JP5134760B2 - シリコン基板とのエッチング選択比が大きいマスク層を用いたリセスチャンネルアレイトランジスタの製造方法 - Google Patents
シリコン基板とのエッチング選択比が大きいマスク層を用いたリセスチャンネルアレイトランジスタの製造方法 Download PDFInfo
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims description 93
- 229910052710 silicon Inorganic materials 0.000 title claims description 93
- 239000010703 silicon Substances 0.000 title claims description 93
- 239000000758 substrate Substances 0.000 title claims description 76
- 238000005530 etching Methods 0.000 title claims description 72
- 238000004519 manufacturing process Methods 0.000 title claims description 53
- 238000000034 method Methods 0.000 claims description 59
- 238000002955 isolation Methods 0.000 claims description 31
- 238000001020 plasma etching Methods 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- 150000004767 nitrides Chemical class 0.000 claims description 7
- 238000001039 wet etching Methods 0.000 claims description 7
- 238000001312 dry etching Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 105
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 34
- 229920005591 polysilicon Polymers 0.000 description 34
- 239000007789 gas Substances 0.000 description 11
- 229920002120 photoresistant polymer Polymers 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000006117 anti-reflective coating Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
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- 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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/66568—Lateral single gate silicon transistors
- H01L29/66613—Lateral single gate silicon transistors with a gate recessing step, e.g. using local oxidation
- H01L29/66621—Lateral single gate silicon transistors with a gate recessing step, e.g. using local oxidation using etching to form a recess at the gate location
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- 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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28035—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities
- H01L21/28044—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities the conductor comprising at least another non-silicon conductive layer
- H01L21/28061—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor the final conductor layer next to the insulator being silicon, e.g. polysilicon, with or without impurities the conductor comprising at least another non-silicon conductive layer the conductor comprising a metal or metal silicide formed by deposition, e.g. sputter deposition, i.e. without a silicidation reaction
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- 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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
- H01L21/28114—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor characterised by the sectional shape, e.g. T, inverted-T
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/823487—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of vertical transistor structures, i.e. with channel vertical to the substrate surface
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/41—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
- H01L29/42372—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out
- H01L29/42376—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out characterised by the length or the sectional shape
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- Engineering & Computer Science (AREA)
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- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Element Separation (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Semiconductor Memories (AREA)
- Drying Of Semiconductors (AREA)
Description
202 トレンチ
203 ライナー膜
204 分離絶縁膜
206a バッファ絶縁膜パターン
214 シリコンフェンス
216 ポリシリコン層
218 ゲート金属層
220 キャッピング層
222 リセスゲートスタック
224 ソース/ドレイン
226 スペーサ
Claims (12)
- シリコン基板のトレンチに埋め込まれた分離絶縁膜を形成してアクティブ領域を定義する段階と、
前記アクティブ領域が定義された前記シリコン基板上にバッファ絶縁膜を形成する段階と、
前記バッファ絶縁膜上に、前記シリコン基板とのエッチング選択比が大きいマスク層を形成する段階と、
前記マスク層及びバッファ絶縁膜を選択的にエッチングし、前記アクティブ領域及び分離絶縁膜の一部を露出するマスク層パターン及びバッファ絶縁膜パターンを形成する段階と、
前記露出されたアクティブ領域のシリコン基板及び分離絶縁膜をエッチングしてリセスチャンネルトレンチを形成すると共に、前記マスク層パターンの一部を残す段階と、
前記残されたマスク層パターンを除去すると共に、前記トレンチの側壁に形成されたシリコンフェンスを同時に除去する段階と、
前記リセスチャンネルトレンチにゲート絶縁膜及びリセスゲートスタックを形成する段階と、
前記リセスゲートスタックの両側壁のシリコン基板にソース/ドレインを形成する段階と、
を含んでなることを特徴とするリセスチャンネルアレイトランジスタの製造方法。 - 前記マスク層は、シリコン窒化膜であることを特徴とする請求項1に記載のリセスチャンネルアレイトランジスタの製造方法。
- 前記マスク層は、SiON膜またはSiXNY膜であることを特徴とする請求項2に記載のリセスチャンネルアレイトランジスタの製造方法。
- 前記リセスチャンネルトレンチを形成するためのエッチング段階において、前記シリコン基板に対するマスク層パターンのエッチング選択比を3:1とすることを特徴とする請求項1に記載のリセスチャンネルアレイトランジスタの製造方法。
- 前記マスク層パターン及びシリコンフェンスの除去は、化学的乾式エッチング方法または湿式エッチング方法を用いて行うことを特徴とする請求項1に記載のリセスチャンネルアレイトランジスタの製造方法。
- 前記化学的乾式エッチング方法は、CF4、O2、N2及びHFガスの組み合わせガスを用いたプラズマエッチング方式であることを特徴とする請求項5に記載のリセスチャンネルアレイトランジスタの製造方法。
- 前記湿式エッチング方法は、燐酸溶液を用いて行うことを特徴とする請求項5に記載のリセスチャンネルアレイトランジスタの製造方法。
- 前記マスク層及びシリコンフェンスの除去時に、前記バッファ絶縁膜パターンは除去せずに残すことを特徴とする請求項1に記載のリセスチャンネルアレイトランジスタの製造方法。
- シリコン基板にトレンチを形成する段階と、
前記トレンチの内壁にライナー膜を形成する段階と、
前記トレンチのライナー膜上に埋め込まれた分離絶縁膜を形成してアクティブ領域を定義する段階と、
前記アクティブ領域が定義された前記シリコン基板上にバッファ絶縁膜を形成する段階と、
前記バッファ絶縁膜上に、前記シリコン基板とのエッチング選択比が大きいマスク層を形成する段階と、
前記マスク層及びバッファ絶縁膜を選択的にエッチングし、前記アクティブ領域及び分離絶縁膜の一部を露出するマスク層パターン及びバッファ絶縁膜パターンを形成する段階と、
前記露出されたアクティブ領域のシリコン基板及び分離絶縁膜をエッチングしてリセスチャンネルトレンチを形成すると共に、前記マスク層パターンの一部を残す段階と、
前記リセスチャンネルトレンチが形成されたシリコン基板の全面に犠牲絶縁膜を形成し、前記ライナー膜を保護する段階と、
前記残されたマスク層パターンと、前記トレンチの側壁に形成されたシリコンフェンスとを同時に除去する段階と、
前記リセスチャンネルトレンチにゲート絶縁膜及びリセスゲートスタックを形成する段階と、
前記リセスゲートスタックの両側壁のシリコン基板にソース/ドレインを形成する段階と、
を含んでなることを特徴とするリセスチャンネルアレイトランジスタの製造方法。 - 前記ライナー膜は、窒化膜であることを特徴とする請求項9に記載のリセスチャンネルアレイトランジスタの製造方法。
- 前記マスク層パターン及びシリコンフェンスの除去は、燐酸溶液を用いて行うことを特徴とする請求項9に記載のリセスチャンネルアレイトランジスタの製造方法。
- 前記マスク層は、シリコン窒化膜であることを特徴とする請求項9に記載のリセスチャンネルアレイトランジスタの製造方法。
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Application Number | Priority Date | Filing Date | Title |
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KR10-2003-0093682A KR100518606B1 (ko) | 2003-12-19 | 2003-12-19 | 실리콘 기판과 식각 선택비가 큰 마스크층을 이용한리세스 채널 어레이 트랜지스터의 제조 방법 |
KR2003-093682 | 2003-12-19 |
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JP2005183976A JP2005183976A (ja) | 2005-07-07 |
JP5134760B2 true JP5134760B2 (ja) | 2013-01-30 |
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US (1) | US7326621B2 (ja) |
JP (1) | JP5134760B2 (ja) |
KR (1) | KR100518606B1 (ja) |
DE (1) | DE102004060831B4 (ja) |
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KR100615570B1 (ko) * | 2004-07-05 | 2006-08-25 | 삼성전자주식회사 | 둥근 활성코너를 갖는 리세스 채널 모스 트랜지스터의제조방법 |
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KR100518606B1 (ko) | 2005-10-04 |
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