JP2012079399A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2012079399A JP2012079399A JP2011190402A JP2011190402A JP2012079399A JP 2012079399 A JP2012079399 A JP 2012079399A JP 2011190402 A JP2011190402 A JP 2011190402A JP 2011190402 A JP2011190402 A JP 2011190402A JP 2012079399 A JP2012079399 A JP 2012079399A
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- transistor
- oxide semiconductor
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- oxide
- potential
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- 239000003870 refractory metal Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000005477 sputtering target Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
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- 230000005641 tunneling Effects 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】酸化物半導体層を含むトランジスタを用いたメモリセルに対して、ベリファイ動作と、読み出しを行う際に、異なるしきい値電圧を示すデュアルゲート駆動のトランジスタを抵抗素子として用いることで、一系統の基準電位回路のみで安定したベリファイ動作、及び読み出し動作が可能となる。
【選択図】図1
Description
本実施の形態では、開示する発明の一態様に係る半導体装置について、図1乃至図3を参照して説明する。なお、回路図においては、酸化物半導体を用いたトランジスタであることを示すために、OSの符号を併せて付す場合がある。
はじめに回路構成について、図1を参照して説明する。図1に示す回路構成は、NOR型のメモリ(1bit/cell)であり、複数のメモリセルがマトリクス状に配置されたメモリセルアレイ253と、基準電位回路250と、電位比較回路254と、駆動の制御を行う制御回路259と、トランジスタにより形成された抵抗素子260により構成されている。
次に、図1の回路構成を用いて具体的な駆動方法について、以下説明を行う。
次に、図1に示した回路構成と異なる回路構成及び駆動方法について、図4乃至図8を参照して説明する。
図1と図4の相違点は、図1に示した回路構成は1bit/cellであったのに対し、図4に示す回路構成は2bit/cellの多値メモリ回路となる。
本実施の形態では、開示する発明の一態様に係る半導体装置の構成およびその作製方法について、図9乃至図13を参照して説明する。
図9は、図1に示すメモリセルアレイ253が有する第1のトランジスタ211、及び第2のトランジスタ212、または図4に示すメモリセルアレイ353が有する第1のトランジスタ311、及び第2のトランジスタ312に対応する半導体装置の構成の一例である。図9(A)には、半導体装置の断面を、図9(B)には、半導体装置の平面を、それぞれ示す。ここで、図9(A)は、図9(B)のA1−A2における断面に相当する。なお、図9(B)では、煩雑になることを避けるため、当該半導体装置の構成要素の一部(絶縁層154、絶縁層172、配線171、及び配線158)を省略している。図9(A)および図9(B)に示される半導体装置は、下部に第1の半導体材料を用いたトランジスタ160を有し、上部に第2の半導体材料を用いたトランジスタ162を有するものである。
次に、ゲート電極110、電極126、絶縁層128などの上に導電層を形成し、該導電層を選択的にエッチングして、ソース電極142a、ドレイン電極142bを形成する(図12(A)参照)。
本実施の形態では、本明細書に開示する半導体装置に適用できるトランジスタの例を示す。本明細書に開示する半導体装置に適用できるトランジスタの構造は特に限定されず、例えばトップゲート構造、又はボトムゲート構造のスタガ型及びプレーナ型などを用いることができる。また、トランジスタはチャネル形成領域が一つ形成されるシングルゲート構造でも、2つ形成されるダブルゲート構造もしくは3つ形成されるトリプルゲート構造であっても良い。また、チャネル領域の上下にゲート絶縁層を介して配置された2つのゲート電極層を有する、デュアルゲート型でもよい。
上記実施の形態1乃至4において、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層の一形態を、図16を用いて説明する。
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機器に適用する場合について、図17を用いて説明する。本実施の形態では、コンピュータ、携帯電話機(携帯電話、携帯電話装置ともいう)、携帯情報端末(携帯型ゲーム機、音響再生装置なども含む)、デジタルカメラ、デジタルビデオカメラ、電子ペーパー、テレビジョン装置(テレビ、またはテレビジョン受信機ともいう)などの電子機器に、上述の半導体装置を適用する場合について説明する。
102 保護層
104 半導体領域
106 素子分離絶縁層
108 ゲート絶縁層
108a ゲート絶縁層
110 ゲート電極
110a ゲート電極
116 チャネル形成領域
120 不純物領域
120a 不純物領域
120b 不純物領域
122 金属層
124 金属化合物領域
124a 金属化合物領域
124b 金属化合物領域
126 電極
128 絶縁層
140 絶縁層
142a ソース電極
142b ドレイン電極
144 酸化物半導体層
146 ゲート絶縁層
148 ゲート電極
150 絶縁層
152 電極
154 絶縁層
156 電極
158 配線
160 トランジスタ
162 トランジスタ
164 容量素子
170 電極
171 配線
172 絶縁層
202 トランジスタ
203 ノード
204 ノード
211 トランジスタ
212 トランジスタ
213 容量素子
214 ビット線
215 酸化物半導体用ビット線
216 酸化物半導体用ワード線
217 ワード線
250 基準電位回路
251 ワード線選択回路
252 ビット線選択回路
253 メモリセルアレイ
254 電位比較回路
255 出力
256 ラッチ回路
257 電源制御回路
258 状態遷移回路
259 制御回路
260 抵抗素子
280 実線
282 実線
300 タイミングチャート
302 タイミングチャート
303 ノード
311 トランジスタ
312 トランジスタ
313 容量素子
314 ビット線
315 酸化物半導体用ビット線
316 酸化物半導体用ワード線
317 ワード線
350 基準電位回路
351 ワード線選択回路
352 ビット線選択回路
353 メモリセルアレイ
354a 電位比較回路
354b 電位比較回路
354c 電位比較回路
355 出力
356 ラッチ回路
357 電位制御回路
358 状態遷移回路
359 制御回路
360 基準電位回路
370 基準電位回路
380 抵抗素子
400 絶縁層
401 ゲート電極層
402 ゲート絶縁層
403 酸化物半導体層
403b 酸化物半導体層
404a 酸化物導電層
404b 酸化物導電層
405a ソース電極層
405b ドレイン電極層
407 絶縁層
409 絶縁層
410 トランジスタ
420 トランジスタ
427 絶縁層
430 トランジスタ
436a 配線層
436b 配線層
437 絶縁層
440 トランジスタ
441 トランジスタ
442 トランジスタ
450a 結晶性酸化物半導体層
450b 結晶性酸化物半導体層
453 酸化物半導体層
701 筐体
702 筐体
703 表示部
704 キーボード
711 本体
712 スタイラス
713 表示部
714 操作ボタン
715 外部インターフェイス
720 電子書籍
721 筐体
723 筐体
725 表示部
727 表示部
731 電源
733 操作キー
735 スピーカー
737 軸部
740 筐体
741 筐体
742 表示パネル
743 スピーカー
744 マイクロフォン
745 操作キー
746 ポインティングデバイス
747 カメラ用レンズ
748 外部接続端子
749 太陽電池セル
750 外部メモリスロット
761 本体
763 接眼部
764 操作スイッチ
765 表示部
766 バッテリー
767 表示部
770 テレビジョン装置
771 筐体
773 表示部
775 スタンド
780 リモコン操作機
Claims (5)
- 第1のゲート端子がワード線に電気的に接続され、第1のソース端子がビット線に電気的に接続され、第1のドレイン端子がソース線に電気的に接続され、半導体材料を含んだ基板により構成された第1のトランジスタと、第2のゲート端子が酸化物半導体用のワード線に電気的に接続され、第2のソース端子が酸化物半導体用ビット線と電気的に接続され、第2のドレイン端子が前記第1のトランジスタの第1のゲート端子に電気的に接続され、酸化物半導体層を含んで構成された第2のトランジスタと、前記第1のトランジスタの第1のゲート端子と前記ワード線に電気的に接続された容量素子と、を有するメモリセルと、
第3のソース端子と、第3のドレイン端子と、第3のゲート端子と、第4のゲート端子からなるデュアルゲート駆動のトランジスタにより構成され、前記第3のソース端子及び第3のゲート端子が、電源電圧が入力される端子に電気的に接続され、前記第3のドレイン端子が、前記ビット線に電気的に接続される抵抗素子と、
基準電位を出力する基準電位回路と、
前記基準電位回路及び前記ビット線と電気的に接続され、該基準電位回路が出力する基準電位と前記ビット線の電位を比較する電位比較回路と、
前記電位比較回路と電気的に接続され、該電位比較回路の出力電位が電源制御回路部及び状態遷移回路部に与えられる制御回路と、
を有し、
前記制御回路において、前記状態遷移回路部は、前記電源制御回路部の入力部及び前記抵抗素子の第4のゲート端子と電気的に接続されて該第4のゲート端子に電位を与え、前記電源制御回路部は、前記酸化物半導体用のビット線と電気的に接続され、前記酸化物半導体用のビット線に電位を与えることを特徴とする半導体装置。 - 前記基準電位回路は、異なる電位を出力する複数の基準電位回路である請求項1に記載の半導体装置。
- 前記半導体材料は、単結晶半導体基板である請求項1または請求項2に記載の半導体装置。
- 前記半導体材料は、シリコンである請求項1乃至請求項3のいずれか一に記載の半導体装置。
- 前記酸化物半導体層は、In、GaおよびZnを含んでなる酸化物半導体材料である請求項1乃至請求項4のいずれか一に記載の半導体装置。
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JP6034941B2 (ja) | 2016-11-30 |
CN102403040A (zh) | 2012-04-04 |
US20120063204A1 (en) | 2012-03-15 |
CN102403040B (zh) | 2016-04-13 |
JP2016042407A (ja) | 2016-03-31 |
US8358530B2 (en) | 2013-01-22 |
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