JP4868265B2 - 垂直アクセスデバイスを持つメモリ - Google Patents
垂直アクセスデバイスを持つメモリ Download PDFInfo
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- 239000000758 substrate Substances 0.000 claims description 40
- 239000004065 semiconductor Substances 0.000 claims description 31
- 238000003860 storage Methods 0.000 claims description 21
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 description 27
- 210000004027 cell Anatomy 0.000 description 22
- 230000036961 partial effect Effects 0.000 description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 239000003989 dielectric material Substances 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 125000006850 spacer group Chemical group 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000005229 chemical vapour deposition Methods 0.000 description 7
- 238000005530 etching Methods 0.000 description 7
- 238000005468 ion implantation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000001020 plasma etching Methods 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- 229920005591 polysilicon Polymers 0.000 description 5
- 229910021332 silicide Inorganic materials 0.000 description 5
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 4
- 210000003850 cellular structure Anatomy 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000013626 chemical specie Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- -1 transition metals Chemical class 0.000 description 2
- 238000001039 wet etching Methods 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
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 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
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005421 electrostatic potential Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- PEUPIGGLJVUNEU-UHFFFAOYSA-N nickel silicon Chemical compound [Si].[Ni] PEUPIGGLJVUNEU-UHFFFAOYSA-N 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Classifications
-
- 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
- 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
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
-
- 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
-
- 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
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
- H01L21/82—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 to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/84—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 to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
- H01L21/82—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 to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/84—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 to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body
- H01L21/86—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 to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body the insulating body being sapphire, e.g. silicon on sapphire structure, i.e. SOS
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Semiconductor Memories (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Non-Volatile Memory (AREA)
Description
本特許出願は2007年1月22日出願の米国特許出願No. 11/656,125の優先権の利益を主張し、同出願は引用により本明細書に組み込まれる。
本明細書に開示の情報は、半導体メモリデバイスと、そうしたデバイスの形成方法とを含む、集積回路デバイスとその製造方法とに概して関連する。
Claims (17)
- 半導体基板上に形成された複数のメモリセルであって、前記半導体基板上に形成された互いに直交するワード線及びビット線に結合された複数のメモリセルを含む、メモリアレイにおいて、
前記複数のメモリセルの各々は、
蓄積キャパシタと、
前記半導体基板内に形成されたMOSトランジスタであって、前記蓄積キャパシタと、前記ワード線のうちの選択された一つと、前記ビット線のうちの選択された一つとに結合されたMOSトランジスタと、
を含み、
前記メモリアレイは、
前記半導体基板内に形成された複数の凹部(50)であって、該複数の凹部の各々が、一対の対向する側壁部(46)とその間にのびる底部(48)とを含む、複数の凹部(50)と、
前記凹部の前記対向する側壁部のそれぞれの壁面上に部分的に配置された、前記ワード線の一部であるゲート導電性膜(64)と、
前記対向する側壁部のそれぞれの壁面と前記ゲート導電性膜との間に配置されたゲート誘電体層(62)と、
前記複数の凹部のうちの互いに隣接する凹部の間に形成された複数の第1のトレンチ(53)であって、前記複数の凹部の前記一対の対向する側壁部(46)の壁面に対して垂直な方向にのび、かつ、前記凹部の深さより深い深さを有する複数の第1のトレンチ(53)と、
前記複数の凹部の前記対向する側壁部(46)内に、前記対向する側壁部の壁面に対して垂直な方向に形成された複数の第2のトレンチ(52)であって、該複数の第2のトレンチの各々が、一対の対向する側壁部(45)とその間にのびる底部(47)とを含み、かつ、前記凹部の深さより浅い深さを有し、前記第2のトレンチの前記一対の対向する側壁部(45)のうちの一方が前記MOSトランジスタの一対のソース/ドレイン領域のうちの一方を含み、かつ、前記第2のトレンチの前記一対の対向する側壁部(45)のうちの他方が前記MOSトランジスタの一対のソース/ドレイン領域のうちの他方を含み、前記第2のトレンチの前記一対の対向する側壁部(45)の間の前記底部(47)が前記MOSトランジスタのチャネル領域を含む、複数の第2のトレンチ(52)と、
をさらに含むことを特徴とするメモリアレイ。 - 前記凹部は前記半導体基板の中に第一の深さまでのび、前記ゲート導電性膜は前記凹部の各側壁部の壁面に沿って前記第一の深さよりも浅い第二の深さまでのびている、請求項1に記載のメモリアレイ。
- 前記ソース/ドレイン領域は、前記第2のトレンチの前記側壁部の中に、前記半導体基板に対して垂直下方方向に第一の深さまでのび、前記ゲート導電性膜は前記凹部の前記側壁部の壁面に沿って前記第一の深さよりも深い第二の深さまでのびている、請求項1に記載のメモリアレイ。
- 前記ゲート導電性膜は上縁をさらに含み、前記上縁は、前記第一の深さ及び前記第二の深さよりも浅い第三の深さまで前記凹部内で陥凹される、請求項3に記載のメモリアレイ。
- 前記ゲート導電性膜は、前記凹部の前記側壁部と前記底部とが交わる部分から離れてのびる下縁をさらに含む、請求項1に記載のメモリアレイ。
- 前記ゲート誘電体層は、前記凹部の前記底部と前記一対の対向する側壁部とを覆っている、請求項1に記載のメモリアレイ。
- 前記ソース/ドレイン領域は、n+およびp-の導電性のうちの少なくとも一方を前記ソース/ドレイン領域に与えるようドープされている、請求項1に記載のメモリアレイ。
- 前記蓄積キャパシタはトレンチ型又はスタック型のキャパシタを含む、請求項1に記載のメモリアレイ。
- 半導体基板上に形成された複数のメモリセルであって、前記半導体基板上に形成された互いに直交するワード線及びビット線に結合された複数のメモリセルを含む、メモリアレイにおいて、
前記複数のメモリセルの各々は、
複数の蓄積キャパシタと、
前記半導体基板内に形成された複数のMOSトランジスタであって、前記蓄積キャパシタと、前記ワード線のうちの選択された一つと、前記ビット線のうちの選択された一つとに結合された複数のMOSトランジスタと、
を含み、
前記メモリアレイは、
前記半導体基板内に形成された複数の凹部(50)であって、該複数の凹部の各々が、前記MOSトランジスタの間にのび、一対の対向する側壁部(46)とその間にのびる底部(48)とを含む、複数の凹部(50)と、
前記凹部の前記対向する側壁部のそれぞれの壁面上に部分的に配置された、前記ワード線の一部であるゲート導電性膜と、
前記対向する側壁部のそれぞれの壁面と前記ゲート導電性膜との間に配置されたゲート誘電体層と、
前記複数の凹部のうちの互いに隣接する凹部の間に形成された複数の第1のトレンチ(53)であって、前記複数の凹部の前記一対の対向する側壁部(46)の壁面に対して垂直な方向にのび、かつ、前記凹部の深さより深い深さを有する複数の第1のトレンチ(53)と、
前記複数の凹部の前記対向する側壁部(46)内に、前記対向する側壁部の壁面に対して垂直な方向に形成された複数の第2のトレンチ(52)であって、該複数の第2のトレンチの各々が、一対の対向する側壁部(45)とその間にのびる底部(47)とを含み、かつ、前記凹部の深さより浅い深さを有し、前記第2のトレンチの前記一対の対向する側壁部(45)のうちの一方が前記MOSトランジスタの一対のソース/ドレイン領域のうちの一方を含み、かつ、前記第2のトレンチの前記一対の対向する側壁部(45)のうちの他方が前記MOSトランジスタの一対のソース/ドレイン領域のうちの他方を含み、前記第2のトレンチの前記一対の対向する側壁部(45)の間の前記底部(47)が前記MOSトランジスタのチャネル領域を含む、複数の第2のトレンチ(52)と、
をさらに含むことを特徴とするメモリアレイ。 - 前記凹部は前記基板の中に第一の深さまでのび、前記ゲート導電性膜は前記凹部の各側壁部の壁面に沿って前記第一の深さよりも浅い第二の深さまでのびている、請求項9に記載のメモリアレイ。
- 前記ソース/ドレイン領域は、前記第2のトレンチの前記側壁部の中に、前記半導体基板に対して垂直下方方向に第一の深さまでのび、前記ゲート導電性膜は前記凹部の各側壁部の壁面に沿って前記第一の深さよりも深い第二の深さまでのびている、請求項9に記載のメモリアレイ。
- 前記ゲート導電性膜は上縁をさらに含み、前記上縁は前記第一の深さ及び前記第二の深さよりも浅い第三の深さまで前記凹部内で陥凹される、請求項11に記載のメモリアレイ。
- 前記ゲート導電性膜は、前記凹部の前記側壁部と前記底部とが交わる部分から離れてのびる下縁をさらに含む、請求項9に記載のメモリアレイ。
- 前記ゲート誘電体層は、前記凹部の前記底部と前記一対の対向する側壁部とを覆っている、請求項9に記載のメモリアレイ。
- 前記ソース/ドレイン領域は、n+およびp-の導電性のうちの少なくとも一方を前記ソース/ドレイン領域に与えるようドープされている、請求項9に記載のメモリアレイ。
- 前記蓄積キャパシタはトレンチ型又はスタック型のキャパシタを含む、請求項9に記載のメモリアレイ。
- 前記ゲート導電性膜に結合されたコンタクト構造をさらに含む、請求項9に記載のメモリアレイ。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/656,125 US7859050B2 (en) | 2007-01-22 | 2007-01-22 | Memory having a vertical access device |
US11/656,125 | 2007-01-22 | ||
PCT/US2008/000785 WO2008091579A2 (en) | 2007-01-22 | 2008-01-22 | Memory having a vertical access device |
Publications (3)
Publication Number | Publication Date |
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JP2010517269A JP2010517269A (ja) | 2010-05-20 |
JP2010517269A5 JP2010517269A5 (ja) | 2011-03-17 |
JP4868265B2 true JP4868265B2 (ja) | 2012-02-01 |
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JP2009546445A Active JP4868265B2 (ja) | 2007-01-22 | 2008-01-22 | 垂直アクセスデバイスを持つメモリ |
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Country | Link |
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US (2) | US7859050B2 (ja) |
EP (1) | EP2126970B1 (ja) |
JP (1) | JP4868265B2 (ja) |
KR (1) | KR101425247B1 (ja) |
CN (1) | CN101669200B (ja) |
TW (1) | TWI384586B (ja) |
WO (1) | WO2008091579A2 (ja) |
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TWI384586B (zh) | 2013-02-01 |
WO2008091579A3 (en) | 2009-01-15 |
TW200845308A (en) | 2008-11-16 |
US7859050B2 (en) | 2010-12-28 |
KR101425247B1 (ko) | 2014-08-01 |
US20080173920A1 (en) | 2008-07-24 |
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