JP6214965B2 - 半導体素子及びその製造方法 - Google Patents
半導体素子及びその製造方法 Download PDFInfo
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- JP6214965B2 JP6214965B2 JP2013171103A JP2013171103A JP6214965B2 JP 6214965 B2 JP6214965 B2 JP 6214965B2 JP 2013171103 A JP2013171103 A JP 2013171103A JP 2013171103 A JP2013171103 A JP 2013171103A JP 6214965 B2 JP6214965 B2 JP 6214965B2
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- pattern
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- element isolation
- trench
- ohmic
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- 239000004065 semiconductor Substances 0.000 title claims description 59
- 238000004519 manufacturing process Methods 0.000 title description 22
- 238000002955 isolation Methods 0.000 claims description 112
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 38
- 239000000758 substrate Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 23
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
- 229910052710 silicon Inorganic materials 0.000 claims description 19
- 239000010703 silicon Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 16
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 11
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 11
- 238000000059 patterning Methods 0.000 claims description 10
- 229910044991 metal oxide Inorganic materials 0.000 claims description 9
- 150000004706 metal oxides Chemical class 0.000 claims description 9
- 239000010410 layer Substances 0.000 description 69
- 238000003860 storage Methods 0.000 description 15
- 230000004888 barrier function Effects 0.000 description 14
- 239000011229 interlayer Substances 0.000 description 14
- 230000005415 magnetization Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 238000005530 etching Methods 0.000 description 12
- 150000004767 nitrides Chemical class 0.000 description 11
- 239000012782 phase change material Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 229910052714 tellurium Inorganic materials 0.000 description 6
- 230000005291 magnetic effect Effects 0.000 description 5
- 229910052723 transition metal Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011669 selenium Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- -1 tungsten nitride Chemical class 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 229910021332 silicide Inorganic materials 0.000 description 3
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 description 3
- 150000003624 transition metals Chemical class 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 229910003321 CoFe Inorganic materials 0.000 description 2
- 229910018979 CoPt Inorganic materials 0.000 description 2
- 229910000684 Cobalt-chrome Inorganic materials 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000010952 cobalt-chrome Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- VJQGOPNDIAJXEO-UHFFFAOYSA-N magnesium;oxoboron Chemical compound [Mg].O=[B] VJQGOPNDIAJXEO-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- PNHVEGMHOXTHMW-UHFFFAOYSA-N magnesium;zinc;oxygen(2-) Chemical compound [O-2].[O-2].[Mg+2].[Zn+2] PNHVEGMHOXTHMW-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052711 selenium Inorganic materials 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- VTMHSJONDPRVMJ-UHFFFAOYSA-N strontium barium(2+) oxygen(2-) zirconium(4+) Chemical compound [O--].[O--].[O--].[O--].[Sr++].[Zr+4].[Ba++] VTMHSJONDPRVMJ-UHFFFAOYSA-N 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 229910019227 CoFeTb Inorganic materials 0.000 description 1
- 229910002441 CoNi Inorganic materials 0.000 description 1
- 229910018936 CoPd Inorganic materials 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910015187 FePd Inorganic materials 0.000 description 1
- 229910005335 FePt Inorganic materials 0.000 description 1
- 229910005936 Ge—Sb Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002885 antiferromagnetic material Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000000231 atomic layer deposition Methods 0.000 description 1
- DQBAOWPVHRWLJC-UHFFFAOYSA-N barium(2+);dioxido(oxo)zirconium Chemical compound [Ba+2].[O-][Zr]([O-])=O DQBAOWPVHRWLJC-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000004770 chalcogenides Chemical class 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 1
- 229910021334 nickel silicide Inorganic materials 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 229910014031 strontium zirconium oxide Inorganic materials 0.000 description 1
- CZXRMHUWVGPWRM-UHFFFAOYSA-N strontium;barium(2+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[Ti+4].[Sr+2].[Ba+2] CZXRMHUWVGPWRM-UHFFFAOYSA-N 0.000 description 1
- FCCTVDGKMTZSPU-UHFFFAOYSA-N strontium;dioxido(oxo)zirconium Chemical compound [Sr+2].[O-][Zr]([O-])=O FCCTVDGKMTZSPU-UHFFFAOYSA-N 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 229910021341 titanium silicide Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- H10B12/05—Making the transistor
- H10B12/053—Making the transistor the transistor being at least partially in a trench in the substrate
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42356—Disposition, e.g. buried gate electrode
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- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
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- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/823481—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type isolation region manufacturing related aspects, e.g. to avoid interaction of isolation region with adjacent structure
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66568—Lateral single gate silicon transistors
- H01L29/66613—Lateral single gate silicon transistors with a gate recessing step, e.g. using local oxidation
- H01L29/66621—Lateral single gate silicon transistors with a gate recessing step, e.g. using local oxidation using etching to form a recess at the gate location
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
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- H10B61/22—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having three or more electrodes, e.g. transistors of the field-effect transistor [FET] type
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- H10B63/00—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
- H10B63/30—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having three or more electrodes, e.g. transistors
- H10B63/34—Resistance change memory devices, e.g. resistive RAM [ReRAM] devices comprising selection components having three or more electrodes, e.g. transistors of the vertical channel field-effect transistor type
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- H10N70/231—Multistable switching devices, e.g. memristors based on solid-state phase change, e.g. between amorphous and crystalline phases, Ovshinsky effect
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- H10N70/826—Device geometry adapted for essentially vertical current flow, e.g. sandwich or pillar type devices
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- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
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- H10N70/882—Compounds of sulfur, selenium or tellurium, e.g. chalcogenides
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- H10N70/883—Oxides or nitrides
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- H10N70/884—Other compounds of groups 13-15, e.g. elemental or compound semiconductors
Description
101、102・・・トレンチ
110・・・素子分離パターン
120・・・ゲートパターン
121・・・ゲート絶縁膜
122・・・ゲートライン
123・・・ゲートキャッピングパターン
130・・・金属膜
135・・・オーミックパターン
140、160,180,185・・・層間絶縁膜
150・・・ソースライン
170・・・コンタクトプラグ
190・・・上部プラグ
195・・・ビットライン
210・・・下部電極
220・・・基準パターン
230・・・トンネルバリアーパターン
240・・・自由パターン
250・・・上部電極
AP・・・活性部
LP・・・ラインパターン
ME・・・メモリ要素
RR・・・リセス領域
Claims (10)
- 第1及び第2トレンチによって限定される、活性部を含む基板と、
前記第1トレンチ内に配置されて前記活性部を横切る素子分離パターンと、
前記第2トレンチ内に配置されて前記活性部及び前記素子分離パターンを横切るゲートパターンと、
前記活性部各々の上部に形成されたオーミックパターンと、
前記オーミックパターンに接続する金属パターンと、を含み、
前記第1及び第2トレンチに平行な方向で測定される幅において、前記オーミックパターンの各々はそれの下に位置する前記活性部の中の相応する1つより大きい部分を含み、
前記ゲートパターンの各々は、
前記第2トレンチの内壁を覆うゲート絶縁膜と、
前記ゲート絶縁膜が形成された前記第2トレンチの下部領域を満たすゲートラインと、
前記ゲート絶縁膜が形成された前記第2トレンチの上部領域を満たすゲートキャッピングパターンと、を含み、
前記ゲート絶縁膜の上部面は、前記オーミックパターンの各々の側方に部分的に露出された、半導体素子。 - 第1及び第2トレンチによって限定される、活性部を含む基板と、
前記第1トレンチ内に配置されて前記活性部を横切る素子分離パターンと、
前記第2トレンチ内に配置されて前記活性部及び前記素子分離パターンを横切るゲートパターンと、
前記活性部各々の上部に形成されたオーミックパターンと、
前記オーミックパターンに接続する金属パターンと、を含み、
前記第1及び第2トレンチに平行な方向で測定される幅において、前記オーミックパターンの各々はそれの下に位置する前記活性部の中の相応する1つより大きい部分を含み、
前記素子分離パターンの各々は、前記第1トレンチの中の相応する1つに順に積層された第1素子分離パターン及び第2素子分離パターンを含み、
前記第1素子分離パターンは前記第2素子分離パターンより低い上部面を有して前記第2素子分離パターンの上部側面を露出させ、
前記オーミックパターンは、前記第1素子分離パターンの上部側面に接触する、半導体素子。 - 前記オーミックパターンは、前記第1素子分離パターンの上部面又は前記第2素子分離パターンの前記露出された上部側面の中の少なくとも1つに接触する請求項2に記載の半導体素子。
- 前記ゲート絶縁膜は、前記ゲートキャッピングパターンより低い上部面を有して前記ゲートキャッピングパターンの上部側面を露出させる請求項1に記載の半導体素子。
- 前記ゲート絶縁膜は、前記基板と前記ゲートラインの対向する表面との間の局所的領域内に各々形成されて前記ゲートラインは前記素子分離パターンに接触する請求項4に記載の半導体素子。
- 前記オーミックパターンは、前記ゲート絶縁膜の前記上部面又は前記ゲートキャッピングパターンの前記露出された上部側面の中の少なくとも1つに接触する請求項4に記載の半導体素子。
- 前記オーミックパターンの底面は、前記ゲート絶縁膜の前記上部面より低い請求項4に記載の半導体素子。
- 前記素子分離パターンの各々及び前記ゲートパターンの各々は、
シリコン酸化物及び金属酸化物の中の1つで形成され前記活性部に接する第1絶縁膜と、
シリコン窒化物及びシリコン酸化窒化物の中の1つで形成され前記活性部から離隔された第2絶縁膜と、を含み、
前記第1絶縁膜の各々は、前記第2絶縁膜の中の相応する1つより低い上部面を有し、前記オーミックパターンは水平的に延長されて前記第1絶縁膜の上部領域上に位置する部分を含む請求項1に記載の半導体素子。 - 基板をパターニングしてラインパターンを定義する、第1トレンチを形成する段階と、
前記第1トレンチ内に、第1及び第2素子分離パターンを含む、素子分離パターンを形成する段階と、
前記ラインパターン及び前記素子分離パターンをパターニングして前記第1トレンチを横切りながら活性部を定義する、第2トレンチを形成する段階と、
前記第2トレンチ内にゲート絶縁膜、ゲートライン、及びゲートキャッピングパターンを含む、ゲートパターンを形成する段階と、
前記第1素子分離パターン及び前記ゲート絶縁膜の中の少なくとも1つをリセスさせることによって、前記活性部の上部側面を露出させる段階と、
前記活性部の露出された表面を覆う金属膜を形成する段階と、
前記金属膜と前記基板を反応させることによって、前記活性部上にオーミックパターンを形成する段階と、を含む半導体素子の製造方法。 - 前記第1素子分離パターンは、シリコン酸化物で形成し、
前記ゲート絶縁膜は、シリコン酸化物及び金属酸化物の中の1つで形成し、
前記第2素子分離パターンは、シリコン窒化物及びシリコン酸化窒化物の中の1つで形成し、
前記ゲートキャッピングパターンは、シリコン窒化物及びシリコン酸化窒化物の中の1つで形成する請求項9に記載の半導体素子の製造方法。
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