- the III-V semiconductor material may include one or more of the following:
- Aluminum phosphide ( ⁇ 1 ⁇ ), gallium phosphide (GaP), indium phosphide (InP), aluminum arsenide (AlAs), gallium arsenide (GaAs), indium arsenide (InAs), aluminum telluride (AlSb), germanium Gallium (GaSb), indium antimonide (InSb), aluminum nitride (A1N), gallium nitride (GaN), indium nitride (InN), and their ternary and quaternary compounds.
- the first silicon layer 210 comprises a waveguide, such as a ridge waveguide.
- the window 221 of the first dielectric layer 220 is located above the waveguide.
- the semiconductor device 200 further includes:
- the second dielectric layer 240 and the third silicon layer 250 are identical to the second dielectric layer 240 and the third silicon layer 250.
- the third silicon layer 250 is a silicon substrate.
- the second dielectric layer 240 is located below the first silicon layer 210 and above the third silicon layer 250.
- the material of the second dielectric layer 240 is similar to the first dielectric layer 220 and may be silicon oxide or silicon nitride or a mixture thereof.
- the lateral dimension of the bottom of the window 221 of the first dielectric layer 220 does not exceed 20 nm, that is, the size of the contact surface of the III-V semiconductor layer 230 and the first silicon layer 210 is not in any direction. More than 20 nm, such that the III-V semiconductor material in the window 221 (i.e., the III-V semiconductor material at the contact surface) has no line dislocations. That is, the semiconductor device of the embodiment of the present invention is an m-v semiconductor device having no line dislocations. Since the m-v group semiconductor material has a direct band gap structure and a high electron mobility, the semiconductor device performance can be improved, and therefore, the semiconductor device of the embodiment of the present invention has high crystal quality and device performance.
- the window 221 of the first dielectric layer 220 may be an inverted cone or a cylinder.
- the embodiment of the present invention only defines that the lateral dimension of the bottom of the window 221 is not more than 20 nm, and the shape of the window 221 is not limited, that is, it may be other shapes. Specifically, when the window 221 is inverted or cylindrical, the diameter of the bottom portion thereof does not exceed 20 nm; and when the window 221 has other shapes, the lateral dimension of the bottom portion does not exceed 20 nm in any direction.
- the semiconductor device 200 of the embodiment of the present invention may specifically be a laser, an optical amplifier, a photodetector, a transistor or a solar cell or the like.
- FIG. 10 is a schematic structural view of a laser according to another embodiment of the present invention.
- the semiconductor device 200 is a laser.
- the III-V semiconductor layer 230 constitutes a main structure of the laser, and includes a buffer layer 231, an active region 234, a spacer 233, an N-type doped transition layer 232, and a P-type doped transition layer 235.
- the III-V semiconductor material in the window 221 forms a buffer layer 231, and the semiconductor material in the buffer layer 231 has no line dislocations.
- the light of the laser is generated and amplified in the active region 234.
- Active region 234 may comprise multiple quantum wells or quantum dots to enhance optical gain.
- the semiconductor device 200 further includes an N electrode 260 and a P electrode 270.
- the N electrode 260 is connected to the N-type doped transition layer 232
- the P electrode 270 is connected to the P-type doped transition layer 235.
- a grating structure may also be included.
- Light output from the main structure of the laser is coupled into the waveguide in the first silicon layer 210.
- the laser in this embodiment uses a mv group semiconductor material to form a main structure of the laser. Moreover, the i ⁇ - ⁇ semiconductor materials have no line dislocations and therefore have high performance.
- FIG. 11 is a schematic structural diagram of an optical amplifier according to another embodiment of the present invention.
- the semiconductor device 200 is an optical amplifier, also referred to as a semiconductor optical amplifier SOA.
- the ⁇ -V semiconductor layer 230 constitutes a main structure of the optical amplifier, and includes a buffer layer 231, an active region 234, a spacer 233, a erbium-doped transition layer 232, and a erbium-doped transition layer 235.
- the III-V semiconductor material in the window 221 forms a buffer layer 231, and the semiconductor material in the buffer layer 231 has no line dislocations.
- the active region 234 may comprise bulk material, multiple quantum wells, quantum dots or quantum stubs, and the like.
- the semiconductor device 200 further includes an N electrode 260 and a P electrode 270.
- the N electrode 260 is connected to the N-type doped transition layer 232
- the P electrode 270 is connected to the P-type doped transition layer 235.
- An antireflection film is also included, which is located on the end face of the III-V semiconductor layer.
- the main structure of the optical amplifier is formed using the m-v semiconductor material, and the m-v semiconductor material has no line dislocations and thus has high performance.
- FIGS. 12 and 13 are schematic structural views of a photodetector according to another embodiment of the present invention.
- the semiconductor device 200 is a photodetector.
- the III-V semiconductor layer 230 includes an N region 236, a P region 237, and an intrinsic region 238.
- N region 236 and P region 237 are doped regions.
- N-zone 236 and P-zone 237 may be vertically distributed (as shown in Figure 12) or distributed on the surface of the device (as shown in Figure 13).
- the semiconductor device 200 further includes an N electrode 260 and a P electrode 270.
- the N electrode 260 is connected to the N region 236, and the P electrode 270 is connected to the P region 237.
- Light is coupled into the detector from a waveguide in the first silicon layer 210 to be detected.
- the photodetector in this embodiment employs a m-v group semiconductor material, and the m-v group semiconductor material has no line dislocations and thus has high performance.
- the semiconductor device of the embodiment of the present invention has been described in detail above, and a method of manufacturing a semiconductor device of an embodiment of the present invention will be described in detail below.
- Figure 14 shows a schematic flow diagram of a method 300 of fabricating a semiconductor device in accordance with one embodiment of the present invention.
- the method 300 includes: S310, etching a silicon layer of SOI (Silicon On Insulator) by using a graphic template as a mask, the SOI includes a silicon substrate, a dielectric layer on the silicon substrate, and a silicon layer on the dielectric layer. When the dielectric layer is exposed, the etching is stopped, and the graphic template is removed to obtain a silicon layer having a window;
- SOI Silicon On Insulator
- the dielectric layer is etched by using a silicon layer having a window as a template, and when the silicon substrate is exposed, the etching is stopped, and the silicon layer having the window is removed to obtain a dielectric layer having a window, wherein the bottom of the window of the dielectric layer The lateral dimension does not exceed 20 nm;
- the Silicon On Insulator includes a silicon substrate 410, a dielectric layer 420, and a silicon layer 440.
- the thickness of dielectric layer 420 and silicon layer 440 can be selected to vary depending on the needs and applications of the device.
- the silicon layer of the SOI is first etched using the pattern template 490.
- the pattern template 490 is a porous aluminum oxide film or a photoresist after extreme ultraviolet exposure development. If a porous alumina film is used, the porous alumina film is directly attached to the silicon layer 440 of the SOI (as shown by a in Fig. 15). A thin oxide layer may be formed on the silicon layer 440 to facilitate subsequent removal of the porous aluminum oxide film. If the photoresist after development by extreme ultraviolet exposure is used, the photoresist is first coated on the silicon layer 440, and the photoresist is exposed by an extreme ultraviolet lithography source, and then developed to obtain a pattern template 490.
- the photoresist may be masked over a portion of the pattern template 490 (shown as b in Figure 15) so that the silicon layer under the occlusion region is not etched.
- the silicon layer 440 can be selectively etched by controlling the etch parameters without etching the dielectric layer 420 under the silicon layer 440. When the dielectric layer 420 is exposed, the etching is stopped.
- a window 441 with a decreasing aperture is formed in the silicon layer 440, i.e., the top lateral dimension of the window 441 is larger than the bottom lateral dimension (shown as b in Figure 15).
- the graphic template 490 is removed, resulting in a patterned silicon layer 440 having a window 441.
- the removal method can be chemically applied.
- the dielectric layer 420 is etched using the patterned silicon layer 440 having the window 441 as a template.
- a window 421 is formed in the dielectric layer 420 (shown as c in Fig. 15). Due to the shadow effect, the lateral dimension of the bottom of the window 421 will be smaller than the top lateral dimension, that is, the dielectric layer 420 The horizontal dimension of the bottom of the window 421 is much smaller than the window size of the graphic template 490.
- the unobstructed silicon layer is then removed (as indicated by d in Figure 15).
- the semiconductor material is selectively grown in the window 421 of the dielectric layer 420, the buffer layer is formed first, and the semiconductor material is further grown on the buffer layer to obtain the semiconductor layer 430 (shown as e in Fig. 15).
- the remaining portion of the silicon layer 440 is protected prior to growth of the semiconductor material, for example, by forming a dielectric protective layer 155 by silicon oxide or silicon nitride.
- the semiconductor material is a III-V semiconductor material, for example, one or more of the following:
- Chemical Vapor Deposition CVD
- Atomic Layer Deposition ALD
- CVD may include Metal-Organic Chemical Vapor Deposition (MOCVD).
- PECVD Plasma Enhanced Chemical Vapor Deposition
- LPCVD Low Pressure Chemical Vapor Deposition
- UHVCVD Ultra High Vacuum Chemical Vapor Deposition
- RPCVD reaction Reactive Plasma Chemical Vapor Deposition
- the semiconductor material may also include a predetermined amount of dopant material to form a PN or PIN structure.
- the grown semiconductor material can form an active region, and the active region can include structures such as multiple quantum wells or quantum dots.
- the method 300 further includes:
- the waveguide is prepared in a silicon layer that is not etched.
- a waveguide is prepared in the remaining portion of the silicon layer 440.
- the dielectric protective layer 155 it is also necessary to remove the dielectric protective layer 155 to fill the remaining voids to form the filling layer 150.
- it may be filled with a material such as amorphous silicon.
- the size of the window template is much smaller than the size of the graphic template, so you can control the window of the graphic template.
- the port size forms a smaller window in the dielectric layer to achieve the condition of dislocation growth of different mv semiconductor materials.
- the lateral dimension of the bottom of the window formed in the dielectric layer does not exceed 20 nm, and may be less than 10 nm, and may even not exceed 2 nm.
- the lateral dimension does not exceed the window of 20 nm, and therefore, the III-V semiconductor material in the semiconductor device prepared by the method for fabricating the semiconductor device of the embodiment of the present invention has no line dislocations, and therefore, the method for fabricating the semiconductor device of the embodiment of the present invention It is possible to prepare semiconductor devices of higher performance.
- the semiconductor device 100 and in particular, in conjunction with the specific structure of the laser, optical amplifier, photodetector or transistor given in the foregoing embodiments, a corresponding semiconductor device can be fabricated.
- Figure 16 shows a schematic flow diagram of a method 400 of fabricating a semiconductor device in accordance with another embodiment of the present invention. As shown in Figure 16, the method 400 includes:
- S410 preparing a waveguide in a silicon layer of the SOI, wherein the SOI comprises a silicon substrate, a first dielectric layer on the silicon substrate and a silicon layer on the first dielectric layer;
- the SOI includes a silicon substrate 510, a first dielectric layer 520, and a silicon layer 540.
- a waveguide is prepared in the silicon layer 540 of the SOI, for example, a ridge waveguide is prepared, as shown by a in Fig. 17.
- a second dielectric layer 550 is formed on the silicon layer 540 having a waveguide.
- the pattern template 590 is a porous alumina film or a photoresist after extreme ultraviolet exposure development. Prior to etching, the photoresist may be masked over a portion of the pattern template 590, wherein the area not masking the photoresist corresponds to the position of the waveguide (as indicated by b in Figure 17).
- the second dielectric layer 550 is etched to expose the silicon layer 540, and a window 551 is formed on the second dielectric layer 550 (shown as c in FIG. 17). Due to the shadow effect of the graphic template 590 on the etched beam, the bottom lateral dimension of the window 551 formed on the second dielectric layer 550 is smaller than the top lateral dimension, and thus, the second dielectric layer can be controlled by controlling the window size of the graphic template 590. A smaller window is formed in 550, for example, a window having a lateral dimension of no more than 20 nm is formed.
- the photoresist and pattern template 590 are then removed.
- the semiconductor material is selectively grown in the window 551 of the second dielectric layer 550, a buffer layer is formed first, and the semiconductor material is further grown on the buffer layer to obtain a semiconductor layer 530 (shown as d in Fig. 17).
- the semiconductor material is a III-V semiconductor material, for example, one or more of the following:
- the semiconductor material may further comprise a predetermined amount of dopant material.
- the lateral dimension does not exceed the window of 20 nm, and therefore, the III-V semiconductor material in the semiconductor device prepared by the method for fabricating the semiconductor device of the embodiment of the present invention has no line dislocations, and therefore, the method for fabricating the semiconductor device of the embodiment of the present invention It is possible to prepare semiconductor devices of higher performance.
- the semiconductor device 200 and in particular, in conjunction with the specific structure of the laser, optical amplifier, photodetector or transistor given in the foregoing embodiment, a corresponding semiconductor device can be fabricated.
- the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
- the implementation process constitutes any limitation.
- the disclosed systems, devices, and methods may be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
- the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
- the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
- the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
- a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
- the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .
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Abstract
Description
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| JP2016541187A JP2017511596A (ja) | 2013-12-20 | 2013-12-20 | 半導体デバイスおよび半導体デバイスの製造方法 |
| EP18160118.8A EP3428957B1 (en) | 2013-12-20 | 2013-12-20 | Method for producing semiconductor device |
| PCT/CN2013/090099 WO2015089826A1 (zh) | 2013-12-20 | 2013-12-20 | 半导体器件和制备半导体器件的方法 |
| CN201380004030.3A CN105264674B (zh) | 2013-12-20 | 2013-12-20 | 半导体器件和制备半导体器件的方法 |
| KR1020167017473A KR20160089519A (ko) | 2013-12-20 | 2013-12-20 | 반도체 디바이스 및 반도체 디바이스 제조 방법 |
| CN201811378239.7A CN109860022B (zh) | 2013-12-20 | 2013-12-20 | 半导体器件和制备半导体器件的方法 |
| US15/186,681 US20160291248A1 (en) | 2013-12-20 | 2016-06-20 | Semiconductor device and method for producing semiconductor device |
| US15/975,496 US10234629B2 (en) | 2013-12-20 | 2018-05-09 | Method for reducing threading dislocation of semiconductor device |
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- 2013-12-20 EP EP13899857.0A patent/EP3070751A4/en not_active Withdrawn
- 2013-12-20 JP JP2016541187A patent/JP2017511596A/ja active Pending
- 2013-12-20 CN CN201380004030.3A patent/CN105264674B/zh active Active
- 2013-12-20 WO PCT/CN2013/090099 patent/WO2015089826A1/zh not_active Ceased
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2016
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| CN114171394A (zh) * | 2021-06-18 | 2022-03-11 | 格芯致显(杭州)科技有限公司 | 半导体装置的制备方法和半导体装置 |
Also Published As
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|---|---|
| US20180259708A1 (en) | 2018-09-13 |
| US20160291248A1 (en) | 2016-10-06 |
| CN105264674B (zh) | 2019-01-18 |
| JP2017511596A (ja) | 2017-04-20 |
| EP3070751A4 (en) | 2017-01-11 |
| EP3428957A1 (en) | 2019-01-16 |
| US10234629B2 (en) | 2019-03-19 |
| CN105264674A (zh) | 2016-01-20 |
| EP3070751A1 (en) | 2016-09-21 |
| CN109860022B (zh) | 2022-09-23 |
| EP3428957B1 (en) | 2021-12-08 |
| CN109860022A (zh) | 2019-06-07 |
| KR20160089519A (ko) | 2016-07-27 |
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