JP5115937B2 - 固体撮像素子及びその製造方法 - Google Patents
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- 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
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- 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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- H01L27/14601—Structural or functional details thereof
- H01L27/14609—Pixel-elements with integrated switching, control, storage or amplification elements
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- H—ELECTRICITY
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- 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
- H01L27/146—Imager structures
- H01L27/14601—Structural or functional details thereof
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- H01L27/144—Devices controlled by radiation
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Description
光を受光して光電荷を生成するフォトダイオードと、
前記フォトダイオードの受光面の中央部に形成された第1領域、及び、該第1領域と電気的に接続され、前記フォトダイオードの受光面の外側に形成された第2領域から成るフローティング領域と、
前記フローティング領域の第1領域を取り囲むようにゲートが配設された転送トランジスタと、
を備えることを特徴としている。
2、2a、2b…画素領域
10…画素
11…光電変換領域
12…画素回路領域
13…配線領域
14、141…画素出力線
15…駆動ライン
31…フォトダイオード
32…転送トランジスタ
33、331、332…フローティングディフュージョン
333…金属配線
34…蓄積トランジスタ
35…リセットトランジスタ
36…蓄積キャパシタ
37、40…トランジスタ
38、41…選択トランジスタ
39…電流源
43…ソースフォロアアンプ
60…n型シリコン半導体基板
61…p型ウエル領域
62…n型半導体領域
63…p+型半導体領域
図12は光電荷蓄積時間が短い場合の動作モードの駆動タイミング図、図13はこの動作における各画素10内の概略ポテンシャル図である。なお、図13(後述の図15も同様)でCPD、CFD、CCSはそれぞれフォトダイオード31、フローティングディフュージョン33、蓄積キャパシタ36の容量を示し、CFD+CCSはフローティングディフュージョン33と蓄積キャパシタ36との合成容量を示す。
次に、光電荷蓄積時間が相対的に長い場合の動作について説明する。図14は光電荷蓄積時間が相対的に長い場合の駆動タイミング図、図15はこの動作における各画素内の概略ポテンシャル図である。
Claims (6)
- 複数の画素が配置された固体撮像素子であって、各画素は、
光を受光して光電荷を生成するフォトダイオードと、
前記フォトダイオードの受光面の中央部に形成された第1領域、及び、該第1領域と電気的に接続され、前記フォトダイオードの受光面の外側に形成された第2領域から成るフローティング領域と、
前記フローティング領域の第1領域を取り囲むようにゲートが配設された転送トランジスタと、
を備えることを特徴とする固体撮像素子。 - 請求項1に記載の固体撮像素子であって、前記フォトダイオードで生成された光電荷が受光面の中央側に集まるように、前記受光面の周辺部から中央部に向かってポテンシャルを変化させるようにしたことを特徴とする固体撮像素子。
- 請求項2に記載の固体撮像素子であって、前記フォトダイオードの受光面の周辺部から中央側に向かって、基板に注入する不純物の濃度及び/又は深さを傾斜状に変化させたことを特徴とする固体撮像素子。
- 請求項2に記載の固体撮像素子であって、前記フォトダイオードの受光面の周辺部から中央側に向かって、基板に注入する不純物の濃度及び/又は深さを階段状に変化させたことを特徴とする固体撮像素子。
- 請求項2〜4のいずれかに記載の固体撮像素子を製造する製造方法であって、複数のフォトマスクを用いて不純物イオンの打ち込み深さを変えることにより、フォトダイオードの受光面の周辺部から中央に向かってポテンシャルを変化させることを特徴とする固体撮像素子の製造方法。
- 請求項2〜4のいずれかに記載の固体撮像素子を製造する製造方法であって、複数のフォトマスクを用いて不純物イオンの打ち込み量を変えることにより、フォトダイオードの受光面の周辺部から中央に向かってポテンシャルを変化させることを特徴とする固体撮像素子の製造方法。
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JP2009531126A JP5115937B2 (ja) | 2007-09-05 | 2008-09-04 | 固体撮像素子及びその製造方法 |
PCT/JP2008/002428 WO2009031304A1 (ja) | 2007-09-05 | 2008-09-04 | 固体撮像素子及びその製造方法 |
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US (1) | US8569805B2 (ja) |
EP (1) | EP2192615A4 (ja) |
JP (1) | JP5115937B2 (ja) |
KR (1) | KR101105635B1 (ja) |
CN (1) | CN101796643B (ja) |
TW (1) | TW200921907A (ja) |
WO (1) | WO2009031304A1 (ja) |
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JP5697371B2 (ja) * | 2010-07-07 | 2015-04-08 | キヤノン株式会社 | 固体撮像装置および撮像システム |
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JP5751766B2 (ja) | 2010-07-07 | 2015-07-22 | キヤノン株式会社 | 固体撮像装置および撮像システム |
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JP7005459B2 (ja) * | 2018-09-13 | 2022-01-21 | 株式会社東芝 | 固体撮像素子 |
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KR20210002880A (ko) | 2019-07-01 | 2021-01-11 | 에스케이하이닉스 주식회사 | 픽셀 및 이를 포함하는 이미지 센서 |
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Patent Citations (3)
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JP2003218332A (ja) * | 2002-01-22 | 2003-07-31 | Sony Corp | 固体撮像素子 |
JP2007073864A (ja) * | 2005-09-09 | 2007-03-22 | Seiko Epson Corp | ラインセンサ及び画像情報読取装置 |
JP2007081083A (ja) * | 2005-09-14 | 2007-03-29 | Seiko Epson Corp | ラインセンサ及び画像情報読取装置 |
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WO2009031304A1 (ja) | 2009-03-12 |
CN101796643B (zh) | 2013-04-10 |
KR20100039885A (ko) | 2010-04-16 |
EP2192615A4 (en) | 2011-07-27 |
US8569805B2 (en) | 2013-10-29 |
CN101796643A (zh) | 2010-08-04 |
TW200921907A (en) | 2009-05-16 |
KR101105635B1 (ko) | 2012-01-18 |
JPWO2009031304A1 (ja) | 2010-12-09 |
EP2192615A1 (en) | 2010-06-02 |
US20100176423A1 (en) | 2010-07-15 |
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