KR20170086418A - 자외선 검출소자 - Google Patents
자외선 검출소자 Download PDFInfo
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- KR20170086418A KR20170086418A KR1020170008318A KR20170008318A KR20170086418A KR 20170086418 A KR20170086418 A KR 20170086418A KR 1020170008318 A KR1020170008318 A KR 1020170008318A KR 20170008318 A KR20170008318 A KR 20170008318A KR 20170086418 A KR20170086418 A KR 20170086418A
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- 230000031700 light absorption Effects 0.000 claims abstract description 67
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 230000000903 blocking effect Effects 0.000 claims description 51
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 28
- 229910002704 AlGaN Inorganic materials 0.000 claims description 10
- 229910052594 sapphire Inorganic materials 0.000 claims description 4
- 239000010980 sapphire Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- 229910004205 SiNX Inorganic materials 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 513
- 229910002601 GaN Inorganic materials 0.000 description 27
- 239000000203 mixture Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 18
- 230000002441 reversible effect Effects 0.000 description 13
- 230000007547 defect Effects 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 150000004767 nitrides Chemical class 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000009257 reactivity Effects 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000005530 etching Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 238000000825 ultraviolet detection Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910005855 NiOx Inorganic materials 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 230000004298 light response Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
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Abstract
Description
도 2는 본 발명의 실시예에 따른 자외선 검출소자의 단면도이다.
도 3은 본 발명의 실시예에 따른 쇼트키 특성의 개선의 예를 나타낸다.
도 4는 본 발명의 다른 실시예에 따른 자외선 검출 소자의 단면도이다.
도 5는 본 발명의 일 실시예에 따른 자외선 검출소자의 에너지 밴드 다이어그램을 나타낸다.
도 6은 본 발명의 다른 실시예에 따른 자외선 검출소자의 에너지 밴드 다이어그램을 나타낸 것이다.
도 7은 본 발명의 또 다른 실시예에 따른 자외선 검출 소자의 단면도이다.
도 8은 본 발명의 또 다른 실시예에 따른 자외선 검출소자의 에너지 밴드 다이어그램을 나타낸다.
도 9는 본 발명의 또 다른 실시예에 따른 자외선 검출 소자의 단면도이다.
도 10은 본 발명의 또 다른 실시예에 따른 자외선 검출소자의 에너지 밴드 다이어그램을 나타낸다.
도 11은 본 발명의 또 다른 실시예에 따른 자외선 검출소자의 단면도이다.
도 12는 본 발명의 또 다른 실시예에 따른 에너지 밴드 다이어그램을 나타낸다.
도 13은 본 발명의 또 다른 실시예에 따른 자외선 검출 소자의 단면도이다.
도 14는 본 발명의 또 다른 실시예에 따른 자외선 검출소자의 에너지 밴드 다이어그램을 나타낸 것이다.
110; 기판
120; 버퍼층
130; 광흡수층
140; 캡핑층
150; 쇼트키층
160; 절연막층
170; 제1 전극층
180; 제2 전극층
Claims (20)
- 기판;
상기 기판 상에 위치하는 버퍼층;
상기 버퍼층 상에 위치하는 광흡수층;
상기 광흡수층 상에 위치하는 캡핑층; 및
상기 캡핑층 상의 일부 영역에 위치하는 쇼트키층을 포함하고,
상기 캡핑층은 상기 광흡수층보다 더 큰 에너지 밴드갭을 갖는 자외선 검출소자. - 청구항 1에 있어서,
상기 광흡수층은 AlxGa1 - xN(0<x<0.7)층을 포함하고,
상기 캡핑층은 상기 광흡수층보다 Al의 비율이 높은 AlGaN층을 포함하는 자외선 검출소자. - 청구항 2에 있어서,
상기 버퍼층과 상기 광흡수층 사이에 위치하는 저전류 차단층을 더 포함하고,
상기 저전류 차단층은 단일 AlGaN층 또는 Al 비율이 상이한 복수의 AlGaN층을 포함하는 자외선 검출소자. - 청구항 3에 있어서,
상기 버퍼층과 상기 저전류 차단층 사이에 위치하는 정전기 방지층을 더 포함하고,
상기 정전기 방지층은 Si가 임의 도핑되지 않은 GaN층을 포함하는 자외선 검출 소자. - 청구항 3에 있어서,
상기 광흡수층의 Al의 비율이 30% 이상인 경우,
상기 버퍼층과 저전류 차단층 사이에 위치하는 AlN층을 더 포함하는 자외선 검출소자. - 청구항 1에 있어서,
상기 광흡수층은 GaN층을 포함하고,
상기 캡핑층은 AlGaN층을 포함하는 자외선 검출소자. - 청구항 6에 있어서,
상기 버퍼층과 상기 광흡수층 사이에 위치하는 저전류 차단층을 더 포함하고,
상기 저전류 차단층은 단일 AlGaN층 또는 Al 비율이 상이한 복수의 AlGaN층을 포함하는 자외선 검출소자. - 청구항 1에 있어서,
상기 광흡수층이 InyGa1 - yN(0<y<1)층을 포함는 자외선 검출소자. - 청구항 8에 있어서,
상기 캡핑층은 GaN층 또는 AlGaN층을 포함하는 자외선 검출소자. - 청구항 8에 있어서,
상기 캡핑층은 상기 광흡수층을 덮는 제1층 및 상기 제1층상에 위치하는 제2층을 포함하고,
상기 제1층은 GaN층을 포함하고 상기 제2층은 AlGaN층을 포함하는 자외선 검출소자. - 청구항 10에 있어서,
상기 제1층 및 제2층은 각각 1nm~10nm의 두께를 갖는 자외선 검출소자. - 청구항 8에 있어서,
상기 버퍼층과 상기 광흡수층 사이에 위치하는 중간버퍼층을 더 포함하고,
상기 중간버퍼층은 복수의 InGaN층 및 GaN층을 포함하는 자외선 검출소자. - 청구항 1에 있어서,
상기 광흡수층은 0.05㎛ 내지 0.5㎛의 두께로 형성되는 것을 특징으로 하는 자외선 검출소자. - 청구항 1에 있어서,
상기 기판은 사파이어 기판, SiC 기판, GaN 기판, AlN 기판, Si 기판 중 어느 하나인 자외선 검출소자. - 청구항 1에 있어서,
상기 버퍼층은 상기 기판 상에 위치하는 제1 버퍼층, 상기 제1 버퍼층 상에 위치하는 제2 버퍼층을 포함하고,
상기 제1 버퍼층 및 제2 버퍼층은 각각 GaN층을 포함하는 자외선 검출소자. - 청구항 1에 있어서,
상기 쇼트키층은 ITO, Ni, ATO, Pt, W, Ti, Pd, Ru, Cr, Au 중의 어느 하나로 이루어지는 자외선 검출소자. - 청구항 1에 있어서,
상기 캡핑층 상에 위치하는 절연막층을 더 포함하고, 상기 절연막층은 상기 쇼트키층의 상면 및 측면을 덮는 자외선 검출소자. - 청구항 17에 있어서,
상기 절연막층은 SiNx층 및 SiOx층 중 어느 하나인 자외선 검출소자. - 청구항 1에 있어서,
상기 쇼트키층 상에 위치하는 제1 전극층을 더 포함하는 자외선 검출소자. - 청구항 19에 있어서,
상기 버퍼층 상에 위치하는 제2 전극층을 더 포함하고,
상기 제2 전극층은 상기 버퍼층과 오믹 접합하는 자외선 검출소자.
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KR20240079969A (ko) * | 2022-11-29 | 2024-06-05 | (주)제니컴 | AlGaN/GaN 또는 AlGaN/AlGaN층의 이종접합층을 포함하는 고감도의 자외선을 감지하는 반도체 소자 |
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