KR100762843B1 - 반도체 소자의 트렌치 절연막 형성 방법 - Google Patents
반도체 소자의 트렌치 절연막 형성 방법 Download PDFInfo
- Publication number
- KR100762843B1 KR100762843B1 KR1020010077268A KR20010077268A KR100762843B1 KR 100762843 B1 KR100762843 B1 KR 100762843B1 KR 1020010077268 A KR1020010077268 A KR 1020010077268A KR 20010077268 A KR20010077268 A KR 20010077268A KR 100762843 B1 KR100762843 B1 KR 100762843B1
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- Prior art keywords
- trench
- silicon
- film
- oxide film
- silicon nitride
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000004065 semiconductor Substances 0.000 title abstract description 13
- 238000002955 isolation Methods 0.000 title abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 53
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 50
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 50
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 27
- 239000010703 silicon Substances 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 238000005530 etching Methods 0.000 claims abstract description 14
- 238000000151 deposition Methods 0.000 claims abstract description 9
- 238000007517 polishing process Methods 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims abstract description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 16
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000005288 electromagnetic effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Classifications
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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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
-
- 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)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Element Separation (AREA)
Abstract
Description
Claims (7)
- 삭제
- 삭제
- 실리콘 기판 위에 패드 산화막과 실리콘 질화막을 각각 증착하는 단계;상기 실리콘 질화막과 상기 패드 산화막과 상기 실리콘 기판을 순차적으로 식각하여 상기 실리콘 기판에 트렌치를 형성하는 단계;상기 실리콘 질화막을 상기 실리콘 기판 상부와 상기 패드 산화막 상부 사이의 단차와 동일한 길이로 트렌치의 바깥쪽으로 축퇴시키는 단계;결과물 전면에 실리콘 산화막을 증착하여 상기 트렌치 내부를 채우는 단계;화학적-기계적 연마 공정을 진행하여 상기 실리콘 산화막의 상부를 평탄화시킴과 동시에 상기 실리콘 질화막 상부로부터 상기 실리콘 산화막을 제거하여 상기 실리콘 산화막이 상기 실리콘 질화막의 축퇴된 길이만큼 상기 트렌치의 바깥쪽으로 연장되는 단계;상기 패드 산화막이 드러나도록 상기 실리콘 질화막을 제거하여 상기 실리콘 산화막 상부와 상기 패드 산화막 상부 사이에 단차가 생기는 단계를 포함하는 트렌치 절연막의 형성 방법.
- 제 3 항에 있어서, 상기 실리콘 질화막의 제거 단계 후에 이루어지는 용매에 의한 세정 단계를 더 포함하며,상기 세정 단계가 이루어지는 동안 상기 트렌치 바깥쪽으로 연장된 상기 실리콘 산화막은 상기 트렌치의 가장자리에 대한 보호막 역할을 수행하는 것을 특징으로 하는 트렌치 절연막의 형성 방법.
- 삭제
- 제 3 항 또는 제 4 항에 있어서, 상기 실리콘 질화막의 축퇴 단계는 등방성 식각에 의하여 이루어지는 것을 특징으로 하는 트렌치 절연막의 형성 방법.
- 제 6 항에 있어서, 상기 등방성 식각은 인산 수용액을 이용하여 이루어지는 것을 특징으로 하는 트렌치 절연막의 형성 방법.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020010077268A KR100762843B1 (ko) | 2001-12-07 | 2001-12-07 | 반도체 소자의 트렌치 절연막 형성 방법 |
Applications Claiming Priority (1)
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---|---|---|---|
KR1020010077268A KR100762843B1 (ko) | 2001-12-07 | 2001-12-07 | 반도체 소자의 트렌치 절연막 형성 방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20030046930A KR20030046930A (ko) | 2003-06-18 |
KR100762843B1 true KR100762843B1 (ko) | 2007-10-08 |
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KR1020010077268A KR100762843B1 (ko) | 2001-12-07 | 2001-12-07 | 반도체 소자의 트렌치 절연막 형성 방법 |
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KR (1) | KR100762843B1 (ko) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001332613A (ja) * | 2000-05-24 | 2001-11-30 | Nec Corp | 半導体装置の製造方法 |
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- 2001-12-07 KR KR1020010077268A patent/KR100762843B1/ko active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001332613A (ja) * | 2000-05-24 | 2001-11-30 | Nec Corp | 半導体装置の製造方法 |
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