JPWO2015019857A1 - 半導体装置、表示装置および半導体装置の製造方法 - Google Patents
半導体装置、表示装置および半導体装置の製造方法Info
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 171
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- 239000002184 metal Substances 0.000 claims abstract description 115
- 239000011229 interlayer Substances 0.000 claims abstract description 101
- 239000000758 substrate Substances 0.000 claims description 224
- 239000010408 film Substances 0.000 claims description 203
- 238000000034 method Methods 0.000 claims description 51
- 239000004973 liquid crystal related substance Substances 0.000 claims description 35
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- 239000011241 protective layer Substances 0.000 description 1
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Abstract
Description
10 TFT
11 基板
12 第1メタル層
12g ゲート電極
14 ゲート絶縁層
16 酸化物半導体層
18 第2メタル層
18s ソース電極
18d ドレイン電極
18u 上部配線層
22 層間絶縁層
22a、22c コンタクトホール
22f 絶縁膜
TE 透明電極層
24、38、44 下部透明電極層
Tc 透明導電層
24h 接続部
24k、38k、48k 透明電極
24c、38c、44c 下部透明接続層
26、36、46 誘電体層
26a、26c、36c、46c 開口部
28、34、48 上部透明電極層
28p、34p、48p 画素電極
28c、34c、48c 上部透明接続層
72Tb、72Tc、72Td 端子部
900 対向基板
930 液晶層
1000 液晶表示装置
Claims (20)
- 基板と、前記基板に支持された薄膜トランジスタとを備える半導体装置であって、
前記薄膜トランジスタのゲート電極を有する第1メタル層と、
前記第1メタル層上に形成されたゲート絶縁層と、
前記ゲート絶縁層上に形成された、前記薄膜トランジスタの活性層を含む酸化物半導体層であって、前記ゲート電極と重なるように形成された第1部分および前記第1部分から前記ゲート電極の一端側のエッジを横切って延長された第2部分を有する酸化物半導体層と、
前記酸化物半導体層上に形成された、前記薄膜トランジスタのソース電極およびドレイン電極を有する第2メタル層であって、前記ドレイン電極は、前記ソース電極よりも前記第2部分の近くに配置されている、第2メタル層と、
前記第2メタル層上に形成された、第1コンタクトホールを有する層間絶縁層と、
前記層間絶縁層上および前記第1コンタクトホール内に形成された第1透明電極層と
を備え、
前記層間絶縁層は、有機絶縁層を含んでおらず、
前記第1コンタクトホールは、前記基板の法線方向から見たときに、前記酸化物半導体層の前記第2部分と、前記ドレイン電極の、前記第2部分に近い側の端部とに重なるように形成されており、
前記第1透明電極層は、前記第1コンタクトホール内で前記ドレイン電極の前記端部および前記酸化物半導体層の前記第2部分に接する透明導電層を有する、半導体装置。 - 前記第1透明電極層上に形成された誘電体層であって、前記第1コンタクトホールと対応した位置に第1開口部を有する誘電体層と、
前記誘電体層上および前記第1開口部内に形成された第2透明電極層と
をさらに備え、
前記第1透明電極層は、前記透明導電層と電気的に接続されていない第1電極を有し、
前記第2透明電極層は、前記第1開口部内で前記透明導電層に接する第2電極を有する、請求項1に記載の半導体装置。 - 前記第1電極は、前記誘電体層を介して前記第2電極と対向している、請求項2に記載の半導体装置。
- 複数の画素を有し、
前記複数の画素のそれぞれは、前記薄膜トランジスタ、前記第1電極および前記第2電極を含み、
前記第1電極は、共通電極として機能し、
前記第2電極は、画素電極として機能する、請求項2または3に記載の半導体装置。 - 前記第2メタル層は、上部配線層を有し、
前記第1透明電極層は、前記第1電極と電気的に接続された第1透明接続層を有し、
前記第2透明電極層は、第2透明接続層を有し、
前記層間絶縁層は、第2コンタクトホールを有し、
前記第2コンタクトホールは、前記基板の法線方向から見たときに、前記上部配線層と重なるように形成されており、
前記誘電体層は、前記第2コンタクトホールと対応した位置に形成された第2開口部を有し、
前記第2透明接続層は、前記第2コンタクトホール内で前記上部配線層に接するとともに、前記第2開口部の内側において前記第1透明接続層と接する、請求項2から4のいずれかに記載の半導体装置。 - 前記第2メタル層は、上部配線層を有し、
前記第1透明電極層は、前記第1電極と電気的に接続された第1透明接続層を有し、
前記層間絶縁層は、第2コンタクトホールを有し、
前記第2コンタクトホールは、前記基板の法線方向から見たときに、前記上部配線層と重なるように形成されており、
前記第1透明接続層は、前記第2コンタクトホール内で前記上部配線層に接する、請求項2から4のいずれかに記載の半導体装置。 - 複数の画素を有し、
前記複数の画素のそれぞれは、前記薄膜トランジスタおよび前記透明導電層を含み、
前記透明導電層は、画素電極として機能する、請求項1に記載の半導体装置。 - 前記層間絶縁層と前記第1透明電極層との間に配置された誘電体層と、
前記層間絶縁層と前記誘電体層との間に配置された第2透明電極層と
をさらに備え、
前記第2透明電極層は、前記透明導電層と電気的に接続されていない透明電極を含む、請求項7に記載の半導体装置。 - 前記透明電極は共通電極として機能する、請求項8に記載の半導体装置。
- 前記第2メタル層は、上部配線層を有し、
前記第1透明電極層は、第1透明接続層を有し、
前記第2透明電極層は、前記透明電極と電気的に接続された第2透明接続層を有し、
前記層間絶縁層は、第2コンタクトホールを有し、
前記第2コンタクトホールは、前記基板の法線方向から見たときに、前記上部配線層と重なるように形成されており、
前記誘電体層には、前記第2コンタクトホールと対応した位置に開口部が形成されており、
前記第1透明接続層は、前記第2コンタクトホール内で前記上部配線層に接するとともに、前記開口部の内側において前記第2透明接続層と接する、請求項8または9に記載の半導体装置。 - 前記第1透明電極層を覆う誘電体層と、
前記誘電体層上に形成された第2透明電極層と
をさらに備え、
前記第2透明電極層は、前記透明導電層と電気的に接続されていない透明電極を含み、前記透明電極は共通電極として機能する、請求項7に記載の半導体装置。 - 前記第2メタル層は、上部配線層を有し、
前記層間絶縁層は、第2コンタクトホールを有し、
前記第2コンタクトホールは、前記基板の法線方向から見たときに、前記上部配線層と重なるように形成されており、
前記誘電体層には、前記第2コンタクトホールと対応した位置に開口部が形成されており、
前記第2透明電極層は、前記透明電極と電気的に接続された透明接続層を有し、
前記透明接続層は、前記開口部の内側において、前記第2コンタクトホール内で前記上部配線層に接する、請求項11に記載の半導体装置。 - 前記第2メタル層は、上部配線層を有し、
前記層間絶縁層は、第2コンタクトホールを有し、
前記第2コンタクトホールは、前記基板の法線方向から見たときに、前記上部配線層と重なるように形成されており、
前記誘電体層には、前記第2コンタクトホールと対応した位置に開口部が形成されており、
前記第1透明電極層は、前記透明導電層とは電気的に接続されていない第1透明接続層を有し、
前記第2透明電極層は、前記透明電極と電気的に接続された第2透明接続層を有し、
前記第1透明接続層は、前記第2コンタクトホール内で前記上部配線層に接し、
前記第2透明接続層は、前記開口部の内側において前記第1透明接続層と接する、請求項11に記載の半導体装置。 - 前記酸化物半導体層は、In−Ga−Zn−O系の半導体を含む、請求項1から13のいずれかに記載の半導体装置。
- 前記In−Ga−Zn−O系の半導体は、結晶質部分を含む、請求項14に記載の半導体装置。
- 請求項1から15のいずれかに記載の半導体装置と、
前記半導体装置と対向するように配置された対向基板と、
前記対向基板と前記半導体装置との間に配置された液晶層と
を備える表示装置。 - ゲート電極を有する第1メタル層を基板上に形成する工程(a)と、
前記第1メタル層を覆うゲート絶縁層を形成する工程(b)と、
前記ゲート電極と重なるように形成された第1部分および前記第1部分から前記ゲート電極の一端側のエッジを横切って延長された第2部分を有する酸化物半導体層を前記ゲート絶縁層上に形成する工程(c)と、
ソース電極、および前記ソース電極よりも前記第2部分の近くに配置されたドレイン電極を有する、第2メタル層を前記酸化物半導体層上に形成する工程(d)と、
層間絶縁膜を前記第2メタル層上に形成する工程であって、前記層間絶縁膜は有機絶縁膜を含まない工程(e)と、
前記層間絶縁膜をエッチングすることにより、前記酸化物半導体層の前記第2部分の表面、および前記ドレイン電極の、前記第2部分に近い側の端部を露出するコンタクトホールを形成する工程(f)と、
前記コンタクトホール内で前記ドレイン電極の前記端部および前記酸化物半導体層の前記第2部分の表面に接する、透明導電層を形成する工程(g)と
を含む、半導体装置の製造方法。 - 前記工程(f)において、前記層間絶縁膜のエッチングは、前記酸化物半導体層をエッチストップとして行う、請求項17に記載の半導体装置の製造方法。
- 前記酸化物半導体層は、In−Ga−Zn−O系の半導体を含む、請求項17または18に記載の半導体装置の製造方法。
- 前記In−Ga−Zn−O系の半導体は、結晶質部分を含む、請求項19に記載の半導体装置の製造方法。
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