CN111276394A - 一种分离栅mosfet的制作方法 - Google Patents
一种分离栅mosfet的制作方法 Download PDFInfo
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- CN111276394A CN111276394A CN202010100261.6A CN202010100261A CN111276394A CN 111276394 A CN111276394 A CN 111276394A CN 202010100261 A CN202010100261 A CN 202010100261A CN 111276394 A CN111276394 A CN 111276394A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 101
- 238000000926 separation method Methods 0.000 claims abstract description 71
- 229920005591 polysilicon Polymers 0.000 claims abstract description 69
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 49
- 239000010703 silicon Substances 0.000 claims abstract description 49
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 29
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000003647 oxidation Effects 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 238000000151 deposition Methods 0.000 claims abstract description 12
- 238000005530 etching Methods 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 125000006850 spacer group Chemical group 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 31
- 238000001039 wet etching Methods 0.000 claims description 10
- 238000001312 dry etching Methods 0.000 claims description 8
- 238000004518 low pressure chemical vapour deposition Methods 0.000 claims description 5
- 238000009279 wet oxidation reaction Methods 0.000 claims description 5
- 238000005229 chemical vapour deposition Methods 0.000 claims description 4
- 238000001259 photo etching Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003071 parasitic effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 144
- 239000002184 metal Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02164—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon oxide, e.g. SiO2
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- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
- H01L21/02233—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer
- H01L21/02236—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor
- H01L21/02238—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor silicon in uncombined form, i.e. pure silicon
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- H01L29/42356—Disposition, e.g. buried gate electrode
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- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66484—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with multiple gate, at least one gate being an insulated gate
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- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
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Abstract
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113078067A (zh) * | 2021-03-30 | 2021-07-06 | 电子科技大学 | 一种沟槽分离栅器件的制造方法 |
CN113725078A (zh) * | 2021-09-11 | 2021-11-30 | 捷捷微电(上海)科技有限公司 | 一种分离栅mosfet的制作方法 |
CN113782444A (zh) * | 2021-09-13 | 2021-12-10 | 济南市半导体元件实验所 | 一种底部厚氧沟槽mosfet器件的制造方法 |
CN113851523A (zh) * | 2021-09-02 | 2021-12-28 | 深圳市威兆半导体有限公司 | 一种屏蔽栅mosfet及制作方法 |
CN113972269A (zh) * | 2020-07-24 | 2022-01-25 | 和舰芯片制造(苏州)股份有限公司 | 一种sgt功率mosfet的制备方法 |
CN114068687A (zh) * | 2021-11-26 | 2022-02-18 | 上海华虹宏力半导体制造有限公司 | 栅间氧化层的形成方法及屏蔽栅沟槽型器件的形成方法 |
WO2023016305A1 (zh) * | 2021-08-11 | 2023-02-16 | 重庆万国半导体科技有限公司 | 一种分离栅功率器件及其制造方法 |
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CN108172517A (zh) * | 2017-12-29 | 2018-06-15 | 中航(重庆)微电子有限公司 | 一种屏蔽栅沟槽mosfet制造方法 |
CN108364870A (zh) * | 2018-01-23 | 2018-08-03 | 西安龙腾新能源科技发展有限公司 | 改善栅极氧化层质量的屏蔽栅沟槽mosfet制造方法 |
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CN101238581A (zh) * | 2005-08-09 | 2008-08-06 | 飞兆半导体公司 | 在屏蔽的栅极场效应晶体管中形成多晶硅层间电介质的结构和方法 |
CN101379610A (zh) * | 2006-02-10 | 2009-03-04 | 飞兆半导体公司 | 用于功率mosfet应用的低电阻栅极及其制造方法 |
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CN103855017A (zh) * | 2012-12-03 | 2014-06-11 | 上海华虹宏力半导体制造有限公司 | 形成沟槽型双层栅mos结构两层多晶硅横向隔离的方法 |
CN105789043A (zh) * | 2014-12-25 | 2016-07-20 | 中航(重庆)微电子有限公司 | 沟槽型半导体器件及其制作方法 |
CN105355560A (zh) * | 2015-10-27 | 2016-02-24 | 上海华虹宏力半导体制造有限公司 | 具有屏蔽栅的沟槽栅mosfet的制造方法 |
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CN108364870A (zh) * | 2018-01-23 | 2018-08-03 | 西安龙腾新能源科技发展有限公司 | 改善栅极氧化层质量的屏蔽栅沟槽mosfet制造方法 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113972269A (zh) * | 2020-07-24 | 2022-01-25 | 和舰芯片制造(苏州)股份有限公司 | 一种sgt功率mosfet的制备方法 |
CN113078067A (zh) * | 2021-03-30 | 2021-07-06 | 电子科技大学 | 一种沟槽分离栅器件的制造方法 |
WO2023016305A1 (zh) * | 2021-08-11 | 2023-02-16 | 重庆万国半导体科技有限公司 | 一种分离栅功率器件及其制造方法 |
CN113851523A (zh) * | 2021-09-02 | 2021-12-28 | 深圳市威兆半导体有限公司 | 一种屏蔽栅mosfet及制作方法 |
CN113851523B (zh) * | 2021-09-02 | 2022-12-13 | 深圳市威兆半导体股份有限公司 | 一种屏蔽栅mosfet及制作方法 |
CN113725078A (zh) * | 2021-09-11 | 2021-11-30 | 捷捷微电(上海)科技有限公司 | 一种分离栅mosfet的制作方法 |
CN113782444A (zh) * | 2021-09-13 | 2021-12-10 | 济南市半导体元件实验所 | 一种底部厚氧沟槽mosfet器件的制造方法 |
CN114068687A (zh) * | 2021-11-26 | 2022-02-18 | 上海华虹宏力半导体制造有限公司 | 栅间氧化层的形成方法及屏蔽栅沟槽型器件的形成方法 |
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