JP2015065426A - 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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- JP2015065426A JP2015065426A JP2014169001A JP2014169001A JP2015065426A JP 2015065426 A JP2015065426 A JP 2015065426A JP 2014169001 A JP2014169001 A JP 2014169001A JP 2014169001 A JP2014169001 A JP 2014169001A JP 2015065426 A JP2015065426 A JP 2015065426A
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- film
- semiconductor film
- transistor
- oxide semiconductor
- insulating film
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- 238000000034 method Methods 0.000 claims description 157
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- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 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
- 230000000717 retained effect Effects 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
- 239000005368 silicate glass Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
【解決手段】絶縁表面上に開口部を有する半導体膜を形成し、半導体膜上および開口部内に導電膜を形成した後、半導体膜上の導電膜を除去することで開口部内に導電ピラーを形成し、導電ピラー上および半導体膜上に島状のマスクを形成し、マスクを用いて、導電ピラーおよび半導体膜をエッチングして第1の電極および第1の半導体を形成し、第1の半導体の上面および側面にゲート絶縁膜を形成し、ゲート絶縁膜上で接し、第1の半導体の上面および側面に面するゲート電極を形成する。
【選択図】図1
Description
本実施の形態では、本発明の一態様のトランジスタ、半導体装置等について説明する。
以下では、本発明の一態様に係るトランジスタ構造の一例について説明する。
本発明の一態様に係るトランジスタ構造および作製方法の一例として、トランジスタ構造(1)において半導体膜に酸化物半導体膜を用いた場合について説明する。
次に、トランジスタ構造(2)の変形例(1)を図11に示す。図11に示すトランジスタの、図3(A)乃至(C)に示すトランジスタとの違いは、酸化物半導体膜が3層であることと、および酸化物半導体膜の形状が異なることである。図11では、酸化物半導体膜406cの一部がソース電極416aおよびドレイン電極416b上に接する。
次に、トランジスタ構造(2)の変形例(2)を図23に示す。図23に示すトランジスタの、図3に示すトランジスタとの違いは、酸化物半導体膜が3層であること、および酸化物半導体膜の形状が異なることである。図23では、酸化物半導体膜506cの一部がソース電極516aおよびドレイン電極516bの上に接する。
以下では、トランジスタ構造(1)に対して、ソース電極またはドレイン電極と半導体膜のチャネル形成領域との間に、ソース電極およびドレイン電極より抵抗が高い電界緩和領域を設ける例を示す。
以下では、酸化物半導体膜を用いたトランジスタと、シリコンを用いたトランジスタを組み合わせた半導体装置の一例について説明する。
以下では、上述した半導体装置を用いた応用製品について説明する。
以下では、発明の一態様に係る半導体装置が有する、メモリセルの回路構成およびその動作について、図28を参照して説明する。
以下では、メモリ1と異なる半導体装置の回路構成およびその動作について、図29を参照して説明する。
図30は、上述したトランジスタを少なくとも一部に用いたCPUの具体的な構成を示すブロック図である。
本実施の形態では、本発明の一態様の表示パネルの構成例について説明する。
図36(A)は、本発明の一態様の表示パネルの上面図であり、図36(B)は、本発明の一態様の表示パネルの画素に液晶素子を適用する場合に用いることができる画素回路を説明するための回路図である。また、図36(C)は、本発明の一態様の表示パネルの画素に有機EL素子を適用する場合に用いることができる画素回路を説明するための回路図である。
また、画素の回路構成の一例を図36(B)に示す。ここでは、VA型液晶表示パネルの画素に適用することができる画素回路を示す。
画素の回路構成の他の一例を図36(C)に示す。ここでは、有機EL素子を用いた表示パネルの画素構造を示す。
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、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37に示す。
本実施の形態では、本発明の一態様に係るRFIDの使用例について図38を用いながら説明する。RFIDの用途は広範にわたるが、例えば、紙幣、硬貨、有価証券類、無記名債券類、証書類(運転免許証や住民票等、図38(A)参照)、包装用容器類(包装紙やボトル等、図38(C)参照)、記録媒体(DVDソフトやビデオテープ等、図38(B)参照)、乗り物類(自転車等、図38(D)参照)、身の回り品(鞄や眼鏡等)、食品類、植物類、動物類、人体、衣類、生活用品類、薬品や薬剤を含む医療品、または電子機器(液晶表示装置、EL表示装置、テレビジョン装置、または携帯電話)等の物品、若しくは各物品に取り付ける荷札(図38(E)、図38(F)参照)等に設けて使用することができる。
52 絶縁膜
54 ゲート電極
56 半導体膜
62 ゲート絶縁膜
66a ソース電極
66b ドレイン電極
67a 配線
67b 配線
71 領域
68 保護絶縁膜
91 チャネル長
92 幅
100 基板
102 絶縁膜
104 ゲート電極
106 酸化物半導体膜
106a 酸化物半導体膜
106b 第1の酸化物半導体膜
106c 第2の酸化物半導体膜
112 ゲート絶縁膜
116a ソース電極
116b ドレイン電極
117a 配線
117b 配線
118 保護絶縁膜
121 ハードマスク
122 レジストマスク
123 レジストマスク
131 絶縁膜
136 酸化物半導体膜
137 導電膜
138 絶縁膜
139 導電膜
140 導電膜
152 素子分離領域
154 ゲート電極
162 ゲート絶縁膜
166a ソース領域
166b ドレイン領域
168 絶縁膜
172 導電膜
174 導電膜
176 導電膜
178 導電膜
181 導電膜
182 導電膜
186 絶縁膜
187 絶縁膜
191 トランジスタ
192 トランジスタ
200 メモリセル
211 トランジスタ
212 トランジスタ
213 トランジスタ
214 容量素子
300 記憶装置
302 記憶素子部
304 駆動回路
306 駆動回路
308 記憶素子
310 記憶回路
312 記憶回路
314 トランジスタ
316 トランジスタ
318 トランジスタ
320 トランジスタ
322 トランジスタ
324 トランジスタ
326 トランジスタ
328 トランジスタ
330 端子
332 端子
334 端子
336 端子
338 端子
340 データ保持部
342 データ保持部
344 データ保持部
346 データ保持部
348 容量素子
350 容量素子
400 基板
402 絶縁膜
404 ゲート電極
404a ゲート電極
404b ゲート電極
406a 酸化物半導体膜
406b 酸化物半導体膜
406c 酸化物半導体膜
412 ゲート絶縁膜
416a ソース電極
416b ドレイン電極
417a 配線
417b 配線
418 保護絶縁膜
421 ハードマスク
437 導電膜
500 基板
502 絶縁膜
504 ゲート電極
506a 酸化物半導体膜
506b 酸化物半導体膜
506c 酸化物半導体膜
512 ゲート絶縁膜
516a ソース電極
516b ドレイン電極
517a 配線
517b 配線
518 保護絶縁膜
521 ハードマスク
537 導電膜
700 基板
701 画素部
702 走査線駆動回路
703 走査線駆動回路
704 信号線駆動回路
710 容量配線
712 ゲート配線
713 ゲート配線
714 ドレイン電極層
716 トランジスタ
717 トランジスタ
718 液晶素子
719 液晶素子
720 画素
721 スイッチング用トランジスタ
722 駆動用トランジスタ
723 容量素子
724 発光素子
725 信号線
726 走査線
727 電源線
728 共通電極
800 半導体基板
802 絶縁膜
804 ゲート電極
806 酸化物半導体膜
812 ゲート絶縁膜
816a ソース電極
816b ドレイン電極
818 保護絶縁膜
821 ハードマスク
837 導電膜
901 半導体膜
902 電子捕獲層
902a 第1の絶縁膜
902b 第2の絶縁膜
902c 第3の絶縁膜
903 ゲート電極
904 電子捕獲準位
905 電子
906 曲線
907 曲線
908 トランジスタ
909 容量素子
1050 基板
1052 絶縁膜
1054 ゲート電極
1056 半導体膜
1062 ゲート絶縁膜
1066a ソース電極
1066b ドレイン電極
1067a 配線
1067b 配線
1071 領域
1072 領域
1068 保護絶縁膜
1141 スイッチング素子
1142 メモリセル
1143 メモリセル群
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
1400 基板
1402 絶縁膜
1404 ゲート電極
1406a 酸化物半導体膜
1406b 酸化物半導体膜
1406c 酸化物半導体膜
1412 ゲート絶縁膜
1416a ソース電極
1416b ドレイン電極
1417a 配線
1417b 配線
1418 保護絶縁膜
1441 領域
1442 領域
2901 筐体
2902 筐体
2903 表示部
2904 表示部
2905 マイクロフォン
2906 スピーカー
2907 操作キー
2908 スタイラス
2911 筐体
2912 筐体
2913 表示部
2914 表示部
2915 接続部
2916 操作キー
2921 筐体
2922 表示部
2923 キーボード
2924 ポインティングデバイス
2931 筐体
2932 冷蔵室用扉
2933 冷凍室用扉
2941 筐体
2942 筐体
2943 表示部
2944 操作キー
2945 レンズ
2946 接続部
2951 車体
2952 車輪
2953 ダッシュボード
2954 ライト
4000 RFID
Claims (11)
- 絶縁表面上に開口部を有する半導体膜を形成し、
前記半導体膜上および前記開口部内に導電膜を形成した後、前記半導体膜上の前記導電膜を除去することで前記開口部内に導電ピラーを形成し、
前記導電ピラー上および前記半導体膜上に島状のマスクを形成し、
前記マスクを用いて、前記導電ピラーおよび前記半導体膜をエッチングして第1の電極および第1の半導体を形成し、
前記第1の半導体の上面および側面にゲート絶縁膜を形成し、
前記ゲート絶縁膜上で接し、前記第1の半導体の上面および側面に面するゲート電極を形成することを特徴とする半導体装置の作製方法。 - 絶縁表面上に第1の開口部および第2の開口部を有する半導体膜を形成し、
前記半導体膜上、前記第1の開口部内および前記第2の開口部内に導電膜を形成した後、前記半導体膜上の前記導電膜を除去することで前記第1の開口部内および前記第2の開口部内に第1の導電ピラーおよび第2の導電ピラーを形成し、
前記第1の導電ピラー上、前記第2の導電ピラー上および前記半導体膜上に島状のマスクを形成し、
前記マスクを用いて、前記第1の導電ピラー、前記第2の導電ピラーおよび前記半導体膜をエッチングして第1の電極、第2の電極および第1の半導体を形成し、
前記第1の半導体は、前記第1の電極と前記第2の電極に挟まれるように形成され、
前記第1の半導体の上面および側面にゲート絶縁膜を形成し、
前記ゲート絶縁膜上で接し、前記第1の半導体の上面および側面に面するゲート電極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または請求項2において、前記半導体膜は酸化物半導体膜であることを特徴とする半導体装置の作製方法。
- 絶縁表面上の、第1の半導体膜、ソース電極およびドレイン電極と、
前記第1の半導体膜上のゲート絶縁膜と、
ゲート絶縁膜上のゲート電極と、を有し、
前記ソース電極と前記ドレイン電極は、前記第1の半導体膜の側面と接し、
前記第1の半導体膜は、前記ソース電極と前記ドレイン電極に挟まれており、
前記第1の半導体膜の少なくとも辺の一以上が前記ソース電極または前記ドレイン電極の辺の一以上と接することを特徴とする半導体装置。 - 請求項4において、
前記ゲート電極は、前記ドレイン電極または前記ソース電極の少なくとも一つ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4において、
前記半導体膜は、前記半導体膜のチャネル形成領域と前記ソース電極または前記ドレイン電極との間に電界緩和領域を有することを特徴とする半導体装置。 - 請求項4乃至請求項6のいずれかにおいて、
前記半導体膜の上面の高さが、前記ソース電極または前記ドレイン電極の上面の高さより大きいことを特徴とする半導体装置。 - 請求項4乃至請求項6のいずれかにおいて、
前記半導体膜の上面の高さが、前記ソース電極または前記ドレイン電極の上面の高さより小さいことを特徴とする半導体装置。 - 請求項4乃至請求項8のいずれかにおいて、
前記第1の半導体膜は酸化物半導体膜であることを特徴とする半導体装置。 - 請求項9において、
前記第1の半導体膜の下に第2の半導体膜を有し、
前記第2の半導体膜は酸化物半導体膜であり、
前記第2の半導体膜の厚さは、前記ゲート絶縁膜の厚さよりも厚いことを特徴とする半導体装置。 - シリコンを用いた第1のトランジスタと、
前記第1のトランジスタ上の第1の絶縁膜と、
前記第1の絶縁膜上の酸化物半導体膜、ソース電極およびドレイン電極と、
前記酸化物半導体膜上のゲート絶縁膜と、
ゲート絶縁膜上のゲート電極と、を有し、
前記ソース電極と前記ドレイン電極は、前記酸化物半導体膜の側面と接し、
前記酸化物半導体膜は、前記ソース電極と前記ドレイン電極に挟まれており、
前記酸化物半導体膜の少なくとも辺の一以上が前記ソース電極または前記ドレイン電極の辺の一以上と接することを特徴とする半導体装置。
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US20170162687A1 (en) | 2017-06-08 |
KR20150026875A (ko) | 2015-03-11 |
KR102702784B1 (ko) | 2024-09-04 |
JP2021061443A (ja) | 2021-04-15 |
US9590109B2 (en) | 2017-03-07 |
JP2019149567A (ja) | 2019-09-05 |
JP6522300B2 (ja) | 2019-05-29 |
KR20220016262A (ko) | 2022-02-08 |
JP7016972B2 (ja) | 2022-02-07 |
US9947794B2 (en) | 2018-04-17 |
KR102504546B1 (ko) | 2023-02-27 |
KR20230029747A (ko) | 2023-03-03 |
US20150060844A1 (en) | 2015-03-05 |
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