KR100881825B1 - 반도체 소자 및 그 제조 방법 - Google Patents
반도체 소자 및 그 제조 방법 Download PDFInfo
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- KR100881825B1 KR100881825B1 KR1020070075590A KR20070075590A KR100881825B1 KR 100881825 B1 KR100881825 B1 KR 100881825B1 KR 1020070075590 A KR1020070075590 A KR 1020070075590A KR 20070075590 A KR20070075590 A KR 20070075590A KR 100881825 B1 KR100881825 B1 KR 100881825B1
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- 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
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- 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
- H10D86/01—Manufacture or treatment
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- 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
- H10B12/20—DRAM devices comprising floating-body transistors, e.g. floating-body cells
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B99/00—Subject matter not provided for in other groups of this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/711—Insulated-gate field-effect transistors [IGFET] having floating bodies
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- 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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Abstract
Description
Claims (19)
- 플로팅 바디 셀(Floating body cell) 구조를 갖는 반도체 소자에 있어서,반도체 기판 상부에 형성되며, 제 1 및 제 2 도전 라인과 연결되는 튜브 형 채널;상기 튜브 형 채널 내측에 매립되어 상기 반도체 기판과 연결되는 바이어스 전극;상기 튜브 형 채널과 상기 바이어스 전극 사이에 위치하는 절연막; 및상기 튜브 형 채널 외측에 형성되는 써라운드 게이트(Surrounding gate) 전극을 포함하며,상기 제 1 도전 라인은 상기 튜브 형 채널의 하부와 연결되는 것을 특징으로 하는 반도체 소자.
- 제 1항에 있어서,상기 튜브 형 채널은 수직형 기둥 형태인 것을 특징으로 하는 반도체 소자.
- 제 1항에 있어서,상기 제 2 도전 라인은 상기 튜브 형 채널의 상부와 연결되는 것을 특징으로 하는 반도체 소자.
- 제 1항에 있어서,상기 튜브 형 채널의 상부면은 원형이나 다각형인 것을 특징으로 하는 반도체 소자.
- 반도체 기판 상부에 도전성 필러(Pillar)를 형성하는 단계;상기 도전성 필러의 내측과 그 하부의 상기 반도체 기판의 일부를 식각하여 도전성 튜브를 형성하는 단계;상기 도전성 튜브의 내부 측벽에 절연막을 형성하는 단계;상기 도전성 튜브를 매립하며, 그 하부의 상기 반도체 기판과 연결되는 바이어스 전극을 형성하는 단계;상기 반도체 기판과 상기 도전성 튜브 사이에 제 1 도전 라인을 더 형성하는 단계;상기 도전성 튜브의 외부 측벽에 게이트 절연막을 형성하는 단계; 및상기 게이트 절연막 상부에 써라운드 게이트(Surrounding gate) 전극을 형성하는 단계를 포함하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 5항에 있어서,상기 도전성 필러를 형성하는 단계는,상기 반도체 기판 상부에 도전층을 형성하는 단계;상기 도전층 상부에 하드 마스크층을 형성하는 단계;활성 영역 마스크로 상기 하드 마스크층을 선택 식각하여 하드 마스크층 패턴을 형성하는 단계;상기 하드 마스크층 패턴의 측벽에 스페이서를 형성하는 단계; 및상기 하드 마스크층 패턴 및 상기 스페이서를 식각 마스크로 상기 도전층을 선택 식각하여 상기 도전성 필러를 형성하는 단계를 포함하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 6항에 있어서,상기 도전층은 p형 또는 언도프트 실리콘층으로 형성하며, 그 두께는 500~5,000Å인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 6항에 있어서,상기 도전층은 실리콘층 성장 시 보론(B)을 주입하여 형성하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 6항에 있어서,상기 하드 마스크층은 산화막, 실리콘 질화막 및 이들의 조합으로 이루어진 그룹중 선택된 어느 하나로 형성하며, 그 두께는 500~5,000Å인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 6항에 있어서,상기 스페이서는 실리콘 질화막으로 형성하며, 그 두께는 100~500Å인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 6항에 있어서,상기 활성 영역 마스크는 원형이나 다각형인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 5항에 있어서,상기 절연막은 실리콘 산화막으로 형성하며, 그 두께는 1~100nm인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 5항에 있어서,상기 바이어스 전극은 단결정 실리콘층, 다결정 실리콘층, 티타늄 질화(TiN)막, 탄탈늄 질화(TaN)막, 텅스텐(W)층 및 이들의 조합으로 이루어진 그룹으로부터 선택된 어느 하나로 형성하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 5항에 있어서,상기 게이트 절연막은 실리콘 산화막, 하프늄 산화막, 알루미늄 산화막, 지르코늄 산화막, 하프늄실리콘 질화산화막, 실리콘 질화막 및 이들의 조합으로 이루어진 그룹으로부터 선택된 어느 하나로 형성하며, 그 두께는 1~100nm인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 5항에 있어서,상기 게이트 전극은 다결정 실리콘, 티타늄(Ti)층, 티타늄 질화(TiN)막, 탄탈륨 질화(TaN)막, 텅스텐(W)층, 알루미늄(Al)층, 구리(Cu)층, 텅스텐 실리사이드(WSix)층 및 이들의 조합으로 이루어진 일군으로부터 선택된 어느 하나로 형성하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 5항에 있어서,상기 도전성 튜브의 상부와 연결되는 제 2 도전 라인을 형성하는 단계를 더 포함하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 5항에 있어서,상기 도전성 튜브는 수직형 기둥 형태인 것을 특징으로 하는 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 17항에 있어서,상기 제 1 도전 라인은 실리콘 성장 방법을 이용하여 실리콘 단결정층으로 형성하며, 그 두께는 100~5,000Å인 것을 특징으로 하는 반도체 소자의 제조 방법.
- 제 17항에 있어서,상기 제 1 도전 라인은 실리콘 성장 시 포스핀(PH3)을 주입하여 n형 실리콘 단결정층으로 형성하는 것을 특징으로 하는 반도체 소자의 제조 방법.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020070075590A KR100881825B1 (ko) | 2007-07-27 | 2007-07-27 | 반도체 소자 및 그 제조 방법 |
US11/866,950 US7663188B2 (en) | 2007-07-27 | 2007-10-03 | Vertical floating body cell of a semiconductor device and method for fabricating the same |
TW096137957A TWI353061B (en) | 2007-07-27 | 2007-10-11 | Vertical floating body cell of a semiconductor dev |
CN2007101632475A CN101355085B (zh) | 2007-07-27 | 2007-10-19 | 半导体器件的竖直浮体单元及其制造方法 |
JP2008103016A JP2009033103A (ja) | 2007-07-27 | 2008-04-11 | 半導体素子及びその製造方法 |
US12/705,513 US7943444B2 (en) | 2007-07-27 | 2010-02-12 | Vertical floating body cell of a semiconductor device and method for fabricating the same |
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KR1020070075590A KR100881825B1 (ko) | 2007-07-27 | 2007-07-27 | 반도체 소자 및 그 제조 방법 |
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Cited By (1)
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CN101355085B (zh) | 2010-12-01 |
TWI353061B (en) | 2011-11-21 |
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US7943444B2 (en) | 2011-05-17 |
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