JP6384822B2 - イメージセンサ及びその製造方法 - Google Patents
イメージセンサ及びその製造方法 Download PDFInfo
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- JP6384822B2 JP6384822B2 JP2013231151A JP2013231151A JP6384822B2 JP 6384822 B2 JP6384822 B2 JP 6384822B2 JP 2013231151 A JP2013231151 A JP 2013231151A JP 2013231151 A JP2013231151 A JP 2013231151A JP 6384822 B2 JP6384822 B2 JP 6384822B2
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- Prior art keywords
- image sensor
- photoelectric conversion
- conversion element
- layer
- switching element
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- 238000004519 manufacturing process Methods 0.000 title claims description 38
- 238000006243 chemical reaction Methods 0.000 claims description 111
- 239000004065 semiconductor Substances 0.000 claims description 73
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 69
- 239000000758 substrate Substances 0.000 claims description 46
- 230000000903 blocking effect Effects 0.000 claims description 40
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 27
- 239000001257 hydrogen Substances 0.000 claims description 25
- 229910052739 hydrogen Inorganic materials 0.000 claims description 25
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 8
- 238000002601 radiography Methods 0.000 claims 1
- 239000010408 film Substances 0.000 description 76
- 229910010271 silicon carbide Inorganic materials 0.000 description 33
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 25
- 238000002594 fluoroscopy Methods 0.000 description 16
- 230000001681 protective effect Effects 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 230000010354 integration Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 238000002161 passivation Methods 0.000 description 7
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 7
- 229920005591 polysilicon Polymers 0.000 description 7
- 230000005669 field effect Effects 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910003465 moissanite Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- -1 SiC Chemical class 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 229910007541 Zn O Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- XQPRBTXUXXVTKB-UHFFFAOYSA-M caesium iodide Chemical compound [I-].[Cs+] XQPRBTXUXXVTKB-UHFFFAOYSA-M 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002438 flame photometric detection Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Description
[実施形態1]
[実施形態2]
110、710 ゲート電極
120、720 ゲート絶縁膜
130、730 アモルファス酸化物半導体膜
135 チャネル保護膜
140、740 ドレイン電極
145、740 ソース電極
150、750 パッシベーション膜
160、430、760 平坦化膜
200 基板
300、800、912 光電変換素子
301 ダミー領域
302 絶縁領域
310、810 下部電極
320、341 p−a−Si:H層
330 i−a−Si:H層
340、321 n−a−Si:H層
345 n−a−SiC:H層
325、346、347 p−a−SiC:H層
350、830 上部電極
410 共通電極
420 保護膜
500 ブロッキング層
600 蛍光体
700 画素光電変換膜
820 光電変換膜
900 イメージセンサ
910 画素
911 TFT
920 信号読み出し回路
921 オペアンプ
922 積分容量
923 リセットスイッチ
930 ゲート駆動回路
Claims (3)
- 基板上に光電変換素子とスイッチング素子とを順次積層した構造を有するイメージセンサにおいて、
前記光電変換素子は、水素化アモルファスシリコン層を含み、
前記スイッチング素子は、アモルファス酸化物半導体層を含み、
前記水素化アモルファスシリコン層と前記アモルファス酸化物半導体層との間に、前記水素化アモルファスシリコン層から離脱する水素の透過を抑制するブロッキング層を備え、
前記ブロッキング層は、SiC、Al2O3、Y2O3、AlNの中から選択される1以上の材料で構成される膜がSiN膜で挟まれた積層構造を有している、
ことを特徴とするイメージセンサ。 - 前記イメージセンサは、前記基板の裏面又は前記スイッチング素子の上層に蛍光体を備える放射線撮影装置用イメージセンサである、
ことを特徴とする請求項1に記載のイメージセンサ。 - 基板上に光電変換素子とスイッチング素子とを有するイメージセンサの製造方法において、
前記基板上に、水素化アモルファスシリコン層を含む前記光電変換素子を形成する光電変換素子形成工程と、
前記光電変換素子の上層に、アモルファス酸化物半導体層を含む前記スイッチング素子を形成するスイッチング素子形成工程とをこの順に有し、
前記光電変換素子形成工程と前記スイッチング素子形成工程との間に、SiC、Al 2 O 3 、Y 2 O 3 、AlNの中から選択される1以上の材料で構成される膜がSiN膜で挟まれた積層構造を有し、前記水素化アモルファスシリコン層から離脱する水素の透過を抑制するブロッキング層を形成する、
ことを特徴とするイメージセンサの製造方法。
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