JP2018163968A - 紫外線受光素子を有する半導体装置およびその製造方法 - Google Patents
紫外線受光素子を有する半導体装置およびその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 258
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000005855 radiation Effects 0.000 title 1
- 239000000758 substrate Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims description 21
- 238000005468 ion implantation Methods 0.000 claims description 5
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- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 2
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- 239000000969 carrier Substances 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 3
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 208000000453 Skin Neoplasms Diseases 0.000 description 1
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- 238000000137 annealing Methods 0.000 description 1
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- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 201000000849 skin cancer Diseases 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
【解決手段】第1および第2の半導体受光素子1a,1bは、N型の半導体基板11に形成された第1のP型半導体領域21と、第1のP型半導体領域21内に形成された第1のN型半導体層領域22と、第1のP型半導体領域21内に形成された高濃度のP型半導体領域23と、N型層領域22内に設けられた高濃度のN型半導体領域24と、を備え、半導体基板11上には絶縁酸化膜31が設けられている。第1および第2の半導体受光素子1a,1bには異なる膜厚の絶縁酸化膜31が形成されている。
【選択図】図2
Description
の差分特性により、紫外線の波長領域にのみに感度を持つ素子が提案されている。(例えば、特許文献3参照)
まず、第1の半導体受光素子と第2の半導体受光素子とを備えた紫外線受光素子を有する半導体装置であって、
前記第1の半導体受光素子は、半導体基板に形成された第1の第1導電型半導体領域と前記第1の第1導電型半導体領域内に形成された第1の第2導電型半導体領域からなるPN接合を有する第1のフォトダイオードを備え、前記第2の半導体受光素子は、前記第1のフォトダイオードと同じ構成を有する第2のフォトダイオードを備え、
前記第1の半導体受光素子は前記第1のフォトダイオード上に膜厚が50nm〜90nmである第1の絶縁酸化膜を有し、前記第2の半導体受光素子は前記第2のフォトダイオード上に前記第1の絶縁酸化膜の膜厚よりも20〜40nm薄い膜厚の第2の絶縁酸化膜を有することを特徴とする紫外線受光素子を有する半導体装置とする。
前記第1の半導体受光素子および前記第2の半導体受光素子の形成領域において、
半導体基板に第1の第1導電型半導体領域を形成する工程と、
前記第1の第1導電型半導体領域内に第1の第2導電型半導体領域を設けて、前記第1の第1導電型半導体領域と前記第1の第2導電型半導体領域とのPN接合を有する第1および第2のフォトダイオードをそれぞれ形成する工程と、
前記第1の半導体受光素子の前記第1のフォトダイオード上に膜厚が50nm〜90nmである第1の絶縁酸化膜を形成する工程と、
前記第2の半導体受光素子の前記第2のフォトダイオード上に前記第1の絶縁酸化膜よりも20〜40nm薄い膜厚の第2の絶縁酸化膜を形成する工程と、
前記第1の絶縁酸化膜および前記第2の絶縁酸化膜上に配線を形成する工程と、を備えることを特徴とする紫外線受光素子を有する半導体装置の製造方法とする。
まず、半導体基板11内にイオン注入および熱拡散処理にて第1のP型半導体領域21を形成し、次いで、同様の方法にて第1のP型半導体領域21内に第1のN型半導体層領域22を形成して、第1のP型半導体領域21と第1のN型半導体層領域22とのPN接合を有するフォトダイオード51を形成する。そして、第1の半導体受光素子1aを形成する領域には相対的に厚い絶縁酸化膜31を形成し、第2の半導体受光素子1bを形成する領域には相対的に薄い絶縁酸化膜31を形成する。
1a 第1の半導体受光素子
1b 第2の半導体受光素子
11 N型半導体基板
12 P型半導体基板
21 第1のP型半導体領域
22、26 第1のN型半導体層領域
23、27 高濃度のP型半導体領域
24、28 高濃度のN型半導体領域
25 第2のP型半導体領域
31 絶縁酸化膜
41 カソード電極
42 アノード電極
51 フォトダイオード
61 配線
6a 第1の受光領域の配線開口幅
6b 第2の受光領域の配線開口幅
71 変質層
Claims (12)
- 第1の半導体受光素子と第2の半導体受光素子とを備えた紫外線受光素子を有する半導体装置であって、
前記第1の半導体受光素子は、半導体基板に形成された第1の第1導電型半導体領域と前記第1の第1導電型半導体領域内に形成された第1の第2導電型半導体領域からなるPN接合を有する第1のフォトダイオードを備え、前記第2の半導体受光素子は、前記第1のフォトダイオードと同じ構成を有する第2のフォトダイオードを備え、
前記第1の半導体受光素子は前記第1のフォトダイオード上に膜厚が50nm〜90nmである第1の絶縁酸化膜を有し、前記第2の半導体受光素子は前記第2のフォトダイオード上に前記第1の絶縁酸化膜の膜厚よりも20〜40nm薄い膜厚の第2の絶縁酸化膜を有することを特徴とする紫外線受光素子を有する半導体装置。 - 前記第1の半導体受光素子の第1の受光領域の大きさが前記第2の半導体受光素子の第2の受光領域の大きさと異なることを特徴とする請求項1記載の紫外線受光素子を有する半導体装置。
- 前記第1の受光領域の大きさが前記第2の受光領域の大きさよりも小さいことを特徴とする請求項2に記載の紫外線受光素子を有する半導体装置。
- 前記第1の第2導電型半導体領域と前記半導体基板の表面との間に第2の第1導電型半導体領域を設けたことを特徴とする請求項1乃至請求項3のいずれか1項に記載の紫外線受光素子を有する半導体装置。
- 前記第1のフォトダイオードのPN接合および前記第2のフォトダイオードのPN接合よりも前記半導体基板の裏面に近い位置に変質層を設けたことを特徴とする請求項1乃至請求項4のいずれか1項に記載の紫外線受光素子を有する半導体装置。
- 前記変質層が前記半導体基板の裏面に露出していることを特徴とする請求項5に記載の紫外線受光素子を有する半導体装置。
- 第1の半導体受光素子と第2の半導体受光素子とを備えた紫外線受光素子を有する半導体装置の製造方法であって、
前記第1の半導体受光素子および前記第2の半導体受光素子の形成領域において、
半導体基板に第1の第1導電型半導体領域を形成する工程と、
前記第1の第1導電型半導体領域内に第1の第2導電型半導体領域を設けて、前記第1の第1導電型半導体領域と前記第1の第2導電型半導体領域とのPN接合を有する第1および第2のフォトダイオードをそれぞれ形成する工程と、
前記第1の半導体受光素子の前記第1のフォトダイオード上に膜厚が50nm〜90nmである第1の絶縁酸化膜を形成する工程と、
前記第2の半導体受光素子の前記第2のフォトダイオード上に前記第1の絶縁酸化膜よりも20〜40nm薄い膜厚の第2の絶縁酸化膜を形成する工程と、
前記第1の絶縁酸化膜および前記第2の絶縁酸化膜上に配線を形成する工程と、を備えることを特徴とする紫外線受光素子を有する半導体装置の製造方法。 - 前記配線を形成する工程において、前記第1の半導体受光素子の受光領域の配線開口幅と前記第2の半導体受光素子の受光領域の開口配線幅を異なる寸法で形成することを特徴とする請求項7記載の紫外線受光素子を有する半導体装置の製造方法。
- 前記第1の第1導電型半導体領域内に前記第1の第2導電型半導体領域を設けた後に、前記第1の第2導電型半導体領域と前記半導体基板との間に第2の第1導電型半導体領域を形成する工程をさらに備えることを特徴とする請求項7または請求項8に記載の紫外線受光素子を有する半導体装置の製造方法。
- 前記配線を形成する工程の後に、前記第1のフォトダイオードのPN接合および前記第2のフォトダイオードのPN接合よりも前記半導体基板の裏面に近い位置に変質層を設ける工程をさらに備えることを特徴とする請求項7乃至請求項9のいずれか1項に記載の紫外線受光素子を有する半導体装置の製造方法。
- 前記変質層を設ける工程において、前記半導体基板の裏面から透過性のある波長のレーザ光対物レンズ光学系で前記半導体基板の内部に焦点を結ぶように集光する方法を用いることを特徴とする請求項10記載の紫外線受光素子を有する半導体装置の製造方法。
- 前記変質層を設ける工程において、前記半導体基板の裏面からイオン注入を行い、その後に結晶性回復工程を伴わないことを特徴とする請求項10記載の紫外線受光素子を有する半導体装置の製造方法。
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TW107108517A TW201838197A (zh) | 2017-03-24 | 2018-03-14 | 具有紫外線受光元件的半導體裝置及其製造方法 |
US15/928,433 US10326029B2 (en) | 2017-03-24 | 2018-03-22 | Semiconductor device including an ultraviolet light receiving element and method of manufacturing the same |
CN201810245513.7A CN108630712A (zh) | 2017-03-24 | 2018-03-23 | 具有紫外线光接收元件的半导体装置及其制造方法 |
KR1020180034054A KR20180108511A (ko) | 2017-03-24 | 2018-03-23 | 자외선 수광 소자를 갖는 반도체 장치 및 그 제조 방법 |
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- 2018-03-22 US US15/928,433 patent/US10326029B2/en not_active Expired - Fee Related
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CN108630712A (zh) | 2018-10-09 |
KR20180108511A (ko) | 2018-10-04 |
US10326029B2 (en) | 2019-06-18 |
TW201838197A (zh) | 2018-10-16 |
US20180277690A1 (en) | 2018-09-27 |
JP6976067B2 (ja) | 2021-12-01 |
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