JP6431436B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6431436B2 JP6431436B2 JP2015087715A JP2015087715A JP6431436B2 JP 6431436 B2 JP6431436 B2 JP 6431436B2 JP 2015087715 A JP2015087715 A JP 2015087715A JP 2015087715 A JP2015087715 A JP 2015087715A JP 6431436 B2 JP6431436 B2 JP 6431436B2
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- transistor
- wiring
- potential
- film
- oxide semiconductor
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Classifications
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1203—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body the substrate comprising an insulating body on a semiconductor body, e.g. SOI
- H01L27/1207—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body the substrate comprising an insulating body on a semiconductor body, e.g. SOI combined with devices in contact with the semiconductor body, i.e. bulk/SOI hybrid circuits
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
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Description
本実施の形態では、半導体装置であるメモリセルMCの構成例、動作、及びメモリセルMCを含むブロック図の一例について説明する。
図1には、メモリセルMCを有する半導体装置10の構成例について示す。
次いでメモリセルMCの動作例について説明する。
上述したメモリセルMCは、図4に一例として示すブロック図の構成で動作を行えばよい。
次いで上記説明したメモリセルMCのデータ書き込み時、データ読み出し時の各信号、配線の電位を示すタイミングチャートについて説明する。図5では、データ書き込みについてのタイミングチャートについて示す。図6では、データ読み出しについてのタイミングチャートについて示す。
本実施の形態では、実施の形態1で説明したメモリセルMCを構成する別の回路構成例、及びスイッチ53、54の変形例について説明する。
図7(A)乃至(D)には、図1で説明したメモリセルMCが取り得る回路構成の一例を示す。
図1の構成例では、データ読み出し時において配線BLに与える電位を、電位VBL又はグラウンド電位GNDとし、スイッチ53,54を切り替えてそれぞれの電位を切り替える構成を説明したが、他の構成でもよい。
本実施の形態では、上記実施の形態で説明したオフ電流の低いOSトランジスタ、及びOSトランジスタの半導体層が有する酸化物半導体について説明する。
上記実施の形態で説明したオフ電流の低いトランジスタとして挙げたOSトランジスタは、Siトランジスタよりも低いオフ電流が得られる。
次いで、OSトランジスタの半導体層に用いることのできる酸化物半導体について説明する。
本実施の形態では、メモリセルMCのレイアウト図、レイアウト図に対応する回路図、及び断面模式図の一例について、図13、図14を参照して説明する。
上記実施の形態で開示された、導電層や半導体層はスパッタ法により形成することができるが、他の方法、例えば、熱CVD法により形成してもよい。熱CVD法の例としてMOCVD(Metal Organic Chemical Vapor Deposition)法やALD(Atomic Layer Deposition)法を使っても良い。
本実施の形態では、上述の実施の形態で説明した半導体装置を電子部品に適用する例、及び該電子部品を具備する電子機器に適用する例について、図15、図16を用いて説明する。
CT3 開口部
CT4 開口部
CT5 開口部
R1 時刻
R2 時刻
R3 時刻
R4 時刻
R5 時刻
W1 時刻
W2 時刻
W3 時刻
W4 時刻
W5 時刻
W6 時刻
W7 時刻
10 半導体装置
11 トランジスタ
11_A トランジスタ
11_B トランジスタ
12 トランジスタ
12_A トランジスタ
13 容量素子
20_A トランジスタ
20_B トランジスタ
21 基板
22 半導体層
23 絶縁層
24 導電層
25 絶縁層
26 導電層
27 導電層
28 絶縁層
29 導電層
30 導電層
31 絶縁層
32 半導体層
33 導電層
34 導電層
35 導電層
36 絶縁層
37 導電層
38 導電層
39 絶縁層
40 導電層
41 導電層
42 導電層
43 絶縁層
44 導電層
51 トランジスタ
52 スイッチ
53 スイッチ
54 スイッチ
55 配線
56 配線
57 配線
58 配線
59 配線
60 配線
61 配線
62 配線
71 スイッチ
72 トランジスタ
73 スイッチ
74 トランジスタ
75 トランジスタ
76 配線
79 配線
80 配線
81 配線
82 配線
83 配線
84 配線
200 半導体装置
201 メモリセルアレイ
202 行方向ドライバー
203 列方向ドライバー
204 セレクタ
205 A/Dコンバータ
206 コンパレータ
210 電子銃室
212 光学系
214 試料室
216 光学系
218 カメラ
220 観察室
222 フィルム室
224 電子
228 物質
229 蛍光板
700 電子部品
701 リード
702 プリント基板
703 回路部
704 回路基板
901 筐体
902 筐体
903a 表示部
903b 表示部
904 選択ボタン
905 キーボード
910 電子書籍
911 筐体
912 筐体
913 表示部
914 表示部
915 軸部
916 電源
917 操作キー
918 スピーカー
920 テレビジョン装置
921 筐体
922 表示部
923 スタンド
924 リモコン操作機
930 本体
931 表示部
932 スピーカー
933 マイク
934 操作ボタン
941 本体
942 表示部
943 操作スイッチ
Claims (2)
- メモリセルと、第1の配線と、第2の配線と、を有する半導体装置であって、
前記メモリセルは、第1のトランジスタと、第2のトランジスタと、容量素子と、を有し、
前記メモリセルは、前記容量素子の一方の電極と、前記第1のトランジスタのゲートと、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が電気的に接続されたノードに、データ電圧に応じた電荷を保持することができる機能を有し、
前記データ電圧の前記第1の配線への読み出しのステップは、第1のステップと、第2のステップと、第3のステップと、を有し、
前記第1のステップは、前記第1の配線の電位をプリチャージするステップを有し、
前記第2のステップは、前記第1のトランジスタを介して前記第1の配線の電位を、前記データ電圧に従って前記第2の配線に放電するステップを有し、
前記第3のステップは、前記第1の配線の電位を、第1の電位に近づけるステップを有し、
前記第1の電位は、前記ノードの電位に前記第1のトランジスタの閾値電圧が加わった電位であり、
前記第2のステップにおいて、前記第2の配線の電位を、前記第1の配線の電位の変化に従って切り替えることを特徴とする半導体装置。 - メモリセルと、第1の配線と、第2の配線と、を有する半導体装置であって、
前記メモリセルは、第1のトランジスタと、第2のトランジスタと、容量素子と、を有し、
前記メモリセルは、前記容量素子の一方の電極と、前記第1のトランジスタのゲートと、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が電気的に接続されたノードに、データ電圧に応じた電荷を保持することができる機能を有し、
前記データ電圧の前記第1の配線への読み出しのステップは、第1のステップと、第2のステップと、第3のステップと、を有し、
前記第1のステップは、前記第1の配線の電位をプリチャージするステップを有し、
前記第2のステップは、前記第1のトランジスタを介して前記第1の配線の電位を、前記データ電圧に従って前記第2の配線に放電するステップを有し、
前記第3のステップは、前記第1の配線の電位を、第1の電位に近づけるステップを有し、
前記第1の電位は、前記ノードの電位に前記第1のトランジスタの閾値電圧が加わった電位であり、
前記第2のステップにおいて、前記第2の配線の電位を、前記第1の配線の電位との差が任意の電圧以下になるように制御することを特徴とする半導体装置。
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