JP2014049514A - 側面入射型のフォトダイオードの製造方法、及び、半導体ウエハ - Google Patents
側面入射型のフォトダイオードの製造方法、及び、半導体ウエハ Download PDFInfo
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Abstract
【解決手段】側面入射型のフォトダイオードPD1の製造方法は、半導体基板1における複数の素子形成領域2それぞれに、第一導電型の不純物添加層7を形成する工程と、複数の素子形成領域2それぞれに、第二導電型の不純物添加層9を形成する工程と、隣り合う素子形成領域2同士の境界となる位置に、主面1aから半導体基板1の厚み方向に延びる溝11をエッチングにより形成し、素子形成領域2の側面2aを露出させる工程と、露出した素子形成領域2の側面2a上に、絶縁膜13を形成する工程と、半導体基板1の主面1a側に、対応する不純物添加層7,9毎に電極13,15を形成する工程と、半導体基板1を複数の素子形成領域2毎に個片化する工程と、を備える。
【選択図】図11
Description
図1〜図13を参照して、第一実施形態に係る側面入射型のフォトダイオードの製造過程について説明する。図1〜図13は、第一実施形態に係る側面入射型のフォトダイオードの製造過程を説明するための図である。
図19〜図29を参照して、第二実施形態に係る側面入射型のフォトダイオードの製造過程について説明する。図19〜図29は、第二実施形態に係る側面入射型のフォトダイオードの製造過程を説明するための図である。
Claims (11)
- 側面入射型のフォトダイオードの製造方法であって、
複数の素子形成領域を含み且つ互いに対向する第一及び第二主面を有する半導体基板を準備する工程と、
前記半導体基板における前記複数の素子形成領域それぞれに、第一導電型の不純物添加層を形成する工程と、
前記半導体基板における前記複数の素子形成領域それぞれに、第二導電型の不純物添加層を形成する工程と、
前記複数の素子形成領域のうち隣り合う素子形成領域同士の境界となる位置に、前記第一主面から前記半導体基板の厚み方向に延びる溝をエッチングにより形成し、前記素子形成領域の側面を露出させる工程と、
露出した前記素子形成領域の前記側面上に、絶縁膜を形成する工程と、
前記半導体基板の前記第一主面側に、対応する前記不純物添加層毎に電極を形成する工程と、
前記半導体基板を前記複数の素子形成領域毎に個片化する工程と、を備える。 - 請求項1に記載の製造方法であって、
前記絶縁膜を形成する前記工程では、前記絶縁膜として反射防止膜を形成する。 - 請求項1又は2に記載の製造方法であって、
前記半導体基板を個片化する前記工程では、前記半導体基板の内部に集光点を合わせてレーザ光を前記第二主面側から照射することで、前記複数の素子形成領域のうち隣り合う素子形成領域同士の境界に位置する切断予定ラインに沿って、切断の起点となる改質領域を前記半導体基板の内部に形成し、前記改質領域を起点として前記半導体基板を切断して個片化する。 - 請求項1〜3のいずれか一項に記載の製造方法であって、
前記素子形成領域の前記側面を露出させる前記工程では、前記溝を、前記複数の素子形成領域のうち第一方向で隣り合う素子形成領域同士の境界となる位置に、前記第一方向に直交する方向に延びるように形成する一方、前記複数の素子形成領域のうち前記第一方向に交差する第二方向で隣り合う素子形成領域同士の境界となる位置には、溝を形成しない。 - 請求項4に記載の製造方法であって、
前記溝を、対応する前記素子形成領域毎に、物理的に離間して形成する。 - 請求項1〜5のいずれか一項に記載の製造方法であって、
前記素子形成領域の前記側面を露出させる前記工程を、第一導電型の前記不純物添加層を形成する前記工程と、第二導電型の前記不純物添加層を形成する前記工程と、の後に、実施する。 - 請求項1〜3のいずれか一項に記載の製造方法であって、
前記素子形成領域の前記側面を露出させる前記工程を、第一導電型の前記不純物添加層を形成する前記工程の前に、実施し、
前記素子形成領域の前記側面を露出させる前記工程では、前記溝を、前記複数の素子形成領域のうち第一方向で隣り合う素子形成領域同士の境界となる位置に、前記第一方向に直交する方向に延びるように形成し、前記複数の素子形成領域のうち前記第一方向に交差する第二方向で隣り合う素子形成領域同士の境界となる位置に、前記第二方向に直交する方向に延びるように形成し、前記第一方向に直交する方向に延びるように形成された前記溝と、前記第二方向に直交する方向に延びるように形成された前記溝と、が交差して連続しており、
第一導電型の前記不純物添加層を形成する前記工程では、前記素子形成領域における、前記第一方向に直交する方向に延びるように形成された前記溝に露出する面と、前記第二方向に直交する方向に延びるように形成された前記溝に露出する面と、にわたって第一導電型の前記不純物添加層を形成する。 - 請求項1〜7のいずれか一項に記載の製造方法であって、
前記半導体基板が、半導体ウエハである。 - 複数の素子形成領域を含み且つ互いに対向する第一及び第二主面を有する半導体ウエハであって、
前記複数の素子形成領域それぞれに形成された第一導電型の不純物添加層と、
前記複数の素子形成領域それぞれに形成された第二導電型の不純物添加層と、
前記半導体基板の前記第一主面側に、前記不純物添加層毎に対応して形成された電極と、を備え、
前記素子形成領域の側面が露出するように、前記複数の素子形成領域のうち隣り合う素子形成領域同士の境界となる位置に、前記第一主面から前記半導体ウエハの厚み方向に延びる溝がエッチングにより形成されており、
露出した前記素子形成領域の前記側面上に、絶縁膜が形成されている。 - 請求項9に記載の半導体ウエハであって、
前記溝が、前記複数の素子形成領域のうち第一方向で隣り合う素子形成領域同士の境界となる位置に、前記第一方向に直交する方向に延びるように形成されており、
前記複数の素子形成領域のうち前記第一方向に交差する第二方向で隣り合う素子形成領域同士の境界となる位置には、溝が形成されていない。 - 請求項10に記載の半導体ウエハであって、
前記溝は、対応する前記素子形成領域毎に、物理的に離間して形成されている。
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JP2012189402A JP6084401B2 (ja) | 2012-08-30 | 2012-08-30 | 側面入射型のフォトダイオードの製造方法 |
US14/012,273 US8993361B2 (en) | 2012-08-30 | 2013-08-28 | Manufacturing method for edge illuminated type photodiode and semiconductor wafer |
US14/627,238 US9385151B2 (en) | 2012-08-30 | 2015-02-20 | Manufacturing method for edge illuminated type photodiode and semiconductor wafer |
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JP5862733B1 (ja) * | 2014-09-08 | 2016-02-16 | 富士ゼロックス株式会社 | 半導体片の製造方法 |
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JP5862733B1 (ja) * | 2014-09-08 | 2016-02-16 | 富士ゼロックス株式会社 | 半導体片の製造方法 |
JP2016058474A (ja) * | 2014-09-08 | 2016-04-21 | 富士ゼロックス株式会社 | 半導体片の製造方法 |
JP5884935B1 (ja) * | 2015-10-28 | 2016-03-15 | 富士ゼロックス株式会社 | 半導体片の製造方法 |
JP2016058741A (ja) * | 2015-10-28 | 2016-04-21 | 富士ゼロックス株式会社 | 半導体片の製造方法 |
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US11597036B2 (en) | 2018-12-27 | 2023-03-07 | Fujitsu Optical Components Limited | Optical module and manufacturing method thereof |
KR20210094402A (ko) * | 2020-01-21 | 2021-07-29 | 한국과학기술연구원 | 3차원 적층구조체의 제조방법, 이에 의해 제조된 3차원 적층구조체 및 이를 이용한 광센서 |
KR102429848B1 (ko) * | 2020-01-21 | 2022-08-05 | 한국과학기술연구원 | 3차원 적층구조체의 제조방법, 이에 의해 제조된 3차원 적층구조체 및 이를 이용한 광센서 |
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US20140061840A1 (en) | 2014-03-06 |
US8993361B2 (en) | 2015-03-31 |
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US9385151B2 (en) | 2016-07-05 |
US20150171127A1 (en) | 2015-06-18 |
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