JP5020527B2 - 不揮発性メモリ装置のプログラム検証方法 - Google Patents
不揮発性メモリ装置のプログラム検証方法 Download PDFInfo
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- JP5020527B2 JP5020527B2 JP2006106137A JP2006106137A JP5020527B2 JP 5020527 B2 JP5020527 B2 JP 5020527B2 JP 2006106137 A JP2006106137 A JP 2006106137A JP 2006106137 A JP2006106137 A JP 2006106137A JP 5020527 B2 JP5020527 B2 JP 5020527B2
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- program
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- voltage
- program verification
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- 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
- G11C16/3454—Arrangements for verifying correct programming or for detecting overprogrammed cells
-
- 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
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- Read Only Memory (AREA)
Description
120 ワードラインスイッチング部
130 ローデコーダ
140 プログラム検証電圧選択部
150 プログラム検証電圧発生部
160 アドレスデコーダ
170 ページバッファ
Claims (6)
- ソースラインから隣接した順に配置される1番目ないしN(Nは3以上の自然数)番目個のワードラインそれぞれに連結されたメモリセルを含むNAND型フラッシュメモリ装置のプログラム検証方法において、
(a)前記N個のワードラインのうちプログラム対象ワードラインにプログラム電圧を印加し、当該ワードラインに連結されたメモリセルにデータをプログラムする段階と、
(b)前記プログラム対象ワードラインが、最後に該当するN番目なのか否かを判断する段階と、
(c)前記プログラム対象ワードラインがN番目でなければ、前記プログラム対象ワードラインに第1プログラム検証電圧を印加してプログラムのパス/フェールを検証する段階と、
(d)前記段階(c)におけるプログラムがパスであれば、前記ワードラインを駆動させるためのアドレスを一つ増加させて次のプログラム対象ワードラインに前記プログラム電圧を印加し、当該ワードラインに連結されたメモリセルにデータをプログラムする段階と、
(e)前記段階(b)に戻って前記段階(d)におけるプログラム対象ワードラインがN番目であれば、当該N番目のプログラム対象ワードラインに前記第1プログラム検証電圧より高い第2プログラム検証電圧を印加してプログラムのパス/フェールを検証する段階とを含むが、
前記段階(a)〜(d)は、前記プログラム対象ワードラインがN番目になるまで前記1番目のワードラインから順に繰り返し行われ、前記N個のワードラインのうち前記N番目のワードラインを除いたワードラインには、同一のプログラム検証電圧である前記第1プログラム検証電圧が印加されることを特徴とする不揮発性メモリ装置のプログラム検証方法。 - 前記段階(c)におけるプログラムがフェールであれば、前記段階(a)のプログラム対象ワードラインに、前記プログラム電圧に所定の電圧を加えたプログラム電圧を印加し、前記当該ワードラインに連結されたメモリセルにデータを再びプログラムする段階をさらに含むことを特徴とする請求項1に記載の不揮発性メモリ装置のプログラム検証方法。
- 前記段階(e)におけるプログラムがフェールであれば、前記段階(d)の次のプログラム対象ワードラインに、前記プログラム電圧に所定の電圧を加えたプログラム電圧を印加し、前記当該ワードラインに連結されたメモリセルにデータを再びプログラムする段階をさらに含むことを特徴とする請求項1に記載の不揮発性メモリ装置のプログラム検証方法。
- 前記第2プログラム検証電圧レベルは、前記第1プログラム検証電圧レベルより高い1.2Vであることを特徴とする請求項1に記載の不揮発性メモリ装置のプログラム検証方法。
- 前記第1プログラム検証電圧レベルは、前記第2プログラム検証電圧レベルより低い0.8Vあるいは1.0Vであることを特徴とする請求項1に記載の不揮発性メモリ装置のプログラム検証方法。
- 前記メモリセルそれぞれは、マルチレベルセルまたはシングルレベルセルであることを特徴とする請求項1に記載の不揮発性メモリ装置のプログラム検証方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050030076A KR100680479B1 (ko) | 2005-04-11 | 2005-04-11 | 비휘발성 메모리 장치의 프로그램 검증 방법 |
KR10-2005-0030076 | 2005-04-11 |
Publications (2)
Publication Number | Publication Date |
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JP2006294229A JP2006294229A (ja) | 2006-10-26 |
JP5020527B2 true JP5020527B2 (ja) | 2012-09-05 |
Family
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Family Applications (1)
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JP2006106137A Expired - Fee Related JP5020527B2 (ja) | 2005-04-11 | 2006-04-07 | 不揮発性メモリ装置のプログラム検証方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7310271B2 (ja) |
JP (1) | JP5020527B2 (ja) |
KR (1) | KR100680479B1 (ja) |
CN (1) | CN100547688C (ja) |
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2005
- 2005-04-11 KR KR1020050030076A patent/KR100680479B1/ko not_active IP Right Cessation
-
2006
- 2006-04-07 JP JP2006106137A patent/JP5020527B2/ja not_active Expired - Fee Related
- 2006-04-07 US US11/400,587 patent/US7310271B2/en active Active
- 2006-04-11 CN CNB2006100820519A patent/CN100547688C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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KR20060107716A (ko) | 2006-10-16 |
US20060227618A1 (en) | 2006-10-12 |
US7310271B2 (en) | 2007-12-18 |
CN1855309A (zh) | 2006-11-01 |
KR100680479B1 (ko) | 2007-02-08 |
JP2006294229A (ja) | 2006-10-26 |
CN100547688C (zh) | 2009-10-07 |
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