JP4907838B2 - 窪み付きゲート構造を有するメモリデバイス - Google Patents
窪み付きゲート構造を有するメモリデバイス Download PDFInfo
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- JP4907838B2 JP4907838B2 JP2002586384A JP2002586384A JP4907838B2 JP 4907838 B2 JP4907838 B2 JP 4907838B2 JP 2002586384 A JP2002586384 A JP 2002586384A JP 2002586384 A JP2002586384 A JP 2002586384A JP 4907838 B2 JP4907838 B2 JP 4907838B2
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- 239000004065 semiconductor Substances 0.000 claims description 24
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 22
- 229920005591 polysilicon Polymers 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 21
- 239000003990 capacitor Substances 0.000 claims description 10
- 229910021332 silicide Inorganic materials 0.000 claims description 10
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical group [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000012545 processing Methods 0.000 description 42
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 19
- 229910052581 Si3N4 Inorganic materials 0.000 description 18
- 238000000034 method Methods 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229920002120 photoresistant polymer Polymers 0.000 description 5
- 238000000151 deposition Methods 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 210000000352 storage cell Anatomy 0.000 description 2
- 235000012431 wafers Nutrition 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical group [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 239000005380 borophosphosilicate glass Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 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
Images
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B99/00—Subject matter not provided for in other groups of this subclass
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/01—Manufacture or treatment
- H10B12/02—Manufacture or treatment for one transistor one-capacitor [1T-1C] memory cells
- H10B12/05—Making the transistor
- H10B12/053—Making the transistor the transistor being at least partially in a trench in the substrate
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/34—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells the transistor being at least partially in a trench in the substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- 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
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7833—Field effect transistors with field effect produced by an insulated gate with lightly doped drain or source extension, e.g. LDD MOSFET's; DDD MOSFET's
- H01L29/7834—Field effect transistors with field effect produced by an insulated gate with lightly doped drain or source extension, e.g. LDD MOSFET's; DDD MOSFET's with a non-planar structure, e.g. the gate or the source or the drain being non-planar
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
- H10B12/31—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells having a storage electrode stacked over the transistor
- H10B12/312—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells having a storage electrode stacked over the transistor with a bit line higher than the capacitor
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Ceramic Engineering (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Semiconductor Memories (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Thin Film Transistor (AREA)
- Electrodes Of Semiconductors (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
Claims (5)
- 半導体基板の約1000Åから2000Åの幅を有するトレンチに形成されたMOS半導体デバイスのゲート構造において、
前記トレンチの側壁および底部に形成された厚さが約30Åから約100Åを有するゲート酸化物層と、
前記ゲート酸化物層の上に重ねて設けられ、所定幅のまま少なくとも一部分を前記半導体基板の表面上にも位置させるとともに、前記表面上の側壁が前記ゲート酸化物層で覆われたポリシリコンゲートと、
前記ポリシリコンゲートの上部に重ねて設けた誘電体層と、
前記表面上の前記ゲート酸化物層の上のスペーサと
を有することを特徴とするMOS半導体デバイスのゲート構造。 - 半導体基板のトレンチに形成されたゲート構造であって、前記トレンチの側壁および底部に形成されたゲート酸化物層と、
前記ゲート酸化物層の上に重ねて設けられ、所定幅のまま少なくとも一部分を前記半導体基板の表面上にも位置させるとともに、前記表面上の側壁が前記ゲート酸化物層で覆われたポリシリコンゲートと、
前記ポリシリコンゲートの上に重ねて設けた誘電体層と、
前記表面上の前記ゲート酸化物層の上の窒化物スペーサと
を有するゲート構造と、
前記ゲート構造の両側に位置するソース領域およびドレイン領域であって、前記ゲート構造から、少なくとも前記スペーサの厚さだけ間隔を置いて配置されたソース領域およびドレイン領域と、
前記半導体基板の前記表面上に位置させたコンデンサと
を備えたことを特徴とするDRAMセル。 - 請求項2において、前記半導体基板のトレンチは、約1000Åから約2000Åの幅を有することを特徴とするDRAMセル。
- 請求項2において、前記ゲート酸化物層は、厚さ約30Åから約100Åを有することを特徴とするDRAMセル。
- 請求項2において、前記ゲート構造は、前記ポリシリコンゲート上に形成されたシリサイド領域を更に有することを特徴とするDRAMセル。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/842,788 US6498062B2 (en) | 2001-04-27 | 2001-04-27 | DRAM access transistor |
US09/842,788 | 2001-04-27 | ||
PCT/US2002/013196 WO2002089182A2 (en) | 2001-04-27 | 2002-04-26 | Recessed gat dram transistor and method |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009211925A Division JP5361626B2 (ja) | 2001-04-27 | 2009-09-14 | 窪み付きゲート構造を有するメモリデバイスの製造方法 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2004530300A JP2004530300A (ja) | 2004-09-30 |
JP2004530300A5 JP2004530300A5 (ja) | 2006-01-05 |
JP4907838B2 true JP4907838B2 (ja) | 2012-04-04 |
Family
ID=25288239
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002586384A Expired - Fee Related JP4907838B2 (ja) | 2001-04-27 | 2002-04-26 | 窪み付きゲート構造を有するメモリデバイス |
JP2009211925A Expired - Lifetime JP5361626B2 (ja) | 2001-04-27 | 2009-09-14 | 窪み付きゲート構造を有するメモリデバイスの製造方法 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009211925A Expired - Lifetime JP5361626B2 (ja) | 2001-04-27 | 2009-09-14 | 窪み付きゲート構造を有するメモリデバイスの製造方法 |
Country Status (7)
Country | Link |
---|---|
US (2) | US6498062B2 (ja) |
EP (1) | EP1382059A2 (ja) |
JP (2) | JP4907838B2 (ja) |
KR (1) | KR100547227B1 (ja) |
CN (1) | CN100375271C (ja) |
AU (1) | AU2002303494A1 (ja) |
WO (1) | WO2002089182A2 (ja) |
Families Citing this family (54)
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2001
- 2001-04-27 US US09/842,788 patent/US6498062B2/en not_active Expired - Lifetime
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2002
- 2002-04-26 WO PCT/US2002/013196 patent/WO2002089182A2/en active Application Filing
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- 2002-04-26 CN CNB028129016A patent/CN100375271C/zh not_active Expired - Lifetime
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CN100375271C (zh) | 2008-03-12 |
KR20040015184A (ko) | 2004-02-18 |
EP1382059A2 (en) | 2004-01-21 |
WO2002089182A2 (en) | 2002-11-07 |
AU2002303494A1 (en) | 2002-11-11 |
US20030040154A1 (en) | 2003-02-27 |
JP2004530300A (ja) | 2004-09-30 |
JP5361626B2 (ja) | 2013-12-04 |
KR100547227B1 (ko) | 2006-01-31 |
JP2010034567A (ja) | 2010-02-12 |
WO2002089182A3 (en) | 2003-11-06 |
US20020160568A1 (en) | 2002-10-31 |
US6780732B2 (en) | 2004-08-24 |
CN1520610A (zh) | 2004-08-11 |
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