JP2017108131A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP2017108131A JP2017108131A JP2016231980A JP2016231980A JP2017108131A JP 2017108131 A JP2017108131 A JP 2017108131A JP 2016231980 A JP2016231980 A JP 2016231980A JP 2016231980 A JP2016231980 A JP 2016231980A JP 2017108131 A JP2017108131 A JP 2017108131A
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- Prior art keywords
- insulator
- oxide
- conductor
- transistor
- film
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- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 235000013842 nitrous oxide Nutrition 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
[構成例]
図1(A)に容量素子100の上面図の一例を示す。図1(B)は図1(A)に示す一点鎖線A1−A2に対応する断面図である。また、図1(C)は図1(B)に示す一点鎖線で囲まれた領域の拡大図である。
また、本実施の形態の変形例として、図2(A)、および図2(B)に示すように導電体104の角部が丸みを有していてもよい。丸みを有することで、導電体104上に形成される絶縁体112、および導電体116の被覆性がよくなるため、容量素子100の絶縁耐力を向上することができる。
また、本実施の形態の変形例として、導電体104の側面に凹部を設けることにより、側面積を増加することができる。例えば、図3(A)、および図3(B)に示すように、導電体104a上に、導電体104a、および導電体104cよりも内側に側面が形成されるように、導電体104bを設ける。当該構成により、導電体116は、絶縁体112を介して、導電体104aの上面の一部、および導電体104cの底面の一部を覆う構成となる。従って、容量素子の投影面積当たりの容量を増加させることができる。
また、本実施の形態の変形例として、導電体104の形状を加工することにより、導電体104の側面積を増加することができる。例えば、図4(A)、および図4(B)に示すように、導電体104に開口部を設けるとよい。開口部として失われる上面積以上に、開口部の内側に形成される側面積が大きい場合、容量素子の投影面積当たりの容量を増加させることができる。
本実施の形態では、半導体装置の一形態を、図6乃至図14を用いて説明する。
本発明の一態様である容量素子を使用した、半導体装置(記憶装置)の一例を図6に示す。なお、図6(B)は、図6(A)を回路図で表したものである。図6(C)は、図6(A)を構成の一部を拡大したものである。
以下では、上記構成例で示した半導体装置の作製方法の一例について、図8乃至図14を用いて説明する。
本実施の形態では、半導体装置の一形態を、図18乃至図21を用いて説明する。
以下では、本発明の一態様に係るトランジスタの一例について説明する。図18(A)、図18(B)、および図18(C)は、本発明の一態様に係るトランジスタの上面図および断面図である。図18(A)は上面図であり、図18(B)は、図18(A)に示す一点鎖線X1−X2に対応する断面図であり、図18(C)は、一点鎖線Y1−Y2に対応する断面図である。なお、図18(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。
図19には、トランジスタ200に適応できる構造の一例を示す。図19(A)はトランジスタ200の上面を示す。なお、図の明瞭化のため、図19(A)において一部の膜は省略されている。また、図19(B)は、図19(A)に示す一点鎖線X1−X2に対応する断面図であり、図19(C)はY1−Y2に対応する断面図である。
図20には、トランジスタ200に適応できる構造の一例を示す。図20(A)はトランジスタ200の上面を示す。なお、図の明瞭化のため、図20(A)において一部の膜は省略されている。また、図20(B)は、図20(A)に示す一点鎖線X1−X2に対応する断面図であり、図20(C)はY1−Y2に対応する断面図である。
図21には、トランジスタ200に適応できる構造の一例を示す。図21(A)はトランジスタ200の上面を示す。なお、図の明瞭化のため、図21(A)において一部の膜は省略されている。また、図21(B)は、図21(A)に示す一点鎖線X1−X2に対応する断面図であり、図21(C)はY1−Y2に対応する断面図である。
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酸化物半導体について、図22乃至図26を用いて以下説明を行う。
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。
本実施の形態においては、本発明の一態様に係るトランジスタなどを利用した半導体装置の回路の一例について説明する。
図27に示す半導体装置は、トランジスタ300を有さない点で図6に示した半導体装置と異なる。この場合も図6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。
本実施の形態においては、本発明の一態様に係る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の一例について説明する。
図28は、上述したトランジスタを一部に用いたCPUの一例の構成を示すブロック図である。
本実施の形態においては、本発明の一態様に係るトランジスタなどを利用した表示装置について、図30および図31を用いて説明する。
表示装置に用いられる表示素子としては液晶素子(液晶表示素子ともいう。)、発光素子(発光表示素子ともいう。)などを用いることができる。発光素子は、電流または電圧によって輝度が制御される素子をその範疇に含んでおり、具体的には無機EL(Electroluminescence)、有機ELなどを含む。以下では、表示装置の一例としてEL素子を用いた表示装置(EL表示装置)および液晶素子を用いた表示装置(液晶表示装置)について説明する。
本実施の形態においては、本発明の一態様に係るトランジスタなどを利用した電子機器について説明する。
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32に示す。
102 絶縁体
104 導電体
104a 導電体
104A 導電膜
104b 導電体
104c 導電体
112 絶縁体
112a 絶縁体
112b 絶縁体
116 導電体
116A 導電膜
120 絶縁体
122 絶縁体
124 導電体
124a 導電体
124b 導電体
124c 導電体
126 導電体
126a 導電体
126b 導電体
126c 導電体
126d 導電体
128 導電体
128a 導電体
128b 導電体
128c 導電体
128d 導電体
190 レジストマスク
200 トランジスタ
205 導電体
210 絶縁体
212 絶縁体
214 絶縁体
216 絶縁体
218 導電体
218a 導電体
218b 導電体
218c 導電体
220 絶縁体
222 絶縁体
224 絶縁体
230 酸化物
230a 酸化物
230b 酸化物
230c 酸化物
240a 導電体
240b 導電体
244 導電体
244a 導電体
244b 導電体
244c 導電体
245a 領域
245b 領域
246a 導電体
246b 導電体
250 絶縁体
260 導電体
270 絶縁体
280 絶縁体
282 絶縁体
284 絶縁体
300 トランジスタ
301 基板
302 半導体領域
304 絶縁体
306 導電体
308a 低抵抗領域
308b 低抵抗領域
320 絶縁体
322 絶縁体
324 絶縁体
326 絶縁体
328 導電体
328a 導電体
328b 導電体
328c 導電体
330 導電体
330a 導電体
330b 導電体
330c 導電体
350 絶縁体
352 絶縁体
354 絶縁体
356 導電体
358 導電体
358a 導電体
358b 導電体
358c 導電体
700 基板
701 絶縁体
702 絶縁体
702a 絶縁体
702b 絶縁体
702c 絶縁体
703 半導体
703a 半導体
703b 半導体
703c 半導体
704 導電体
705 導電体
706 絶縁体
707a 導電体
707b 導電体
710 絶縁体
714a 導電体
714b 絶縁体
714c 導電体
719 発光素子
720 絶縁体
731 端子
732 FPC
733a 配線
734 シール材
735 駆動回路
736 駆動回路
737 画素
741 トランジスタ
742 容量素子
743 スイッチ素子
744 信号線
750 基板
751 トランジスタ
752 容量素子
753 液晶素子
754 走査線
755 信号線
781 導電体
782 発光層
783 導電体
784 隔壁
791 導電体
792 絶縁体
793 液晶層
794 絶縁体
795 スペーサ
796 導電体
797 基板
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
3001 配線
3002 配線
3003 配線
3004 配線
3005 配線
Claims (7)
- 半導体基板上に第1のトランジスタを有し、
前記第1のトランジスタの上方に、酸化物半導体を有する第2のトランジスタを有し、
前記第2のトランジスタの上方に、容量素子を有し、
前記容量素子は、第1の導電体、第2の導電体、および絶縁体を有し、
前記第2の導電体は、前記絶縁体を介して、前記第1の導電体の側面を覆っていることを特徴とする半導体装置。 - 半導体基板上に第1のトランジスタを有し、
前記第1のトランジスタの上方に、酸化物半導体を有する第2のトランジスタを有し、
前記第2のトランジスタの上方に、層間膜を有し、
前記層間膜上に、容量素子を有し、
前記容量素子は、第1の導電体、第2の導電体、および絶縁体を有し、
前記層間膜と、前記絶縁体とが重畳する領域における前記第2の導電体の上面は、前記層間膜と、前記第1の導電体とが重畳する領域における前記第1の導電体の底面よりも、下方であ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、
前記絶縁体は、絶縁耐力が高い材料と、High−k材料とが積層されていることを特徴とする半導体装置。 - 請求項1乃至請求項3のいずれか一において、
前記第1のトランジスタと、前記第2のトランジスタとの間には、第1のバリア性を有する層間膜、およびバリア性を有する配線を有していることを特徴とする半導体装置。 - 請求項1乃至請求項4において、
前記容量素子と、前記第2のトランジスタとの間には、第2のバリア性を有する層間膜を有してい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、
前記第2のトランジスタ近傍の層間膜は、酸素を過剰に有していることを特徴とする半導体装置。 - 請求項1乃至請求項6のいずれか一に記載の半導体装置と、バッテリ、アンテナ、筐体、または、操作スイッチの少なくとも一つと、を有する電子機器。
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