JP6444066B2 - 光電変換装置および撮像システム - Google Patents
光電変換装置および撮像システム Download PDFInfo
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- H—ELECTRICITY
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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
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- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/14609—Pixel-elements with integrated switching, control, storage or amplification elements
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- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
- H01L27/14603—Special geometry or disposition of pixel-elements, address-lines or gate-electrodes
- H01L27/14607—Geometry of the photosensitive area
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components 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
- H01L27/144—Devices controlled by radiation
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- H01L27/144—Devices controlled by radiation
- H01L27/146—Imager structures
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- H01L27/14625—Optical elements or arrangements associated with the device
- H01L27/14629—Reflectors
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- Condensed Matter Physics & Semiconductors (AREA)
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Description
10 光電変換装置
101、102 光電変換部
109 分離部
110 絶縁膜
111 導光部
121 低屈折率部
122 高屈折率部
Claims (18)
- 複数の受光素子を有する光電変換装置であって、
前記複数の受光素子のうちの少なくとも1つの受光素子は、前記1つの受光素子の受光面に沿って並ぶ複数の光電変換部と、前記複数の光電変換部の間に位置する分離部と、前記受光面に平行な或る平面内において少なくとも1つの絶縁層を含む絶縁膜で囲まれ、前記複数の光電変換部の上に跨って設けられた導光部と、を有し、
前記導光部は、前記絶縁層の屈折率よりも高い屈折率を有する高屈折率部と、前記絶縁層の屈折率よりも高く前記高屈折率部の屈折率よりも低い屈折率を有する低屈折率部とを含み、
前記高屈折率部は前記複数の光電変換部の各々の上に位置し、前記低屈折率部は前記分離部の上に位置していることを特徴とする光電変換装置。 - 前記低屈折率部は、前記或る平面内における幅よりも、前記受光面に平行で前記或る平面よりも前記光電変換部に近い別の平面内における幅が大きい、請求項1に記載の光電変換装置。
- 前記低屈折率部は、前記或る平面内において、前記高屈折率部で囲まれている、請求項1または2に記載の光電変換装置。
- 前記1つの受光素子は、前記複数の光電変換部の上に跨って設けられた波長選択部を有する、請求項1乃至3のいずれか1項に記載の光電変換装置。
- 前記高屈折率部の屈折率をn2、前記絶縁層の屈折率をn0、前記波長選択部を透過する光の主透過波長をλとして、前記光電変換部の受光面に沿った前記導光部の断面における前記高屈折率部の幅はλ/4√(n2 2−n0 2)以上である、請求項4に記載の光電変換装置。
- 前記絶縁層の屈折率と前記低屈折率部の屈折率との差が、前記低屈折率部の屈折率と前記高屈折率部の屈折率との差よりも大きい、請求項1乃至5のいずれか1項に記載の光電変換装置。
- 前記高屈折率部の屈折率が前記低屈折率部の屈折率の1.025倍以上、1.25倍以下である、請求項1乃至6のいずれか1項に記載の光電変換装置。
- 前記高屈折率部および前記低屈折率部が窒化シリコンからなる、請求項1乃至7のいずれか1項に記載の光電変換装置。
- 前記導光部は、前記或る平面内において、非回転対称な形状を有する、請求項1乃至8のいずれか1項に記載の光電変換装置。
- 前記1つの受光素子は、前記複数の光電変換部の上に跨って設けられた集光部を有する、請求項1乃至9のいずれか1項に記載の光電変換装置。
- 前記少なくとも1つの受光素子は、前記複数の受光素子が配列された受光領域の中央部に位置する第1受光素子と、前記受光領域の周辺部に位置する第2受光素子とを含み、前記第1受光素子の前記集光部の重心と前記第2受光素子の前記集光部の重心との距離は、前記第1受光素子の前記導光部の重心と前記第2受光素子の前記導光部の重心との距離よりも小さい、請求項10に記載の光電変換装置。
- 前記或る平面内において、前記複数の光電変換部が並ぶ第1方向における前記導光部の幅が、前記第1方向に直交する第2方向における前記導光部の幅よりも大きい、請求項1乃至11のいずれか1項に記載の光電変換装置。
- 前記或る平面内における前記導光部の形状は楕円形である、請求項1乃至12のいずれか1項に記載の光電変換装置。
- 前記高屈折率部は、前記或る平面内における幅よりも、前記受光面に平行で前記或る平面と前記受光面との間の別の平面内における幅が小さい、請求項1乃至13のいずれか1項に記載の光電変換装置。
- 前記低屈折率部は前記複数の光電変換部の各々の上にも位置している、請求項1乃至14のいずれか1項に記載の光電変換装置。
- 前記複数の光電変換部が並ぶ方向において、前記或る平面内における前記導光部の幅は前記複数の光電変換部の幅の和よりも小さい、請求項1乃至15のいずれか1項に記載の光電変換装置。
- 前記分離部は半導体領域によって構成されている、請求項1乃至16のいずれか1項に記載の光電変換装置。
- 請求項1乃至17のいずれか1項に記載の光電変換装置を備え、前記1つの受光素子から得られた信号に基づき、撮像および位相差検出方式による焦点検出を行う撮像システム。
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US14/724,667 US10276612B2 (en) | 2014-06-02 | 2015-05-28 | Photoelectric conversion apparatus and image pickup system |
CN201510294246.9A CN105321968B (zh) | 2014-06-02 | 2015-06-02 | 光电转换装置和图像拾取系统 |
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JP2017123380A (ja) * | 2016-01-06 | 2017-07-13 | ソニー株式会社 | 固体撮像素子および製造方法、並びに電子機器 |
JP6667431B2 (ja) | 2016-12-27 | 2020-03-18 | キヤノン株式会社 | 撮像装置、撮像システム |
JP6929057B2 (ja) * | 2016-12-27 | 2021-09-01 | キヤノン株式会社 | 光電変換素子、撮像システム |
US10847555B2 (en) | 2017-10-16 | 2020-11-24 | Panasonic Intellectual Property Management Co., Ltd. | Imaging device with microlens having particular focal point |
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