JP2016149546A - 半導体装置およびその作製方法 - Google Patents
半導体装置およびその作製方法 Download PDFInfo
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- JP2016149546A JP2016149546A JP2016019795A JP2016019795A JP2016149546A JP 2016149546 A JP2016149546 A JP 2016149546A JP 2016019795 A JP2016019795 A JP 2016019795A JP 2016019795 A JP2016019795 A JP 2016019795A JP 2016149546 A JP2016149546 A JP 2016149546A
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- insulator
- conductor
- semiconductor
- transistor
- oxide semiconductor
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- 239000010453 quartz Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 1
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Abstract
【解決手段】第1の絶縁体、第1の酸化物半導体、第1の導電体を形成し、第1の導電体を加工して第2の導電体を形成し、第1の酸化物半導体を加工して第2の酸化物半導体を形成し、第2の導電体上に第2の絶縁体を形成し、第2の絶縁体上に第3の絶縁体を形成し、第3の絶縁体上に第4の絶縁体を形成し、第4の絶縁体を選択的に加工して、第3の絶縁体の一部を露出させ、露出した第3の絶縁体を選択的に加工して、第2の絶縁体の一部を露出させ、露出した第2の絶縁体を選択的に加工して、第2の導電体の一部を露出させ、露出した第2の導電体を選択的に加工して、第2の酸化物半導体の一部を露出させ、第2の酸化物半導体および第4の絶縁体上に第5の絶縁体を形成し、第5の絶縁体上に第3の導電体を形成した後、化学的機械研磨処理を行うことで、第4の絶縁体の上面を露出させる半導体装置である。
【選択図】図1
Description
本実施の形態では、本発明の一態様に係る半導体装置である、トランジスタおよびその作製方法の一例について説明する。
本実施の形態で示したように、半導体213bの上下に半導体213aおよび半導体213cを配置することで、トランジスタの電気特性を向上させることができる場合がある。
以下では、上記半導体に用いる、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。
本実施の形態では、実施の形態1で示したトランジスタの作製方法とは一部異なるトランジスタの作製方法について説明する。本実施の形態におけるトランジスタは、ソース電極およびドレイン電極として機能する導電体が、配線としても機能する点が、実施の形態1におけるトランジスタとは異なる。
本実施の形態では、実施の形態1および実施の形態2で示したトランジスタの作製方法とは一部異なるトランジスタの作製方法について説明する。
本実施の形態では、実施の形態1および実施の形態2で示したトランジスタの作製方法とは一部異なるトランジスタの作製方法について説明する。
<記憶装置1>
本発明の一態様に係るトランジスタを用いた、電力が供給されない状況でも記憶内容の保持が可能で、かつ、書き込み回数にも制限が無い半導体装置(記憶装置)の一例を図28に示す。
図29は、図28(A)に対応する半導体装置の断面図である。図29に示す半導体装置は、トランジスタ3200と、トランジスタ3300と、容量素子3400と、を有する。また、トランジスタ3300および容量素子3400は、トランジスタ3200の上方に配置する。なお、トランジスタ3300としては、図1に示したトランジスタを用いた例を示しているが、本発明の一態様に係る半導体装置は、これに限定されるものではない。よって適宜上述したトランジスタについての記載を参酌する。
図28(B)に示す半導体装置は、トランジスタ3200を有さない点で図28(A)に示した半導体装置と異なる。この場合も図28(A)に示した半導体装置と同様の動作により情報の書き込みおよび保持動作が可能である。
以下では、上述したトランジスタや上述した記憶装置などの半導体装置を含むCPUについて説明する。
以下では、本発明の一態様に係る表示装置の構成例について説明する。
図34(A)には、本発明の一態様に係る表示装置の上面図を示す。また、図34(B)には、本発明の一態様に係る表示装置の画素に液晶素子を用いた場合における画素回路を示す。また、図34(C)には、本発明の一態様に係る表示装置の画素に有機EL素子を用いた場合における画素回路を示す。
本発明の一態様に係る半導体装置は、表示機器、パーソナルコンピュータ、記録媒体を備えた画像再生装置(代表的にはDVD:Digital Versatile Disc等の記録媒体を再生し、その画像を表示しうるディスプレイを有する装置)に用いることができる。その他に、本発明の一態様に係る半導体装置を用いることができる電子機器として、携帯電話、携帯型を含むゲーム機、携帯データ端末、電子書籍端末、ビデオカメラ、デジタルスチルカメラ等のカメラ、ゴーグル型ディスプレイ(ヘッドマウントディスプレイ)、ナビゲーションシステム、音響再生装置(カーオーディオ、デジタルオーディオプレイヤー等)、複写機、ファクシミリ、プリンタ、プリンタ複合機、現金自動預け入れ払い機(ATM)、自動販売機などが挙げられる。これら電子機器の具体例を図35に示す。
201 基板
202 導電体
203 導電体
204 導電体
205 絶縁体
209 絶縁体
210 絶縁体
211 絶縁体
212 絶縁体
213 絶縁体
213a 半導体
213b 半導体
213c 半導体
213d 半導体
214 絶縁体
215a 導電体
215b 導電体
216 絶縁体
216a 導電体
216b 導電体
217a 導電体
217b 導電体
217c 導電体
219a 導電体
219b 導電体
223 絶縁体
225 導電体
226 導電体
234 絶縁体
235 導電体
240 犠牲層
401 絶縁体
402 絶縁体
406a 半導体
406b 半導体
406c 半導体
408 絶縁体
409 絶縁体
410 絶縁体
428 絶縁体
450 半導体基板
454 導電体
460 領域
462 絶縁体
464 絶縁体
465 絶縁体
466 絶縁体
467 絶縁体
468 絶縁体
469 絶縁体
470 絶縁体
472 絶縁体
474a 領域
474b 領域
475 絶縁体
476a 導電体
476b 導電体
476c 導電体
477a 導電体
477b 導電体
477c 導電体
478a 導電体
478b 導電体
478c 導電体
479a 導電体
479b 導電体
479c 導電体
480a 導電体
480b 導電体
480c 導電体
483a 導電体
483b 導電体
483c 導電体
483d 導電体
484a 導電体
484b 導電体
484c 導電体
484d 導電体
485a 導電体
485b 導電体
485c 導電体
485d 導電体
487a 導電体
487b 導電体
487c 導電体
488a 導電体
488b 導電体
488c 導電体
489a 導電体
489b 導電体
490a 導電体
490b 導電体
491a 導電体
491b 導電体
491c 導電体
492a 導電体
492b 導電体
492c 導電体
494 導電体
496 導電体
498 絶縁体
901 筐体
902 筐体
903 表示部
904 表示部
905 マイクロフォン
906 スピーカー
907 操作キー
908 スタイラス
911 筐体
912 筐体
913 表示部
914 表示部
915 接続部
916 操作キー
921 筐体
922 表示部
923 キーボード
924 ポインティングデバイス
931 筐体
932 冷蔵室用扉
933 冷凍室用扉
941 筐体
942 筐体
943 表示部
944 操作キー
945 レンズ
946 接続部
951 車体
952 車輪
953 ダッシュボード
954 ライト
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
1200 記憶素子
1201 回路
1202 回路
1203 スイッチ
1204 スイッチ
1206 論理素子
1207 容量素子
1208 容量素子
1209 トランジスタ
1210 トランジスタ
1213 トランジスタ
1214 トランジスタ
1220 回路
2100 トランジスタ
2200 トランジスタ
3001 配線
3002 配線
3003 配線
3004 配線
3005 配線
3200 トランジスタ
3300 トランジスタ
3400 容量素子
5000 基板
5001 画素部
5002 走査線駆動回路
5003 走査線駆動回路
5004 信号線駆動回路
5010 容量配線
5012 ゲート配線
5013 ゲート配線
5014 ドレイン電極
5016 トランジスタ
5017 トランジスタ
5018 液晶素子
5019 液晶素子
5020 画素
5021 スイッチング用トランジスタ
5022 駆動用トランジスタ
5023 容量素子
5024 発光素子
5025 信号線
5026 走査線
5027 電源線
5028 共通電極
5100 ペレット
5120 基板
5161 領域
Claims (11)
- 第1の絶縁体を形成し、
前記第1の絶縁体上に第1の酸化物半導体を形成し、
前記第1の酸化物半導体上に第1の導電体を形成し、
前記第1の導電体を加工して第2の導電体を形成し、
前記第1の酸化物半導体を加工して第2の酸化物半導体を形成し、
前記第2の導電体上に第2の絶縁体を形成し、
前記第2の絶縁体上に第3の絶縁体を形成し、
前記第3の絶縁体上に第4の絶縁体を形成し、
前記第4の絶縁体を選択的に加工して、前記第3の絶縁体の一部を露出させ、
前記露出した第3の絶縁体を選択的に加工して、前記第2の絶縁体の一部を露出させ、
前記露出した第2の絶縁体を選択的に加工して、前記第2の導電体の一部を露出させ、
前記露出した第2の導電体を選択的に加工して、前記第2の酸化物半導体の一部を露出させ、
前記第2の酸化物半導体および前記第4の絶縁体上に第5の絶縁体を形成し、
前記第5の絶縁体上に第3の導電体を形成した後、化学的機械研磨処理を行うことで、前記第4の絶縁体の上面を露出させることを特徴とする半導体装置の作製方法。 - 第1の絶縁体を形成し、
前記第1の絶縁体上に第1の酸化物半導体を形成し、
前記第1の酸化物半導体を加工して第2の酸化物半導体を形成し、
前記第2の酸化物半導体上に第1の導電体を形成し、
前記第1の導電体を加工して第2の導電体を形成し、
前記第2の導電体上に第2の絶縁体を形成し、
前記第2の絶縁体上に第3の絶縁体を形成し、
前記第3の絶縁体上に第4の絶縁体を形成し、
前記第4の絶縁体を選択的に加工して、前記第3の絶縁体の一部を露出させ、
前記露出した第3の絶縁体を選択的に加工して、前記第2の絶縁体の一部を露出させ、
前記露出した第2の絶縁体を選択的に加工して、前記第2の導電体の一部を露出させ、
前記露出した第2の導電体を選択的に加工して、前記第2の酸化物半導体の一部を露出させ、
前記第2の酸化物半導体および前記第4の絶縁体上に第5の絶縁体を形成し、
前記第5の絶縁体上に第3の導電体を形成した後、化学的機械研磨処理を行うことで、前記第4の絶縁体の上面を露出させることを特徴とする半導体装置の作製方法。 - 第1の絶縁体を形成し、
前記第1の絶縁体上に第1の酸化物半導体を形成し、
前記第1の酸化物半導体上に第1の導電体を形成し、
前記第1の導電体を加工して第2の導電体を形成し、
前記第1の酸化物半導体を加工して第2の酸化物半導体を形成し、
前記第2の導電体上に第2の絶縁体を形成し、
前記第2の絶縁体上に第3の絶縁体を形成し、
前記第3の絶縁体を選択的に加工して、前記第2の絶縁体の一部を露出させ、
前記露出した第2の絶縁体を選択的に加工して、前記第2の導電体の一部を露出させ、
前記露出した第2の導電体を選択的に加工して、前記第2の酸化物半導体の一部を露出させ、
前記露出した第2の酸化物半導体および前記第3の絶縁体上に犠牲層を形成した後、化学的機械研磨処理を行うことで、前記第3の絶縁体の上面を露出させ、
前記第3の絶縁体および前記犠牲層上に第4の絶縁体を形成し、
前記第4の絶縁体を選択的に加工して、前記犠牲層の上面を露出させ、
前記犠牲層を加工して、前記第2の酸化物半導体の一部を露出させ、
前記第2の酸化物半導体および前記第4の絶縁体上に第5の絶縁体を形成し、
前記第5の絶縁体上に第3の導電体を形成した後、化学的機械研磨処理を行うことで、前記第4の絶縁体の上面を露出させることを特徴とする半導体装置の作製方法。 - 請求項1乃至請求項3のいずれか一項において、
前記第5の絶縁体を形成後、前記第5の絶縁体上に第3の酸化物半導体を形成し、
前記第3の酸化物半導体上に、前記第3の導電体を形成することを特徴とする半導体装置の作製方法。 - 請求項1乃至請求項4のいずれか一項において、
前記第1の酸化物半導体は、2層以上の積層構造を有することを特徴とする半導体装置の作製方法。 - 請求項1乃至請求項5のいずれか一項において、
前記第2の絶縁体は、化学的機械研磨処理によって表面が平坦化された絶縁体であることを特徴とする半導体装置の作製方法。 - 請求項1乃至請求項6のいずれか一項において、
前記第3の導電体は、2層以上の積層構造を有することを特徴とする半導体装置の作製方法。 - 請求項1乃至請求項7いずれか一項において、
前記第3の導電体は、銅を有することを特徴とする半導体装置の作製方法。 - 基板上の第1の絶縁体と、
前記第1の絶縁体上の第1の半導体と、
前記第1の半導体上の第2の半導体と、
前記第2の半導体上の第1の導電体および第2の導電体と、
前記第1の絶縁体、前記第1の導電体および前記第2の導電体上の第2の絶縁体と、
前記第2の絶縁体上の第3の絶縁体と、
前記第3の絶縁体上の第4の絶縁体と、
前記第2の半導体上の第3の半導体と、
前記第3の半導体上の第5の絶縁体と、
前記第5の絶縁体上の第3の導電体と、を有し、
上面形状において、前記第3の導電体は、底面より上面の面積が大きく、
前記第3の絶縁体は、前記第2の絶縁体より比誘電率が大きいことを特徴とする半導体装置。 - 請求項9において、
前記第3の導電体は、2層以上の積層構造を有することを特徴とする半導体装置。 - 請求項9または請求項10において、
前記第3の導電体は、銅を有することを特徴とする半導体装置。
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