KR102553985B1 - Ⅲ족 질화물 반도체 - Google Patents
Ⅲ족 질화물 반도체 Download PDFInfo
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- KR102553985B1 KR102553985B1 KR1020197014250A KR20197014250A KR102553985B1 KR 102553985 B1 KR102553985 B1 KR 102553985B1 KR 1020197014250 A KR1020197014250 A KR 1020197014250A KR 20197014250 A KR20197014250 A KR 20197014250A KR 102553985 B1 KR102553985 B1 KR 102553985B1
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 46
- 150000004767 nitrides Chemical class 0.000 title claims abstract description 42
- 239000010410 layer Substances 0.000 claims abstract description 316
- 229910002704 AlGaN Inorganic materials 0.000 claims abstract description 68
- 239000002346 layers by function Substances 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims description 93
- 239000002019 doping agent Substances 0.000 claims description 28
- 239000013078 crystal Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 230000007423 decrease Effects 0.000 claims description 13
- 229910052738 indium Inorganic materials 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910052733 gallium Inorganic materials 0.000 claims description 6
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 4
- 150000002602 lanthanoids Chemical class 0.000 claims description 4
- 229910052706 scandium Inorganic materials 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 description 106
- 238000009792 diffusion process Methods 0.000 description 24
- 239000012535 impurity Substances 0.000 description 16
- 230000007547 defect Effects 0.000 description 15
- 125000004429 atom Chemical group 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 9
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 7
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 7
- IBEFSUTVZWZJEL-UHFFFAOYSA-N trimethylindium Chemical compound C[In](C)C IBEFSUTVZWZJEL-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 239000012159 carrier gas Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 229910052594 sapphire Inorganic materials 0.000 description 4
- 239000010980 sapphire Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical group [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- QHGSGZLLHBKSAH-UHFFFAOYSA-N hydridosilicon Chemical compound [SiH] QHGSGZLLHBKSAH-UHFFFAOYSA-N 0.000 description 2
- 150000002500 ions Chemical group 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052716 thallium Inorganic materials 0.000 description 2
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 2
- 230000005533 two-dimensional electron gas Effects 0.000 description 2
- MHYQBXJRURFKIN-UHFFFAOYSA-N C1(C=CC=C1)[Mg] Chemical compound C1(C=CC=C1)[Mg] MHYQBXJRURFKIN-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 108091006149 Electron carriers Proteins 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 206010039729 Scotoma Diseases 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002248 hydride vapour-phase epitaxy Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000927 vapour-phase epitaxy Methods 0.000 description 1
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Abstract
AlxGa1-xN(0≤x<1)으로 구성되는 n-GaN층과, 상기 n-GaN층 상에 배치된, InGaN으로 구성되는 InGaN층과, 상기 InGaN층 상에 배치된, n형의 AlyGa1-yN(0≤y<1)으로 구성되는 n-AlGaN층과, 상기 n-AlGaN층 상에 배치된, 기능층을 구비하고, 상기 n-GaN층의 Mg 농도는, 상기 n-AlGaN층의 Mg 농도보다 큰 Ⅲ족 질화물 반도체.
Description
도 2는 본 개시의 실시형태 2에 있어서의 Ⅲ족 질화물 반도체를 포함하는 소자 구조와, 특정 층의 불순물의 농도 프로파일을 나타내는 도면이다.
도 3은 본 개시의 실시형태 1에 있어서의, n-InGaN층의 Mg 확산 억제 효과를 나타내는 Mg 농도 프로파일의 도면이다.
도 4는 본 개시의 실시형태 1의 Ⅲ족 질화물 반도체 내에 있어서의, Mg의 확산성을 나타내는 Mg 농도 프로파일의 도면이다.
도 5는 본 개시의 실시형태 1에 있어서의, 2차 이온 질량 분석법(Secondary ION Mass Spectrometry : SIMS)에 의한 Ⅲ족 질화물 반도체 발광 소자의 불순물 농도 및 구성 원소(In)의 2차 이온 강도의 깊이 프로파일을 나타내는 도면이다.
도 6은 본 개시의 실시형태 3에 있어서의 Ⅲ족 질화물 반도체를 포함하는 소자 구조와, Mg 농도 프로파일의 도면이다.
2, 32, 42, 51 : n-GaN층
3, 33, 52 : n-InGaN층
4, 34 : n-AlGaN층
5, 53 : InGaN 발광층
6, 54 : p-AlGaN층
10, 20 : Ⅲ족 질화물 반도체
62 : GaN 제 1 버퍼층
63 : InGaN 확산 억제층
64 : GaN 제 2 버퍼층
65 : AlGaN 백 배리어층
66 : GaN 채널층
67 : AlGaN 배리어층
68 : p형 GaN층
100, 200 : 발광 다이오드
601 : 소스 전극
602 : 게이트 전극
603 : 드레인 전극
Claims (10)
- AlxGa1-xN(0≤x<1)으로 구성되는 GaN층과,
상기 GaN층 상에 배치된, InGaN으로 구성되는 InGaN층과,
상기 InGaN층 상에 배치된, 도펀트를 포함하는 AlyGa1-yN(0≤y<1)으로 구성되는 AlGaN층과,
상기 AlGaN층 상에 배치된 기능층
을 구비하고,
상기 GaN층의 Mg 농도는, 상기 AlGaN층의 Mg 농도보다 크고,
상기 AlGaN층의 도펀트 농도가, 상기 AlGaN층의 Mg 농도보다 크며,
상기 GaN층은, 도펀트를 포함하고, 그러면서 또
상기 InGaN층 측에, 도펀트 농도가 Mg 농도보다 큰 제1 영역과,
상기 제1 영역과 반대측에, 도펀트 농도가 Mg 농도보다 작은 제2 영역을 가지는
Ⅲ족 질화물 반도체.
- 삭제
- 제1항에 있어서,
상기 GaN층의 상기 제2 영역의 Mg 농도는, 1×1019㎝-3 이상이면서 또 1×1022㎝-3 이하인 Ⅲ족 질화물 반도체.
- 제1항에 있어서,
상기 GaN층의 상기 제2 영역의 두께는, 0.5㎛ 이상이면서 또 2㎛ 이하인 Ⅲ족 질화물 반도체.
- 제1항에 있어서,
상기 GaN층은, 기판 상에 배치되고,
상기 기판은, 일반식 RAMgO4로 표시되는 단결정체(일반식에 있어서, R은, Sc, In, Y, 및 란타노이드계 원소로 되어 있는 군으로부터 선택되는 하나 또는 복수의 3가 원소를 나타내고, A는, Fe(Ⅲ), Ga, 및 Al로 되어 있는 군으로부터 선택되는 하나 또는 복수의 3가 원소를 나타낸다)로 되어 있는 RAMgO4 기판인
Ⅲ족 질화물 반도체.
- 제1항에 있어서,
상기 InGaN층에 있어서의 두께 방향의 Mg 농도의 감소율은, 상기 GaN층에 있어서의 두께 방향의 Mg 농도의 감소율보다 큰 Ⅲ족 질화물 반도체.
- 제1항에 있어서,
상기 AlGaN층에 포함되는 상기 도펀트는 n형 도펀트인 Ⅲ족 질화물 반도체.
- 제7항에 있어서,
상기 n형 도펀트는, Si인 Ⅲ족 질화물 반도체.
- 제1항 및 제3항 내지 제8항 중 어느 한 항에 있어서,
상기 기능층은, 발광층인 Ⅲ족 질화물 반도체.
- 제1항 및 제3항 내지 제8항 중 어느 한 항에 있어서,
상기 기능층은, 채널층인 Ⅲ족 질화물 반도체.
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