JP6425427B2 - 光電変換装置およびその製造方法、撮像システム - Google Patents
光電変換装置およびその製造方法、撮像システム Download PDFInfo
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Description
前記受光素子は、第1光電変換部および第2光電変換部と、前記第1光電変換部と前記第2光電変換部の間に位置する分離部と、少なくとも1つの絶縁層を含む絶縁膜で囲まれ、前記第1光電変換部と第2光電変換部の上に跨って設けられた導光部と、を備え、前記第1光電変換部と前記第2光電変換部が並ぶ方向を第1方向とし、前記第1光電変換部および前記第2光電変換部と前記導光部が並ぶ方向を第2方向として、前記導光部は、前記絶縁層の屈折率と同じかそれよりも低い屈折率を有する低屈折率部と、前記低屈折率部の屈折率よりも高い屈折率を有する高屈折率部と、を含み、前記低屈折率部は、前記分離部の上に位置し、かつ、前記第1方向において前記高屈折率部に挟まれており、前記第2方向において前記分離部から離れた第1の位置での前記低屈折率部の前記第1方向における幅は、前記第1の位置よりも前記分離部に近い第2の位置での前記低屈折率部の前記第1方向における幅より小さいことを特徴とする。
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
206 低屈折率部
207 高屈折率部
Claims (9)
- 受光素子を有する光電変換装置であって、
前記受光素子は、第1光電変換部および第2光電変換部と、前記第1光電変換部と前記第2光電変換部の間に位置する分離部と、少なくとも1つの絶縁層を含む絶縁膜で囲まれ、前記第1光電変換部と第2光電変換部の上に跨って設けられた導光部と、を備え、
前記第1光電変換部と前記第2光電変換部が並ぶ方向を第1方向とし、前記第1光電変換部および前記第2光電変換部と前記導光部が並ぶ方向を第2方向とし、平面視において前記第1方向と直交する方向を第3方向として、
前記導光部は、前記絶縁層の屈折率と同じかそれよりも低い屈折率を有する低屈折率部と、前記低屈折率部の屈折率よりも高い屈折率を有する高屈折率部と、を含み、前記低屈折率部は、前記分離部の上に位置し、かつ、前記第1方向において前記高屈折率部に挟まれており、
前記第2方向において前記分離部から離れた第1の位置での前記低屈折率部の前記第1方向における幅は、前記第1の位置よりも前記分離部に近い第2の位置での前記低屈折率部の前記第1方向における幅より小さく、
前記第1の位置における前記第3方向における幅が、前記第2の位置における前記第3方向における幅よりも小さいことを特徴とする光電変換装置。 - 前記第1の位置において、前記低屈折率部の前記第3方向における幅は前記第1方向における幅よりも大きく、
前記第2の位置において、前記低屈折率部の前記第3方向における幅は前記第1方向における幅よりも大きいことを特徴とする請求項1に記載の光電変換装置。 - 前記高屈折率部は、前記絶縁層の屈折率よりも高い屈折率を有する、請求項1または2に記載の光電変換装置。
- 前記低屈折率部は、気体または真空空間によって構成されている、請求項1乃至3のいずれか1項に記載の光電変換装置。
- 前記導光部の上に第2高屈折率部が配され、前記低屈折率部は、前記第2方向において、前記第2高屈折率部と前記分離部の間に位置する、請求項1乃至4のいずれか1項に記載の光電変換装置。
- 前記受光素子は、前記第3方向において前記第1光電変換部に並ぶ第3光電変換部と、前記第3方向において前記第2光電変換部に並ぶ第4光電変換部と、をさらに備え、前記第2の位置での前記低屈折率部の前記第1方向および前記第3方向に沿った平面における断面形状は十字形である、請求項1乃至5のいずれか1項に記載の光電変換装置。
- 請求項1乃至6に記載の光電変換装置の製造方法であって、
前記絶縁膜に設けられた開口部の上に部材を形成し、
前記部材を遮蔽部材として、前記開口部内に前記高屈折率部となる材料を堆積させることで、前記遮蔽部材の下に前記低屈折率部を形成する、光電変換装置の製造方法。 - 前記開口部の上に部材を形成する工程では、前記開口部内に犠牲部材を形成し、前記犠牲部材の上に前記遮蔽部材となる前記部材を形成し、前記犠牲部材を除去する、請求項7に記載の光電変換装置の製造方法。
- 請求項1乃至5のいずれか1項に記載の光電変換装置を備える撮像システムであって、前記受光素子で得られた信号に基づいて撮像および焦点検出を行う撮像システム。
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US14/739,854 US9312289B2 (en) | 2014-06-16 | 2015-06-15 | Photoelectric conversion apparatus, manufacturing method thereof, and image pickup system |
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JP2014096476A (ja) * | 2012-11-09 | 2014-05-22 | Sharp Corp | 固体撮像素子及びその製造方法 |
JP2014225536A (ja) * | 2013-05-15 | 2014-12-04 | キヤノン株式会社 | 固体撮像装置及びカメラ |
JP6173259B2 (ja) * | 2014-06-02 | 2017-08-02 | キヤノン株式会社 | 光電変換装置および撮像システム |
JP6444066B2 (ja) * | 2014-06-02 | 2018-12-26 | キヤノン株式会社 | 光電変換装置および撮像システム |
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