WO2022193535A1 - 半导体结构的制作方法及半导体结构 - Google Patents
半导体结构的制作方法及半导体结构 Download PDFInfo
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- WO2022193535A1 WO2022193535A1 PCT/CN2021/111829 CN2021111829W WO2022193535A1 WO 2022193535 A1 WO2022193535 A1 WO 2022193535A1 CN 2021111829 W CN2021111829 W CN 2021111829W WO 2022193535 A1 WO2022193535 A1 WO 2022193535A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/48—Data lines or contacts therefor
- H10B12/488—Word lines
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
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- the present disclosure relates to the field of semiconductor technology, and in particular, to a method for fabricating a semiconductor structure and a semiconductor structure.
- the bit inversion is mainly due to the word line (passing word line) formed in the adjacent isolation area to the word line (active word line, Active Word line) formed in the active area.
- the word line passing word line
- active word line Active Word line
- the distance between the two word line structures can be increased by reducing the width of adjacent word lines.
- the existing adjacent word lines and active word lines are formed at the same time, and it is difficult to generate a large size difference through existing processes such as etching.
- An aspect of the embodiments of the present disclosure provides a method for fabricating a semiconductor structure, which includes: providing a substrate, the substrate including an active region and an isolation region, the isolation region including a first trench and a forming an isolation layer in the first trench, with a sacrificial layer on the active region; removing part of the isolation layer to form a first groove; forming a first mask layer, the first mask layer covering the the upper surface of the active area is filled and the first groove is filled; the first mask layer is planarized so that the upper surface of the first mask layer located above the active area and the upper surface of the first mask layer located on the The upper surface of the first mask layer above the isolation region is flush; part of the first mask layer, part of the isolation layer and part of the substrate are removed to form second trenches and third trenches ; wherein, the second trench is located in the isolation region, the third trench is located in the active region, and the width of the third trench is greater than the width of the second trench; A word line structure is formed in the second trench and the
- a semiconductor structure wherein, it includes a substrate, a second trench and a third trench, and a word line structure; the substrate includes an active region and an isolation region, and the isolation The region includes a first trench and an isolation layer formed in the first trench; the second trench is located in the isolation region, the third trench is located in the active region, and the The width of the third trench is greater than the width of the second trench; the word line structure is disposed in the second trench and the third trench.
- FIGS. 1 to 9 are schematic diagrams of semiconductor structures in several steps of the fabrication method proposed by the present disclosure.
- Fig. 10 is a partial enlarged view of the semiconductor structure in the step shown in Fig. 9;
- 11 to 14 are schematic diagrams of semiconductor structures in other steps of the fabrication method proposed by the present disclosure.
- Example embodiments will now be described more fully with reference to the accompanying drawings.
- Example embodiments can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
- the same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
- FIG. 1 to FIG. 9 and FIG. 11 the schematic diagrams of the semiconductor structure under several steps of the method for fabricating the semiconductor structure proposed by the present disclosure are respectively shown representatively.
- the method for fabricating the semiconductor structure proposed in the present disclosure is described by taking the semiconductor structure applied to, for example, a DRAM as an example. It will be easily understood by those skilled in the art that, in order to apply the related designs of the present disclosure to other types of semiconductor structures or other processes, various modifications, additions, substitutions, deletions or other modifications may be made to the following specific embodiments. variations, which are still within the scope of the principles of the methods of fabricating semiconductor structures presented in this disclosure.
- the fabrication method of the semiconductor structure proposed by the present disclosure includes:
- a substrate 100 is provided, the substrate 100 includes an active region 101 and an isolation region 102, the isolation region 102 includes a first trench 111 and an isolation layer 120 formed in the first trench 111, and the active region 101 has a sacrificial layer 130 on it ;
- the first mask layer 300 covers the upper surface of the active region 101 and fills the first groove 210;
- Part of the first mask layer 300, part of the isolation layer 120 and part of the substrate 100 are removed to form the second trench 112 and the third trench 113; wherein the second trench 112 is located in the isolation region 102, and the third trench 113 is located in the active region 101, and the width of the third trench 113 is greater than the width of the second trench 112;
- a word line structure is formed in the second trench 112 and the third trench 113 .
- the present disclosure can make the mask thickness of the active region 101 thinner than that of the isolation region 102 , so that the width of the word line trench formed by the isolation region 102 in the subsequent process is wider than that of the active region 101 .
- the width of the word line trench is smaller, so that the width of the adjacent word line 702 is smaller than the width of the active word line 701, thereby achieving the effect of reducing the influence of the adjacent word line 702 and the poor bit inversion.
- the semiconductor structure in this step includes a substrate 100 (silicon substrate, Si substrate) and an isolation layer 120 .
- the substrate 100 includes an active region 101 and an isolation region 102
- the isolation region 102 includes a first trench 111 and an isolation layer 120
- the isolation layer 120 is formed in the first trench 111
- the upper surface of the active region 101 has a sacrificial layer 130.
- the first trench 111 is opened on the upper surface of the sacrificial layer 130
- the upper surface of the isolation layer 120 is adapted to be flush with the upper surface of the sacrificial layer 130 .
- the material of the isolation layer 120 may include SiO 2 .
- the material of the sacrificial layer 130 may include Si 3 N 4 .
- FIG. 2 it shows a schematic structural diagram of the semiconductor structure in the step of “forming the first groove 210 ”.
- the semiconductor structure in this step includes the substrate 100 and the isolation layer 120 after being partially removed.
- the first groove 210 is formed by removing part of the isolation layer 120 , and the sacrificial layer 130 is removed while removing part of the isolation layer 120 .
- the upper surface of the isolation layer 120 is lower than the upper surface of the substrate 100 , so that the first groove 210 is formed. That is, the bottom wall of the first groove 210 is defined by the upper surface of the isolation layer 120 after the partial removal, and the side wall of the first groove 210 is defined by the first groove 111 exposed by the above-mentioned removal process. Part of the slot wall definition.
- the sacrificial layer 130 and part of the isolation layer 120 may be removed by a dry etching process.
- the depth h1 of the first groove 210 may be 3 nm to 10 nm, such as 3 nm, 5 nm, 8 nm, 10nm, etc. In other embodiments, the depth h1 of the first groove 210 may also be less than 3 nm, or may be greater than 10 nm, such as 2.5 nm, 11 nm, etc., which is not limited to this embodiment.
- FIG. 3 it shows a schematic structural diagram of the semiconductor structure in the step of “forming the first mask layer 300 ”.
- the semiconductor structure in this step includes the substrate 100 , the isolation layer 120 and the first mask layer 300 .
- the first mask layer 300 covers the upper surface of the active region 101 , and the first mask layer 300 fills the first groove 210 .
- the first mask layer 300 also covers the upper surface of the isolation layer 120 and the exposed part of the groove wall of the first groove 111 .
- the material of the first mask layer 300 may include Si 3 N 4 .
- the first mask layer 300 may be formed by an atomic layer deposition process.
- the thickness of the first mask layer 300 before planarization is 15 nm ⁇ 30 nm , such as 15nm, 20nm, 25nm, 30nm, etc. In other embodiments, the thickness of the first mask layer 300 before planarization may also be less than 15 nm, or may be greater than 30 nm, such as 14 nm, 35 nm, etc., which is not limited to this embodiment.
- the first The second thickness h3 of the portion of the mask layer 300 that covers the active region 101 is approximately 5 nm ⁇ 27 nm
- the first thickness h2 of the portion of the first mask layer 300 that covers the isolation layer 120 remains the first mask layer 300
- the thickness before planarization ie, 15 nm to 30 nm.
- FIG. 4 it shows a schematic structural diagram of the semiconductor structure in the step of “planarizing the first mask layer 300 ”.
- the semiconductor structure in this step includes the substrate 100 , the isolation layer 120 and the first mask layer 300 whose upper surface is planarized.
- the upper surface of the first mask layer 300 is substantially flat after being planarized, that is, the portion of the first mask layer 300 corresponding to the active region 101 and the portion corresponding to the isolation region 102 (first trench 111 ) the top surface is flush.
- the first thickness h2 of the portion of the first mask layer 300 is greater than that corresponding to the active region.
- the second thickness h3 of the portion of 101 is greater than that corresponding to the active region.
- the upper surface of the first mask layer 300 may be subjected to a chemical mechanical polishing process (CMP, Chemical-Mechanical Polishing) for planarization.
- CMP chemical mechanical polishing
- FIG. 5 to FIG. 9 respectively show the schematic diagrams of the structure of the semiconductor structure in several steps in “forming the second trench 112 and the third trench 113 ”.
- the step of “forming the second trench 112 and the third trench 113” it may specifically include:
- part of the first mask layer 300 , part of the isolation layer 120 and part of the substrate 100 are etched.
- the step of forming the photoresist layer 600 with a pattern on the second mask layer 400 includes:
- part of the photoresist material layer 601 is removed by using an exposure and developing technique, and the remaining photoresist material layer 601 constitutes a photoresist layer 600 .
- a dielectric layer 500 may be formed on the second mask layer 400 , and the dielectric layer 500 covers the upper surface of the second mask layer 400 .
- the photoresist material layer 601 covers the upper surface of the dielectric layer 500 .
- the photoresist material layer 601 may also be formed on the second mask layer 400 by other process means, and may directly cover the upper surface of the second mask layer 400, or may be spaced by a medium such as the present embodiment. Other structures of layer 500 .
- the semiconductor structure in this step includes a substrate 100 , an isolation layer 120 , a first mask layer 300 , a second mask layer 400 , a dielectric layer 500 and a photoresist material layer 601 .
- the second mask layer 400 is formed on the upper surface of the first mask layer 300 .
- the dielectric layer 500 is formed on the upper surface of the second mask layer 400 .
- the photoresist material layer 601 is coated on the upper surface of the dielectric layer 500 .
- the semiconductor structure in this step includes a substrate 100 , an isolation layer 120 , a first mask layer 300 , a second mask layer 400 , a dielectric layer 500 and a patterned photoresist layer 600 .
- the second mask layer 400 is formed on the upper surface of the first mask layer 300 .
- the dielectric layer 500 is formed on the upper surface of the second mask layer 400 .
- the photoresist layer 600 is coated on the upper surface of the dielectric layer 500, and the dielectric layer 500 can be used as the bottom layer in the exposure process.
- the patterned photoresist layer 600 has openings 610, and these openings 610 correspond one-to-one with the positions of the second trenches 112 and the third trenches 113 (ie, the positions of the word line structures) formed in the subsequent process, and these The widths of the openings 610 are approximately the same.
- the material of the second mask layer 400 may include carbon (C).
- the second mask layer 400 may be formed by a chemical vapor deposition process.
- the thickness of the second mask layer 400 may be 150nm ⁇ 200nm, such as 150nm, 160nm, 175nm, 200nm, etc. In other embodiments, the thickness of the second mask layer 400 may also be less than 150 nm, or may be greater than 200 nm, such as 140 nm, 210 nm, etc., which is not limited to this embodiment.
- the material of the dielectric layer 500 may include Si, Si 3 N 4 or SiON.
- the steps of etching part of the first mask layer 300 , part of the isolation layer 120 and part of the substrate 100 include: :
- a portion of the second mask layer 400 is etched to form the fourth trench 220 in the second mask layer 400;
- the second mask layer 400 is removed.
- FIG. 7 it shows a schematic structural diagram of the semiconductor structure in the step of “forming the fourth trench 220 ”.
- the semiconductor structure in this step includes the substrate 100 , the isolation layer 120 , the first mask layer 300 , the partially removed second mask layer 400 and the partially removed dielectric layer 500 .
- the pattern of the opening 610 of the photoresist layer 600 is transferred to the dielectric layer 500 and part of the second mask layer 400, and during the exposure process, the photoresist layer is 600 all removed.
- the formed fourth trench 220 opens on the upper surface of the dielectric layer 500 and extends to the second mask layer 400 .
- FIG. 8 it shows a schematic structural diagram of the semiconductor structure in the step of “forming the third groove 230 and the fourth groove 240 ”.
- the semiconductor structure in this step includes the substrate 100 after the partial removal of the active region 101 , the isolation layer 120 after the partial removal, the first mask layer 300 after the partial removal, and the partial removal of the active region 101 . the second mask layer 400 .
- the second mask layer 400, the first mask layer 300, the active region 101 and the isolation layer 120 are continuously etched from the bottom of the fourth trench 220, and the pitch multiplication process is used, so that the second mask layer 400 is etched in the first
- the cross-section of the channel formed in the mask layer 300 is roughly a trapezoid with a larger width in the upper part and a smaller lower part.
- a thickness h2 is greater than the second thickness h3 of the portion covering the active region 101 , so the opening width of the above-mentioned trapezoidal channel on the upper surface of the active region 101 is greater than the opening width on the upper surface of the isolation layer 120 , thus The width of the fourth groove 240 located in the active region 101 formed by continuing downward etching from the opening is greater than the width of the third groove 230 located in the isolation layer 120 .
- the third groove 230 is formed under the fourth trench 220 of the isolation layer 120
- the fourth groove 240 is formed under the fourth trench 220 of the active region 101 .
- FIG. 9 shows a schematic view of the structure of the semiconductor structure in the step of “forming the second trench 112 and the third trench 113 ”, and FIG. 10 representatively shows the structure shown in FIG. 9 A partial enlarged view of the semiconductor structure.
- the semiconductor structure in this step includes the active region 101 continuing to pass through the partially removed substrate 100 , the partially removed isolation layer 120 and the partially removed first mask layer 300 .
- the second trench 112 is formed by continuing to etch the isolation layer 120 from the bottom of the third groove 230
- the third trench 113 is formed by continuing to etch the active region 101 from the bottom of the fourth groove 240
- the second The mask layer 400 is completely removed in the above-mentioned etching process.
- the width of the fourth groove 240 is greater than the width of the third groove 230, and the third groove 113 is formed by continuing etching from the bottom of the fourth groove 240, the second groove 112 is formed from the third groove The bottom of 230 is continuously formed by etching. Therefore, as shown in FIG. 10 , the first width d1 of the third trench 113 is greater than the second width d2 of the second trench 112 .
- the first width d1 of the third trench 113 is the same as that of the second trench 113 .
- the difference between the second widths d2 of the grooves 112 may be 1 nm ⁇ 5 nm, for example, 1 nm, 2 nm, 3.5 nm, 5 nm, and the like.
- the difference between the first width d1 of the third trench 113 and the second width d2 of the second trench 112 may also be greater than 5 nm, such as 5.5 nm, which is not limited to this embodiment.
- the depth of the second trench 112 may be 180 nm ⁇ 200 nm, for example 180nm, 190nm, 195nm, 200nm, etc. In other embodiments, the depth of the second trench 112 may also be less than 180 nm, or may be greater than 200 nm, such as 175 nm, 205 nm, etc., which is not limited to this embodiment.
- the depth of the third trench 113 may be 150 nm to 170 nm, for example 150nm, 155nm, 160nm, 170nm, etc. In other embodiments, the depth of the third trench 113 may also be less than 150 nm, or may be greater than 170 nm, such as 145 nm, 175 nm, etc., which is not limited to this embodiment.
- the step of forming the word line structure in the second trench 112 and the third trench 113 includes:
- a metal barrier material layer 721 is formed, and the metal barrier material layer 721 covers the upper surface of the first mask layer 300, the bottoms and sidewalls of the second trench 112 and the third trench 113;
- a conductive material layer 711 is formed, the conductive material layer 711 covers the surface of the metal barrier material layer, and the conductive material layer 711 fills the second trench 112 and the third trench 113;
- the remaining metal barrier material layer 721 is the barrier layer 720
- the remaining conductive material layer 711 is the conductive layer 710
- the barrier layer 720 and the conductive layer 710 form a word line structure
- the upper surface of the barrier layer 720 and the upper surface of the conductive layer 710 are lower than the upper surface of the active region 101 .
- the upper surface of the barrier layer 720 is lower than the upper surface of the conductive layer 710 . Accordingly, gate-induced drain leakage (GIDL) can be reduced.
- GIDL gate-induced drain leakage
- the step of "forming the word line structure” after the step of forming the word line structure in the second trench 112 and the third trench 113, the step further includes:
- a protective layer 800 is formed, and the protective layer 800 covers the surface of the word line structure and fills the second trench 112 and the third trench 113 .
- FIG. 11 it shows a schematic structural diagram of the semiconductor structure in the step of “forming a metal barrier material layer 721 ”, and specifically shows a partial enlarged view of the semiconductor structure similar to that shown in FIG. 10 .
- the semiconductor structure in this step includes the substrate 100 , the isolation layer 120 , the first mask layer 300 and the metal barrier material layer 721 .
- the metal barrier material layer 721 covers the upper surface of the first mask layer 300 , the bottoms and sidewalls of the second trench 112 and the third trench 113 .
- FIG. 12 it shows a schematic structural diagram of the semiconductor structure in the step of “forming the conductive material layer 711 ”, and specifically shows a partial enlarged view of the semiconductor structure similar to that shown in FIG. 10 .
- the semiconductor structure in this step includes the substrate 100 , the isolation layer 120 , the first mask layer 300 , the metal barrier material layer 721 and the conductive material layer 711 .
- the conductive material layer 711 covers the surface of the metal barrier material layer, and the conductive material layer 711 fills the second trench 112 and the third trench 113
- FIG. 13 it shows a schematic structural diagram of the semiconductor structure in the step of “forming a word line structure”, and specifically shows a partial enlarged view of the semiconductor structure similar to that shown in FIG. 10 .
- the semiconductor structure in this step includes the substrate 100 , the isolation layer 120 , the first mask layer 300 and the word line structure.
- the word line structure is formed in the second trench 112 and the third trench 113 respectively.
- the word line structure ie, the active word line 701
- the word line structure includes a conductive layer 710 and a barrier layer 720, and the barrier layer 720 is formed between the conductive layer 710 and the wall of the trench.
- the method for fabricating a semiconductor structure proposed by the present disclosure covers the substrate with a mask and makes the mask thickness of the active region thinner than the mask thickness of the isolation region, so that the isolation region in the subsequent process can be made thinner.
- the width of the formed word line trench is smaller than the width of the word line trench formed in the active region, so that the width of the adjacent word line is smaller than the width of the active word line, thereby reducing the influence of adjacent word lines and poor bit inversion. effect.
- the applicant conducted an experimental demonstration. There will be a width difference of 0.55 nm between the trenches, and through a large number of experiments, it is concluded that the linear relationship between the depth of the first groove and the difference in the width of the trench is roughly: 0.1 nm width difference/1 nm depth. In actual production, the applicant achieves the depth of the first groove to be about 8 nm ⁇ 10 nm, resulting in a difference in groove width of about 1 nm.
- the semiconductor structure proposed by the present disclosure includes a substrate 100 , the substrate 100 includes an active region 101 and an isolation region 102 , and the isolation region 102 includes a first trench 111 and a
- the isolation layer 120 of the trench 111 is provided with a second trench 112 on the upper surface of the isolation layer 120 , and a third trench 113 is provided on the upper surface of the active region 101 , and the width of the third trench 113 is larger than that of the second trench 112
- the width of the third trench 113 and the second trench 112 are respectively provided with word line structures.
- the semiconductor structure further includes a protective layer 800 , the protective layer 800 covers the surface of the word line structure and fills the second trench 112 and the third trench 113 .
- the word line structure includes a conductive layer 710 and a barrier layer 720 , the conductive layer 710 is provided in the second trench 112 and the third trench 113 , and the barrier layer 720 is provided Between the conductive layer 710 and the groove wall of the trench, the upper surface of the barrier layer 720 and the upper surface of the conductive layer 710 are lower than the upper surface of the active region 101 .
- the material of the conductive layer 710 may include W (tungsten metal).
- the material of the barrier layer 720 may include TiN.
- the material of the isolation layer 120 may include SiO 2 .
- the material of the first mask layer 300 may include Si 3 N 4 .
- the first thickness h2 of the portion of the first mask layer 300 covering the isolation layer 120 may be 15 nm ⁇ 30 nm, such as 15 nm, 20 nm, 25 nm, 30 nm, and the like. In other embodiments, the first thickness h2 of the portion of the first mask layer 300 covering the isolation layer 120 may also be less than 15 nm, or may be greater than 30 nm, such as 14 nm, 35 nm, etc., which is not limited to this embodiment.
- the coverage of the first mask layer 300 is 15 nm ⁇ 30 nm.
- the second thickness h3 in the portion of the active region 101 is approximately 5 nm ⁇ 27 nm.
- the difference between the first width d1 of the third trench 113 and the second width d2 of the second trench 112 may be 1 nm ⁇ 5 nm, such as 1 nm, 2 nm , 3.5nm, 5nm, etc.
- the difference between the first width d1 of the third trench 113 and the second width d2 of the second trench 112 may also be greater than 5 nm, such as 5.5 nm, which is not limited to this embodiment.
- the depth of the second trench 112 may be 180 nm ⁇ 200 nm, for example, 180 nm, 190 nm, 195 nm, 200 nm, and the like. In other embodiments, the depth of the second trench 112 may also be less than 180 nm, or may be greater than 200 nm, such as 175 nm, 205 nm, etc., which is not limited to this embodiment.
- the depth of the third trench 113 may be 150 nm ⁇ 170 nm, such as 150 nm, 155 nm, 160 nm, 170 nm, and the like. In other embodiments, the depth of the third trench 113 may also be less than 150 nm, or may be greater than 170 nm, such as 145 nm, 175 nm, etc., which is not limited to this embodiment.
- the width of the word line trench formed by the isolation region of the semiconductor structure proposed by the present disclosure is smaller than the width of the word line trench formed by the active region, so that the width of the adjacent word line is smaller than the width of the active word line, Further, the effect of reducing the influence of adjacent word lines and poor bit inversion is achieved.
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Claims (19)
- 一种半导体结构的制作方法,包括:提供衬底,所述衬底包括有源区和隔离区,所述隔离区包括第一沟槽和形成于所述第一沟槽内的隔离层,所述有源区上具有牺牲层;去除部分所述隔离层,以形成第一凹槽;形成第一掩膜层,所述第一掩膜层覆盖所述有源区的上表面并填充满所述第一凹槽;平坦化所述第一掩膜层,使位于所述有源区上方的所述第一掩膜层的上表面与位于所述隔离区上方的所述第一掩膜层的上表面齐平;去除部分所述第一掩膜层、部分所述隔离层和部分所述衬底,以形成第二沟槽和第三沟槽;其中,所述第二沟槽位于所述隔离区内,所述第三沟槽位于所述有源区内,所述第三沟槽的宽度大于所述第二沟槽的宽度;于所述第二沟槽和所述第三沟槽内形成字线结构。
- 根据权利要求1所述的半导体结构的制作方法,所述第二沟槽的深度为180nm~200nm。
- 根据权利要求1所述的半导体结构的制作方法,所述第三沟槽的深度为150nm~170nm。
- 根据权利要求1所述的半导体结构的制作方法,所述第三沟槽的宽度与所述第二沟槽的宽度的差值为1nm~5nm。
- 根据权利要求1所述的半导体结构的制作方法,所述形成所述第一凹槽的步骤包括:利用刻蚀工艺去除所述牺牲层和部分所述隔离层,以使所述隔离层的上表面低于所述有源区的上表面。
- 根据权利要求1所述的半导体结构的制作方法,所述第一掩膜层的材质包括Si 3N 4。
- 根据权利要求1所述的半导体结构的制作方法,所述第一掩膜层的厚度为 15nm~30nm。
- 根据权利要求1所述的半导体结构的制作方法,所述第一掩膜层是通过原子层沉积工艺形成。
- 根据权利要求1所述的半导体结构的制作方法,所述平坦化所述第一掩膜层的步骤包括:采用化学机械抛光工艺平坦化所述第一掩膜层。
- 根据权利要求1所述的半导体结构的制作方法,所述去除部分所述第一掩膜层、部分所述隔离层和部分所述衬底,以形成第二沟槽和第三沟槽的步骤包括:于所述第一掩膜层上形成第二掩膜层,所述第二掩膜层覆盖所述第一掩膜层的表面;于所述第二掩膜层上形成具有图形的光刻胶层;以所述光刻胶层作为掩膜,刻蚀部分所述第一掩膜层、部分所述隔离层和部分所述衬底。
- 根据权利要求10所述的半导体结构的制作方法,所述于所述第二掩膜层上形成具有图形的光刻胶层包括:于所述第二掩膜层上形成光刻胶材料层;采用曝光显影技术去除部分所述光刻胶材料层,剩余的所述光刻胶材料层构成所述光刻胶层。
- 根据权利要求10所述的半导体结构的制作方法,所述以所述光刻胶层作为掩膜,刻蚀部分所述第一掩膜层、部分所述隔离层和部分所述衬底的步骤包括:以所述光刻胶层作为掩膜,刻蚀部分所述第二掩膜层,以在所述第二掩膜层内形成第四沟槽;去除所述光刻胶层;沿所述第四沟槽向下刻蚀部分所述第一掩膜层、部分所述隔离层和部分所述衬底;去除所述第二掩膜层。
- 根据权利要求1所述的半导体结构的制作方法,所述于所述第二沟槽和所述第三沟槽内形成字线结构的步骤包括:形成金属阻挡材料层,所述金属阻挡材料层覆盖所述第一掩膜层的上表面、所述第二沟槽和所述第三沟槽的底部及侧壁;形成导电材料层,所述导电材料层覆盖所述金属阻挡材料层的表面且所述导电材料层填充满所述第二沟槽和所述第三沟槽;去除部分所述金属阻挡材料层和部分所述导电材料层,剩余的所述金属阻挡材料层为阻挡层,剩余的所述导电材料层为导电层,所述阻挡层和所述导电层构成所述字线结构;其中,所述阻挡层的上表面和所述导电层的上表面低于所述有源区的上表面。
- 根据权利要求13所述的半导体结构的制作方法,包括:所述阻挡层的上表面低于所述导电层的上表面。
- 根据权利要求1所述的半导体结构的制作方法,所述于所述第二沟槽和所述第三沟槽内形成字线结构的步骤之后,还包括:形成保护层,所述保护层覆盖所述字线结构的表面并填充满所述第二沟槽和所述第三沟槽。
- 一种半导体结构,包括:衬底,所述衬底包括有源区和隔离区,所述隔离区包括第一沟槽和形成于所述第一沟槽内的隔离层;第二沟槽和第三沟槽,所述第二沟槽位于所述隔离区内,所述第三沟槽位于所述有源区内,且所述第三沟槽的宽度大于所述第二沟槽的宽度;字线结构,所述字线结构设置于所述第二沟槽和所述第三沟槽内。
- 根据权利要求16所述的半导体结构,所述隔离层的上表面低于所述有源区的上表面。
- 根据权利要求17所述的半导体结构,所述字线结构包括阻挡层和导电层,所述阻挡层的上表面和所述导电层的上表面低于所述有源区的上表面。
- 根据权利要求18所述的半导体结构,还包括:保护层,所述保护层覆盖所述字线结构的表面并填充满所述第二沟槽和所述第三沟槽。
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| JP2022541010A JP7457127B2 (ja) | 2021-03-18 | 2021-08-10 | 半導体構造の製造方法及び半導体構造 |
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| CN117529103B (zh) * | 2024-01-03 | 2024-05-10 | 长鑫新桥存储技术有限公司 | 半导体结构及其形成方法 |
| CN118553605B (zh) * | 2024-07-24 | 2024-10-22 | 杭州积海半导体有限公司 | 一种掩膜层及形成方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120161227A1 (en) * | 2010-12-22 | 2012-06-28 | Eplida Memory, Inc. | Semiconductor device and method of forming the same |
| CN108305876A (zh) * | 2017-01-11 | 2018-07-20 | 联华电子股份有限公司 | 半导体元件与其制作方法 |
| CN110534480A (zh) * | 2018-05-25 | 2019-12-03 | 长鑫存储技术有限公司 | 半导体储存器结构及其字线制造方法 |
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| CN104425278B (zh) * | 2013-09-04 | 2018-12-21 | 中芯国际集成电路制造(上海)有限公司 | 半导体器件及半导体器件的形成方法 |
| CN110896076B (zh) * | 2018-09-13 | 2024-12-10 | 长鑫存储技术有限公司 | 半导体器件及其制备方法 |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120161227A1 (en) * | 2010-12-22 | 2012-06-28 | Eplida Memory, Inc. | Semiconductor device and method of forming the same |
| CN108305876A (zh) * | 2017-01-11 | 2018-07-20 | 联华电子股份有限公司 | 半导体元件与其制作方法 |
| CN110534480A (zh) * | 2018-05-25 | 2019-12-03 | 长鑫存储技术有限公司 | 半导体储存器结构及其字线制造方法 |
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| See also references of EP4086960A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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