KR100518157B1 - 트렌치 dram셀 제조방법 - Google Patents
트렌치 dram셀 제조방법 Download PDFInfo
- Publication number
- KR100518157B1 KR100518157B1 KR1019950031832A KR19950031832A KR100518157B1 KR 100518157 B1 KR100518157 B1 KR 100518157B1 KR 1019950031832 A KR1019950031832 A KR 1019950031832A KR 19950031832 A KR19950031832 A KR 19950031832A KR 100518157 B1 KR100518157 B1 KR 100518157B1
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- South Korea
- Prior art keywords
- layer
- silicon device
- oxide
- soi
- trenches
- Prior art date
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- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/01—Manufacture or treatment
- H10B12/02—Manufacture or treatment for one transistor one-capacitor [1T-1C] memory cells
- H10B12/03—Making the capacitor or connections thereto
- H10B12/038—Making the capacitor or connections thereto the capacitor being in a trench in the substrate
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/01—Manufacture or treatment
- H10B12/02—Manufacture or treatment for one transistor one-capacitor [1T-1C] memory cells
- H10B12/03—Making the capacitor or connections thereto
- H10B12/038—Making the capacitor or connections thereto the capacitor being in a trench in the substrate
- H10B12/0385—Making a connection between the transistor and the capacitor, e.g. buried strap
-
- 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
- H01L21/7624—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using semiconductor on insulator [SOI] technology
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/37—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells the capacitor being at least partially in a trench in the substrate
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/201—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates the substrates comprising an insulating layer on a semiconductor body, e.g. SOI
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Semiconductor Memories (AREA)
- Thin Film Transistor (AREA)
Abstract
Description
Claims (8)
- 트렌치 DRAM 셀을 제조하는 방법으로서,도판트의 소정 표면 농도를 갖는 제 1 전도성으로 실리콘 온 아이솔레이터(SOI) 기판(36)을 도핑하는 단계;상기 기판(36)상에 SOI 산화물층(40)을 형성하는 단계 ;상기 SOI 산화물 층(40)상에 얇은 실리콘 소자층(42)을 형성하는 단계 ;상기 얇은 실리콘 소자층(42)을 상기 제 1 전도성과 반대인 제 2 전도성으로 도핑하는 단계;상기 실리콘 소자층(42)상에 패드 질화물층(50)을 형성하는 단계 ;상기 패드 질화물층(50) 상에 TEOS 에칭 마스크층(52)을 형성하는 단계 ;상기 패드 질화물층(50), 상기 실리콘 소자층(42), 및 상기 SOI 산화물층(40)을 통하여 상기 기판(36)내에 간격을 두고 있는 다수의 깊은 트렌치(44, 46)를 에칭하는 단계 ;다수의 상기 트렌치(44, 46)의 내벽상에 각각 노드 산화물 유전체층(48)을 형성하는 단계 ;상기 TEOS 에칭 마스크층(52)의 상부 레벨까지 상기 다수의 트렌치(44,46)를 각각 상기 제 1 전도성으로 도핑된 폴리실리콘 재료(54)로 채우는 단계 ;상기 TEOS 에칭 마스크층 부분(52)을 제거하는 단계 ;상기 SOI 산화물층(40)의 대략 중간 레벨 부근 아래까지 상기 다수의 트렌치(44, 46)와 관련된 상기 폴리실리콘 재료(54)를 리세스 에칭하는 단계 ;상기 다수의 트렌치들(44, 46) 사이의 상기 실리콘 소자층 부분(42)의 단부로부터 노드 산화물층(37)을 등방성 에칭하는 단계 ;진성의 폴리실리콘 재료(55)로 상기 트렌치(44, 46)의 상부 부분을 다시 채우는 단계 ;상기 실리콘 소자층(42)의 관련된 부분의 중간 레벨 아래까지 상기 진성의 폴리실리콘 재료(55)를 리세스 에칭하는 단계 ;에칭 정지부로서 관련된 아래 놓여있는 SOI 층 부분(40)을 사용하여, 상기 깊은 트렌치(44, 46) 각각의 쌍 사이의 상기 패드 질화물층(50) 및 상기 활성 실리콘 소자층(42)을 에칭하는 단계 ;소정 산화물 두께로 상기 깊은 트렌치의 상기 각각의 쌍과 관련된 폴리실리콘 스터드를 열적으로 산화시키고, 동시에 상기 도핑된 폴리실리콘 재료로부터 각각 위에 놓인 진성의 폴리실리콘 재료(55)를 통해 인접한 실리콘 소자층의 부분속으로 도판트를 외부 확산시켜, 각각 매립 스트랩(56)을 형성하는 단계;상기 실리콘 소자층(42)의 남은 부분 사이의 갭(58)을 화학적 기상 증착(CVD)으로 채우는 단계 ;상기 CVD 산화물(58)을 상기 패드 질화물층 부분(50)까지 평탄화시키는 단계;상기 평탄화 후에 상기 패드 질화물층 부분(50)을 제거하는 단계 ;상기 실리콘 소자층(42)의 남은 부분을 게이트 회생 산화물에 의해 산화시키는 단계 ; 및상기 실리콘 소자층 각각의 남은 부분에 MOS 트랜지스터(60)를 주입하는 단계를 포함하는 것을 특징으로 하는 트렌치 DRAM 셀 제조 방법.
- 제 1 항에 있어서, 상기 기판(36)은 1017/cm3로 도핑되는 것을 특징으로 하는 트렌치 DRAM 셀 제조 방법.
- 제 1 항에 있어서, 상기 SOI 산화물층(40) 부분 바로 아래 8㎛ 지점내에서 약 1020/cm3의 고농도의 도판트 표면 농도를 갖도록 상기 기판을 도핑하는 단계를 더 포함하는 것을 특징으로 하는 트렌치 DRAM 셀 제조 방법.
- 제 1 항에 있어서, 상기 SOI 층(40) 두께는 약 300 나노미터인 것을 특징으로 하는 트렌치 DRAM 셀 제조 방법.
- 제 1 항에 있어서, 상기 실리콘 소자층(42) 두께는 약 100 나노미터인 것을 특징으로 하는 트렌치 DRAM 셀 제조 방법.
- 제 1 항에 있어서, 상기 열산화 단계는 800℃ 내지 1,050℃ 범위의 온도에서 수행되것을 특징으로 하는 트렌치 DRAM 셀 제조 방법.
- 제 1 항에 있어서, 상기 열산화 단계는 약 20nm 두께의 산화물을 제공하도록 수행되는 것을 특징으로 하는 트렌치 DRAM 셀 제조 방법,
- 제 1 항에 있어서, 상기 열산화 단계는 상기 실리콘 소자층 부분(42)으로 100 nm의 외부 확산을 제공하도록 제어되는 것을 특징으로 하는 트렌치 DRAM 셀 제조 방법.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/313,507 | 1994-09-26 | ||
US08/313,507 US5627092A (en) | 1994-09-26 | 1994-09-26 | Deep trench dram process on SOI for low leakage DRAM cell |
Publications (2)
Publication Number | Publication Date |
---|---|
KR960012509A KR960012509A (ko) | 1996-04-20 |
KR100518157B1 true KR100518157B1 (ko) | 2006-06-13 |
Family
ID=23215977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950031832A Expired - Fee Related KR100518157B1 (ko) | 1994-09-26 | 1995-09-26 | 트렌치 dram셀 제조방법 |
Country Status (7)
Country | Link |
---|---|
US (1) | US5627092A (ko) |
EP (1) | EP0703625B1 (ko) |
JP (1) | JP3963970B2 (ko) |
KR (1) | KR100518157B1 (ko) |
AT (1) | ATE268945T1 (ko) |
DE (1) | DE69533121T2 (ko) |
TW (1) | TW288203B (ko) |
Families Citing this family (108)
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- 1995-09-18 AT AT95114657T patent/ATE268945T1/de not_active IP Right Cessation
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- 1995-09-26 JP JP24801795A patent/JP3963970B2/ja not_active Expired - Fee Related
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US5627092A (en) | 1997-05-06 |
DE69533121D1 (de) | 2004-07-15 |
JP3963970B2 (ja) | 2007-08-22 |
ATE268945T1 (de) | 2004-06-15 |
TW288203B (ko) | 1996-10-11 |
JPH08111513A (ja) | 1996-04-30 |
EP0703625B1 (en) | 2004-06-09 |
DE69533121T2 (de) | 2005-07-07 |
EP0703625A2 (en) | 1996-03-27 |
KR960012509A (ko) | 1996-04-20 |
EP0703625A3 (en) | 1999-03-03 |
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