KR100724568B1 - 반도체 메모리 소자 및 그 제조방법 - Google Patents
반도체 메모리 소자 및 그 제조방법 Download PDFInfo
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- KR100724568B1 KR100724568B1 KR1020050096108A KR20050096108A KR100724568B1 KR 100724568 B1 KR100724568 B1 KR 100724568B1 KR 1020050096108 A KR1020050096108 A KR 1020050096108A KR 20050096108 A KR20050096108 A KR 20050096108A KR 100724568 B1 KR100724568 B1 KR 100724568B1
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000011229 interlayer Substances 0.000 claims abstract description 59
- 125000006850 spacer group Chemical group 0.000 claims abstract description 53
- 150000004767 nitrides Chemical class 0.000 claims abstract description 42
- 229910003697 SiBN Inorganic materials 0.000 claims abstract description 39
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000758 substrate Substances 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052796 boron Inorganic materials 0.000 claims abstract description 34
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 34
- 239000010410 layer Substances 0.000 claims description 119
- 238000000034 method Methods 0.000 claims description 40
- 238000003860 storage Methods 0.000 claims description 28
- 238000000231 atomic layer deposition Methods 0.000 claims description 21
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000010030 laminating Methods 0.000 claims 2
- 239000007789 gas Substances 0.000 description 31
- 239000002184 metal Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 13
- 230000003071 parasitic effect Effects 0.000 description 8
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 8
- 229920005591 polysilicon Polymers 0.000 description 8
- 230000004888 barrier function Effects 0.000 description 7
- 239000011261 inert gas Substances 0.000 description 5
- 229910004205 SiNX Inorganic materials 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000000059 patterning Methods 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 239000005046 Chlorosilane Substances 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- -1 SiCl 6 Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000077 silane Inorganic materials 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
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- H01L21/318—Inorganic layers composed of nitrides
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Abstract
Description
Claims (19)
- 반도체 기판;상기 기판 상에 배치되는 층간 절연막;상기 층간 절연막 상에 배치되는 비트라인: 및상기 비트라인의 측벽을 덮고 보론 및 카본 중 적어도 하나를 함유한 질화막으로 이루어지는 비트라인 스페이서를 포함하는 반도체 메모리 소자.
- 제 1 항에 있어서,상기 질화막은 SiBN막, SiBCN막, SiCN막 및 BCN막 중 적어도 하나를 포함하는 것을 특징으로 하는 반도체 메모리 소자.
- 제 1 항에 있어서,상기 층간 절연막은 상부 및 하부 층간 절연막을 포함하고, 상기 상부 층간 절연막을 관통하는 도전성 패턴 및 상기 도전성 패턴의 측벽을 둘러싸는 콘택 스페이서를 더 포함하되, 상기 콘택 스페이서는 보론 및 카본 중 적어도 하나를 함유한 질화막인 것을 특징으로 하는 반도체 메모리 소자.
- 제 3 항에 있어서,상기 질화막은 SiBN막, SiBCN막, SiCN막 및 BCN막 중 적어도 하나를 포함하 는 것을 특징으로 하는 반도체 메모리 소자.
- 반도체 기판;상기 기판 상에 배치되는 층간 절연막;상기 층간 절연막 상에 배치되고, 차례로 적층된 비트라인 도전막 패턴 및 비트라인 캐핑막 패턴을 구비하는 비트라인 패턴; 및상기 비트라인 패턴의 측벽을 덮고 보론 및 카본 중 적어도 하나를 함유한 질화막으로 이루어지는 비트라인 스페이서를 포함하는 반도체 메모리 소자.
- 제 5 항에 있어서,상기 비트라인 캐핑막 패턴 및 상기 비트라인 스페이서 중 적어도 하나는 SiBN막, SiBCN막, SiCN막 및 BCN막 중 적어도 하나인 것을 특징으로 하는 반도체 메모리 소자.
- 제 5 항에 있어서,상기 층간 절연막 내에 배치되고, 차례로 적층된 게이트 도전막 패턴 및 게이트 캐핑막 패턴을 구비하는 게이트 패턴; 및상기 게이트 패턴의 측벽을 덮는 게이트 스페이서를 더 포함하되, 상기 게이트 캐핑막 패턴 및 상기 게이트 스페이서 중 적어도 하나는 SiBN막, SiBCN막, SiCN막 및 BCN막 중 적어도 하나인 것을 특징으로 하는 반도체 메모리 소자.
- 제 5 항에 있어서,상기 층간 절연막은 상부 및 하부 층간 절연막을 포함하고, 상기 상부 층간 절연막을 관통하는 제1 도전성 패턴 및 상기 제1 도전성 패턴의 측벽을 둘러싸는 콘택 스페이서를 더 포함하되, 상기 콘택 스페이서는 보론 및 카본 중 적어도 하나를 함유한 질화막인 것을 특징으로 하는 반도체 메모리 소자.
- 제 8 항에 있어서,상기 질화막은 SiBN막, SiBCN막, SiCN막 및 BCN막 중 적어도 하나를 포함하는 것을 특징으로 하는 반도체 메모리 소자.
- 제 8 항에 있어서,상기 층간 절연막 상에 배치되는 스토리지 노드; 및상기 층간 절연막을 관통하는 제2 도전성 패턴을 더 포함하되, 상기 스토리지 노드는 상기 제2 도전성 패턴에 전기적으로 접속되는 것을 특징으로 하는 반도체 메모리 소자.
- 반도체 기판을 준비하고,상기 기판 상에 층간 절연막을 형성하고,상기 층간 절연막 상에 비트라인 도전막 패턴 및 비트라인 캐핑막 패턴을 차례로 적층하여 비트라인 패턴을 형성하고, 및상기 비트라인 패턴의 측벽을 덮도록 보론 및 카본 중 적어도 하나를 함유한 질화막으로 이루어진 비트라인 스페이서를 형성하는 것을 포함하는 반도체 메모리 소자의 제조방법.
- 제 11 항에 있어서,상기 비트라인 캐핑막 패턴 및 상기 비트라인 스페이서 중 적어도 하나는 SiBN막, SiBCN막, SiCN막 및 BCN막 중 적어도 하나로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 제조방법.
- 제 12 항에 있어서,상기 비트라인 캐핑막 패턴 및 상기 비트라인 스페이서를 형성하는 것은원자층 증착법을 이용하여 수행되는 것을 특징으로 하는 반도체 메모리 소자의 제조방법.
- 제 13 항에 있어서,상기 원자층 증착법을 이용하는 공정은상기 기판이 400℃ 내지 800℃의 온도를 갖고 0.1torr 내지 3torr의 압력 하에서 진행되는 것을 특징으로 하는 반도체 메모리 소자의 제조방법.
- 상기 제 11 항에 있어서,상기 층간 절연막을 형성하기 전에상기 기판 상에 게이트 도전막 패턴 및 게이트 캐핑막 패턴을 차례로 적층하여 게이트 패턴을 형성하고,상기 게이트 패턴의 측벽을 덮는 게이트 스페이서를 형성하는 것을 더 포함하되, 상기 게이트 캐핑막 패턴 및 상기 게이트 스페이서 중 적어도 하나는 SiBN막, SiBCN막, SiCN막 및 BCN막 중 적어도 하나로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 제조방법.
- 제 11 항에 있어서,상기 층간 절연막을 형성하는 것은 하부 및 상부 층간 절연막을 차례로 형성하는 것을 포함하며,상기 층간 절연막을 형성한 후 상기 상부 층간 절연막을 관통하는 제1 도전성 패턴을 형성하고, 상기 제1 도전성 패턴의 측벽을 덮는 콘택 스페이서를 형성하는 것을 더 포함하되, 상기 콘택 스페이서는 보론 및 카본 중 적어도 하나를 함유한 질화막으로 형성하는 것을 특징으로 하는 반도체 메모리 소자의 제조방법.
- 제 16 항에 있어서,상기 질화막은 SiBN막, SiBCN막, SiCN막 및 BCN막 중 적어도 하나로 형성되는 것을 특징으로 하는 반도체 메모리 소자의 제조방법.
- 제 17 항에 있어서,상기 콘택 스페이서를 형성하는 것은 원자층 증착법을 이용하여 수행되는 것을 특징으로 하는 반도체 메모리 소자의 제조방법.
- 제 11 항에 있어서,상기 층간 절연막을 형성한 후에상기 층간 절연막을 관통하는 제2 도전성 패턴을 형성하고, 및상기 층간 절연막 상에 스토리지 노드를 형성하는 것을 더 포함하되, 상기 스토리지 노드와 상기 제2 도전성 패턴이 전기적으로 접속되도록 형성하는 것을 특징으로 하는 반도체 메모리 소자의 제조방법.
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