KR101887414B1 - 반도체 장치 및 그 제조 방법 - Google Patents
반도체 장치 및 그 제조 방법 Download PDFInfo
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- KR101887414B1 KR101887414B1 KR1020120028305A KR20120028305A KR101887414B1 KR 101887414 B1 KR101887414 B1 KR 101887414B1 KR 1020120028305 A KR1020120028305 A KR 1020120028305A KR 20120028305 A KR20120028305 A KR 20120028305A KR 101887414 B1 KR101887414 B1 KR 101887414B1
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- insulating film
- spacer
- gate
- interlayer insulating
- gate electrode
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 title description 10
- 125000006850 spacer group Chemical group 0.000 claims abstract description 164
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims description 80
- 229910052751 metal Inorganic materials 0.000 claims description 80
- 239000011229 interlayer Substances 0.000 claims description 66
- 239000000463 material Substances 0.000 claims description 12
- 238000005530 etching Methods 0.000 claims description 9
- 230000006870 function Effects 0.000 description 32
- 239000010410 layer Substances 0.000 description 16
- 239000004020 conductor Substances 0.000 description 8
- 230000003071 parasitic effect Effects 0.000 description 7
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 150000004767 nitrides Chemical class 0.000 description 5
- 229910052814 silicon oxide Inorganic materials 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 2는 도 1의 A영역을 확대한 도면이다.
도 3 내지 도 16은 본 발명의 일 실시예에 따른 반도체 장치의 제조 방법을 설명하기 위한 중간 단계 도면들이다.
도 17은 본 발명의 다른 실시예에 따른 반도체 장치의 단면도이다.
도 18 내지 도 24는 본 발명의 다른 실시예에 따른 반도체 장치의 제조 방법을 설명하기 위한 중간 단계 도면들이다.
도 25는 본 발명의 또 다른 실시예에 따른 반도체 장치의 개념적인 레이아웃도이다.
도 26은 본 발명의 또 다른 실시예에 따른 반도체 장치의 단면도이다.
도 27은 본 발명의 실시예들에 따른 반도체 장치가 적용되는 전자 시스템의 블록도이다.
120: 더미 게이트 130: 식각 정지막 패턴
140: 제1 절연막 스페이서 150: 제3 절연막 스페이서
152: 에어갭 스페이서 160: 제2 절연막 스페이서
182, 184: 워크 펑션 메탈 192, 194: 게이트 전극
202: 마스크막 패턴 170, 230: 층간 절연막
300, 302: 게이트 구조물 310: 스페이서 구조물
Claims (10)
- 반도체 기판 상에 형성된 게이트 절연막 패턴;
상기 게이트 절연막 패턴 상에 형성된 게이트 전극;
상기 게이트 전극 및 게이트 절연막 패턴의 적어도 일측에 형성된 스페이서 구조물;
상기 스페이서 구조물에 인접하여 형성된 자기-정렬 컨택(self-aligned contact);
상기 반도체 기판 상에 형성되고, 상기 자기 정렬 컨택의 측면과 접하는 제1 층간 절연막; 및
상기 제1 층간 절연막 상에 형성되는 제2 층간 절연막을 포함하되,
상기 스페이서 구조물은,
상기 게이트 절연막 패턴과 접촉하는 제1 절연막 스페이서와,
상기 제1 절연막 스페이서의 외측에 순차적으로 형성된 에어갭(air gap) 스페이서 및 제2 절연막 스페이서를 포함하고,
상기 제2 절연막 스페이서는 상기 제1 층간 절연막과 식각 선택비를 가지고,
상기 제1 층간 절연막의 상면의 높이는 상기 스페이서 구조물의 상면의 높이보다 낮고,
상기 제2 층간 절연막은 상기 스페이서 구조물의 상면을 덮는 반도체 장치. - 제 1항에 있어서,
상기 제1 및 제2 절연막 스페이서와 상기 에어갭 스페이서의 두께는 서로 다른 반도체 장치. - 제 2항에 있어서,
상기 에어갭 스페이서의 두께는 상기 제1 및 제2 절연막 스페이서의 두께보다 큰 반도체 장치. - 제 1항에 있어서,
상기 게이트 전극 상에 형성된 마스크막 패턴을 더 포함하는 반도체 장치. - 제 4항에 있어서,
상기 마스크막 패턴과 상기 제1 절연막 스페이서는 서로 동일한 물질을 포함하는 반도체 장치. - 제 1항에 있어서,
상기 게이트 전극은 메탈 게이트 전극을 포함하고,
상기 게이트 절연막 패턴과 상기 메탈 게이트 전극 사이에 형성된 워크 펑션(work function) 메탈을 더 포함하는 반도체 장치. - 제1 및 제2 로직 영역을 포함하는 반도체 기판;
상기 제1 로직 영역 상에 형성된 제1 게이트 구조물;
상기 제2 로직 영역 상에 형성된 제2 게이트 구조물;
상기 제1 및 제2 게이트 구조물 각각의 적어도 일측에 형성된 스페이서 구조물;
상기 스페이서 구조물에 인접하여 형성된 자기-정렬 컨택;
상기 반도체 기판 상에 형성되고, 상기 자기 정렬 컨택의 측면과 접하는 제1 층간 절연막; 및
상기 제1 층간 절연막 상에 형성되고, 상기 자기 정렬 컨택의 측면과 접하는 제2 층간 절연막을 포함하되,
상기 스페이서 구조물은,
상기 제1 및 제2 게이트 구조물의 외측으로부터 순차적으로 형성된 제1 절연막 스페이서와, 에어갭 스페이서와, 제2 절연막 스페이서를 포함하고,
상기 제1 게이트 구조물은,
상기 반도체 기판 상에 형성된 제1 고유전율(High-K)막 패턴과, 상기 제1 고유전율막 패턴 상에 상기 제1 절연막 스페이서의 측벽을 따라 연장되어 형성된 제1 워크 펑션 메탈과, 상기 제1 워크 펑션 메탈 상에 형성된 제1 메탈 게이트 전극을 포함하고,
상기 제2 게이트 구조물은,
상기 반도체 기판 상에 형성된 제2 고유전율막 패턴과, 상기 제2 고유전율막 패턴 상에 형성된 제2 워크 펑션 메탈과, 상기 제2 워크 펑션 메탈 상에 상기 제1 절연막 스페이서와 접촉하며 형성된 제2 메탈 게이트 전극을 포함하고,
상기 제2 절연막 스페이서는 상기 제1 층간 절연막과 식각 선택비를 가지고,
상기 제1 층간 절연막의 상면의 높이는 상기 스페이서 구조물의 상면의 높이보다 낮고,
상기 제2 층간 절연막은 상기 스페이서 구조물의 상면을 덮는 반도체 장치. - 반도체 기판 상에 형성된 게이트 절연막 패턴과, 상기 게이트 절연막 패턴 상에 형성된 게이트 전극을 포함하는 게이트 구조물을 준비하고,
상기 게이트 구조물의 적어도 일측에 상기 게이트 절연막 패턴과 접촉되어 형성되는 제1 절연막 스페이서와, 상기 제1 절연막 스페이서의 외측에 순차적으로 형성된 제3 및 제2 절연막 스페이서를 포함하는 스페이서 구조물을 준비하고,
상기 반도체 기판 상에 상기 제2 절연막 스페이서와 식각 선택비를 가지는 제1 층간 절연막을 형성하고,
상기 제1 층간 절연막을 식각하여 상기 스페이서 구조물에 접하는 컨택 트렌치를 형성하고,
상기 컨택 트렌치를 채우는 자기-정렬 컨택을 형성하고,
상기 제1 및 제2 절연막 스페이서와 상기 제3 절연막 스페이서 간의 식각 선택비를 이용하여 상기 제3 절연막 스페이서의 전부 및 상기 제1 층간 절연막의 일부를 선택적으로 제거하고,
상기 스페이서 구조물 및 상기 제1 층간 절연막 상에 제2 층간 절연막을 형성하여 에어갭 스페이서를 형성하는 것을 포함하되,
상기 제1 층간 절연막의 상면의 높이는 상기 스페이서 구조물의 상면의 높이보다 낮은 반도체 장치의 제조 방법. - 제 8항에 있어서,
상기 제3 절연막 스페이서를 식각할 시, 상기 제1 층간 절연막과 상기 제3 절연막 스페이서는 동시에 식각되는 반도체 장치의 제조 방법. - 제 8항에 있어서,
상기 제1 절연막 스페이서와 상기 제2 절연막 스페이서는 동일한 물질을 포함하는 반도체 장치의 제조 방법.
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