KR100849080B1 - 반도체 소자의 소자분리막 형성방법 - Google Patents
반도체 소자의 소자분리막 형성방법 Download PDFInfo
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- KR100849080B1 KR100849080B1 KR1020020036772A KR20020036772A KR100849080B1 KR 100849080 B1 KR100849080 B1 KR 100849080B1 KR 1020020036772 A KR1020020036772 A KR 1020020036772A KR 20020036772 A KR20020036772 A KR 20020036772A KR 100849080 B1 KR100849080 B1 KR 100849080B1
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- Prior art keywords
- pad oxide
- film
- oxide film
- substrate
- trench
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000004065 semiconductor Substances 0.000 title claims abstract description 23
- 238000002955 isolation Methods 0.000 title claims abstract description 21
- 150000004767 nitrides Chemical class 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 29
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 4
- 238000001039 wet etching Methods 0.000 claims abstract description 4
- 238000005530 etching Methods 0.000 claims description 7
- 238000001312 dry etching Methods 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- -1 HF or HF / H 2 O Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- H—ELECTRICITY
- 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
- H01L21/70—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
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/76224—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials
- H01L21/76232—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials of trenches having a shape other than rectangular or V-shape, e.g. rounded corners, oblique or rounded trench walls
-
- H—ELECTRICITY
- 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 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
-
- H—ELECTRICITY
- 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 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/3086—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
-
- H—ELECTRICITY
- 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 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
- H01L21/30—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
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Plasma & Fusion (AREA)
- Element Separation (AREA)
Abstract
Description
Claims (7)
- 반도체 기판상에 패드 산화막과 질화막을 순차로 형성하는 제1단계;상기 기판 표면이 노출되도록 상기 질화막과 패드 산화막을 선택적으로 제거하는 제2단계;상기 패드 산화막이 수직 방향으로 일부 노출되도록 상기 질화막을 인산을 이용한 습식각으로 일부 제거하는 제3단계;Cl2/Ar/O2 가스의 조합으로 활성화된 플라즈마를 이용하여 상기 노출된 기판 표면을 선택적으로 제거하여 트렌치를 형성함과 병행하여 상기 패드 산화막의 일부 노출된 부분이 라운딩(rounding) 되도록 식각하는 제4단계;상기 트렌치를 매립하도록 상기 기판 전면상에 갭 필 산화막을 형성하는 제5단계;상기 질화막이 노출되도록 상기 갭 필 산화막을 화학적 기계적 연마하여 평탄화시키는 제6단계; 및상기 질화막 및 패드 산화막을 제거하는 제7단계를 포함하는 것을 특징으로 하는 반도체 소자의 소자분리막 형성방법.
- 제1항에 있어서,상기 제2단계는, CHF3/CF4/Ar/O2 가스의 조합으로 활성화된 플라즈마를 이용한 건식각을 진행하는 것을 특징으로 하는 반도체 소자의 소자분리막 형성방법.
- 삭제
- 삭제
- 제1항에 있어서,상기 제4단계는,상기 노출된 기판 표면을 일정 부분 제거하는 단계와 병행하여 상기 패드 산화막의 일부 노출된 부분에 플라즈마 이온을 집중시켜 상기 패드 산화막의 일부 노출된 부분의 상부 모서리를 식각하는 제1코너 라운딩 단계;상기 일정 부분 제거된 기판 표면을 더 깊게 식각하는 단계와 병행하여 상기 패드 산화막의 일부 노출된 부분을 식각하는 제2코너 라운딩 단계; 및상기 기판을 일정 깊이로 제거하여 트렌치를 완성하는 단계와 병행하여 상기 패드 산화막의 일부 노출된 부분을 완전히 식각하는 제3코너 라운딩 단계를 포함하여 이루어지는 것을 특징으로 하는 반도체 소자의 소자분리막 형성방법.
- 삭제
- 제1항에 있어서,제4단계 이후 제5단계 이전에 산화공정으로 라운딩된 부분을 매끄럽게 처리하는 단계를 더 포함하는 것을 특징으로 하는 반도체 소자의 소자분리막 형성방법.
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KR1020020036772A KR100849080B1 (ko) | 2002-06-28 | 2002-06-28 | 반도체 소자의 소자분리막 형성방법 |
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KR1020020036772A KR100849080B1 (ko) | 2002-06-28 | 2002-06-28 | 반도체 소자의 소자분리막 형성방법 |
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KR20040001540A KR20040001540A (ko) | 2004-01-07 |
KR100849080B1 true KR100849080B1 (ko) | 2008-07-30 |
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KR1020020036772A KR100849080B1 (ko) | 2002-06-28 | 2002-06-28 | 반도체 소자의 소자분리막 형성방법 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR960012425A (ko) * | 1994-09-08 | 1996-04-20 | 김주용 | 반도체 소자의 소자 분리막 형성방법 |
KR20000027760A (ko) * | 1998-10-29 | 2000-05-15 | 김영환 | 반도체 소자의 소자분리막 형성방법 |
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- 2002-06-28 KR KR1020020036772A patent/KR100849080B1/ko active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR960012425A (ko) * | 1994-09-08 | 1996-04-20 | 김주용 | 반도체 소자의 소자 분리막 형성방법 |
KR20000027760A (ko) * | 1998-10-29 | 2000-05-15 | 김영환 | 반도체 소자의 소자분리막 형성방법 |
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