JP7352826B2 - 電気光学装置および電子機器 - Google Patents
電気光学装置および電子機器 Download PDFInfo
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- JP7352826B2 JP7352826B2 JP2019191773A JP2019191773A JP7352826B2 JP 7352826 B2 JP7352826 B2 JP 7352826B2 JP 2019191773 A JP2019191773 A JP 2019191773A JP 2019191773 A JP2019191773 A JP 2019191773A JP 7352826 B2 JP7352826 B2 JP 7352826B2
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- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
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Description
本実施形態では、電気光学装置として、画素ごとにトランジスターとしての薄膜トランジスター(Thin Film Transistor)を備えたアクティブ駆動型の液晶装置を例示する。なお、以降、薄膜トランジスターをTFTと略していう。この液晶装置は、例えば、後述する電子機器としての投射型表示装置において、光変調装置として好適に用いることが可能である。
本実施形態に係る電気光学装置としての液晶装置の構成について、図1から図3を参照して説明する。図1は、第1実施形態に係る電気光学装置としての液晶装置の構成を示す概略平面図である。図2は、液晶装置の構造を示す模式断面図である。図3は、液晶装置の電気的な構成を示す等価回路図である。ここで、図2は、図1の線分H-H’を含み、YZ平面に沿う断面を示している。
液晶装置100に備わる素子基板10の構造について、図5を参照して説明する。図5は、素子基板の構造を示す模式断面図である。なお、図5では、図4におけるA1-A2線、C1-C2線、およびB1-B2線の各々を含み、±Z方向に沿う3つの断面を並べて示している。また、図5では、配向膜18の図示を省略している。
本実施形態に係る液晶装置100の製造方法について、図6から図33を参照して説明する。図6は、液晶装置の製造方法のうち、素子基板の製造方法を示す工程フロー図である。図7、図9、図11、図13、図15A、図15B、図17、図19A、図19B、図21、図23、図25、図27、図29、および図31は、素子基板の製造方法を示す模式断面図である。図8、図10、図12、図14、図16、図18、図20、図22、図24、図26、図28、図30、図32、および図33は、素子基板の製造方法を示す概略平面図である。以下の説明においては図5も参照することとする。
本実施形態では、第1実施形態と同様に、電気光学装置として画素ごとにトランジスターとしてのTFTを備えたアクティブ駆動型の液晶装置を例示する。本実施形態に係る液晶装置は、第1実施形態の液晶装置100に対して、素子基板の構成を異ならせたものである。そのため、第1実施形態と同一の構成部位については、同一の符号を使用し、重複する説明は省略する。
本実施形態の液晶装置に備わる素子基板210の構造について、図34を参照して説明する。図34は、第2実施形態に係る液晶装置における素子基板の構造を示す模式断面図である。なお、第2実施形態に係る液晶装置は、第1実施形態の液晶装置100と同様な画素の配置を有している。そのため、図34では、液晶装置100の素子基板10における図5に相当する3つの断面を図示する。
次に、本実施形態の液晶装置の製造方法について説明する。本実施形態の液晶装置の製造方法は、素子基板210の製造方法を含み、素子基板210の製造方法に備わる工程以外では公知の技術が採用可能である。また、素子基板210の製造方法は、第1実施形態の素子基板10の製造方法を含む。そのため、以下の説明では、素子基板210の製造方法における特有の工程についてのみ述べることとする。なお、以下の製造方法においては、特に断りがない限り公知の技術が採用可能である。
3.1.電子機器
本実施形態の電子機器について、投射型表示装置を例に挙げ、図48を参照して説明する。図48は、第3実施形態に係る電子機器としての投射型表示装置の構成を示す概略図である。
Claims (10)
- 第1方向に延在する走査線と、
前記第1方向と交差する第2方向に延在するデータ線と、
前記走査線と重なる位置に、一方のソースドレイン領域およびチャネル領域が前記第1方向に沿って延在し、前記データ線と重なる位置に、他方のソースドレイン領域が前記第2方向に沿って延在する半導体層と、前記チャネル領域に対向して設けられたゲート電極と、を有するトランジスターと、
前記データ線と重なる位置において、前記他方のソースドレイン領域と重なるように設けられた容量電極を有する容量素子と、を備え、
前記トランジスターのゲート絶縁層は、酸化シリコン膜と窒化シリコン膜とから構成され、
前記容量素子の容量絶縁層は、窒化シリコン膜のみから構成されており、前記半導体層上において、前記半導体層の前記ゲート電極および前記容量電極と重ならない領域では、窒化シリコン膜が設けられていない、電気光学装置。 - 基板を備え、
前記基板は、前記データ線と重なる位置に凹部を有し、
前記凹部の側面および底面に沿って前記他方のソースドレイン領域が延在する、請求項1に記載の電気光学装置。 - 前記凹部内に絶縁層を備え、該絶縁層上に前記他方のソースドレイン領域が延在する、
請求項2に記載の電気光学装置。 - 前記トランジスターに対応して設けられた画素電極と、前記画素電極と第1コンタクトホールを介して電気的に接続された第1中継層と、を備え、
前記第1コンタクトホールは、前記トランジスターのゲート電極と前記走査線とを電気的に接続するための第2コンタクトホールと重なる、請求項1から請求項3のいずれか1項に記載の電気光学装置。 - 第1方向に延在する走査線と、
前記第1方向と交差する第2方向に延在するデータ線と、
前記走査線と重なる位置に、一方のソースドレイン領域およびチャネル領域が前記第1方向に沿って延在し、前記データ線と重なる位置に、他方のソースドレイン領域が前記第2方向に沿って延在する半導体層を有するトランジスターと、
前記データ線と重なる位置において、前記他方のソースドレイン領域と重なるように設けられた容量電極を有する容量素子と、
前記容量電極と電気的に接続される容量配線と、
前記トランジスターに対応して設けられた画素電極と、
前記画素電極と電気的に接続された第1中継層と、
前記第1中継層と電気的に接続された第2中継層と、を備え、
前記第1中継層および前記第2中継層は、それぞれ前記第1方向に延在し、前記半導体層と重なる本体部と、当該本体部から前記第2方向に突出する突出部と、を有し、
前記容量配線および前記容量電極は、それぞれ前記第2方向に延在し、前記データ線と重なる本体部と、当該本体部から前記第1方向に突出し、前記第1方向に延在する前記半導体層と重なる突出部と、を有する、
電気光学装置。 - 前記容量配線は、前記突出部と反対側に突出し、前記半導体層と隣り合う他の半導体層と重なる他の突出部を有する、請求項5に記載の電気光学装置。
- 前記第2方向に対向すると共に前記半導体層を挟んで設けられた一対の遮光壁を備え、
前記一対の遮光壁は、前記データ線と同一材料を含む、請求項1から請求項4のいずれか1項に記載の電気光学装置。 - 前記トランジスターの前記ゲート電極と前記走査線とは、前記遮光壁を介して電気的に接続される、請求項7に記載の電気光学装置。
- 前記第2方向に対向すると共に前記半導体層を挟んで設けられ、前記データ線と同一材料を含む一対の遮光壁を備え、
前記トランジスターのゲート電極と前記走査線とは、前記遮光壁を介して電気的に接続される、請求項5に記載の電気光学装置。 - 請求項1から請求項9のいずれか1項に記載の電気光学装置を備えた電子機器。
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