JP5190250B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5190250B2 JP5190250B2 JP2007286228A JP2007286228A JP5190250B2 JP 5190250 B2 JP5190250 B2 JP 5190250B2 JP 2007286228 A JP2007286228 A JP 2007286228A JP 2007286228 A JP2007286228 A JP 2007286228A JP 5190250 B2 JP5190250 B2 JP 5190250B2
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- 239000004065 semiconductor Substances 0.000 title claims description 151
- 239000000758 substrate Substances 0.000 claims description 87
- 229910052751 metal Inorganic materials 0.000 claims description 46
- 239000002184 metal Substances 0.000 claims description 46
- 238000002955 isolation Methods 0.000 claims description 43
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 32
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 32
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 6
- 239000010408 film Substances 0.000 description 322
- 230000015572 biosynthetic process Effects 0.000 description 78
- 238000000034 method Methods 0.000 description 46
- 229910052581 Si3N4 Inorganic materials 0.000 description 40
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 40
- 238000004519 manufacturing process Methods 0.000 description 38
- 239000012535 impurity Substances 0.000 description 26
- 238000001039 wet etching Methods 0.000 description 23
- 238000005530 etching Methods 0.000 description 22
- 238000012986 modification Methods 0.000 description 20
- 230000004048 modification Effects 0.000 description 19
- 230000008569 process Effects 0.000 description 19
- 239000010410 layer Substances 0.000 description 15
- 230000003647 oxidation Effects 0.000 description 15
- 238000007254 oxidation reaction Methods 0.000 description 15
- KRHYYFGTRYWZRS-UHFFFAOYSA-N hydrofluoric acid Substances F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 14
- 238000005229 chemical vapour deposition Methods 0.000 description 9
- 238000001312 dry etching Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 8
- 238000007796 conventional method Methods 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 238000005468 ion implantation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910006501 ZrSiO Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
- H10D84/0135—Manufacturing their gate conductors
- H10D84/014—Manufacturing their gate conductors the gate conductors having different materials or different implants
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- H01L21/28008—Making conductor-insulator-semiconductor electrodes
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- H01L21/28026—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon characterised by the conductor
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- H10D64/68—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator
- H10D64/693—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes characterised by the insulator, e.g. by the gate insulator the insulator comprising nitrogen, e.g. nitrides, oxynitrides or nitrogen-doped materials
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- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
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- H10D84/01—Manufacture or treatment
- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
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- H10D84/01—Manufacture or treatment
- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
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- H10D84/03—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology
- H10D84/038—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology using silicon technology, e.g. SiGe
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- H10D84/80—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00, e.g. integration of IGFETs
- H10D84/82—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00, e.g. integration of IGFETs of only field-effect components
- H10D84/83—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00, e.g. integration of IGFETs of only field-effect components of only insulated-gate FETs [IGFET]
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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 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
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Description
以下に、本発明の一実施形態の変形例1及び変形例2について、図面を参照しながら説明する。本変形例1及び変形例2では、上述した実施形態における高電圧系トランジスタ形成領域Bのシリコン窒化膜7を除去する工程に関して、上述とは異なる工程を採用するものであって、上述した実施形態では生じ得る以下の事態を考慮したものである。すなわち、上述した実施形態における図2(d)に示す工程において、薄膜のゲート絶縁膜5をエッチングストップ膜として用いて、シリコン窒化膜7をドライエッチングにより除去する際に、薄膜のゲート絶縁膜5及びシリコン窒化膜7のエッチング選択比を十分に大きく取れない場合には、シリコン窒化膜7のウエハ面内における膜厚バラツキ、又は、薄膜のゲート絶縁膜5のウエハ面内における膜厚バラツキが大きくなり、ドライエッチング時にウエハ面内の一部領域において薄膜のゲート絶縁膜5が削り取られてしまうことが想定される。そうなると、高電圧系トランジスタ形成領域における半導体基板1bの表面がドライエッチングに曝されてしまうために、半導体基板1bの表面に荒れが生じて、高電圧系トランジスタの特性バラツキが大きくなったり、信頼性が損なわれたりすることが予想される。
以下に、本発明の一実施形態の変形例1に係る半導体装置及びその製造方法について説明する。なお、本変形例1では、以下で説明するように、高電圧系トランジスタ形成領域Bにおけるシリコン窒化膜7をウエットエッチングにより除去するものであって、シリコン窒化膜7の除去方法のプロセスマージンを広げるものである。
以下に、本発明の一実施形態の変形例2に係る半導体装置及びその製造方法について説明する。なお、本変形例2では、以下で説明するように、金属膜6をエッチングストップ膜として用いて、高電圧系トランジスタ形成領域Bにおけるシリコン窒化膜7をドライエッチングにより除去するものである。
B 高電圧系トランジスタ形成領域
1a、1b 半導体基板
2 犠牲酸化膜
3 素子分離領域
4a、4b 不純物層
5 薄膜のゲート絶縁膜
6 金属膜
7 シリコン窒化膜
8 厚膜のゲート絶縁膜
9 多結晶シリコン膜
11 シリコン酸化膜
51〜55 レジストパターン
d1 半導体基板表面の後退量
h 素子分離領域上の段差
s1 素子分離領域における窪み量
s2 素子分離領域における窪み量
t1 薄膜のゲート絶縁膜の膜厚
t2 厚膜のゲート絶縁膜の膜厚
101a、101b 半導体基板
102 犠牲酸化膜
103 素子分離領域
104a、104b 不純物層
105 厚膜のゲート絶縁膜
106 レジストマスク
107 薄膜のゲート絶縁膜
108 多結晶シリコン膜
d101 半導体基板表面の後退量
d102 半導体基板表面の後退量
Claims (6)
- 半導体基板における第1の領域上に形成された第1のMIS型トランジスタと、前記半導体基板における前記第1の領域とは異なる第2の領域に形成された第2のMIS型トランジスタとを有する半導体装置であって、
前記第1のMIS型トランジスタは、
前記第1の領域上に形成された第1のゲート絶縁膜と、
前記第1のゲート絶縁膜上に、金属膜及び多結晶シリコン膜が下から順に形成されてなる第1のゲート電極とを含み、
前記第2のMIS型トランジスタは、
前記第2の領域上に形成された第2のゲート絶縁膜と、
前記第2のゲート絶縁膜上に形成された多結晶シリコン膜からなる第2のゲート電極とを含み、
前記第1のゲート絶縁膜の等価酸化膜厚は、前記第2のゲート絶縁膜の等価酸化膜厚よりも薄く、
前記第1の領域における前記半導体基板の表面高さは、前記第2の領域における前記半導体基板の表面高さよりも高く、
前記第1のMIS型トランジスタ及び前記第2のMIS型トランジスタは、同一の導電型のトランジスタである、半導体装置。 - 請求項1に記載の半導体装置において、
前記第1のゲート絶縁膜は、シリコン酸化膜の比誘電率よりも高い比誘電率を有する絶縁膜を含んでいる、半導体装置。 - 請求項1又は2に記載の半導体装置において、
前記第2のゲート絶縁膜は、シリコン酸化膜からなる、半導体装置。 - 請求項1〜3のうちのいずれか1項に記載の半導体装置において、
前記半導体基板に、前記第1の領域及び前記第2の領域の各々を区画すると共に前記第1の領域と前記第2の領域とを電気的に分離するように形成された素子分離領域をさらに備え、
前記第1の領域と前記第2の領域との境界において、前記第1の領域側の前記素子分離領域の高さは、前記第2の領域側の前記素子分離領域の高さよりも高い、半導体装置。 - 請求項1〜4のうちのいずれか1項に記載の半導体装置において、
前記半導体基板に、前記第1の領域及び前記第2の領域の各々を区画すると共に前記第1の領域と前記第2の領域とを電気的に分離するように形成された素子分離領域をさらに備え、
前記第1の領域における前記素子分離領域に形成された窪み量は、前記第2の領域における前記素子分離領域に形成された窪み量よりも小さい、半導体装置。 - 請求項1〜5のうちのいずれか1項に記載の半導体装置において、
前記第1のMIS型トランジスタは、低電圧系トランジスタであり、
前記第2のMIS型トランジスタは、高電圧系トランジスタである、半導体装置。
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JP2007286228A JP5190250B2 (ja) | 2007-11-02 | 2007-11-02 | 半導体装置 |
US12/261,431 US20090114998A1 (en) | 2007-11-02 | 2008-10-30 | Semiconductor device and method for fabricating same |
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JP2007286228A JP5190250B2 (ja) | 2007-11-02 | 2007-11-02 | 半導体装置 |
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JP5190250B2 true JP5190250B2 (ja) | 2013-04-24 |
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US8999829B2 (en) * | 2012-10-19 | 2015-04-07 | Applied Materials, Inc. | Dual gate process |
US9972678B2 (en) * | 2016-10-06 | 2018-05-15 | United Microelectronics Corp. | Semiconductor device and method of forming the same |
JP6981601B2 (ja) * | 2018-05-29 | 2021-12-15 | 住友電工デバイス・イノベーション株式会社 | 半導体装置の製造方法 |
TWI755729B (zh) * | 2020-05-08 | 2022-02-21 | 力晶積成電子製造股份有限公司 | 積體電路及其製造方法 |
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JP2001308198A (ja) * | 2000-04-27 | 2001-11-02 | Ricoh Co Ltd | 半導体装置及びその製造方法 |
KR100450666B1 (ko) * | 2001-09-03 | 2004-10-01 | 삼성전자주식회사 | 선택적 실리사이드막의 형성 방법 및 이를 구비한 반도체소자 |
JP4257055B2 (ja) * | 2001-11-15 | 2009-04-22 | 株式会社ルネサステクノロジ | 半導体集積回路装置の製造方法 |
KR20040010303A (ko) * | 2002-07-23 | 2004-01-31 | 가부시끼가이샤 도시바 | 반도체 장치 및 그 제조 방법, 불휘발성 반도체 기억 장치및 그 제조 방법, 및 불휘발성 반도체 기억 장치를구비하는 전자 장치 |
US6670248B1 (en) * | 2002-08-07 | 2003-12-30 | Chartered Semiconductor Manufacturing Ltd. | Triple gate oxide process with high-k gate dielectric |
JP3770250B2 (ja) * | 2003-05-26 | 2006-04-26 | セイコーエプソン株式会社 | 半導体装置の製造方法 |
JP4277268B2 (ja) * | 2003-11-28 | 2009-06-10 | ローム株式会社 | 金属化合物薄膜の製造方法、ならびに当該金属化合物薄膜を含む半導体装置の製造方法 |
US7229893B2 (en) * | 2004-06-23 | 2007-06-12 | Taiwan Semiconductor Manufacturing Company, Ltd. | Method and apparatus for a semiconductor device with a high-k gate dielectric |
JP4134001B2 (ja) * | 2004-10-29 | 2008-08-13 | 富士通株式会社 | 半導体装置の製造方法 |
JP2006222203A (ja) * | 2005-02-09 | 2006-08-24 | Renesas Technology Corp | 半導体装置およびその製造方法 |
JP2006245167A (ja) * | 2005-03-02 | 2006-09-14 | Toshiba Corp | 半導体装置及びその製造方法 |
JP4551795B2 (ja) * | 2005-03-15 | 2010-09-29 | Okiセミコンダクタ株式会社 | 半導体装置の製造方法 |
KR100697694B1 (ko) * | 2005-08-02 | 2007-03-20 | 삼성전자주식회사 | 듀얼 게이트를 갖는 반도체 장치 및 그 제조 방법 |
JP2007088122A (ja) * | 2005-09-21 | 2007-04-05 | Renesas Technology Corp | 半導体装置 |
JP2007288096A (ja) * | 2006-04-20 | 2007-11-01 | Matsushita Electric Ind Co Ltd | 半導体装置及びその製造方法 |
-
2007
- 2007-11-02 JP JP2007286228A patent/JP5190250B2/ja not_active Expired - Fee Related
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2008
- 2008-10-30 US US12/261,431 patent/US20090114998A1/en not_active Abandoned
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US20090114998A1 (en) | 2009-05-07 |
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