KR100725370B1 - 반도체 장치의 제조 방법 및 그에 의해 제조된 반도체 장치 - Google Patents
반도체 장치의 제조 방법 및 그에 의해 제조된 반도체 장치 Download PDFInfo
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- KR100725370B1 KR100725370B1 KR1020060001384A KR20060001384A KR100725370B1 KR 100725370 B1 KR100725370 B1 KR 100725370B1 KR 1020060001384 A KR1020060001384 A KR 1020060001384A KR 20060001384 A KR20060001384 A KR 20060001384A KR 100725370 B1 KR100725370 B1 KR 100725370B1
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000000758 substrate Substances 0.000 claims abstract description 44
- 238000005530 etching Methods 0.000 claims abstract description 23
- 230000000903 blocking effect Effects 0.000 claims abstract description 15
- 125000006850 spacer group Chemical group 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 229910021332 silicide Inorganic materials 0.000 claims description 15
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052715 tantalum Inorganic materials 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000000151 deposition Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910003811 SiGeC Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
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- 238000004806 packaging method and process Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
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Abstract
Description
Claims (19)
- 반도체 기판의 일부를 식각하여 필라형 액티브 영역을 형성하고,상기 필라형 액티브 영역의 하단부 측벽을 선택적으로 노출시키는 블록킹막을 형성하고,상기 노출된 필라형 액티브 영역의 하단부 측벽에 선택적으로 비트라인을 형성하는 것을 포함하는 반도체 장치의 제조 방법.
- 제1항에 있어서, 상기 필라형 액티브 영역을 형성하는 것은상기 반도체 기판을 소정의 깊이로 1차 식각하고,상기 1차 식각된 영역의 측벽에 스페이서를 형성하고,상기 스페이서를 식각 마스크로 하여 상기 반도체 기판을 2차 식각하여 상기 필라형 액티브 영역을 완성하는 것을 포함하는 반도체 장치의 제조 방법.
- 제2항에 있어서,상기 스페이서를 형성하기 전에 상기 1차 식각된 영역의 외벽을 일부 리세스하는 것을 포함하는 반도체 장치의 제조 방법.
- 제2항에 있어서, 상기 2차 식각은상기 스페이서를 식각 마스크로 하여 상기 반도체 기판을 이방성 식각하고,상기 이방성 식각된 결과물의 측벽에 식각 방지막을 형성하고,상기 이방성 식각된 결과물의 저면을 등방성 식각하여 상기 필라형 액티브 영역의 하단부를 구형으로 형성하는 것을 포함하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 비트라인을 형성하기 전 또는 후에 상기 필라형 액티브 영역에 트랜지스터를 형성하는 것을 포함하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 비트라인을 형성하기 전에 상기 필라형 액티브 영역의 측벽에 게이트 절연막 및 게이트 전극을 형성하고,상기 비트라인을 형성한 후에 불순물을 주입하여 상기 필라형 액티브 영역 내에 소스 및 드레인 영역을 형성하는 것을 포함하는 반도체 장치의 제조 방법.
- 제1항에 있어서,상기 트랜지스터를 형성하는 것은 상기 비트라인을 형성하기 전에 상기 필라형 액티브 영역 내에 소스 및 드레인 영역을 형성하고,상기 비트라인을 형성한 후에 상기 필라형 액티브 영역의 측벽에 게이트 절연막 및 게이트 전극을 형성하는 것을 포함하는 반도체 장치의 제조 방법.
- 제1항에 있어서, 상기 비트라인을 형성하는 것은상기 노출된 필라형 액티브 영역 및 상기 블로킹막을 덮는 금속막을 형성하고,열처리하여 상기 노출된 필라형 액티브 영역의 하단부 측벽에 선택적으로 실리사이드막을 형성하고,상기 블록킹막 및 실리사이드화되지 않은 상기 금속막을 선택적으로 제거하는 것을 포함하는 반도체 장치의 제조 방법.
- 제1항에 있어서, 상기 비트라인을 형성하는 것은상기 노출된 필라형 액티브 영역 및 상기 블록킹막을 덮는 금속막을 형성함과 함께 상기 노출된 필라형 액티브 영역의 하단부 측벽에 선택적으로 실리사이드막을 형성하고,상기 블록킹막 및 실리사이드화되지 않은 상기 금속막을 선택적으로 제거하는 것을 포함하는 반도체 장치의 제조 방법.
- 제8항 또는 제9항에 있어서,상기 실리사이드막은 Co, Ni, Mo, Ta, Zr, W 및 Ti로 이루어진 군으로부터 선택된 어느 하나 이상의 금속 실리사이드막인 반도체 장치의 제조 방법.
- 제8항 또는 제9항에 있어서,상기 블록킹막은 TiN, TaN 및 WN으로 이루어진 군으로부터 선택된 어느 하나 이상을 포함하는 반도체 장치의 제조 방법.
- 반도체 기판에 정의된 필라형 액티브 영역을 포함하는 반도체 기판;상기 필라형 액티브 영역의 상단부에 형성된 소스 영역, 상기 소스 영역과 이격되어 상기 필라형 액티브 영역 내에 형성된 드레인 영역 및 상기 소스 영역과 상기 드레인 영역 사이에 위치하는 상기 필라형 액티브 영역의 측벽에 형성된 게이트 절연막 상의 게이트 전극을 포함하는 트랜지스터; 및상기 게이트 전극과 이격되어 상기 드레인 영역과 연결되며 상기 필라형 액티브 영역의 하단부 측벽에 선택적으로 형성된 비트라인을 포함하는 반도체 장치.
- 제12항에 있어서,상기 필라형 액티브 영역은 상기 소스 영역 및 상기 게이트 전극을 구비하는 상부 액티브 영역 및 상기 상부 액티브 영역의 하부에 위치하여 하단부 측벽에 상기 비트라인을 구비하며 상기 상부 액티브 영역보다 폭이 넓은 하부 액티브 영역을 포함하는 반도체 장치.
- 제13항에 있어서,상기 상부 액티브 영역은 그 일부가 리세스된 외벽 프로파일로 형성된 반도체 장치.
- 제13항에 있어서,상기 하부 액티브 영역의 하단부 측벽은 구형으로 형성된 반도체 장치.
- 제12항에 있어서,상기 게이트 전극은 TiN, TaN, WN 및 WCN으로 이루어진 군으로부터 선택된 어느 하나 이상으로 이루어진 반도체 장치.
- 제16항에 있어서,상기 게이트 전극은 금속으로 이루어진 워드 라인과 연결되는 반도체 장치.
- 제12항에 있어서,상기 비트라인은 실리사이드막으로 이루어진 반도체 장치.
- 제18항에 있어서,상기 실리사이드막은 Co, Ni, Mo, Ta, Zr, W 및 Ti로 이루어진 군으로부터 선택된 어느 하나 이상의 금속 실리사이드막인 반도체 장치.
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