JP5988020B2 - 固体撮像素子及びその製造方法 - Google Patents
固体撮像素子及びその製造方法 Download PDFInfo
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Description
基板に対して周期的に2次元配列された可視光検出器及び赤外光検出器と、
前記基板内に設けられ、かつ前記可視光検出器及び前記赤外光検出器の信号を時系列信号として外部に出力する信号読出回路を有し、
前記可視光検出器と前記赤外光検出器とは、前記基板に対して上下方向に重なって同一光軸上に配置されていることを特徴とする。
可視光検出器と赤外光検出器とが基板に対して周期的に2次元配列され、前記基板内に設けられた信号読出回路によって前記可視光検出器と前記赤外光検出器の信号を時系列信号として外部に出力する固体撮像素子の製造方法であって、
トランジスタのソース・ドレイン領域形成工程と、
前記基板内に前記信号読出回路を形成する際、前記トランジスタのソース・ドレイン領域形成工程の前後何れかの直近の工程において、可視光検出層を形成する工程と、
前記基板上にポリイミド層を形成する工程と、
前記ポリイミド層上であって前記可視光検出層の直上の位置にフォトレジストパターンを形成する工程と、
前記フォトレジストパターンを熱処理によってリフローしてレンズ形状に成形する工程と、
エッチバックによって前記フォトレジストパターンのレンズ形状を前記ポリイミド層に転写して、ポリイミドから成るマイクロレンズを形成する工程と、
前記マイクロレンズを保護するマイクロレンズ保護膜を形成する工程と、
犠牲層を用いて前記赤外光検出器を形成する工程と有し、
前記可視光検出器と前記赤外光検出器とは、前記基板に対して上下方向に重なって同一光軸上に配置されていることを特徴とする。
最初に、図8を参照して、本発明の特徴がより明確になるように、関連技術として特許文献1に記載された固体撮像素子の構造について簡単に説明する。ここで、図8は、撮像領域の一部の断面図である。
本発明の実施の形態は、上記関連技術の問題点を解決するためのもので、量子型可視光検出器と熱型赤外光検出器とを有し、可視光撮像と赤外光撮像とを同時に行なう固体撮像素子において、水平・垂直両方向の解像度が低下することなく、かつ各ポイントのデータ精度も高い固体撮像素子及びその製造方法を提供する。
次に、本発明の実施例について説明する。
2 可視光検出層
3 可視用垂直MOSスイッチトランジスタ
4 赤外用垂直MOSスイッチトランジスタ
5 VIA接続電極(拡散層−第1層Al配線間)
6 第1層Al配線
7 VIA接続電極(第1層Al配線−第2層Al配線間)
8 第2層Al配線
9 VIA接続電極(第2層Al配線−接続電極間)
10 接続電極
11 接続電極保護膜
12 マイクロレンズ
13 マイクロレンズ保護膜
14 下層支持膜
15 ボロメータ膜
16 ボロメータ保護膜
17 電極配線
18 上層支持膜
19 支持脚
19a 水平部
19b 立ち上り部
20 ダイアフラム
21 庇
22 ボロメータ型赤外線検出器
23 可視光検出器(フォトダイオード)
24 赤外用垂直MOSスイッチ
25 可視用垂直MOSスイッチ
26 赤外用駆動線
27 可視用駆動線
28 赤外用垂直信号線
29 可視用垂直信号線
30 赤外用垂直走査回路
31 可視用垂直走査回路
32 積分回路
33 赤外用水平MOSスイッチ
34 可視用水平MOSスイッチ
35 赤外用水平走査回路
36 可視用水平走査回路
37 第1層ポリイミド
38 フォトレジストパターン
39 第2層ポリイミド(第1層犠牲層)
40 第3層ポリイミド(第2層犠牲層)
41 可視光検出用画素
42 赤外光検出用画素
43a 信号線(可視用)
43b 信号線(赤外用)
44 断熱構造体
45 ボロメータ
46 Si基板
47 フィールド酸化膜
48 フォトダイオード
49a 読出回路(可視用)
49b 読出回路(赤外用)
50 誘電体膜
Claims (4)
- 基板に対して周期的に2次元配列された可視光検出器及び赤外光検出器と、
前記基板内に設けられ、かつ前記可視光検出器及び前記赤外光検出器の信号を時系列信号として外部に出力する信号読出回路を有し、
前記可視光検出器と前記赤外光検出器とは、前記基板に対して上下方向に重なって同一光軸上に配置され、
前記可視光検出器の上に前記赤外光検出器が配置されており、
前記可視光検出器と前記赤外光検出器との間には単一の半球状のマイクロレンズが設けられており、
入射光中の赤外線は前記赤外光検出器により検出され、
入射光中の可視光線は、前記単一の半球状のマイクロレンズによって集光されて前記可視光検出器により検出され、
前記赤外光検出器は、
支持脚と、
前記支持脚によって前記基板から中空に持上げられたダイアフラムを有し、
前記ダイアフラムは前記基板から熱的に分離された状態になっており、
前記可視光検出器は、前記基板内に設けられた可視光検出層を有し、
前記単一の半球状のマイクロレンズは、前記ダイアフラムの空洞内であって前記可視光検出層の直上の位置に設けられており、
入射した可視光線は、前記ダイアフラムを透過し、前記単一の半球状のマイクロレンズによって集光されて前記可視光検出層に入射することを特徴とする固体撮像素子。 - 前記マイクロレンズはマイクロレンズ保護膜で覆われていることを特徴とする請求項1に記載の固体撮像素子。
- 前記マイクロレンズはポリイミドから成ることを特徴とする請求項1又は2に記載の固体撮像素子。
- 前記ダイアフラムは、温度変化検出用のボロメータ膜を有し、
入射した赤外線は、前記ダイアフラムに吸収されて熱となり前記ボロメータ膜の抵抗変化を起こすことにより前記赤外光を検出することを特徴とする請求項1に記載の固体撮像素子。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2012068674A JP5988020B2 (ja) | 2012-03-26 | 2012-03-26 | 固体撮像素子及びその製造方法 |
US13/793,607 US9287301B2 (en) | 2012-03-26 | 2013-03-11 | Solid-state image sensing device with detecting units having a microlens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2012068674A JP5988020B2 (ja) | 2012-03-26 | 2012-03-26 | 固体撮像素子及びその製造方法 |
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DE102013021519A1 (de) * | 2013-12-12 | 2015-06-18 | Connaught Electronics Ltd. | Bilderfassungseinrichtung mit einem Bildsensor und einem thermischen Infrarotsensor sowie Kraftfahrzeug mit einer Bilderfassungseinrichtung |
CN105206636B (zh) * | 2015-08-31 | 2018-05-29 | 上海集成电路研发中心有限公司 | 可调节的混合成像探测器像元结构及其制备方法 |
CN105244357B (zh) * | 2015-08-31 | 2018-06-26 | 上海集成电路研发中心有限公司 | 可见光红外混合成像探测器像元结构及其制备方法 |
CN105185802B (zh) * | 2015-08-31 | 2018-05-01 | 上海集成电路研发中心有限公司 | 单芯片可见光红外混合成像探测器像元结构及制备方法 |
CN105206637B (zh) * | 2015-08-31 | 2018-06-22 | 上海集成电路研发中心有限公司 | 具有台阶支撑的混合成像探测器像元结构及其制备方法 |
CN105161508B (zh) * | 2015-08-31 | 2018-05-01 | 上海集成电路研发中心有限公司 | 增强红外透过性的混合成像探测器像元结构及其制备方法 |
CN108351254B (zh) * | 2016-09-02 | 2021-10-22 | 索尼半导体解决方案公司 | 摄像装置 |
FR3056292B1 (fr) * | 2016-09-22 | 2020-11-20 | Commissariat Energie Atomique | Structure de detection de rayonnements electromagnetiques de type bolometre et procede de fabrication d'une telle structure |
CN210120140U (zh) * | 2016-10-03 | 2020-02-28 | 菲力尔系统公司 | 光电装置封装 |
US12083027B2 (en) | 2017-03-02 | 2024-09-10 | Optimotion Implants LLC | Universal femoral trial system and methods |
US11406502B2 (en) | 2017-03-02 | 2022-08-09 | Optimotion Implants LLC | Orthopedic implants and methods |
JP6440805B1 (ja) | 2017-11-16 | 2018-12-19 | 三菱電機株式会社 | 熱型赤外線検出器およびその製造方法 |
KR20220043556A (ko) * | 2020-09-29 | 2022-04-05 | 에스케이하이닉스 주식회사 | 이미지 센싱 장치 |
CN114323089B (zh) * | 2020-10-12 | 2025-02-25 | 群创光电股份有限公司 | 光检测元件 |
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US5373182A (en) * | 1993-01-12 | 1994-12-13 | Santa Barbara Research Center | Integrated IR and visible detector |
US6107618A (en) * | 1997-07-14 | 2000-08-22 | California Institute Of Technology | Integrated infrared and visible image sensors |
US6097031A (en) * | 1997-07-25 | 2000-08-01 | Honeywell Inc. | Dual bandwith bolometer |
JPH11214668A (ja) * | 1997-11-20 | 1999-08-06 | Nikon Corp | 固体撮像装置、並びに受光素子 |
US6198147B1 (en) * | 1998-07-06 | 2001-03-06 | Intel Corporation | Detecting infrared and visible light |
FR2781927B1 (fr) * | 1998-07-28 | 2001-10-05 | Commissariat Energie Atomique | Dispositif de detection de rayonnements multispectraux infrarouge/visible |
JP4724414B2 (ja) * | 2004-12-02 | 2011-07-13 | 富士フイルム株式会社 | 撮像装置、デジタルカメラ、及びカラー画像データ生成方法 |
US20060119724A1 (en) | 2004-12-02 | 2006-06-08 | Fuji Photo Film Co., Ltd. | Imaging device, signal processing method on solid-state imaging element, digital camera and controlling method therefor and color image data generating method |
JP2006343229A (ja) | 2005-06-09 | 2006-12-21 | Mitsubishi Electric Corp | イメージセンサ |
KR100670477B1 (ko) * | 2005-09-08 | 2007-01-16 | 매그나칩 반도체 유한회사 | Lto 보호막을 생략할 수 있는 이미지센서 제조 방법 |
JP4858210B2 (ja) | 2007-02-16 | 2012-01-18 | 三菱電機株式会社 | 撮像素子 |
CN102782862B (zh) * | 2010-02-26 | 2015-08-26 | 精材科技股份有限公司 | 芯片封装体及其制造方法 |
JP2011238877A (ja) * | 2010-05-13 | 2011-11-24 | Panasonic Corp | カラー固体撮像素子、カラー固体撮像素子の製造方法及びカラー固体撮像装置の製造方法 |
US8865507B2 (en) * | 2011-09-16 | 2014-10-21 | Sionyx, Inc. | Integrated visible and infrared imager devices and associated methods |
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