KR102712316B1 - HVPE법에 따른 Ga2O3 결정막 증착방법, 증착장치 및 이를 사용한 Ga2O3 결정막 증착 기판 - Google Patents
HVPE법에 따른 Ga2O3 결정막 증착방법, 증착장치 및 이를 사용한 Ga2O3 결정막 증착 기판 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 일 실시예에 HVPE법에 따른 Ga2O3 증착방법을 수행하기 위한 증착장치 및 반응과정을 나타낸 개념도이다.
도 3은 본 발명의 일 실시예에 따른 도 2의 증착장치의 라인별 기체 투입 유량을 나타낸 그래프이다.
도 4는 도 2의 증착장치에 있어서, 블록별 제어 온도를 나타낸 그래프이다.
도 5는 본문의 표1과 2의 비교예 및 실시예에 대한 표면에 대한 광학현미경의 50배, 200배, 500배 표면 사진을 나열한 표이다.
도 6a는 우회공급로로 공급한 HCl 가스의 유량과 (002) 면과 (-402)면의 반치전폭(FWHM)을 나타낸 그래프이다.
도 6b는 우회공급로로 공급한 HCl 가스의 유량과 이에 따른 성장 표면의 거칠기(Ra,Rt)를 나타낸 그래프이다.
도 7은 표면 연마 전후에 표면 관찰한 광학현미경 50배 표면 사진이다.
도 8는 중앙공급로에 과량의 HCl 가스를 투입할 때 Ga2O3 증착장치의 반응과정을 나타낸 개념도이다.
도 9a는 중앙공급로로 투입된 HCl 가스의 양과 Ga2O3의 성장 속도를 나타낸 그래프이다.
도 9b는 중앙공급로로 공급한 HCl 가스의 유량과 (002) 면과 (-402)면의 반치전폭을 나타낸 그래프이다.
도 10a는 X방향과 Y방향을 정의하기 위하여, 증착면에 X와 Y를 표시한 표면 사진이며, 10b는 X방향의 표면의 거칠기 Ra및 Rt를 중앙공급로로 공급된 HCl 가스의 유량과 비교한 그래프이고, 10c는 Y방향의 표면의 거칠기 Ra 및 Rt를 중앙공급로로 공급된 HCl 가스의 유량과 비교한 그래프이다.
도 11는 본 발명의 일 실시예에 따른 HVPE법에 따른 Ga2O3 증착방법의 일 예와 비교예를 나타낸 표이다.
| 성장조건(sccm) | 표면물성 | |||||||
| 항목 | Ga_HCl | Side_HCl | O2 | Growth Time(min) | FWHM of RC(002) (arcsec) | FWHM of RC(-402) (arcsec) | Ra(nm) | Rt(nm) |
| No.1 | 100 | 0 | 2000 | 6 | 129 | 99 | 1877.00 | 2263.00 |
| No.2 | 100 | 20 | 2000 | 90 | 89 | 38 | 254.78 | 2312.28 |
| No.3 | 100 | 40 | 2000 | 90 | 59 | 89 | 71.47 | 1113.05 |
| No.4 | 100 | 60 | 2000 | 90 | 19 | 29 | 11.42 | 203.20 |
| 연번 | 피트의 개수 | 중앙공급로:우회공급로 HCl 가스 비 | 비고 |
| No. 1 | 2.15x105/cm2 | 1:0 | 비교예 |
| No. 2 | 4.57x104/cm2 | 10:2 | 실시예 |
| No. 3 | 2.29x104/cm2 | 10:4 | 실시예 |
| No. 4 | 1.14x104/cm2 | 10:6 | 실시예 |
220: 반응부 233: 주입부
235: 증발부 237: 이송부
243: 이입부 245: 증착부
247: 방출부 301: 배경질소라인
303: 균형질소라인 305: 중앙공급질소라인
307: 중앙공급염산라인 311: 우회공급질소라인
313: 우회공급염산라인 315: 산소라인
Claims (5)
- 성장된(As grown) 상태에서 기판 표면에 발견되는 결함의 밀도가 4.57X104/cm2 이하이고,
상기 기판 표면은, (002) 및 (-402) 면의 FWHM(Full width at half maximum)의 값이 100arcsec이하이고, 표면거칠기 Ra가 254.9nm이하, Rt가 2312nm이하인 것을 특징으로 하는 Ga2O3 결정막 증착 기판. - 제1항에 있어서,
상기 기판 표면은, 100g/cm2의 압력으로 180분이하의 시간동안 표면을 CMP했을 때, 기판 표면의 결함이 모두 연마되는 것을 특징으로 하는 Ga2O3 결정막 증착 기판. - 삭제
- 제1항에 있어서,
상기 기판 표면은, 결함의 밀도가 2.29X104/cm2 이하이고, (002) 및 (-402)면의 반치전폭의 값이 90arcsec 이하이고 Ra가 71.5nm이하이고, Rt가 1150nm이하인 것을 특징으로 하는 Ga2O3 결정막 증착 기판. - 제1항에 있어서,
상기 기판 표면은, 결함의 밀도가 1.14X104/cm2 이하이고, (002) 및 (-402)면의 반치전폭의 값이 30arcsec이하이고 표면 거칠기 Ra는 11.42nm, Rt가 203.20nm이하인 것을 특징으로 하는 Ga2O3 결정막 증착 기판.
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| KR1020230075289A KR102712316B1 (ko) | 2021-12-22 | 2023-06-13 | HVPE법에 따른 Ga2O3 결정막 증착방법, 증착장치 및 이를 사용한 Ga2O3 결정막 증착 기판 |
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| KR1020210185166A KR102546042B1 (ko) | 2021-12-22 | 2021-12-22 | HVPE법에 따른 Ga2O3 결정막 증착방법, 증착장치 및 이를 사용한 Ga2O3 결정막 증착 기판 |
| KR1020230075289A KR102712316B1 (ko) | 2021-12-22 | 2023-06-13 | HVPE법에 따른 Ga2O3 결정막 증착방법, 증착장치 및 이를 사용한 Ga2O3 결정막 증착 기판 |
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| KR1020230075289A Active KR102712316B1 (ko) | 2021-12-22 | 2023-06-13 | HVPE법에 따른 Ga2O3 결정막 증착방법, 증착장치 및 이를 사용한 Ga2O3 결정막 증착 기판 |
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| KR102807472B1 (ko) | 2023-10-13 | 2025-05-15 | 동의대학교 산학협력단 | 산화갈륨 단결정 성장방법 |
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| KR102945210B1 (ko) | 2023-11-16 | 2026-03-26 | 한국세라믹기술원 | 다이아몬드 성장방법 및 이에 의해 제조된 다이아몬드 기판 |
| KR102781511B1 (ko) | 2023-11-16 | 2025-03-12 | 한국세라믹기술원 | 대면적 Ga2O3 종자결정, 이의 제조방법 및 대면적 Ga2O3 종자결정을 활용한 Ga2O3 단결정 성장방법 |
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| KR102726367B1 (ko) | 2023-12-15 | 2024-11-04 | 한국세라믹기술원 | 도핑 산화갈륨 펠릿, 이의 제조 방법 및 이를 이용하여 제조된 도핑 단결정 |
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| EP4202087A2 (en) | 2023-06-28 |
| TWI840915B (zh) | 2024-05-01 |
| KR20230095885A (ko) | 2023-06-29 |
| CN116377581A (zh) | 2023-07-04 |
| KR102546042B9 (ko) | 2023-11-13 |
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| US20230193509A1 (en) | 2023-06-22 |
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