KR100853900B1 - 메모리 장치, 트랜지스터, 메모리 셀과, 메모리 장치를 형성하기 위한 방법 - Google Patents
메모리 장치, 트랜지스터, 메모리 셀과, 메모리 장치를 형성하기 위한 방법 Download PDFInfo
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Abstract
Description
4H-SiC | 6H-SiC | 실리콘 | |
밴드 갭 에너지(eV) | 3.26 | 3.03 | 1.12 |
최대 드리프트 속도(E=2x105V/cm에서의 cm/sec) | 2.0x10' | 2.0x10' | 1.0x10' |
열 전도도(300K에서의 Wcm-K) | 3.0-3.8 | 3.0-3.8 | 1.5 |
항복 전기장(V/cm) | 2.2x106 | 2.4x105 | 0.25x105 |
Claims (75)
- 반도성 기판,상기 기판 위에 형성되는 메모리 셀(memory cell)의 어레이로서, 개별 메모리 셀의 일부, 또는 전체가 SiC를 내포하는 반도성 기판의 탄화 부분(carbonated portion)을 포함하는 상기 메모리 셀의 어레이, 그리고상기 기판 위에서 메모리 셀 어드레싱 회로와 메모리 셀 판독 회로를 포함하는 주변 장치로서, 상기 반도성 기판의 탄화 부분을 전혀 포함하지 않는 상기 주변 장치를 포함하는 것을 특징으로 하는 메모리 장치.
- 제 1 항에 있어서, 상기 탄화 부분은 전도성 도핑되는 것을 특징으로 하는 메모리 장치.
- 제 1 항에 있어서, 각각의 개별 메모리 셀의 하나 이상의 컴포넌트가 탄화 부분의 하나를 포함하는 것을 특징으로 하는 메모리 장치.
- 제 1 항에 있어서, 주변 장치 중 어느 것도 상기 탄화 부분을 포함하지 않는 것을 특징으로 하는 메모리 장치.
- 제 1 항에 있어서, 상기 개별 메모리 셀 중 일부, 또는 전체가, 반도성 기판과 트랜지스터에서 평면 SiC 층을 포함하고, 상기 트랜지스터가 제 1 소스/드레인과, 제 2 소스/드레인과, 상기 제 1 소스/드레인과 제 2 소스/드레인 사이에 위치하는 채널을 포함하는 것을 특징으로 하는 메모리 장치.
- 제 1 항에 있어서, 개별 메모리 셀의 일부, 또는 전체가 트랜지스터를 포함하며, 이때 상기 트랜지스터는제 1 소스/드레인,제 2 소스/드레인,상기 제 1 소스/드레인과 제 2 소스/드레인 사이에 위치하는 탄화 부분 중 하나를 포함하는 채널,상기 채널의 마주보는 측부와 기능적으로 연계되어 있는 게이트를 포함하는 것을 특징으로 하는 메모리 장치.
- 제 1 항에 있어서, 개별 메모리 셀의 일부, 또는 전체가 트랜지스터를 포함하며, 상기 트랜지스터는제 1 소스/드레인,제 2 소스/드레인,상기 제 1 소스/드레인과 상기 제 2 소스/드레인 사이에서, 전도성 기판으로 오목하게 형성되는 게이트,상기 게이트의 마주보는 측부와 기능적으로 연계되어 있는 탄화 부분 중 하나를 포함하는 채널을 포함하는 것을 특징으로 하는 메모리 장치.
- 제 1 항에 있어서, 개별 메모리 셀의 일부, 또는 전체가반도성 기판 내에 위치하는 제 1 트랜지스터 소스/드레인 영역,반도성 기판 내에 위치하는 제 2 트랜지스터 소스/드레인 영역,상기 제 1 소스/드레인 영역과 상기 제 2 소스/드레인 영역 사이에서 위치하는 SiC를 내포하지 않는 트랜지스터 채널, 그리고상기 제 1 소스/드레인 영역 상의 저장 노드 접합부(storage node junction)와, 상기 제 2 소스/드레인 영역 상의 디지트 노드 접합부(digit node junction)로서, 탄화 부분을 포함하는 상기 제 1 소스/드레인 영역 상의 저장 노드 접합부와, 상기 제 2 소스/드레인 영역 상의 디지트 노드 접합부를 포함하는 것을 특징으로 하는 메모리 장치.
- 제 8 항에 있어서, 상기 저장 노드 접합부가 탄화 부분을 포함할 경우, 상기 SiC는 200옹스트롬 내지 500옹스트롬의 두께를 갖고, 상기 디지트 노드 접합부가 탄화 부분을 포함할 경우, 상기 SiC는 50옹스트롬 내지 150옹스트롬의 두께를 갖는 것을 특징으로 하는 메모리 장치.
- 제 8 항에 있어서, 상기 저장 노드 접합부, 또는 디지트 노드 접합부는, 각각의 소스/드레인 영역의 에피택시 실리콘 상에 위치하는 탄화 부분을 포함하며, 상기 에피택시 실리콘은 상기 채널 위에서 형성되는 것을 특징으로 하는 메모리 장치.
- 제 1 항에 있어서, 랜덤 액세스 메모리 장치를 포함하며, 이때반도성 기판으로서의 실리콘 기판,실리콘 기판의 탄화 부분으로서 전도성 도핑된 평면 SiC 층을 포함하고, 제 1 소스/드레인과 제 2 소스/드레인과, 상기 제 1 소스/드레인과 제 2 소스/드레인 사이의 채널에서 SiC를 포함하는 각각의 개별 메모리 셀, 그리고상기 실리콘 기판에서 어떠한 SiC 층도 포함하지 않는 주변 장치를 포함하는 것을 특징으로 하는 메모리 장치.
- 제 1 항 내지 제 11 항 중 어느 한 항에 있어서, 상기 반도성 기판은 단결정 실리콘을 포함하는 것을 특징으로 하는 메모리 장치.
- 제 1 항 내지 제 11 항 중 어느 한 항에 있어서, 상기 반도성 기판은 에피택시 실리콘을 포함하는 것을 특징으로 하는 메모리 장치.
- 반도성 기판,제 1 소스/드레인.제 2 소스/드레인,상기 제 1 소스/드레인과 상기 제 2 소스/드레인 사이에 위치하는 SiC를 내포하는 반도성 기판의 탄화 부분을 포함하는 채널,상기 채널의 마주보는 측부와 기능적으로 연계되어 있는 게이트를 포함하는 것을 특징으로 하는 트랜지스터.
- 제 14 항에 있어서, 상기 트랜지스터는, 상기 제 1 소스/드레인 위에 위치하는 채널과, 상기 채널 위에 위치하는 제 2 소스/드레인을 갖는 수직 트랜지스터를 포함하는 것을 특징으로 하는 트랜지스터.
- 제 14 항에 있어서, 상기 트랜지스터는 하나의 공통 공정 높이를 공유하는, 제 1 소스/드레인과, 제 2 소스/드레인과, 게이트와, 상기 채널을 통과하는 전류 경로를 갖는 횡방향 트랜지스터를 포함하는 것을 특징으로 하는 트랜지스터.
- 제 14 항에 있어서, 게이트와 채널 사이에서 게이트 유전체를 더 포함하며, 상기 채널의 SiC는 게이트 유전체와의 경계부와 인접하는 채널 주변부 내에 위치하며, SiC에 의해 부분적으로 감싸여 있는 채널 코어 내부에서는 위치하지 않으며, 상기 채널 코어는 제 1 소스/드레인에서 제 2 소스/드레인까지 뻗어 있는 것을 특징으로 하는 트랜지스터.
- 제 17 항에 있어서, SiC는 50옹스트롬 내지 100옹스트롬의 두께를 가지는 것을 특징으로 하는 트랜지스터.
- 제 14 항에 있어서, 상기 트랜지스터는 메모리 장치에 포함되는 것을 특징으로 하는 트랜지스터.
- 반도성 기판,제 1 소스/드레인,제 2 소스/드레인,상기 제 1 소스/드레인과 제 2 소스/드레인 사이에 위치하는 반도성 기판으로 오목하게 형성된 게이트,게이트의 마주보는 측부와 기능적으로 연계되어 있는 SiC를 포함하는 반도성 기판의 탄화 부분을 포함하는 채널을 포함하는 것을 특징으로 하는 트랜지스터.
- 제 20 항에 있어서, 상기 게이트와 상기 채널 사이의 게이트 유전체를 더 포함하며, 상기 채널의 SiC는 상기 게이트 유전체와의 경계부에 인접하는 채널 주변부내에 위치하는 것을 특징으로 하는 트랜지스터.
- 제 21 항에 있어서, 상기 SiC는 50옹스트롬 내지 100옹스트롬의 두께를 갖는 것을 특징으로 하는 트랜지스터.
- 제 20 항에 있어서, 상기 트랜지스터는 메모리 장치에 포함되는 것을 특징으로 하는 트랜지스터.
- 제 19 항 또는 제 23 항에 있어서, 상기 트랜지스터는 DRAM, 또는 SRAM, 또는 플래시 메모리에 포함되는 것을 특징으로 하는 트랜지스터.
- 반도성 기판,상기 반도성 기판 내에 위치하는 제 1 트랜지스터 소스/드레인 영역,상기 반도성 기판 내에 위치하는 제 2 트랜지스터 소스/드레인 영역,상기 제 1 소스/드레인 영역과 상기 제 2 소스/드레인 영역 사이에서, SiC를 내포하지 않는 트랜지스터 채널,상기 제 1 소스/드레인 영역 상의 저장 노드 접합부와, 상기 제 2 소스/드레인 영역 상의 디지트 노드 접합부로서, SiC를 내포하는 반도성 기판의 탄화 부분을 포함하는 상기 저장 노드 접합부와 디지트 노드 접합부를 포함하는 것을 특징으로 하는 메모리 셀.
- 제 25 항에 있어서, 상기 저장 노드 접합부가 SiC를 포함할 경우, SiC는 200옹스트롬 내지 500옹스트롬의 두께를 가지며, 상기 디지트 노드 접합부가 SiC를 포함할 경우, SiC는 50옹스트롬 내지 150옹스트롬의 두께를 갖는 것을 특징으로 하는 메모리 셀.
- 제 25 항에 있어서, SiC를 포함하는 저장, 또는 디지트 노드 접합부는 각각의 소스/드레인 영역의 에피택시 실리콘 상에 위치하고, 상기 에피택시 실리콘은 상기 채널 위에 위치하는 것을 특징으로 하는 메모리 셀.
- 제 1 항 내지 제 11 항 중 어느 한 항에 따르는 메모리 장치를 형성하기 위한 방법에 있어서, 상기 방법은 상기 탄화 부분을 형성하는 단계를 포함하고, 상기 탄화 부분을 형성하는 단계는메모리 어레이 영역 위에 마스킹 층을 형성하고, 반도성 기판의 주변 장치 영역을 형성하는 단계,상기 메모리 어레이 영역 위로부터 상기 마스킹 층을 제거하는 단계,메모리 어레이 영역과 접촉하여, 그러나 주변 장치 영역과는 접촉하지 않고 SiC 층을 형성하는 단계,상기 주변 장치 영역 위로부터 마스킹 층을 제거하는 단계를 포함하는 것을 특징으로 하는 메모리 장치를 형성하기 위한 방법.
- 제 28 항에 있어서, 상기 마스킹 층은 실리콘 니트라이드를 포함하는 것을 특징으로 하는 메모리 장치를 형성하기 위한 방법.
- 제 1 항 내지 제 11 항 중 어느 한 항에 따르는 메모리 장치를 형성하기 위한 방법에 있어서, 상기 방법은 상기 탄화 부분을 형성하는 단계를 포함하고, 상기 탄화 부분을 형성하는 단계는반도성 기판의 메모리 어레이 영역과 주변 장치 영역과 접촉하여 SiC 층을 형성하는 단계,SiC 층을 주변 장치 영역으로부터 제거하고, 상기 메모리 어레이 영역의 부분, 또는 전체 상에서 SiC 층을 남겨두는 단계를 포함하는 것을 특징으로 하는 메모리 장치를 형성하기 위한 방법.
- 제 1 항 내지 제 11 항 중 어느 한 항에 따르는 메모리 장치를 형성하기 위한 방법에 있어서, 상기 방법은 상기 탄화 부분을 형성하는 단계를 포함하고, 상기 탄화 부분을 형성하는 단계는 상기 반도성 기판 위에 위치하는 SiC 에피택시 성장을 포함하는 것을 특징으로 하는 메모리 장치를 형성하기 위한 방법.
- 제 1 항 내지 제 11 항 중 어느 한 항에 따르는 메모리 장치를 형성하기 위한 방법에 있어서, 상기 방법은 상기 탄화 부분을 형성하는 단계를 포함하고, 상기 탄화 부분을 형성하는 단계는, 상기 반도성 기판으로의 이온 임플랜팅, 또는 탄소 기체 확산 공정을 포함하는 것을 특징으로 하는 메모리 장치를 형성하기 위한 방법.
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US20060022239A1 (en) | 2006-02-02 |
US7598134B2 (en) | 2009-10-06 |
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TWI303489B (en) | 2008-11-21 |
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US8080837B2 (en) | 2011-12-20 |
US20130248885A1 (en) | 2013-09-26 |
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