JP4646534B2 - 不揮発性メモリの振舞いに基づくプログラミング - Google Patents
不揮発性メモリの振舞いに基づくプログラミング Download PDFInfo
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- JP4646534B2 JP4646534B2 JP2004076471A JP2004076471A JP4646534B2 JP 4646534 B2 JP4646534 B2 JP 4646534B2 JP 2004076471 A JP2004076471 A JP 2004076471A JP 2004076471 A JP2004076471 A JP 2004076471A JP 4646534 B2 JP4646534 B2 JP 4646534B2
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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
- G11C16/04—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
- 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
- G11C16/10—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
- G11C16/34—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
- G11C16/3436—Arrangements for verifying correct programming or erasure
- G11C16/3454—Arrangements for verifying correct programming or for detecting overprogrammed cells
- G11C16/3459—Circuits or methods to verify correct programming of nonvolatile memory cells
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- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Read Only Memory (AREA)
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- For Increasing The Reliability Of Semiconductor Memories (AREA)
Description
304 コラム制御回路
306 ロウ制御回路
308 Pウェル制御回路
310 cソース制御回路
312 データI/O
314 コマンド回路
316 状態マシン
318 コントローラ
Claims (16)
- 不揮発性メモリをプログラムする方法であって、
1組の不揮発性記憶素子内の少なくともサブセットの不揮発性記憶素子のしきい値電圧が目標しきい値にまだ達していないと検証されている時点で、少なくとも1つの不揮発性記憶素子のしきい値電圧が目標しきい値に達したと検証されるまで、1組の不揮発性記憶素子用にプログラミングプロセスの最初の部分を実行するステップと、
前記少なくともサブセットの不揮発性記憶素子内の個々の不揮発性記憶素子を3またはそれ以上のグループのうちの1つに類別するように少なくとも第1および第2の検証電圧を用いて検証動作を実行するステップであって、しきい値電圧が第1のしきい値電圧よりも小さい前記不揮発性記憶素子の第1のグループ、しきい値電圧が第1のしきい値電圧と第2のしきい値電圧との間にある前記不揮発性記憶素子の第2のグループ、およびしきい値電圧が第2のしきい値電圧よりも大きい前記不揮発性記憶素子の第3のグループを含むものである、検証動作を実行するステップと、
前記少なくともサブセットの不揮発性記憶素子用のプログラミングプロセスを完了するステップであって、それぞれが禁止ビットライン電圧よりも小さい少なくとも第1,第2,第3の異なったビットライン電圧を用いて前記不揮発性記憶素子の第1,第2,第3のグループのしきい値電圧を上げることを含むものである、プログラミングプロセスを完了するステップと、
を含む方法。 - 請求項1記載の方法において、
前記プログラミングプロセスの最初の部分を実行するステップが、前記1組の不揮発性記憶素子のコントロールゲートに共通のプログラム電圧信号の第1の部分を印加するステップを含み、
前記プログラミングプロセスを完了するステップが、前記1組の不揮発性記憶素子のコントロールゲートに前記共通のプログラム電圧信号の第2の部分を印加するステップを含む方法。 - 請求項2記載の方法において、
個々のグループが、前記プログラミングプロセスの最初の部分中に類似するプログラミングスピードを有する不揮発性記憶素子を含む方法。 - 請求項3記載の方法において、
前記第3のビットライン電圧が前記第2のビットライン電圧よりも大きく、前記第2のビットライン電圧が前記第1のビットライン電圧よりも大きい方法。 - 請求項4記載の方法において、
前記共通のプログラム電圧信号の前記第1の部分が、第1のレートで上昇し、
前記共通のプログラム電圧信号の前記第2の部分が、前記第1のレートより上のレートで上昇する方法。 - 請求項1記載の方法において、
前記プログラミングプロセスの最初の部分を実行するステップと前記プログラミングプロセスを完了するステップとが、前記1組の不揮発性記憶素子に共通のプログラム電圧信号を印加するステップを含む方法。 - 請求項1記載の方法において、
前記プログラミングプロセスの最初の部分を実行するステップと前記プログラミングプロセスを完了するステップとが、前記1組の不揮発性記憶素子の個々の不揮発性記憶素子のコントロールゲートに共通のプログラム電圧信号を印加するステップを含む方法。 - 請求項1記載の方法において、
前記不揮発性記憶素子が、多状態記憶素子である方法。 - 不揮発性メモリをプログラムするシステムであって、
1組の不揮発性記憶素子と、
前記1組の不揮発性記憶素子と通信を行う制御ラインと、
前記制御ラインと通信を行う制御回路であって、前記制御回路が、(a)1組の不揮発性記憶素子内の少なくともサブセットの不揮発性記憶素子のしきい値電圧が目標しきい値にまだ達していないと検証されている時点で、少なくとも1つの不揮発性記憶素子のしきい値電圧が目標しきい値に達したと検証されるまで、1組の不揮発性記憶素子用にプログラミングプロセスの最初の部分を実行し、(b)前記少なくともサブセットの不揮発性記憶素子内の個々の不揮発性記憶素子を3またはそれ以上のグループのうちの1つに類別するように少なくとも第1および第2の検証電圧を用いて検証動作を実行し、しきい値電圧が第1のしきい値電圧よりも小さい前記不揮発性記憶素子の第1のグループ、しきい値電圧が第1のしきい値電圧と第2のしきい値電圧との間にある前記不揮発性記憶素子の第2のグループ、およびしきい値電圧が第2のしきい値電圧よりも大きい前記不揮発性記憶素子の第3のグループを含み、(c)それぞれが禁止ビットライン電圧よりも小さい少なくとも第1,第2,第3の異なったビットライン電圧を用いて前記不揮発性記憶素子の第1,第2,第3のグループのしきい値電圧を上げることにより、前記少なくともサブセットの不揮発性記憶素子内の前記不揮発性記憶素子用のプログラミングプロセスを完了するようにした制御回路と、
を備えるシステム。 - 請求項9記載のシステムにおいて、
前記プログラミングプロセスの最初の部分を実行することが、前記1組の不揮発性記憶素子のコントロールゲートに共通のプログラム電圧信号の第1の部分を印加することを含み、
前記プログラミングプロセスを完了することが、前記1組の不揮発性記憶素子のコントロールゲートに前記共通のプログラム電圧信号の第2の部分を印加することを含むシステム。 - 請求項10記載のシステムにおいて、
個々のグループが、前記プログラミングプロセスの最初の部分中に類似するプログラミングスピードを有する不揮発性記憶素子を含むシステム。 - 請求項11記載のシステムおいて、
前記第3のビットライン電圧が前記第2のビットライン電圧よりも大きく、前記第2のビットライン電圧が前記第1のビットライン電圧よりも大きいシステム。 - 請求項12記載のシステムにおいて、
前記共通のプログラム電圧信号の前記第1の部分が、第1のレートで上昇し、
前記共通のプログラム電圧信号の前記第2の部分が、前記第1のレートより上のレートで上昇するシステム。 - 請求項9記載のシステムにおいて、
前記プログラミングプロセスの最初の部分を実行することが、前記1組の不揮発性記憶素子に第1のレートで上昇する共通のプログラム電圧信号の第1の部分を印加することを含み、
前記プログラミングプロセスを完了することが、前記共通のプログラム電圧信号が前記第1のレートより上に上昇している間に、前記1組の不揮発性記憶素子に前記共通のプログラム電圧信号の第2の部分を印加することを含むシステム。 - 請求項9記載のシステムにおいて、
前記不揮発性記憶素子が、多状態記憶素子であるシステム。 - 請求項10記載のシステムにおいて、
前記不揮発性記憶素子が、多状態NANDフラッシュメモリ素子であるシステム。
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US10/689,333 US7177199B2 (en) | 2003-10-20 | 2003-10-20 | Behavior based programming of non-volatile memory |
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EP (1) | EP1678722B1 (ja) |
JP (1) | JP4646534B2 (ja) |
KR (2) | KR101323843B1 (ja) |
CN (1) | CN1879175B (ja) |
AT (1) | ATE496373T1 (ja) |
DE (1) | DE602004031139D1 (ja) |
TW (1) | TWI262506B (ja) |
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KR20120055733A (ko) | 2012-05-31 |
DE602004031139D1 (de) | 2011-03-03 |
CN1879175A (zh) | 2006-12-13 |
JP2005129194A (ja) | 2005-05-19 |
WO2005043548A1 (en) | 2005-05-12 |
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