JP6114504B2 - 半導体記憶装置 - Google Patents
半導体記憶装置 Download PDFInfo
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- JP6114504B2 JP6114504B2 JP2012100730A JP2012100730A JP6114504B2 JP 6114504 B2 JP6114504 B2 JP 6114504B2 JP 2012100730 A JP2012100730 A JP 2012100730A JP 2012100730 A JP2012100730 A JP 2012100730A JP 6114504 B2 JP6114504 B2 JP 6114504B2
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- transistor
- film
- oxide semiconductor
- oxide
- capacitor
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Classifications
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- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- 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
- G11C11/4099—Dummy cell treatment; Reference voltage generators
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/06—Arrangements for interconnecting storage elements electrically, e.g. by wiring
- G11C5/10—Arrangements for interconnecting storage elements electrically, e.g. by wiring for interconnecting capacitors
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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
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- 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
-
- 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
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- 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
- G11C11/403—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 with charge regeneration common to a multiplicity of memory cells, i.e. external refresh
- G11C11/404—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 with charge regeneration common to a multiplicity of memory cells, i.e. external refresh with one charge-transfer gate, e.g. MOS transistor, per cell
-
- 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
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- 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
- G11C11/406—Management or control of the refreshing or charge-regeneration cycles
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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
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- 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
- G11C11/4091—Sense or sense/refresh amplifiers, or associated sense circuitry, e.g. for coupled bit-line precharging, equalising or isolating
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/30—DRAM devices comprising one-transistor - one-capacitor [1T-1C] memory cells
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/50—Peripheral circuit region structures
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- H—ELECTRICITY
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/411—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs characterised by materials, geometry or structure of the substrates
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/421—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer
- H10D86/423—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs having a particular composition, shape or crystalline structure of the active layer comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B12/00—Dynamic random access memory [DRAM] devices
- H10B12/01—Manufacture or treatment
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- H10B12/05—Making the transistor
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Description
本実施の形態では、本発明の一態様を適用した半導体記憶装置について説明する。
上式の両辺をVgで割り、更に両辺の対数を取ると、以下のようになる。
本実施の形態では、実施の形態1に示したメモリモジュール100とは異なる構造のメモリモジュール200について図2を用いて説明する。
本実施の形態では、実施の形態1および実施の形態2に示したメモリモジュール100およびメモリモジュール200とは異なる構造のメモリモジュール300について図3を用いて説明する。
実施の形態1乃至実施の形態3で示した半導体記憶装置を少なくとも一部に用いてCPU(Central Processing Unit)を構成することができる。
本実施の形態では、実施の形態1乃至実施の形態4の少なくともいずれかを適用した電子機器の例について説明する。
110 ローデコーダ
112 カラムデコーダ
116 コンパレータ
118 抵抗素子
130 第1のキャパシタ
132 第2のキャパシタ
140 第1のトランジスタ
142 第2のトランジスタ
144 第3のトランジスタ
150 メモリセル
152 参照セル
160 ビット線
170 ワード線
180 メモリセルアレイ
190 比較回路
200 メモリモジュール
201 基板
202 下地絶縁膜
203 下地絶縁膜
204 低抵抗領域
206 高抵抗領域
207 高抵抗領域
208 ゲート絶縁膜
209 ゲート絶縁膜
210 ゲート電極
211 ゲート電極
212 層間絶縁膜
213 層間絶縁膜
214 電極
280 メモリセルアレイ
282 参照セル群
300 メモリモジュール
352 参照セル
500 基板
502 下地絶縁膜
504 保護絶縁膜
506 酸化物半導体膜
506a 高抵抗領域
506b 低抵抗領域
508 ゲート絶縁膜
510 ゲート電極
512 側壁絶縁膜
514 電極
516 層間絶縁膜
518 配線
600 基板
602 下地絶縁膜
606 酸化物半導体膜
608 ゲート絶縁膜
610 ゲート電極
614 電極
616 層間絶縁膜
618 配線
620 保護膜
1010 下地絶縁膜
1020 埋め込み絶縁物
1030a 半導体領域
1030b 半導体領域
1030c 半導体領域
1040 ゲート絶縁膜
1050 ゲート
1060a 側壁絶縁物
1060b 側壁絶縁物
1070 絶縁物
1080a ソース
1080b ドレイン
1141 スイッチング素子
1142 半導体記憶装置
1143 半導体記憶装置群
1189 ROMインターフェース
1190 基板
1191 ALU
1192 ALUコントローラ
1193 インストラクションデコーダ
1194 インタラプトコントローラ
1195 タイミングコントローラ
1196 レジスタ
1197 レジスタコントローラ
1198 バスインターフェース
1199 ROM
9300 筐体
9301 ボタン
9302 マイクロフォン
9303 表示部
9304 スピーカ
9305 カメラ
9320 筐体
9321 ボタン
9322 マイクロフォン
9323 表示部
Claims (2)
- n行m列(n、mは自然数)のマトリクス状に設けられた複数のメモリセルを有するメモリセルアレイと、
前記メモリセルアレイと電気的に接続されるリフレッシュタイミング検出回路と、を有し、
前記メモリセルは、第1の酸化物半導体をチャネルとして有する第1のトランジスタと、前記第1のトランジスタのソース又はドレインの一方と電気的に接続される第1のキャパシタとを有し、
前記リフレッシュタイミング検出回路は、参照セルとコンパレータとを有し、
前記参照セルは、第2の酸化物半導体をチャネルとして有する第2のトランジスタと、前記第2のトランジスタのソース又はドレインの一方と電気的に接続される第2のキャパシタと、前記第2のキャパシタと電気的に接続される第3のトランジスタとを有し、
前記参照セルは、前記コンパレータに電気的に接続され、
i行目(1≦i≦n、iは自然数)のメモリセルは全て、前記第1のトランジスタのゲートがi行目のワード線に電気的に接続され、
前記第2のトランジスタのゲートは、前記i行目のワード線に電気的に接続され、
i行目(1≦i≦n、iは自然数)のメモリセルが有する前記第1のトランジスタのソース又はドレインの他方は、それぞれ、複数のビット線の一に電気的に接続され、
前記第2のトランジスタのソース又はドレインの他方は、前記複数のビット線の一に電気的に接続され、
前記i行目のメモリセルが有する前記第1のトランジスタ同士は、等間隔で行方向に並んでおり、
前記第2のトランジスタは、i行m列のメモリセルの前記第1のトランジスタに対して、前記i行目のメモリセルが有する前記第1のトランジスタ同士の間隔と同様の間隔をおいて行方向に並ぶ半導体記憶装置。 - n行m列(n、mは自然数)のマトリクス状に設けられた複数のメモリセルを有するメモリセルアレイと、
前記メモリセルアレイと電気的に接続されるリフレッシュタイミング検出回路と、を有し、
前記メモリセルは、第1の酸化物半導体をチャネルとして有する第1のトランジスタと、前記第1のトランジスタのソース又はドレインの一方と電気的に接続される第1のキャパシタとを有し、
前記リフレッシュタイミング検出回路は、参照セルとコンパレータとを有し、
前記参照セルは、第2の酸化物半導体をチャネルとして有する第2のトランジスタと、前記第2のトランジスタのソース又はドレインの一方と電気的に接続される第2のキャパシタと、前記第2のキャパシタと電気的に接続される第3のトランジスタとを有し、
前記参照セルは、前記コンパレータに電気的に接続され、
i行目(1≦i≦n、iは自然数)のメモリセルは全て、前記第1のトランジスタのゲートがi行目のワード線に電気的に接続され、
前記第2のトランジスタのゲートは、前記i行目のワード線に電気的に接続され、
i行目(1≦i≦n、iは自然数)のメモリセルが有する前記第1のトランジスタのソース又はドレインの他方は、それぞれ、複数のビット線の一に電気的に接続され、
前記第2のトランジスタのソース又はドレインの他方は、前記複数のビット線の一に電気的に接続され、
前記i行目のメモリセルが有する前記第1のトランジスタ同士は、等間隔で行方向に並んでおり、
前記第2のトランジスタは、i行m列のメモリセルの前記第1のトランジスタに対して、前記i行目のメモリセルが有する前記第1のトランジスタ同士の間隔と同様の間隔をおいて行方向に並び、
前記第2のキャパシタの保持容量は、前記第1のキャパシタの保持容量よりも小さいことを特徴とする半導体記憶装置。
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