JP2014099595A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2014099595A JP2014099595A JP2013213451A JP2013213451A JP2014099595A JP 2014099595 A JP2014099595 A JP 2014099595A JP 2013213451 A JP2013213451 A JP 2013213451A JP 2013213451 A JP2013213451 A JP 2013213451A JP 2014099595 A JP2014099595 A JP 2014099595A
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- film
- oxide
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- oxide film
- conductive layer
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Abstract
【解決手段】ゲート電極と、ゲート電極に接して設けられたゲート絶縁膜と、ゲート絶縁膜を間に挟んでゲート電極と対向する酸化物積層膜と、を含むトランジスタを有し、酸化物積層膜は、少なくとも複数の酸化物膜の積層を有し、複数の酸化物膜の少なくとも一つはチャネル形成領域を有し、トランジスタのチャネル長は、5nm以上60nm未満であり、ゲート絶縁膜の厚さは、チャネル形成領域を有する酸化物膜の厚さよりも大きい半導体装置である。
【選択図】図1
Description
本実施の形態では、半導体装置の一形態を、図1を用いて説明する。本実施の形態では、半導体装置の一例として酸化物積層膜を有するトランジスタを示す。
本実施の形態では、先の実施の形態で述べた酸化物半導体膜、当該酸化物半導体膜で構成される酸化物積層膜、酸化物積層膜の形成方法、及び酸化物積層膜のバンド構造について、図2及び図3を参照して説明する。
本実施の形態では、実施の形態1に示すトランジスタ440の作製方法について、図4及び図5を参照して説明する。
本実施の形態では、先の実施形態で示したトランジスタを用いた半導体装置について説明する。なお、本発明の一態様に係る半導体装置は、マイクロプロセッサ、画像処理回路、表示モジュール用のコントローラ、DSP(Digital Signal Processor)、マイクロコントローラなどの、半導体素子を用いた各種半導体集積回路をその範疇に含む。また、本発明の一態様に係る半導体装置は、表示モジュールや、上記半導体集積回路を用いたRFタグなどの各種装置も、その範疇に含む。
本発明の一態様に係るトランジスタは、オフ電流を極めて小さくすることができる。すなわち、当該トランジスタを介した電荷のリークが起こりにくい電気特性を有する。以下では、このような電気特性を有するトランジスタを適用した、既知の記憶素子有するメモリと比べ、機能的に優れた記憶素子を有するメモリについて、図7乃至図9を参照して説明する。
先の実施形態に示した酸化物膜を用いたトランジスタ又は記憶素子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、マイクロコンピュータの一例として、センサにより検出した信号を演算し、演算結果を出力するマイクロコンピュータの構成及び動作について、図11乃至図14を用いて説明する。
本実施の形態では、先の実施形態で示した半導体装置を構成部品として適用した電気機器について説明する。
102 ゲート絶縁膜
103a 酸化物膜
103b 酸化物膜
103c 酸化物膜
104a ソース電極
104b ドレイン電極
105 チャネル形成領域
106 チャネル
110 トランジスタ
113 酸化物積層膜
401 基板
402 絶縁膜
403a 酸化物膜
403b 酸化物膜
403c 酸化物膜
404a 酸化物膜
404b 酸化物膜
404c 酸化物膜
405a 導電層
405b 導電層
406a 導電層
406b 導電層
407 ゲート絶縁膜
408 導電層
409 導電層
410 絶縁膜
411 絶縁膜
413 酸化物積層膜
414 酸化物積層膜
415a 低抵抗領域
415b 低抵抗領域
416a ソース電極
416b ドレイン電極
417a 突出部
417b 突出部
418 ゲート電極
421 電極
422 絶縁膜
423 電極
424 コンタクトプラグ
425 コンタクトプラグ
440 トランジスタ
450 トランジスタ
455 チャネル形成領域
456 チャネル
500 基板
501 チャネル形成領域
502 低濃度不純物領域
503 高濃度不純物領域
504a ゲート絶縁層
505a ゲート電極層
507 金属間化合物領域
508a 側壁絶縁層
509 素子分離絶縁膜
510 トランジスタ
521 絶縁層
522 絶縁層
524 絶縁層
525a 電極
525b 電極
526 絶縁層
527 絶縁層
528 絶縁層
530 コンタクトプラグ
550 メモリセル
551 トランジスタ
552 容量素子
553 ビット線
554 ワード線
555 容量線
556 センスアンプ
570 メモリセル
571 トランジスタ
572 容量素子
573 ノード
574 信号線
575 ソース線
576 ワード線
577 ビット線
578 容量線
580 周辺回路
581a メモリセルアレイ
581b メモリセルアレイ
701 下地膜
702 酸化物半導体膜
703a 第1の導電層
703b 第2の導電層
704a 第3の導電層
704b 第4の導電層
705 ゲート絶縁膜
706 第5の導電層
707 第6の導電層
708 第1の絶縁層
709 第2の絶縁層
710 第3の絶縁層
1141 スイッチング素子
1142 記憶素子
1143 記憶素子群
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
2000 マイクロコンピュータ
2001 パワーゲートコントローラ
2002 パワーゲート
2003 CPU
2004 検出部
2005 揮発性記憶部
2006 不揮発性記憶部
2007 インターフェース
2008 バスライン
2009 直流電源
2010 センサ
2011 アンプ
2012 ADコンバータ
3106 揮発性記憶部
3107 不揮発性記憶部
3140 トランジスタ
3141 容量素子
3142 トランジスタ
3143 トランジスタ
3144 トランジスタ
3145 セレクタ
3146 インバータ
3147 容量素子
3148 フリップフロップ
4287 ISO
9000 筐体
9001 ボタン
9002 マイクロフォン
9003 表示部
9004 スピーカ
9005 カメラ
9010 筐体
9011 表示部
9020 筐体
9021 ボタン
9022 マイクロフォン
9023 表示部
9030 筐体
9031a 表示部
9031b 表示部
9032 具
9033 操作スイッチ
9040 筐体
9041 表示部
9042 操作ボタン
9043 スピーカ
9044 マイクロフォン
9045 表示部
Claims (10)
- ゲート電極と、前記ゲート電極に接して設けられたゲート絶縁膜と、
前記ゲート絶縁膜を間に挟んで前記ゲート電極と対向する酸化物積層膜と、
を含むトランジスタを有し、
前記酸化物積層膜は、少なくとも複数の酸化物膜を有し、
前記複数の酸化物膜の少なくとも一つはチャネル形成領域を有し、
前記トランジスタのチャネル長は、5nm以上60nm未満であり、
前記ゲート絶縁膜の厚さは、前記チャネル形成領域を有する前記酸化物膜の厚さよりも大きいことを特徴とする半導体装置。 - ゲート電極と、前記ゲート電極に接して設けられたゲート絶縁膜と、
前記ゲート絶縁膜を間に挟んで前記ゲート電極と対向する酸化物積層膜と、
前記酸化物積層膜と接するソース電極及びドレイン電極と、を含むトランジスタを有し、
前記酸化物積層膜は、複数の酸化物膜を有し、
前記複数の酸化物膜の少なくとも一つはチャネル形成領域を有し、
前記トランジスタのチャネル長は、5nm以上60nm未満であり、
前記ゲート絶縁膜の厚さは、前記チャネル形成領域を有する前記酸化物膜の厚さよりも大きいことを特徴とする半導体装置。 - 請求項2において、
前記ソース電極又は前記ドレイン電極と、ゲート電極とが重なる領域のチャネル長方向における長さは、チャネル長の5%以上10%未満であることを特徴とする半導体装置。 - 請求項2又は3において、
前記ソース電極及び前記ドレイン電極は、
第1の導電層及び第2の導電層を有し、
前記第2の導電層は、前記第1の導電層の端面よりチャネル長方向に伸長した領域を有することを特徴とする半導体装置。 - 請求項4において、
前記第1の導電層は、前記第2の導電層と、同じ材料で形成されることを特徴とする半導体装置。 - 請求項4において、
前記第1の導電層は、前記第2の導電層と、異なる材料で形成されることを特徴とする半導体装置。 - 請求項1乃至6のいずれか一において、
前記トランジスタのチャネル長が10nm以上40nm以下であることを特徴とする半導体装置。 - 請求項1乃至7のいずれか一において、
前記ゲート絶縁膜は、酸化シリコン膜で換算した膜厚で、20nm以上30nm以下であることを特徴とする半導体装置。 - 請求項1乃至8のいずれか一において、
前記トランジスタのオフ時のリーク電流は、1zA/μm未満であることを特徴とする半導体装置。 - 請求項1乃至9のいずれか一において、
前記トランジスタのオフ時のリーク電流は、1yA/μm未満であることを特徴とする半導体装置。
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2015046499A (ja) * | 2013-08-28 | 2015-03-12 | 三菱電機株式会社 | 薄膜トランジスタおよびその製造方法ならびに液晶表示装置 |
JP2016042352A (ja) * | 2014-06-20 | 2016-03-31 | 株式会社半導体エネルギー研究所 | 半導体装置 |
JP2016154225A (ja) * | 2015-02-12 | 2016-08-25 | 株式会社半導体エネルギー研究所 | 半導体装置およびその作製方法 |
JP2016157937A (ja) * | 2015-02-24 | 2016-09-01 | 株式会社半導体エネルギー研究所 | 半導体装置およびその作製方法 |
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