JP2008047933A - チャネルアクセストランジスタおよび積層型蓄積キャパシタを備えた垂直dram装置および関連方法 - Google Patents
チャネルアクセストランジスタおよび積層型蓄積キャパシタを備えた垂直dram装置および関連方法 Download PDFInfo
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- 238000003860 storage Methods 0.000 claims description 27
- 125000006850 spacer group Chemical group 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 150000004767 nitrides Chemical class 0.000 claims 2
- 210000004027 cell Anatomy 0.000 description 49
- 229910052581 Si3N4 Inorganic materials 0.000 description 17
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 17
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
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- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000000059 patterning Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
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- 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
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Abstract
【解決手段】集積回路メモリ装置は、少なくとも1つの接続線23を内部に有する基板22と、基板22上に形成された複数のメモリセル20と、を含む。各メモリセル20は、接続線23に電気的に接続された、セルアクセストランジスタのための下部ソース/ドレイン領域42と、セルアクセストランジスタのための上部ソース/ドレイン領域44と、下部ソース/ドレイン領域42および上部ソース/ドレイン領域44の間に垂直方向に延在する少なくとも1つのチャネル領域46と、からなるピラー40を含む。更に、上部ソース/ドレイン領域44に隣接する蓄積キャパシタを含み、蓄積キャパシタは第1の電極層56、誘電体層58、第2の電極層60からなる。
【選択図】図1
Description
Claims (10)
- 集積回路メモリ装置であって、
基板と、
セルアクセストランジスタと、
蓄積キャパシタを含み、
前記セルアクセストランジスタが、
前記基板の長さ方向に少なくとも一部沿って延伸する接続線と、
前記接続線に電気的に接続された導電的にドープされた下部ソース/ドレイン領域と、
前記導電的にドープされた下部ソース/ドレイン領域上に渡って配置され、チャネル領域を規定する導電的にドープされた上部ソース/ドレイン領域と、ここで、前記導電的にドープされた下部ソース/ドレイン領域、前記チャネル領域及び前記導電的にドープされた上部ソース/ドレイン領域はトランジスタピラーを形成し、
前記チャネル領域に近接する前記トランジスタピラーの表面上に配置されたゲート誘電体層及び導電ゲート層を含むゲートと、
前記上部ソース/ドレイン領域上に渡って配置され直接接触する導電性ソース/ドレイン層と、ここで、前記導電性ソース/ドレイン層は平面上部表面を有し、
前記導電性ソース/ドレイン層に沿い、その側面と接触し、その下部に配置された誘電体スペーサを含み、ここで、前記導電性ソース/ドレイン層の平面上部表面と前記誘電体スペーサの上部表面は共平面であり、
前記蓄積キャパシタが前記導電性ソース/ドレイン層と電気的に接続し、前記蓄積キャパシタはさらに前記導電性ソース/ドレイン層の前記平面上部表面上に渡って配置される第1の部分と、前記誘電体スペーサに完全に沿って延伸し直接接触する第2の部分を有する
ことを特徴とする集積回路メモリ装置。 - 前記蓄積キャパシタは、
前記導電性ソース/ドレイン層の前記平面上部表面に隣接し、それに電気的に接続されている、第1の電極層と、
該第1の電極層に隣接する誘電体層と、
該誘電体層に隣接する第2の電極層と、
を含む請求項1記載の集積回路メモリ装置。 - 垂直方向に前記基板に隣接し横方向に前記ピラーに隣接する、少なくとも1つの下部誘電体層と、
垂直方向に該少なくとも1つの下部誘電体層の上方に間隔を空けて配置され、横方向に前記ピラーに隣接する、少なくとも1つの上部誘電体層とを含み、
前記ゲートは前記少なくとも一つの下部誘電体層と前記上部誘電体層の間にあることを特徴とする請求項1記載の集積回路メモリ装置。 - 第2のチャネル領域に近接する前記ピラーの対抗する表面上に配置された第2のゲートをさらに含むことを特徴とする請求項3記載の集積回路メモリ装置。
- 前記少なくとも一つの上部誘電体層が、前記ゲート上の酸化物層及び前記酸化物層上の窒化物層を含むことを特徴とする請求項4記載の集積回路メモリ装置。
- 集積回路メモリ装置を製造する方法であって、
セルアクセストランジスタを形成する工程と、ここで、前記セルアクセストランジスタは、
基板の長さ方向に少なくとも一部沿って延伸する接続線を形成し、
前記接続線に電気的に接続された導電的にドープされた下部ソース/ドレイン領域を形成し、
前記導電的にドープされた下部ソース/ドレイン領域上に渡って配置され、チャネル領域を規定する導電的にドープされた上部ソース/ドレイン領域を形成し、ここで、前記導電的にドープされた下部ソース/ドレイン領域、前記チャネル領域及び前記導電的にドープされた上部ソース/ドレイン領域はトランジスタピラーを形成し、
前記チャネル領域に近接する前記トランジスタピラーの表面上に配置されたゲート誘電体層及び導電ゲート層を含むゲートを形成し、
前記上部ソース/ドレイン領域上に渡って配置され直接接触する導電性ソース/ドレイン層を形成し、ここで、前記導電性ソース/ドレイン層は平面上部表面を有し、
前記導電性ソース/ドレイン層に沿い、その側面と接触し、その下部に配置された誘電体スペーサを形成する工程を含み、ここで、前記導電性ソース/ドレイン層の平面上部表面と前記誘電体スペーサの上部表面は共平面であり、
前記蓄積キャパシタを前記導電性ソース/ドレイン層と電気的に接続する工程を含み、前記蓄積キャパシタはさらに前記導電性ソース/ドレイン層の前記平面上部表面上に渡って配置される第1の部分と、前記誘電体スペーサに完全に沿って延伸し直接接触する第2の部分を有する
ことを特徴とする集積回路メモリ装置の製造方法。 - 前記蓄積キャパシタは、
前記導電性ソース/ドレイン層の前記平面上部表面に隣接し、それに電気的に接続されている、第1の電極層と、
該第1の電極層に隣接する誘電体層と、
該誘電体層に隣接する第2の電極層と、
を含む請求項6記載の集積回路メモリ装置の製造方法。 - 垂直方向に前記基板に隣接し横方向に前記ピラーに隣接する、少なくとも1つの下部誘電体層と、
垂直方向に該少なくとも1つの下部誘電体層の上方に間隔を空けて配置され、横方向に前記ピラーに隣接する、少なくとも1つの上部誘電体層とを含み、
前記ゲートは前記少なくとも一つの下部誘電体層と前記上部誘電体層の間にあることを特徴とする請求項6記載の集積回路メモリ装置の製造方法。 - 第2のチャネル領域に近接する前記ピラーの対抗する表面上に配置された第2のゲートをさらに含むことを特徴とする請求項8記載の集積回路メモリ装置の製造方法。
- 前記少なくとも一つの上部誘電体層が、前記ゲート上の酸化物層及び前記酸化物層上の窒化物層を含むことを特徴とする請求項8記載の集積回路メモリ装置の製造方法。
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US09/553,868 US6603168B1 (en) | 2000-04-20 | 2000-04-20 | Vertical DRAM device with channel access transistor and stacked storage capacitor and associated method |
US09/553868 | 2000-04-20 |
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JP2001122417A Division JP2001308203A (ja) | 2000-04-20 | 2001-04-20 | チャネルアクセストランジスタおよび積層型蓄積キャパシタを備えた垂直dram装置および関連方法 |
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JP2008047933A true JP2008047933A (ja) | 2008-02-28 |
JP4888975B2 JP4888975B2 (ja) | 2012-02-29 |
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JP2007241699A Expired - Fee Related JP4888975B2 (ja) | 2000-04-20 | 2007-09-19 | チャネルアクセストランジスタおよび積層型蓄積キャパシタを備えた垂直dram装置および関連方法 |
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US (1) | US6603168B1 (ja) |
EP (1) | EP1148552A3 (ja) |
JP (2) | JP2001308203A (ja) |
KR (1) | KR100757697B1 (ja) |
TW (1) | TW490840B (ja) |
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US20030052365A1 (en) * | 2001-09-18 | 2003-03-20 | Samir Chaudhry | Structure and fabrication method for capacitors integratible with vertical replacement gate transistors |
US7372091B2 (en) * | 2004-01-27 | 2008-05-13 | Micron Technology, Inc. | Selective epitaxy vertical integrated circuit components |
JP4164452B2 (ja) * | 2004-02-02 | 2008-10-15 | キヤノン株式会社 | 情報処理方法及び装置 |
US7504685B2 (en) * | 2005-06-28 | 2009-03-17 | Micron Technology, Inc. | Oxide epitaxial isolation |
JP5525156B2 (ja) * | 2008-12-09 | 2014-06-18 | ピーエスフォー ルクスコ エスエイアールエル | 半導体装置、および該半導体装置の製造方法 |
JP4530098B1 (ja) * | 2009-05-29 | 2010-08-25 | 日本ユニサンティスエレクトロニクス株式会社 | 半導体装置 |
US9177872B2 (en) | 2011-09-16 | 2015-11-03 | Micron Technology, Inc. | Memory cells, semiconductor devices, systems including such cells, and methods of fabrication |
WO2013168624A1 (en) * | 2012-05-10 | 2013-11-14 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
US9698261B2 (en) | 2014-06-30 | 2017-07-04 | Taiwan Semiconductor Manufacturing Co., Ltd. | Vertical device architecture |
US9911848B2 (en) * | 2014-08-29 | 2018-03-06 | Taiwan Semiconductor Manufacturing Co., Ltd. | Vertical transistor and method of manufacturing the same |
KR20240091175A (ko) * | 2021-11-09 | 2024-06-21 | 유니산티스 일렉트로닉스 싱가포르 프라이빗 리미티드 | 반도체 메모리 장치 및 반도체 메모리 장치의 제조 방법 |
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2000
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US5414289A (en) * | 1992-03-02 | 1995-05-09 | Motorola, Inc. | Dynamic memory device having a vertical transistor |
JP2000091578A (ja) * | 1998-08-28 | 2000-03-31 | Lucent Technol Inc | 垂直トランジスタの作製プロセス |
Also Published As
Publication number | Publication date |
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US6603168B1 (en) | 2003-08-05 |
EP1148552A3 (en) | 2005-10-12 |
JP4888975B2 (ja) | 2012-02-29 |
KR100757697B1 (ko) | 2007-09-13 |
KR20010098730A (ko) | 2001-11-08 |
JP2001308203A (ja) | 2001-11-02 |
EP1148552A2 (en) | 2001-10-24 |
TW490840B (en) | 2002-06-11 |
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