JP2012256859A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP2012256859A JP2012256859A JP2012095644A JP2012095644A JP2012256859A JP 2012256859 A JP2012256859 A JP 2012256859A JP 2012095644 A JP2012095644 A JP 2012095644A JP 2012095644 A JP2012095644 A JP 2012095644A JP 2012256859 A JP2012256859 A JP 2012256859A
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- JP
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- Prior art keywords
- transistor
- oxide semiconductor
- wiring
- oxide
- insulating layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- 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
- H01L27/0203—Particular design considerations for integrated circuits
- H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
- H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
- H01L27/0266—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using field effect transistors as protective elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- 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
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Abstract
【解決手段】保護回路は、複数の非線形素子が重畳するように積層され、かつ該非線形素子が電気的に直列接続されている構成であり、該保護回路に含まれる少なくとも一つの非線形素子は、チャネル形成領域に酸化物半導体を用いたトランジスタをダイオード接続した素子であり、他の非線形素子は、チャネル形成領域にシリコンを用いたトランジスタをダイオード接続した素子、または、接合領域にシリコンを用いたダイオードとする。
【選択図】図1
Description
本実施の形態では、本発明の一態様における半導体装置に用いる保護回路の構成及び動作方法について説明する。
本実施の形態では、実施の形態1に示した保護回路の作製方法の一例について説明する。なお、本実施の形態では、酸化物半導体を用いるトランジスタをノンセルフアラインのトップゲート型で作製する方法を一例として説明するが、トランジスタの構造はこれに限るものではなく、セルフアラインのトップゲート型、またはボトムゲート型の構造であっても良い。
(a―A)2+(b―B)2+(c―C)2≦r2
を満たすことをいい、rは、例えば、0.05とすればよい。他の酸化物でも同様である。
本実施の形態では、実施の形態2の酸化物半導体のトランジスタの作製方法で説明したトランジスタの形態とは異なる構造のトランジスタであり、実施の形態1及び2に示す、第3の非線形素子203及び第4の非線形素子204に適用可能なトランジスタの構造について説明する。
本実施の形態では、実施の形態1で説明した保護回路を用いることができる半導体装置の一例として、記憶装置の回路構成及びその動作について説明を行う。なお、本実施の形態の記憶装置は、シリコンを用いる素子と酸化物半導体を用いる素子から形成されるため、該保護回路を形成するための特別な工程を必要とせず、他の素子と同一工程で該保護回路を形成することができる。
酸化物半導体に限らず、実際に測定される絶縁ゲート型トランジスタの電界効果移動度は、さまざまな理由によって本来の移動度よりも低くなる。移動度を低下させる要因としては半導体内部の欠陥や半導体と絶縁膜との界面の欠陥があるが、Levinsonモデルを用いると、半導体内部に欠陥がないと仮定した場合の電界効果移動度を理論的に導き出せる。
線形領域におけるドレイン電流Idは、以下の式となる。
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、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10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、テレビジョン装置などの電子機器に、本発明の一態様における半導体装置を適用する場合について説明する。
試料1および試料2のいずれも、BT試験前後におけるしきい値電圧の変動が小さく、信頼性が高いことがわかる。
102 第2の配線
103 第3の配線
111 第1の非線形素子
112 第2の非線形素子
113 第3の非線形素子
114 第4の非線形素子
121 第1の保護回路
122 第2の保護回路
131 半導体回路
201 第1の非線形素子
202 第2の非線形素子
203 第3の非線形素子
204 第4の非線形素子
301 第1の非線形素子
302 第2の非線形素子
401 第1の非線形素子
402 第2の非線形素子
500 単結晶シリコン基板
502 半導体層
504 電極
506 電極
508 ゲート電極
509 接続配線
518 第5の絶縁層
521 第4の絶縁層
522 半導体層
524 電極
526 電極
528 ゲート電極
529 接続配線
532a p+領域
536 第1の絶縁層
538 ゲート電極
538a 導電層
538b 導電層
539 第2の絶縁層
540 絶縁層
541a 接続配線
541b 接続配線
542 第6の絶縁層
544 第3の絶縁層
546 第7の絶縁層
558 ゲート電極
561a 接続配線
561b 接続配線
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
748 外部接続電極
749 太陽電池
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 リモートコントローラ
860 第1のトランジスタ
862 第2のトランジスタ
864 容量素子
901 トランジスタ
902 絶縁層
903 酸化物半導体層
904 ソース電極
905 ドレイン電極
906 ゲート絶縁層
907 ゲート電極
908 高濃度領域
909 チャネル形成領域
911 トランジスタ
912 絶縁層
913 酸化物半導体層
914 ソース電極
915 ドレイン電極
916 ゲート絶縁層
917 ゲート電極
918 高濃度領域
919 チャネル形成領域
921 トランジスタ
922 絶縁層
923 酸化物半導体層
924 ソース電極
925 ドレイン電極
926 ゲート絶縁層
927 ゲート電極
928 高濃度領域
929 低濃度領域
930 サイドウォール
931 チャネル形成領域
941 トランジスタ
942 絶縁層
943 酸化物半導体層
944 ソース電極
945 ドレイン電極
946 ゲート絶縁層
947 ゲート電極
948 高濃度領域
949 低濃度領域
950 サイドウォール
951 チャネル形成領域
2101 下地絶縁層
2102 埋め込み絶縁物
2103a 半導体領域
2103b 半導体領域
2103c 半導体領域
2104 ゲート絶縁層
2105 ゲート
2106a 側壁絶縁物
2106b 側壁絶縁物
2107 絶縁物
2108a ソース
2108b ドレイン
3100 基板
3102 下地絶縁層
3104 保護絶縁膜
3106 酸化物半導体層
3106a 高抵抗領域
3106b 低抵抗領域
3108 ゲート絶縁層
3110 ゲート電極
3112 側壁絶縁膜
3114 電極
3116 層間絶縁膜
3118 配線
3600 基板
3602 下地絶縁層
3606 酸化物半導体層
3608 ゲート絶縁層
3610 ゲート電極
3614 電極
3616 層間絶縁膜
3618 配線
3620 保護膜
Claims (7)
- 基板上に、
第1の配線と、
第2の配線と、
第3の配線と、
第1の非線形素子及び第3の非線形素子を含む第1の保護回路と、
第2の非線形素子及び第4の非線形素子を含む第2の保護回路と、を有し、
前記第1の保護回路は、前記基板側から順に前記第1の非線形素子及び前記第3の非線形素子が重畳するように積層され、かつ該非線形素子が電気的に直列接続されている構成であり、
前記第2の保護回路は、前記基板側から順に前記第2の非線形素子及び前記第4の非線形素子が重畳するように積層され、かつ該非線形素子が電気的に直列接続されている構成であり、
前記第1の保護回路は、該保護回路を構成する前記第1の非線形素子及び前記第3の非線形素子が、前記第1の配線の電位が前記第2の配線の電位よりも高いときに順方向バイアスとなるように、前記第1の配線と前記第2の配線との間に電気的に接続され、
前記第2の保護回路は、該保護回路を構成する前記第2の非線形素子及び前記第4の非線形素子が、前記第1の配線の電位が前記第3の配線の電位よりも低いときに順方向バイアスとなるように、前記第1の配線と前記第3の配線との間に電気的に接続されていることを特徴とする半導体装置。 - 請求項1において、前記第1の配線は半導体回路に信号を入力するための信号線であり、前記第2の配線は高電位電源線であり、前記第3の配線は低電位電源線または接地電位線であることを特徴とする半導体装置。
- 請求項1または2において、前記第1の非線形素子及び前記第2の非線形素子は、チャネル形成領域をシリコンで形成したトランジスタであることを特徴とする半導体装置。
- 請求項3において、前記トランジスタは、pチャネル型のトランジスタであることを特徴とする半導体装置。
- 請求項1または2において、前記第1の非線形素子及び前記第2の非線形素子は、接合領域をシリコンで形成したダイオードであることを特徴とする半導体装置。
- 請求項1乃至5のいずれか一項において、前記第3の非線形素子及び前記第4の非線形素子は、チャネル形成領域を化合物半導体で形成したトランジスタであることを特徴とする半導体装置。
- 請求項6において、前記化合物半導体は酸化物半導体であることを特徴とする半導体装置。
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Also Published As
Publication number | Publication date |
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TWI548057B (zh) | 2016-09-01 |
US20120268849A1 (en) | 2012-10-25 |
JP5977570B2 (ja) | 2016-08-24 |
US8941958B2 (en) | 2015-01-27 |
KR20120120047A (ko) | 2012-11-01 |
KR101971121B1 (ko) | 2019-04-22 |
TW201246508A (en) | 2012-11-16 |
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