JP6534557B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6534557B2 JP6534557B2 JP2015085631A JP2015085631A JP6534557B2 JP 6534557 B2 JP6534557 B2 JP 6534557B2 JP 2015085631 A JP2015085631 A JP 2015085631A JP 2015085631 A JP2015085631 A JP 2015085631A JP 6534557 B2 JP6534557 B2 JP 6534557B2
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- Prior art keywords
- film
- insulating film
- region
- oxide semiconductor
- conductive film
- Prior art date
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Description
本実施の形態では、本発明の一態様である半導体装置、及びその作製方法について図面を参照して説明する。半導体装置の一例としてトランジスタを用いて説明する。
図1(A)、図1(B)及び図1(C)は、本発明の一態様に係るトランジスタ150の上面図及び断面図である。図1(A)は上面図である。図1(B)及び図1(C)は、図1(A)に示す一点鎖線A1−A2、及び一点鎖線B1−B2に対応する断面図である。なお、図1(A)の上面図では、図の明瞭化のために一部の要素を省いて図示している。
以下では、酸化物半導体の構造について説明する。
まずは、CAAC−OSについて説明する。
次に、nc−OSについて説明する。
a−like OSは、nc−OSと非晶質酸化物半導体との間の構造を有する酸化物半導体である。
以下では、図1に示したトランジスタ150の作製方法について説明する。
以下では、図1などに示したトランジスタ150とは、異なる構造を有するトランジスタ250について説明する。図11(A)、図11(B)及び図11(C)は、本発明の一態様に係るトランジスタ250の上面図及び断面図である。図11(A)は上面図である。図11(B)及び図11(C)は、図11(A)に示す一点鎖線A1−A2、及び一点鎖線B1−B2に対応する断面図である。なお、図11(A)の上面図では、図の明瞭化のために一部の要素を省いて図示している。
以下では、図11に示したトランジスタ250の作製方法について説明する。
以下では、先に示したトランジスタとは、異なる構造を有するトランジスタ350について説明する。図15(A)、図15(B)及び図15(C)は、本発明の一態様に係るトランジスタ350の上面図及び断面図である。図15(A)は上面図である。図15(B)及び図15(C)は、図15(A)に示す一点鎖線A1−A2、及び一点鎖線B1−B2に対応する断面図である。なお、図15(A)の上面図では、図の明瞭化のために一部の要素を省いて図示している。
以下では、図15に示したトランジスタ350の作製方法について説明する。
本実施の形態においては、先の実施の形態で例示したトランジスタを有する表示装置の一例について、図18乃至図20を用いて以下説明を行う。
図19及び図20に示す表示装置700は、引き回し配線部711と、画素部702と、ソースドライバ回路部704と、FPC端子部708と、を有する。また、引き回し配線部711は、信号線710を有する。また、画素部702は、トランジスタ750及び容量素子790を有する。また、ソースドライバ回路部704は、トランジスタ752を有する。
図19に示す表示装置700は、液晶素子775を有する。液晶素子775は、導電膜772、導電膜774、及び液晶層776を有する。導電膜774は、第2の基板705側に設けられ、対向電極としての機能を有する。図19に示す表示装置700は、導電膜772と導電膜774に印加される電圧によって、液晶層776の配向状態が変わることによって光の透過、非透過が制御され画像を表示することができる。
図20に示す表示装置700は、発光素子782を有する。発光素子782は、導電膜784、EL層786、及び導電膜788を有する。図20に示す表示装置700は、発光素子782が有するEL層786が発光することによって、画像を表示することができる。
本実施の形態では、本発明の一態様の半導体装置を有する表示装置について、図21を用いて説明を行う。
本実施の形態では、本発明の一態様の半導体装置を有する表示モジュール及び電子機器について、図22及び図23を用いて説明を行う。
101 絶縁膜
102 絶縁膜
102a 絶縁膜
102b 絶縁膜
104 導電膜
106 半導体膜
106a 半導体膜
106b 半導体膜
106c 半導体膜
110a 絶縁膜
110b 絶縁膜
112 絶縁膜
114 導電膜
116a 導電膜
116b 導電膜
150 トランジスタ
208 低抵抗領域
208a 低抵抗領域
208b 低抵抗領域
208c チャネル形成領域
210 絶縁膜
210a 絶縁膜
210b 絶縁膜
250 トランジスタ
310a 絶縁膜
310b 絶縁膜
350 トランジスタ
501 画素回路
502 画素部
504 駆動回路部
504a ゲートドライバ
504b ソースドライバ
506 保護回路
507 端子部
550 トランジスタ
552 トランジスタ
554 トランジスタ
560 容量素子
562 容量素子
570 液晶素子
572 発光素子
700 表示装置
701 基板
702 画素部
704 ソースドライバ回路部
705 基板
706 ゲートドライバ回路部
708 FPC端子部
710 信号線
711 配線部
712 シール材
716 FPC
730 絶縁膜
732 封止膜
734 絶縁膜
736 着色膜
738 遮光膜
750 トランジスタ
752 トランジスタ
760 接続電極
764 絶縁膜
766 絶縁膜
770 平坦化絶縁膜
772 導電膜
774 導電膜
775 液晶素子
776 液晶層
778 構造体
780 異方性導電膜
782 発光素子
784 導電膜
786 EL層
788 導電膜
790 容量素子
5100 ペレット
5120 基板
5161 領域
8000 表示モジュール
8001 上部カバー
8002 下部カバー
8003 FPC
8004 タッチパネル
8005 FPC
8006 表示パネル
8007 バックライトユニット
8008 光源
8009 フレーム
8010 プリント基板
8011 バッテリー
9000 筐体
9001 表示部
9003 スピーカー
9005 操作キー
9006 接続端子
9007 センサ
9008 マイクロフォン
9050 操作ボタン
9051 情報
9052 情報
9053 情報
9054 情報
9055 ヒンジ
9100 携帯情報端末
9101 携帯情報端末
9102 携帯情報端末
9200 携帯情報端末
9201 携帯情報端末
Claims (7)
- 酸化物半導体膜と、第1の導電膜と、第2の導電膜と、第3の導電膜と、第1の絶縁膜と、第2の絶縁膜と、第3の絶縁膜と、を有し、
前記酸化物半導体膜は、第1の領域と、第2の領域と、第3の領域と、第4の領域と、第5の領域と、を有し、
前記第1の領域は、前記第1の導電膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第2の領域は、前記第1の絶縁膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第3の領域は、前記第3の絶縁膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第4の領域は、前記第2の絶縁膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第5の領域は、前記第2の導電膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第1の絶縁膜は、前記第1の導電膜上及び前記酸化物半導体膜上に設けられ、
前記第2の絶縁膜は、前記第2の導電膜上及び前記酸化物半導体膜上に設けられ、
前記第3の絶縁膜は、前記第1の絶縁膜上、前記第2の絶縁膜上及び前記酸化物半導体膜上に設けられ、
前記第3の導電膜は、前記酸化物半導体膜と前記第3の絶縁膜を介して、重なる領域を有することを特徴とする半導体装置。 - 酸化物半導体膜と、第1の導電膜と、第2の導電膜と、第3の導電膜と、第4の導電膜と、第1の絶縁膜と、第2の絶縁膜と、第3の絶縁膜と、第4の絶縁膜と、を有し、
前記第4の絶縁膜は、前記第4の導電膜上に設けられ、
前記酸化物半導体膜は、前記第4の絶縁膜上に設けられ、
前記酸化物半導体膜は、第1の領域と、第2の領域と、第3の領域と、第4の領域と、第5の領域と、を有し、
前記第1の領域は、前記第1の導電膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第2の領域は、前記第1の絶縁膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第3の領域は、前記第3の絶縁膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第4の領域は、前記第2の絶縁膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第5の領域は、前記第2の導電膜と前記酸化物半導体膜とが互いに接する領域を有し、
前記第1の絶縁膜は、前記第1の導電膜上及び前記酸化物半導体膜上に設けられ、
前記第2の絶縁膜は、前記第2の導電膜上及び前記酸化物半導体膜上に設けられ、
前記第3の絶縁膜は、前記第1の絶縁膜上、前記第2の絶縁膜上及び前記酸化物半導体膜上に設けられ、
前記第3の導電膜は、前記酸化物半導体膜と前記第3の絶縁膜を介して、重なる領域を有することを特徴とする半導体装置。 - 請求項1または請求項2において、
前記第1の絶縁膜及び前記第2の絶縁膜は、水素を有し、
前記第2の領域は、前記第3の領域よりも、抵抗値が低い領域を有し、
前記第4の領域は、前記第3の領域よりも、抵抗値が低い領域を有することを特徴とする半導体装置。 - チャネル形成領域を有する、酸化物半導体膜と、
前記酸化物半導体膜と電気的に接続された、ソース電極と、
前記酸化物半導体膜と電気的に接続された、ドレイン電極と、
前記ソース電極の上面、及び前記チャネル形成領域側の側面と重なる領域を有する、第1の絶縁膜と、
前記ドレイン電極の上面、及び前記チャネル形成領域側の側面と重なる領域を有する、第2の絶縁膜と、
前記酸化物半導体膜、前記第1の絶縁膜及び前記第2の絶縁膜上に設けられた、第3の絶縁膜と、
前記第3の絶縁膜上の、ゲート電極と、を有し、
前記第1の絶縁膜は、前記酸化物半導体膜と接する領域を有し、
前記第2の絶縁膜は、前記酸化物半導体膜と接する領域を有し、
前記第3の絶縁膜は、前記酸化物半導体膜と接する領域を有し、
前記ゲート電極は、前記第3の絶縁膜及び前記第1の絶縁膜を介して、前記ソース電極と重なる領域を有し、
前記ゲート電極は、前記第3の絶縁膜及び前記第2の絶縁膜を介して、前記ドレイン電極と重なる領域を有することを特徴とする半導体装置。 - 第1のゲート電極と、
前記第1のゲート電極上の、第4の絶縁膜と、
前記第4の絶縁膜上の、チャネル形成領域を有する、酸化物半導体膜と、
前記酸化物半導体膜と電気的に接続された、ソース電極と、
前記酸化物半導体膜と電気的に接続された、ドレイン電極と、
前記ソース電極の上面、及び前記チャネル形成領域側の側面と重なる領域を有する、第1の絶縁膜と、
前記ドレイン電極の上面、及び前記チャネル形成領域側の側面と重なる領域を有する、第2の絶縁膜と、
前記酸化物半導体膜、前記第1の絶縁膜及び前記第2の絶縁膜上に設けられた、第3の絶縁膜と、
前記第3の絶縁膜上の、第2のゲート電極と、を有し、
前記第1の絶縁膜は、前記酸化物半導体膜と接する領域を有し、
前記第2の絶縁膜は、前記酸化物半導体膜と接する領域を有し、
前記第3の絶縁膜は、前記酸化物半導体膜と接する領域を有し、
前記第2のゲート電極は、前記第3の絶縁膜及び前記第1の絶縁膜を介して、前記ソース電極と重なる領域を有し、
前記第2のゲート電極は、前記第3の絶縁膜及び前記第2の絶縁膜を介して、前記ドレイン電極と重なる領域を有することを特徴とする半導体装置。 - 請求項1乃至請求項5のいずれか一において、
前記酸化物半導体膜は、第1の酸化物半導体膜と、前記第1の酸化物半導体膜上の、第2の酸化物半導体膜と、前記第2の酸化物半導体膜上の、第3の酸化物半導体膜と、を有することを特徴とする半導体装置。 - 請求項1乃至請求項5のいずれか一において、
前記酸化物半導体膜は、第1の酸化物半導体膜と、前記第1の酸化物半導体膜上の、第2の酸化物半導体膜と、前記第2の酸化物半導体膜上の、第3の酸化物半導体膜と、を有し、
前記第3の酸化物半導体膜は、前記第1の絶縁膜と前記第3の絶縁膜との間に設けられた領域を有し、かつ前記第2の絶縁膜と前記第3の絶縁膜との間に設けられた領域を有することを特徴とする半導体装置。
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