JP2022055951A - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 91
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 73
- 239000012535 impurity Substances 0.000 claims abstract description 51
- 150000004767 nitrides Chemical class 0.000 claims abstract description 27
- 239000004020 conductor Substances 0.000 claims abstract description 23
- 230000001133 acceleration Effects 0.000 claims abstract description 15
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 33
- 229920005591 polysilicon Polymers 0.000 claims description 33
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract 2
- 125000006850 spacer group Chemical group 0.000 description 22
- 238000000926 separation method Methods 0.000 description 15
- 238000009792 diffusion process Methods 0.000 description 14
- 239000010410 layer Substances 0.000 description 13
- 238000005530 etching Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 102100039651 Glutathione S-transferase kappa 1 Human genes 0.000 description 1
- 101001034434 Homo sapiens Glutathione S-transferase kappa 1 Proteins 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000002784 hot electron Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
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- H—ELECTRICITY
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- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66825—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a floating gate
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/265—Bombardment with radiation with high-energy radiation producing ion implantation
- H01L21/266—Bombardment with radiation with high-energy radiation producing ion implantation using masks
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32139—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer using masks
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- H—ELECTRICITY
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- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/401—Multistep manufacturing processes
- H01L29/4011—Multistep manufacturing processes for data storage electrodes
- H01L29/40114—Multistep manufacturing processes for data storage electrodes the electrodes comprising a conductor-insulator-conductor-insulator-semiconductor structure
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42324—Gate electrodes for transistors with a floating gate
- H01L29/42328—Gate electrodes for transistors with a floating gate with at least one additional gate other than the floating gate and the control gate, e.g. program gate, erase gate or select gate
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/788—Field effect transistors with field effect produced by an insulated gate with floating gate
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
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- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42324—Gate electrodes for transistors with a floating gate
- H01L29/42332—Gate electrodes for transistors with a floating gate with the floating gate formed by two or more non connected parts, e.g. multi-particles flating gate
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/4234—Gate electrodes for transistors with charge trapping gate insulator
- H01L29/42344—Gate electrodes for transistors with charge trapping gate insulator with at least one additional gate, e.g. program gate, erase gate or select gate
Abstract
Description
11 アクティブ領域
12 素子分離領域
13 ゲート選択トランジスタ
21 ソースプラグ
22 コントロールゲート
23 スペーサ絶縁膜
24 トンネル絶縁膜
25 サイドウォール
26 フローティングゲート
30 半導体基板
31 ノンドープ領域
32 ウェル領域
33 第1拡散層
34 第2拡散層
35 カップリング酸化膜
36 ソースプラグ絶縁膜
37 ノンドープ領域
41 FGポリシリコン膜
42 窒化膜
Claims (3)
- 半導体基板の1の面に酸化膜を形成する工程と、
前記酸化膜上に第1の導体膜を形成する工程と、
前記半導体基板の前記1の面上の前記第1の導体膜が形成された領域から前記半導体基板の内部に向かって、第1の加速エネルギーでP型不純物を注入する工程と、
前記第1の導体膜上に第1の開口部を有する窒化膜を形成する工程と、
前記窒化膜の前記第1の開口部の側面を覆い且つ前記第1の導体膜を露出する第2の開口部を有する絶縁膜を形成する工程と、
前記絶縁膜の前記第2の開口部を埋めるように第2の導体膜を形成する工程と、
前記窒化膜と前記第1の導体膜の前記窒化膜の下部に位置する部分とを除去し、前記半導体基板の前記1の面上の前記絶縁膜の形成領域の周囲において前記酸化膜を露出させる工程と、
前記半導体基板の前記1の面の前記酸化膜が露出した領域から前記半導体基板の内部に向かって、前記第1の加速エネルギーよりも小さい第2の加速エネルギーで前記P型不純物を注入する工程と、
を含むことを特徴とする半導体装置の製造方法。 - 前記絶縁膜を形成する工程と前記第2の導体膜を形成する工程との間に、
前記第2の開口部における前記第1の導体膜を除去する工程と、
前記第2の開口部から前記半導体基板の内部に向かって、N型不純物を注入する工程と、
をさらに含むことを特徴とする請求項1に記載の半導体装置の製造方法。 - 前記第1の導体膜はポリシリコン膜であり、
前記半導体基板はシリコン基板であることを特徴とする請求項1又は2に記載の半導体装置の製造方法。
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JP2020163679A JP2022055951A (ja) | 2020-09-29 | 2020-09-29 | 半導体装置の製造方法 |
US17/476,558 US11894447B2 (en) | 2020-09-29 | 2021-09-16 | Method for manufacturing a semiconductor device with reduced variation of the impurity concentration near the surface of the semiconductor film |
CN202111099036.6A CN114334636A (zh) | 2020-09-29 | 2021-09-18 | 半导体装置的制造方法 |
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JP2020163679A JP2022055951A (ja) | 2020-09-29 | 2020-09-29 | 半導体装置の製造方法 |
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US (1) | US11894447B2 (ja) |
JP (1) | JP2022055951A (ja) |
CN (1) | CN114334636A (ja) |
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JP2022055951A (ja) * | 2020-09-29 | 2022-04-08 | ラピスセミコンダクタ株式会社 | 半導体装置の製造方法 |
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KR100706804B1 (ko) * | 2006-01-23 | 2007-04-12 | 삼성전자주식회사 | 비휘발성 메모리 장치 및 그 형성 방법 |
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JP5106022B2 (ja) * | 2007-09-28 | 2012-12-26 | ルネサスエレクトロニクス株式会社 | 不揮発性半導体記憶装置及びその製造方法 |
JP5289748B2 (ja) * | 2007-10-15 | 2013-09-11 | ルネサスエレクトロニクス株式会社 | 不揮発性半導体記憶装置、不揮発性半導体記憶装置の製造方法 |
JP2011049463A (ja) * | 2009-08-28 | 2011-03-10 | Renesas Electronics Corp | スプリットゲート型不揮発性半導体記憶装置の製造方法、及びスプリットゲート型不揮発性半導体記憶装置 |
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JP2022055951A (ja) * | 2020-09-29 | 2022-04-08 | ラピスセミコンダクタ株式会社 | 半導体装置の製造方法 |
JP2022136388A (ja) * | 2021-03-08 | 2022-09-21 | ラピスセミコンダクタ株式会社 | 半導体装置の製造方法および半導体装置 |
CN113013255B (zh) * | 2021-03-24 | 2024-05-03 | 上海华虹宏力半导体制造有限公司 | 分栅存储器及其制造方法 |
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US11894447B2 (en) | 2024-02-06 |
CN114334636A (zh) | 2022-04-12 |
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