JP2022522439A - メモリデバイスにおけるプログラム撹乱低減方法およびそれを利用するメモリデバイス - Google Patents
メモリデバイスにおけるプログラム撹乱低減方法およびそれを利用するメモリデバイス Download PDFInfo
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- G—PHYSICS
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- G11C8/00—Arrangements for selecting an address in a digital store
- G11C8/08—Word line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, for word lines
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- G—PHYSICS
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- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
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- G11C16/08—Address circuits; Decoders; Word-line control circuits
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- G—PHYSICS
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- 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
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- G11C16/3418—Disturbance prevention or evaluation; Refreshing of disturbed memory data
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- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
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- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
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- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
- G11C11/40—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors
- G11C11/401—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices using transistors forming cells needing refreshing or charge regeneration, i.e. dynamic cells
- G11C11/4063—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing
- G11C11/407—Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing for memory cells of the field-effect type
- G11C11/409—Read-write [R-W] circuits
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- 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
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- G—PHYSICS
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- 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
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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
- G11C16/0408—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells containing floating gate transistors
- G11C16/0425—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells containing floating gate transistors comprising cells containing a merged floating gate and select transistor
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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
- G11C16/0466—Erasable programmable read-only memories electrically programmable using variable threshold transistors, e.g. FAMOS comprising cells with charge storage in an insulating layer, e.g. metal-nitride-oxide-silicon [MNOS], silicon-oxide-nitride-oxide-silicon [SONOS]
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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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
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- G11C16/02—Erasable programmable read-only memories electrically programmable
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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
- G11C16/24—Bit-line control circuits
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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
- G11C16/30—Power supply circuits
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- G—PHYSICS
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- 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
- G11C16/32—Timing circuits
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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
- G11C16/3418—Disturbance prevention or evaluation; Refreshing of disturbed memory data
- G11C16/3427—Circuits or methods to prevent or reduce disturbance of the state of a memory cell when neighbouring cells are read or written
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/14—Dummy cell management; Sense reference voltage generators
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C8/00—Arrangements for selecting an address in a digital store
- G11C8/14—Word line organisation; Word line lay-out
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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
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Abstract
Description
ステップS402:プログラム動作の前に、コントローラ12は、ワード線WL(1)~WL(N)に低電圧VIを印加しながら、上位ダミーワード線TDWL、上位選択線TSLおよびビット線BL(p)にプリパルス電圧Vpreを印加する。
ステップS404:プログラム動作の前に、コントローラ12は、ワード線WL(1)~WL(N)に低電圧VIを印加しながら、上位ダミーワード線TDWL、上位選択線TSL、およびビット線BL(p)に低電圧VIを順次印加する。
ステップS406:プログラム動作において、コントローラ12は、選択ワード線にプログラムパルスを印加し、非選択ワード線にパス電圧を印加しながら、上位ダミーワード線TDWLにダミーセル電圧Vdmcを印加する。
Claims (18)
- メモリデバイスを動作させる方法であって、前記メモリデバイスは、上位選択セルと、上位ダミーセルと、メモリセルのストリングとを含み、前記上位選択セルは、ビット線に結合された第1の端子と、上位選択線に結合された制御端子とを有し、前記上位ダミーセルは、前記上位選択セルの第2の端子に結合された第1の端子と、上位ダミーワード線に結合された制御端子とを有し、前記メモリセルのストリングは、前記上位ダミーセルの第2の端子に結合された第1の端子と、それぞれのワード線に結合された制御端子とを有し、前記方法は、
プログラム動作の前に、前記ワード線に低電圧を印加しながら、前記上位ダミーワード線、前記上位選択線および前記ビット線にプリパルス電圧を印加することと、その後、前記ワード線に前記低電圧を印加しながら、前記上位ダミーワード線、前記上位選択線および前記ビット線に前記低電圧を順次印加することと、を含む、方法。 - 前記プログラム動作において、前記ワード線の選択ワード線にプログラムパルスを印加しながら、前記上位ダミーワード線に上位ダミーセル電圧を印加することをさらに含む、
請求項1に記載の方法。 - 前記プリパルス電圧は前記上位ダミーセル電圧よりも小さい、請求項2に記載の方法。
- 前記プログラム動作において、前記ワード線の非選択ワード線にパス電圧を印加することをさらに含む、
請求項2に記載の方法。 - 前記パス電圧は前記プログラム電圧よりも小さい、請求項4に記載の方法。
- 前記プログラム動作において、前記ビット線および前記上位選択線に前記低電圧を印加して、前記メモリセルのストリングを非選択にすることをさらに含む、
請求項2に記載の方法。 - 前記低電圧は接地電圧である、請求項1に記載の方法。
- 前記メモリデバイスは、3次元NANDフラッシュメモリデバイスである、請求項1に記載の方法。
- 前記メモリデバイスは、下位ダミーワード線と、下位選択線と、接地電圧を受け取るように構成されたソース線と、下位ダミーセルと、下位選択セルとをさらに含み、前記下位ダミーセルは、前記メモリセルのストリングの前記第2の端子に結合された第1の端子と、前記下位ダミーワード線に結合された制御端子と、第2の端子とを有し、前記下位選択セルは、前記下位ダミーセルの前記第2の端子に結合された第1の端子と、前記下位選択線に結合された制御端子と、前記ソース線に結合された第2の端子とを有し、
前記方法は、前記ワード線に前記低電圧を印加しながら、前記下位ダミーワード線、前記下位選択線および前記ソース線に前記プリパルス電圧を印加することと、前記ワード線に前記低電圧を印加しながら、前記下位ダミーワード線、前記下位選択線および前記ソース線に前記低電圧を順次印加することと、をさらに含む、
請求項1に記載の方法。 - メモリデバイスであって、
ビット線と、
上位選択線と、
上位ダミーワード線と、
ワード線と、
前記ビット線に結合された第1の端子、前記上位選択線に結合された制御端子、および第2の端子を含む上位選択セルと、
前記上位選択セルの前記第2の端子に結合された第1の端子、前記上位ダミーワード線に結合された制御端子、および第2の端子を含む上位ダミーセルと、
前記上位ダミーセルの前記第2の端子に結合された第1の端子、前記それぞれのワード線に結合された制御端子、および第2の端子を含むメモリセルのストリングと、
前記ビット線、前記上位選択線、前記上位ダミーワード線および前記ワード線に結合され、プログラム動作の前に、前記ワード線に低電圧を印加しながら、前記上位ダミーワード線、前記上位選択線および前記ビット線にプリパルス電圧を印加し、その後、前記ワード線に前記低電圧を印加しながら、前記上位ダミーワード線、前記上位選択線および前記ビット線に前記低電圧を順次印加するように構成されたコントローラと、を含む、メモリデバイス。 - 前記プログラム動作において、前記コントローラは、前記ワード線の選択ワード線にプログラムパルスを印加しながら、前記上位ダミーワード線に上位ダミーセル電圧を印加するようにさらに構成される、請求項10に記載のメモリデバイス。
- 前記プリパルス電圧は前記上位ダミーセル電圧よりも小さい、請求項11に記載のメモリデバイス。
- 前記プログラム動作において、前記コントローラは、前記ワード線の非選択ワード線にパス電圧を印加するようにさらに構成される、請求項11に記載のメモリデバイス。
- 前記パス電圧は前記プログラム電圧よりも小さい、請求項13に記載のメモリデバイス。
- 前記プログラム動作において、前記コントローラは、前記ビット線および前記上位選択線に前記低電圧を印加して、前記メモリセルのストリングを非選択にするようにさらに構成される、請求項11に記載のメモリデバイス。
- 前記低電圧は接地電圧である、請求項10に記載のメモリデバイス。
- 前記メモリデバイスは、3次元NANDフラッシュメモリデバイスである、請求項10に記載のメモリデバイス。
- 下位ダミーワード線と、
下位選択線と、
接地電圧を受け取るように構成されたソース線と、
前記メモリセルのストリングの前記第2の端子に結合された第1の端子、前記下位ダミーワード線に結合された制御端子、および第2の端子を含む下位ダミーセルと、
前記下位ダミーセルの前記第2の端子に結合された第1の端子、前記下位選択線に結合された制御端子、前記およびソース線に結合された第2の端子を含む下位選択セルと、をさらに含み、
前記コントローラは、前記下位ダミーワード線、前記下位選択線および前記ソース線にさらに結合され、前記プログラム動作の前に、前記ワード線に前記低電圧を印加しながら、前記下位ダミーワード線、前記下位選択線および前記ソース線に前記プリパルス電圧を印加し、前記ワード線に前記低電圧を印加しながら、前記下位ダミーワード線、前記下位選択線および前記ソース線に前記低電圧を順次印加するように構成される、
請求項10に記載のメモリデバイス。
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US20230197164A1 (en) * | 2021-12-21 | 2023-06-22 | Micron Technology, Inc. | Bias voltage schemes during pre-programming and programming phases |
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TWI728674B (zh) | 2021-05-21 |
EP3891747A4 (en) | 2022-08-03 |
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US11676646B2 (en) | 2023-06-13 |
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US11222674B2 (en) | 2022-01-11 |
CN113066518A (zh) | 2021-07-02 |
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