JP5410390B2 - 不揮発性記憶装置のための可変書き込み - Google Patents
不揮発性記憶装置のための可変書き込み Download PDFInfo
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- JP5410390B2 JP5410390B2 JP2010202456A JP2010202456A JP5410390B2 JP 5410390 B2 JP5410390 B2 JP 5410390B2 JP 2010202456 A JP2010202456 A JP 2010202456A JP 2010202456 A JP2010202456 A JP 2010202456A JP 5410390 B2 JP5410390 B2 JP 5410390B2
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- 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
- G11C11/5628—Programming or writing circuits; Data input circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/34—Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/04—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS
- G11C16/0483—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells having several storage transistors connected in series
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/10—Programming or data input circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/10—Programming or data input circuits
- G11C16/12—Programming voltage switching circuits
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/34—Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
- G11C16/3418—Disturbance prevention or evaluation; Refreshing of disturbed memory data
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/34—Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
- G11C16/3436—Arrangements for verifying correct programming or erasure
- G11C16/344—Arrangements for verifying correct erasure or for detecting overerased cells
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Read Only Memory (AREA)
Description
Claims (12)
- 複数の不揮発性記憶素子と、
前記複数の不揮発性記憶素子に対してマルチパス書き込みを行う1以上の管理回路と、を備えており、
前記1以上の管理回路は、前記複数の不揮発性記憶素子に対して、マルチパスの第1書き込み処理を実行するとともに、前記第1書き込み処理の後にマルチパスの第2書き込み処理を実行し、
前記第1及び第2書き込み処理の夫々は、複数の書き込みパルスを用いて前記複数の不揮発性記憶素子を目標状態の組に書き込むことを含み、
前記1以上の管理回路は、
前記第1書き込み処理において特定の結果を達成した書き込みパルスを特定し、
前記第2書き込み処理における複数の書き込みパルスの少なくとも一つを、前記特定された書き込みパルスによって調整する、
ことを特徴とする不揮発性記憶システム。 - 前記1以上の管理回路は、最初のN個の不揮発性記憶素子をそれらの目標状態に到達させたときのパルスを、前記第1書き込み処理において特定の結果を達成した書き込みパルスとして特定することを特徴とする請求項1に記載の不揮発性記憶システム。
- 前記1以上の管理回路は、前記第2書き込み処理における複数の書き込みパルスの最初のパルスの大きさを、前記特定された書き込みパルスに基づいて調整することを特徴とする請求項2に記載の不揮発性記憶システム。
- 前記1以上の管理回路は、前記第2書き込み処理における複数の書き込みパルスの最初のパルスの大きさを、前記特定された書き込みパルスと等しい大きさに設定することを特徴とする請求項3に記載の不揮発性記憶システム。
- 前記Nは、誤り訂正符号によって訂正可能なエラーの数よりも小さい数であることを特徴とする請求項2から4のいずれか1項に記載の不揮発性記憶システム。
- 前記不揮発性記憶素子は、NANDフラッシュメモリ素子であることを特徴とする請求項1から5のいずれか1項に記載の不揮発性記憶システム。
- 不揮発性記憶装置のマルチパス書き込み方法であり、
複数の書き込みパルスを用いて複数の不揮発性記憶素子を目標状態の組に書き込むマルチパスの第1書き込み処理を実行すること;
前記第1書き込み処理において特定の結果を達成した書き込みパルスを特定すること;
前記第1書き込み処理の後に、複数の書き込みパルスを用いて前記複数の不揮発性記憶素子を目標状態の組に書き込むマルチパスの第2書き込み処理を実行すること;
を含んでおり、当該方法はさらに、
前記第2書き込み処理における複数の書き込みパルスの少なくとも一つを、前記特定された書き込みパルスによって調整する、
ことを特徴とする不揮発性記憶装置のマルチパス書き込み方法。 - 最初のN個の不揮発性記憶素子をそれらの目標状態に到達させたときのパルスを、特定の結果を達成した書き込みパルスとして特定することを特徴とする請求項7に記載のマルチパス書き込み方法。
- 前記第2書き込み処理における複数の書き込みパルスの最初のパルスの大きさを、前記特定された書き込みパルスに基づいて調整することを特徴とする請求項8に記載のマルチパス書き込み方法。
- 前記第2書き込み処理における複数の書き込みパルスの最初のパルスの大きさを、前記特定された書き込みパルスと等しい大きさに設定することを特徴とする請求項9に記載のマルチパス書き込み方法。
- 前記Nは、誤り訂正符号によって訂正可能なエラーの数よりも小さい数であることを特徴とする請求項8から10のいずれか1項に記載のマルチパス書き込み方法。
- 前記不揮発性記憶素子は、NANDフラッシュメモリ素子であることを特徴とする請求項7から11のいずれか1項に記載のマルチパス書き込み方法。
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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US89083207P | 2007-02-20 | 2007-02-20 | |
US60/890,832 | 2007-02-20 | ||
US69499307A | 2007-03-31 | 2007-03-31 | |
US11/694,992 | 2007-03-31 | ||
US11/694,992 US7619930B2 (en) | 2007-02-20 | 2007-03-31 | Dynamic verify based on threshold voltage distribution |
US11/694,993 | 2007-03-31 |
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JP2009550966A Division JP5113195B2 (ja) | 2007-02-20 | 2008-02-13 | 閾値電圧区分に基づく動的検証 |
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JP2011008913A JP2011008913A (ja) | 2011-01-13 |
JP5410390B2 true JP5410390B2 (ja) | 2014-02-05 |
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JP2009550966A Expired - Fee Related JP5113195B2 (ja) | 2007-02-20 | 2008-02-13 | 閾値電圧区分に基づく動的検証 |
JP2010202456A Expired - Fee Related JP5410390B2 (ja) | 2007-02-20 | 2010-09-09 | 不揮発性記憶装置のための可変書き込み |
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Country Status (6)
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EP (3) | EP2122627B1 (ja) |
JP (2) | JP5113195B2 (ja) |
KR (2) | KR101163162B1 (ja) |
CN (2) | CN101689400B (ja) |
TW (1) | TWI374446B (ja) |
WO (1) | WO2008103586A1 (ja) |
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2008
- 2008-02-13 EP EP08729770A patent/EP2122627B1/en active Active
- 2008-02-13 KR KR1020107017595A patent/KR101163162B1/ko active IP Right Grant
- 2008-02-13 WO PCT/US2008/053858 patent/WO2008103586A1/en active Application Filing
- 2008-02-13 JP JP2009550966A patent/JP5113195B2/ja not_active Expired - Fee Related
- 2008-02-13 CN CN2008800051379A patent/CN101689400B/zh active Active
- 2008-02-13 CN CN201010276484.4A patent/CN102005244B/zh active Active
- 2008-02-13 EP EP12152441.7A patent/EP2458592B1/en active Active
- 2008-02-13 KR KR1020097019391A patent/KR101147522B1/ko active IP Right Grant
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- 2008-02-20 TW TW097105962A patent/TWI374446B/zh not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
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JP2011008913A (ja) | 2011-01-13 |
JP2010519673A (ja) | 2010-06-03 |
KR101147522B1 (ko) | 2012-05-21 |
CN101689400B (zh) | 2013-07-03 |
KR20100101694A (ko) | 2010-09-17 |
EP2348511B1 (en) | 2014-08-13 |
JP5113195B2 (ja) | 2013-01-09 |
TW200849247A (en) | 2008-12-16 |
EP2458592A2 (en) | 2012-05-30 |
CN101689400A (zh) | 2010-03-31 |
EP2458592B1 (en) | 2014-03-26 |
KR101163162B1 (ko) | 2012-07-06 |
KR20100024913A (ko) | 2010-03-08 |
CN102005244A (zh) | 2011-04-06 |
WO2008103586A1 (en) | 2008-08-28 |
EP2122627A1 (en) | 2009-11-25 |
TWI374446B (en) | 2012-10-11 |
EP2458592A3 (en) | 2012-08-15 |
EP2122627B1 (en) | 2013-01-30 |
CN102005244B (zh) | 2015-10-21 |
EP2348511A1 (en) | 2011-07-27 |
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