JP4947378B2 - 集積されたdram−nvram多値メモリ - Google Patents
集積されたdram−nvram多値メモリ Download PDFInfo
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- JP4947378B2 JP4947378B2 JP2007529952A JP2007529952A JP4947378B2 JP 4947378 B2 JP4947378 B2 JP 4947378B2 JP 2007529952 A JP2007529952 A JP 2007529952A JP 2007529952 A JP2007529952 A JP 2007529952A JP 4947378 B2 JP4947378 B2 JP 4947378B2
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- Prior art keywords
- random access
- dram
- nvram
- memory
- access memory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007667 floating Methods 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 16
- 230000004044 response Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000012212 insulator Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000003989 dielectric material Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000003915 cell function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- SBEQWOXEGHQIMW-UHFFFAOYSA-N silicon Chemical compound [Si].[Si] SBEQWOXEGHQIMW-UHFFFAOYSA-N 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C14/00—Digital stores characterised by arrangements of cells having volatile and non-volatile storage properties for back-up when the power is down
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
- G11C11/5621—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using charge storage in a floating gate
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
- G11C11/5671—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using charge trapping in an insulator
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C14/00—Digital stores characterised by arrangements of cells having volatile and non-volatile storage properties for back-up when the power is down
- G11C14/0009—Digital stores characterised by arrangements of cells having volatile and non-volatile storage properties for back-up when the power is down in which the volatile element is a DRAM cell
- G11C14/0018—Digital stores characterised by arrangements of cells having volatile and non-volatile storage properties for back-up when the power is down in which the volatile element is a DRAM cell whereby the nonvolatile element is an EEPROM element, e.g. a floating gate or metal-nitride-oxide-silicon [MNOS] transistor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/02—Disposition of storage elements, e.g. in the form of a matrix array
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Semiconductor Memories (AREA)
- Dram (AREA)
- Non-Volatile Memory (AREA)
- Thin Film Transistor (AREA)
Description
101〜103、302、303…ソース領域
104、105、304、305…ドレイン領域
110、111、310、311…トンネル誘電体
115、116、315、316…浮遊プレート
117、118…電荷ブロック層 120、320…制御ゲート
130、131、330、331…縦型ゲート
140〜142…空乏領域 160…データ/ビット線
170、171…DRAM−NVRAMメモリセル
180、181…浮遊ボディ
201、202…NVRAMトランジスタ
205、206…電界効果トランジスタ
232、233…DRAMワード線 301…絶縁層
317、318…電荷ブロック酸化物 400…メモリデバイス
410…プロセッサ 420…電子システム
430…メモリアレイ 440…アドレスバッファ回路
442…アドレス入力端子 444…行デコーダ
446…列デコーダ 450…センス/バッファ回路
455…書込み回路 460…データ入出力バッファ回路
462…データ端子 470…制御回路
472…制御端子
Claims (5)
- 浮遊ボディを備えると共に、基板の柱状部の一側面に縦型に形成されてデータを記憶するキャパシタレスのダイナミックランダムアクセスメモリデバイスと、
前記キャパシタレスのダイナミックランダムアクセスメモリデバイスの前記浮遊ボディを共有するように、前記柱状部の一側面とは反対の側面において縦型に形成される浮遊プレート型の不揮発性ランダムアクセスメモリデバイスと、
を備え、
前記柱状部は、複数のトレンチの間に形成され、
前記柱状部は、前記柱状部の上側に形成されたドレイン領域と、各トレンチの下側に形成されたソース領域とを有する
ことを特徴とする集積されたDRAM−NVRAMのメモリセル。 - 請求項1記載のメモリセルにおいて、前記不揮発性ランダムアクセスメモリデバイスは、浮遊プレート電荷記憶領域を備えることを特徴とするメモリセル。
- 請求項1又は2記載のメモリセルにおいて、前記不揮発性ランダムアクセスメモリデバイスは、複数のデータビットを記憶できる多値デバイスであることを特徴とするメモリセル。
- 請求項1〜3のいずれか1項に記載のメモリセルにおいて、前記ソース領域は、動作中に空乏領域を形成して、前記空乏領域同士の接触に応じて前記浮遊ボディを形成することを特徴とするメモリセル。
- メモリ制御信号を生成するプロセッサと、
前記プロセッサに接続され、前記メモリ制御信号に応じて動作するDRAM−NVRAM集積メモリアレイと、
を備える電子システムであって、
前記メモリアレイは、複数のメモリセルを備え、
各セルは、
浮遊ボディを備えると共に、基板の柱状部の一側面に縦型に形成されてデータを記憶するキャパシタレスのダイナミックランダムアクセスメモリデバイスと、
前記キャパシタレスのダイナミックランダムアクセスメモリデバイスの前記浮遊ボディを共有するように、前記柱状部の一側面とは反対の側面において縦型に形成される浮遊プレート型の不揮発性ランダムアクセスメモリデバイスと、
を備え、
前記柱状部は、複数のトレンチの間に形成され、
前記柱状部は、前記柱状部の上側に形成されたドレイン領域と、各トレンチの下側に形成されたソース領域とを有する
ことを特徴とする電子システム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/928,250 US7158410B2 (en) | 2004-08-27 | 2004-08-27 | Integrated DRAM-NVRAM multi-level memory |
US10/928,250 | 2004-08-27 | ||
PCT/US2005/029150 WO2006026159A1 (en) | 2004-08-27 | 2005-08-16 | Integrated dram-nvram multi-level memory |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008511947A JP2008511947A (ja) | 2008-04-17 |
JP4947378B2 true JP4947378B2 (ja) | 2012-06-06 |
Family
ID=35219390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007529952A Expired - Fee Related JP4947378B2 (ja) | 2004-08-27 | 2005-08-16 | 集積されたdram−nvram多値メモリ |
Country Status (6)
Country | Link |
---|---|
US (8) | US7158410B2 (ja) |
EP (1) | EP1782427B1 (ja) |
JP (1) | JP4947378B2 (ja) |
KR (1) | KR100864351B1 (ja) |
SG (1) | SG142304A1 (ja) |
WO (1) | WO2006026159A1 (ja) |
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US7403419B2 (en) | 2008-07-22 |
US7417893B2 (en) | 2008-08-26 |
EP1782427B1 (en) | 2012-09-19 |
KR100864351B1 (ko) | 2008-10-17 |
SG142304A1 (en) | 2008-05-28 |
US20060176726A1 (en) | 2006-08-10 |
US7459740B2 (en) | 2008-12-02 |
JP2008511947A (ja) | 2008-04-17 |
US7349252B2 (en) | 2008-03-25 |
US7379336B2 (en) | 2008-05-27 |
WO2006026159A1 (en) | 2006-03-09 |
US7457159B2 (en) | 2008-11-25 |
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