JP2010514082A - 二重機能データレジスタ - Google Patents
二重機能データレジスタ Download PDFInfo
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- 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
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- G11C17/16—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM using electrically-fusible links
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- G11C17/165—Memory cells which are electrically programmed to cause a change in resistance, e.g. to permit multiple resistance steps to be programmed rather than conduct to or from non-conduct change of fuses and antifuses
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Abstract
Description
12 アンチヒューズデバイス
14 アクセストランジスタ10のゲート
16 アンチヒューズデバイス12の上側プレート
18 アクティブ領域
20 薄膜ゲート酸化膜
22 拡散領域
24 拡散領域
26 アンチヒューズトランジスタ
28 変厚ゲート酸化膜
30 基板チャンネル領域
32 ポリシリコンゲート
34 側壁スペーサ
36 フィールド酸化膜領域
38 拡散領域
40 LDD領域
42 ビットライン接点
44 アクティブ領域
46 輪郭線
48 2つのトランジスタのアンチヒューズメモリセル
50 ポリシリコンゲート
52 厚膜ゲート酸化膜
54 チャンネル
56 拡散領域
58 ビットライン接点
60 共通拡散領域
62 ポリシリコンゲート
64 薄膜ゲート酸化膜
66 チャンネル
68 輪郭線
70 ワードライン接点
72 導電性リンク
80 メモリアレイ
82 ワードラインドライバ
84 列デコーダ及びセンス増幅器
86 データレジスタ
88 第2のデータレジスタ
90 比較ロジック
100 不揮発性メモリデバイス
102 メモリアレイ
104 ワードラインドライバ
106 列デコーダ及びセンス増幅器
108 二重機能直列及び並列データレジスタ
110 クロック制御器
200 第1のレジスタステージ
202 第2のレジスタステージ
204 最後の(n番めの)レジスタステージ
206 プログラム検証ロジック
210 フォルデッドビットラインアンチヒューズメモリアレイ
212、214 n−チャンネルアンチヒューズトランジスタ
216、218 n−チャンネル分離トランジスタ
220 プリチャージ回路
222 基準電荷回路
224 ビットラインセンス増幅器
226、228 n−チャンネルプリチャージトランジスタ
230、232 n−チャンネルステアリングトランジスタ
234 n−チャンネルトランジスタ
236 p−チャンネルプリチャージトランジスタ
238 データ状態補正器
242 ゲートトランジスタ
300 データレジスタステージ
302 データ保存回路
304 ステータス回路
306 自動プログラム抑制回路
310 マスタラッチ
312 スレーブラッチ
314 直列入力ゲートデバイス
318 転送ゲートデバイス
320 並列入力ゲートデバイス
330 XOR(排他的論理和)ロジックゲート
332、334 AND(論理積)ロジックゲート
336 インバータ
340 プリチャージデバイス
342 結合デバイス
350 第1のANDロジックゲート
352 第2のANDロジックゲート
360、362 ANDロジックゲート
366 ORロジックゲート
600 電源投入テストシステム
602 テストメモリアレイ
604 ワードラインドライバ
606 ビットラインセンス増幅器
608 二重機能データレジスタ
620 第1の拡散領域
622 追加の拡散領域
624 ポリシリコンライン
626 拡散ライン
627 拡散領域
628 OD2マスク
629 導電接続
630、632、634 スキュードROMセル
631、633、635 スキュードROMセル
636、638、640 スキュードROMセル
637、639、641 スキュードROMセル
650 レジスタステージ
652 データ保存回路
654 XORゲート
656 ANDゲート
658 直列入力ゲートデバイス
660 転送ゲートデバイス
662 マスタラッチ
664 スレーブラッチ
670、672、674 レジスタステージ
800 レジスタステージ
802 ステータス回路
804 セレクタースイッチ
Claims (23)
- データレジスタステージであって、
直列入力端子から順次にデータをシフト入力すると共に直列出力端子からデータをシフト出力するためにマスタ−スレーブフリップフロップ構成に配置された第1のラッチと第2のラッチとを有するデータ保存回路と、
ローカルステータス信号を提供するために、前記第1のラッチと前記第2のラッチとに保存された対照的な論理状態を検出すると共に、検出された対照的な論理状態に対応する出力を前段のローカルステータス信号と結合するためのステータス回路とを備え、
前記シフト動作が位相調整可能なクロック信号によって制御されると共に、
前記前段のローカルステータス信号が、前段のデータレジスタステージに保存される検出された対照的な論理状態に対応する
ことを特徴とするデータレジスタステージ。 - 前記データ保存回路が、
書き込み信号に応答して並列データを前記第1のラッチの入力に連結するための並列データ入力回路と、
前記第2のラッチの出力に連結された並列データ出力端子と
を更に備えることを特徴とする請求項1に記載のデータレジスタステージ。 - もし前記第2のラッチが特定の論理状態を保存する場合に前記第1のラッチに保存された論理状態を反転するためのプログラム抑制回路を更に備える
ことを特徴とする請求項1に記載のデータレジスタステージ。 - 前記プログラム抑制回路が、電源と前記第1のラッチの入力との間に直列に接続された第1のトランジスタと第2のトランジスタとを備え、
前記第1のトランジスタのゲートがイネーブル信号を受け取ると共に、前記第2のトランジスタのゲートが前記第2のラッチの出力に連結される
ことを特徴とする請求項3に記載のデータレジスタステージ。 - 前記ステータス回路が、
前記第2のラッチの論理状態を、反転した前記第1のラッチの論理状態と比較するためのXORゲートと、
前記ローカルステータス信号を提供するために、前記XORゲートの出力を前記前段のローカルステータス信号と結合するためのANDゲートと
を備えることを特徴とする請求項1に記載のデータレジスタステージ。 - 前記ステータス回路が、第2のローカルステータス信号を提供するために、前記第1のラッチと前記前段のデータレジスタステージの別の第1のラッチとに保存された適合する論理状態を更に検出する
ことを特徴とする請求項1に記載のデータレジスタステージ。 - 前記ステータス回路が、前記第2のローカルステータス信号を提供するために、前記第1のラッチの論理状態を、前記前段のデータレジスタステージの別の第1のラッチの論理状態に対応する第2の前段のローカルステータス信号と結合するためのANDゲートを備える
ことを特徴とする請求項6に記載のデータレジスタステージ。 - 前記第1のラッチの出力が、センス増幅器の入力に連結され、
前記第2のラッチの入力が、センス増幅器の出力に連結される
ことを特徴とする請求項1に記載のデータレジスタステージ。 - 前記位相調整可能なクロック信号が、ソースクロックとアクティブ論理レベルのシフトイネーブル信号とに応答してクロック制御器によって生成された、第1及び第2のクロック信号を含む
ことを特徴とする請求項1に記載のデータレジスタステージ。 - 前記クロック制御器が、
前記ソースクロックと前記アクティブ論理レベルの前記シフトイネーブル信号とに応答して前記第1のクロック信号を生成するための第1のANDゲートと、
反転したソースクロックと前記アクティブ論理レベルの前記シフトイネーブル信号とに応答して前記第2のクロック信号を生成するための第2のANDゲートと
を備えることを特徴とする請求項9に記載のデータレジスタステージ。 - 不揮発性メモリデバイスであって、
ワードラインとビットラインとに接続された不揮発性メモリセルを有するメモリアレイと、
プログラム動作においてプログラムデータに応答してビットラインをバイアスすると共に、読み取りデータを提供するために読み取り動作においてビットラインの読み取り電圧を検知するための列に連結されたビットラインセンス増幅器と、
プログラムデータと読み取りデータを同時に保存するためのデータレジスタとを備え、
前記データレジスタが、保存されたプログラムデータを保存された読み取りデータと比較すると共に、前記保存されたプログラムデータと前記保存された読み取りデータとが対照的な論理レベルである場合に、成功したプログラム動作に対応するステータス信号を提供する
ことを特徴とする不揮発性メモリデバイス。 - 前記データレジスタが、第1のレジスタステージと第2のレジスタステージとを備え、
前記プログラムデータと前記読み取りデータの内の1つを前記第2のレジスタステージに連結された直列出力ポートを通して直列にシフトするために、前記第1のレジスタステージと前記第2のレジスタステージとが相互に直列に接続される
ことを特徴とする請求項11に記載の不揮発性メモリデバイス。 - 前記第1のレジスタステージと前記第2のレジスタステージが、それぞれ、
直列入力端子から順次にデータをシフト入力すると共に直列出力端子からデータをシフト出力するためにマスタ−スレーブフリップフロップ構成に配置された第1のラッチと第2のラッチとを有するデータ保存回路と、
ローカルステータス信号を提供するために、前記第1のラッチと前記第2のラッチとに保存された対照的な論理状態を検出すると共に、検出された対照的な論理状態に対応する出力を前段のローカルステータス信号と結合するためのステータス回路とを備え、
前記シフト動作が位相調整可能なクロック信号によって制御されると共に、
前記前段のローカルステータス信号が、前段のデータレジスタステージに保存される検出された対照的な論理状態に対応する
ことを特徴とする請求項12に記載の不揮発性メモリデバイス。 - ソースクロックとシフトイネーブル信号とに応答して位相調整可能なクロック信号を生成するためのクロック制御器を更に備え、
前記ソースクロックが第1の論理レベルにある間に前記シフトイネーブル信号がアクティブ状態にされる場合に、前記プログラムデータが前記直列出力ポートを通してシフト出力され、
前記ソースクロックが第2の論理レベルにある間に前記シフトイネーブル信号がアクティブ状態にされる場合に、前記読み取りデータが前記直列出力ポートを通してシフト出力される
ことを特徴とする請求項13に記載の不揮発性メモリデバイス。 - 前記データ保存回路が、
書き込み信号に応答して並列データを前記第1のラッチの入力に連結するための並列データ入力回路と、
前記第2のラッチの出力に連結された並列データ出力端子と
を更に備えることを特徴とする請求項13に記載の不揮発性メモリデバイス。 - 前記ステータス回路が、前記第1のラッチと前記第2のラッチとに保存された対照的な論理状態を検出するためのデータ照合回路を備え、
前記データ照合回路が、
前記第2のラッチの論理状態を、反転した前記第1のラッチの論理状態と比較するためのXORゲートと、
前記ローカルステータス信号を提供するために、前記XORゲートの出力を前記前段のローカルステータス信号と結合するためのANDゲートとを備える
ことを特徴とする請求項13に記載の不揮発性メモリデバイス。 - もし前記第2のラッチが首尾よくプログラムされたメモリセルに対応する読み取りデータを保存する場合に前記第1のラッチに保存された論理状態をプログラム抑制論理状態に変更するためのプログラム抑制回路を更に備える
ことを特徴とする請求項16に記載の不揮発性メモリデバイス。 - 前記ステータス回路が、前記第1のラッチと前段の第2のローカルステータス信号とが前記プログラム抑制論理状態に対応する論理状態を有する場合に第2のローカルステータス信号を提供するための再プログラム検証回路を備え、
前記前段の第2のローカルステータス信号が、前記前段のデータレジスタステージによって提供される
ことを特徴とする請求項17に記載の不揮発性メモリデバイス。 - 前記データレジスタが、前記ローカルステータス信号が前記検出された対照的な論理状態に対応する論理レベルである場合に成功したプログラム動作に対応する前記ステータス信号を提供するためのプログラム検証ロジックを備える
ことを特徴とする請求項18に記載の不揮発性メモリデバイス。 - 前記データレジスタが、前記第2のローカルステータス信号が前記プログラム抑制論理状態に対応する論理レベルである場合に成功したプログラム動作に対応する前記ステータス信号を提供するためのプログラム検証ロジックを備える
ことを特徴とする請求項18に記載の不揮発性メモリデバイス。 - 前記データレジスタが、前記ローカルステータス信号が前記検出された対照的な論理状態に対応する論理レベルであると共に前記第2のローカルステータス信号が前記プログラム抑制論理状態に対応する論理レベルである場合に成功したプログラム動作に対応するステータス信号を提供するためのプログラム検証ロジックを備える
ことを特徴とする請求項18に記載の不揮発性メモリデバイス。 - 前記プログラム抑制回路が、電源と前記第1のラッチの入力との間に直列に接続された第1のトランジスタと第2のトランジスタとを備え、
前記第1のトランジスタのゲートがイネーブル信号を受け取ると共に、前記第2のトランジスタのゲートが前記第2のラッチの出力に連結される
ことを特徴とする請求項17に記載の不揮発性メモリデバイス。 - 前記再プログラム検証回路が、前記第2のローカルステータス信号を提供するために、前記第1のラッチの論理状態を前記前段の第2のローカルステータス信号と結合するためのANDゲートを備える
ことを特徴とする請求項18に記載の不揮発性メモリデバイス。
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US8266483B2 (en) | 2012-09-11 |
US8023338B2 (en) | 2011-09-20 |
TW200836198A (en) | 2008-09-01 |
TWI509611B (zh) | 2015-11-21 |
JP5457195B2 (ja) | 2014-04-02 |
WO2008077243A1 (en) | 2008-07-03 |
CA2645781A1 (en) | 2008-07-13 |
JP2014099239A (ja) | 2014-05-29 |
US20100011266A1 (en) | 2010-01-14 |
JP5671161B2 (ja) | 2015-02-18 |
US8082476B2 (en) | 2011-12-20 |
HK1205344A1 (en) | 2015-12-11 |
EP2122632A4 (en) | 2010-01-27 |
CA2649002C (en) | 2010-04-20 |
EP2814037B1 (en) | 2016-10-26 |
CA2645781C (en) | 2011-04-12 |
CA2649002A1 (en) | 2008-07-03 |
EP2122632A1 (en) | 2009-11-25 |
US20100002527A1 (en) | 2010-01-07 |
EP2122632B1 (en) | 2014-06-25 |
US20090290434A1 (en) | 2009-11-26 |
WO2008077238A1 (en) | 2008-07-03 |
CA2645774C (en) | 2010-01-12 |
EP2814037A1 (en) | 2014-12-17 |
US7940595B2 (en) | 2011-05-10 |
JP2014089796A (ja) | 2014-05-15 |
US20110317804A1 (en) | 2011-12-29 |
WO2008077237A1 (en) | 2008-07-03 |
JP5671162B2 (ja) | 2015-02-18 |
CA2645774A1 (en) | 2008-07-03 |
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