JP2015170859A - 放射を検知するためのフォトセンサアレイおよびそれを準備するための方法 - Google Patents
放射を検知するためのフォトセンサアレイおよびそれを準備するための方法 Download PDFInfo
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- JP2015170859A JP2015170859A JP2015047553A JP2015047553A JP2015170859A JP 2015170859 A JP2015170859 A JP 2015170859A JP 2015047553 A JP2015047553 A JP 2015047553A JP 2015047553 A JP2015047553 A JP 2015047553A JP 2015170859 A JP2015170859 A JP 2015170859A
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- layer
- film transistor
- thin film
- photosensitive element
- amorphous silicon
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- H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
- H01L31/0256—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by the material
- H01L31/0264—Inorganic materials
- H01L31/028—Inorganic materials including, apart from doping material or other impurities, only elements of Group IV of the Periodic System
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/20—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof such devices or parts thereof comprising amorphous semiconductor materials
- H01L31/202—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof such devices or parts thereof comprising amorphous semiconductor materials including only elements of Group IV of the Periodic System
Abstract
【解決手段】フォトセンサで使用される多層構造1であり、該多層構造1は、基板25と、金属酸化物半導体チャネルを含む薄膜トランジスタ11と、アモルファスシリコンを含む感光素子31と、を備える。薄膜トランジスタ11は、感光素子31に電気的に接続され、薄膜トランジスタ11と感光素子31は、基板25上に配置され水素バリア構造32、37によって分離される。
【選択図】図5
Description
以下の定義および方法は、本発明をよりよく定義し、本発明の実施にあたって当業者をガイドするために設けられている。特に断りのない限り、用語は、本願の関連分野における当業者による従来の使用に従って解釈される。
一般的に、本開示は、X線検知器などのフォトセンサ装置に組み込むことができる多層構造を対象としている。多層構造は、薄膜トランジスタと、薄膜トランジスタに電気的に接続された感光素子と、水素バリアと、を備え、これらは全て基板によって支持されている。薄膜トランジスタは、金属酸化物チャネルを備える。感光素子は、アモルファスシリコン層を備える。水素バリアは、薄膜トランジスタと感光素子を互いに分離する。機能的には、バリア構造は、多層デバイスの任意の熱処理中における薄膜トランジスタの水素被毒を緩和する。さらに、金属酸化物薄膜アレイは、大気雰囲気への長期曝露によってその性能が悪化し得る。本開示が取り組む戦略は、大気中の汚染物質が入らないようにするためのバリアに関するだけでなく、オペレーション中の電気的負荷においても安定した薄膜トランジスタを実現するために外方拡散を閉じ込めるバリアにも関する。例えば、一実施形態においては、バリア構造は、金属酸化物のTFT誘電体上に金属の「キャップ」を設けて、金属酸化物チャネル内への水分の拡散を最小限に抑える。
Claims (15)
- フォトセンサピクセルセルであって、
基板と、基板上にそれぞれ配置されるフォトセンサピクセル、ゲートラインおよびデータラインと、を備え、
フォトセンサピクセルは、ゲートラインおよびデータラインに接続された金属酸化物薄膜トランジスタを備え、
水素化アモルファスシリコンを含む感光素子と、金属酸化物薄膜トランジスタと感光素子を互いに分離する水素バリア構造と、をさらに備え、
水素バリア構造の水素拡散率は、350°Cにおいて5×10−15cm2/sec未満である、フォトセンサピクセルセル。 - フォトセンサピクセルを製造する方法であって、
基板上に水素化アモルファスを含む感光素子を形成するステップと、
基板上に金属酸化物薄膜トランジスタを形成するステップと、
金属酸化物薄膜トランジスタと感光素子を互いに分離する水素バリア構造を形成するステップと、を含み、
水素バリア構造の水素拡散率は、350°Cにおいて5×10−15cm2/sec未満である、方法。 - 固体画像センサであって、
基板と、複数の行および複数の列にて配置されたフォトセンサピクセルの集合体を含むピクセルアレイと、ゲートラインと、データラインと、を備え、
ピクセルアレイ、ゲートラインおよびデータラインは、基板上に配置され、フォトセンサピクセルの集合体におけるそれぞれの要素は、ゲートラインおよびデータラインに接続された金属酸化物薄膜トランジスタを備え、
水素化アモルファスシリコンを含む感光素子と、金属酸化物薄膜トランジスタと感光素子を互いに分離する水素バリア構造と、をさらに備え、
水素バリア構造の水素拡散率は、350°Cにおいて5×10−15cm2/sec未満である、固体画像センサ。 - 基板と、基板上にそれぞれ配置されるピクセルの集合体、ゲートラインおよびデータラインと、を備える固体フォトセンサを製造する方法であって、
基板上にゲートラインおよびデータラインを形成するステップと、
基板上にアモルファスシリコン層を含むフォトダイオードを形成するステップと、
基板上に金属酸化物薄膜トランジスタを形成するステップと、
金属酸化物薄膜トランジスタをゲートラインおよびデータラインに接続するステップと、
金属酸化物薄膜トランジスタと感光素子を互いに分離する水素バリア構造を形成するステップと、を含み、
水素バリア構造の水素拡散率は、350°Cにおいて5×10−15cm2/sec未満である、方法。 - 金属酸化物薄膜トランジスタは、ソース電極と、ドレイン電極と、ゲート誘電体と、チャネルと、を備え、
チャネルは、元素周期表の第12族および第13族の金属の中の1つ又は複数の酸化物を含む、請求項1から4のいずれか1つに記載のフォトセンサピクセルセル、固体画像センサ、又は方法。 - チャネルは、亜鉛-スズ酸化物、インジウム-亜鉛酸化物、亜鉛-ガリウム酸化物、カドミウム-ガリウム酸化物、カドミウム-インジウム酸化物からなるグループから選択される混合金属酸化物を含む、請求項5に記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- チャネルは、AXBXCXOX(Aは、ZnおよびCdのグループから選択され、Bは、GaおよびInのグループから選択され、Cは、Al、Zn、Cd、GaおよびInのグループから選択され、Oは、酸素であり、xのそれぞれは、0ではない独立した整数であり、A、BおよびCのそれぞれは異なっている。)の式により表される混合金属酸化物を含む、請求項5に記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- 感光素子は、ドープアモルファスシリコン層が上方に形成された感光性真性シリコン層と、感光性真性シリコン層の下方に配置されたドープアモルファスシリコン層とを含む多層アモルファスシリコン構造を備える、請求項1から7のいずれか1つに記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- 感光素子は、水素化アモルファスシリコンを含むp型/真性シリコン/n型(PIN)フォトダイオード、アモルファスシリコンを含むn型/真性シリコン/p型(NIP)フォトダイオード、あるいは水素化アモルファスシリコン金属-絶縁体半導体(MIS)センサである、請求項8に記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- 感光素子における第1の側は、放射に曝される側であって、酸化スズ、酸化亜鉛、酸化インジウムスズ(ITO)、酸化インジウム亜鉛(IZO)、酸化アンチモンスズ(AZO)、フッ素ドープ酸化スズ(FTO)、アルミニウムドープ酸化亜鉛(AZO)、又はその他の実質的に透明な導電性材料による層を含む、請求項1から9のいずれか1つに記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- 感光素子は、抵抗接点のためのn+水素化アモルファスシリコン層と、真性アモルファスシリコンによる厚い層と、p型アモルファスシリコンによる層と、を含むPINダイオードである、請求項1から10のいずれか1つに記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- n+水素化アモルファスシリコン層、真性アモルファスシリコン層、p型アモルファスシリコン層の順に配置されるとともに、これらの層は、n+層が約3nm―約50nmの厚みを有し、真性層が約500nm―約2000nmの厚みを有し、p層が約3nm―約50nmの厚みを有するアイランドとなるように、パターン化される、請求項11に記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- 感光素子は、感光素子の真性シリコンまで光が通過するように、アモルファスシリコン積層体の上に透明な導電性材料で形成されるトップダイオードコンタクトを備える、請求項11に記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- 水素バリア構造は、Cr、Ti、W、Mo、Al、NdドープAl、Ta、TiNおよびそれらの組み合わせからなるグループから選択される金属による金属層を含み、当該金属層は、約20nm―約300nmの範囲の厚みを有する、請求項1から13のいずれか1つに記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
- 水素バリア構造は、窒化ケイ素、酸化ケイ素、酸窒化ケイ素、酸化アルミニウム、窒化アルミニウム、酸窒化アルミニウム、酸化チタン、酸化タンタル、窒化タンタル、およびそれらの組み合わせからなるグループから選択される誘電体による層を含む、請求項1から14のいずれか1つに記載のフォトセンサピクセルセル、固体画像センサ、又は方法。
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- 2015-03-10 JP JP2015047553A patent/JP2015170859A/ja active Pending
- 2015-03-10 EP EP15158510.6A patent/EP2919269B1/en active Active
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JP2017105841A (ja) * | 2014-10-17 | 2017-06-15 | 株式会社アスター美容 | 非結晶性の組成物およびそれを含む外用剤 |
CN107134467A (zh) * | 2016-02-26 | 2017-09-05 | Nlt科技股份有限公司 | 图像传感器及其制造方法 |
US10615201B2 (en) | 2016-02-26 | 2020-04-07 | Tianma Microelectronics Co., Ltd. | Image sensor and method of manufacturing the same |
US10741606B2 (en) | 2017-04-28 | 2020-08-11 | Tianma Microelectronics Co., Ltd. | Image sensor and sensor device |
KR20230159351A (ko) * | 2017-12-14 | 2023-11-21 | 엘지디스플레이 주식회사 | 디지털 엑스레이 검출기용 기판, 이를 포함하는 디지털 엑스레이 검출기 및 제조 방법 |
KR102642536B1 (ko) * | 2017-12-14 | 2024-02-28 | 엘지디스플레이 주식회사 | 디지털 엑스레이 검출기용 기판, 이를 포함하는 디지털 엑스레이 검출기 및 제조 방법 |
CN111430386A (zh) * | 2020-04-01 | 2020-07-17 | 京东方科技集团股份有限公司 | 光电探测器、显示基板及光电探测器的制作方法 |
CN111430386B (zh) * | 2020-04-01 | 2023-11-10 | 京东方科技集团股份有限公司 | 光电探测器、显示基板及光电探测器的制作方法 |
US11894398B2 (en) | 2020-04-01 | 2024-02-06 | Boe Technology Group Co., Ltd. | Photodetector, display substrate, and method of manufacturing photodetector |
Also Published As
Publication number | Publication date |
---|---|
EP2919269A3 (en) | 2015-10-21 |
EP2919269B1 (en) | 2017-07-19 |
US20160013243A1 (en) | 2016-01-14 |
EP2919269A2 (en) | 2015-09-16 |
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