KR100279737B1 - 전계방출소자와 광소자로 구성된 단파장 광전소자 및 그의 제작방법 - Google Patents
전계방출소자와 광소자로 구성된 단파장 광전소자 및 그의 제작방법 Download PDFInfo
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Abstract
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Claims (14)
- 광소자와 전계방출 소자 어레이의 접합으로 구성되어 자외선 파장과 그 이하의 단파장 광을 방출하는 초소형 표면방출 광전소자에 있어서, 광전소자 기판의 표면상에 차례로 적층시킨 완충층, 광도파층, 양자 우물층, 및 브레그 회절 초격자층;상기 기판의 이면에 차례로 형성한 절연막, 2차 집속전극, 고전압, 절연막 및 2차 가속전극;상기 기판의 이면에 상기 절연막, 2차 집속전극, 고전압 절연막, 2차 가속전극 및 기판을 소정의 면적으로 제거하여 형성시킨 비아홀;상기 비아홀의 저면에 형성시킨 광 반사막;상기 기판상측에 메사구조로 식각된 브레그 회절 초격자, 양자 우물층, 광도파층의 표면에 형성시킨 양 전극 금속막의 광전소자;전계방출 소자 기판상에 형성시킨 복수개의 음극탐침;상기 음극탐침을 소정의 공간을 두고 둘러싸도록 벌집형으로 이루어진 개구를 형성하여 기판상에 차례로 형성한 기판상의 절연막, 그리드 금속전극, 절연막, 1차 가속전극, 고전압 절연막, 1차 집속전극의 전계 방출 소자 어레이; 및 상기 광소자와 전계방출 소자 어레이의 지지기둥에 의해 소정의 간격으로 격리하여 합착시킨 초소형 표면방출구조로 이루어진 것을 특징으로 하는 단파장 광전소자.
- 광소자와 전계방출 소자 어레이의 접합으로 구성되어 자외선 파장과 그 이하의 단파장 광을 방출하는 광전소자의 제조방법에 있어서, 광전소자 기판상에 초격자 완충층, 광도파층, 양자우물층, 브레그 회절 초격자층을 차례로 증착하는 공정;상기 기판의 이면상에 1차 절연막, 1차 금속막, 2차 절연막, 2차 금속막을 차례로 적층하고, 상기 2차 금속막상에 마스크 패턴을 형성한 후 노출된 2차 금속막으로부터 기판을 차례로 식각하여 상기 기판의 상표면상에 형성된 초격자 완충층의 표면을 노출시키는 비아홀을 형성하는 공정;상기 비아홀의 저면에 광반사막을 형성하는 공정;상기 기판의 상표면상의 브레그 회절 초격자층, 양자우물층, 광도파층을 메사구조를 가지도록 식각하고, 그 표면상에 양전극 금속막을 증착하여 광소자를 제조하는 공정;전계방출 소자 기판상에 절연막, 1차 금속막, 절연막, 2차 금속막, 고전압 절연막 및 3차 금속막을 차례로 적층하는 공정;상기 1차 내지 3차 금속막과 절연막을 감광막 패턴을 이용하여 상부로부터 차례로 식각하여 상기 기판의 표면을 노출시키는 개구를 형성하는 것에 의해 기판상에 그리드 금속, 1차 가속전극 및 1차 집속전극을 형성하는 공정;상기 노출된 기판상에 음극용 탐침을 형성하는 것에 의해 전계방출 소자 어레이를 제조하는 공정;상기 광소자와 전계방출 소자 어레이를 지지기둥을 이용하여 소정의 간격으로 유지시켜 합착하는 공정으로 이루어지는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 음극탐침, 1차 가속전극, 2차 가속전극 형성용 금속은 고융점 금속으로 형성되는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 완충층은 400℃ 내지 800℃의 저온에서 (SiC)x(GaN)1-x나 (AIN)x(GaN)1-x와 같은 초격자의 형태로 성장하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 광도파층, 양자 우물층 및 브레그 회절 초격자층은 (SiC)x(GaN)1-x나 (AIN)x(GaN)1-x으로 형성하고, 전류의 흐름을 원활히 하기 위해 n-형 또는 p-형의 불순물로 Ⅱ 또는 Ⅵ계인 Zn, Mg, Be, S, Se, Te 등을 성장과 동시에 주입하여 형성하는 것을 특징으로 하는 광전소자의 제조방법.
- 제5항에 있어서, 상기 광도파층과 양자우물층은 (SiC)x(GaN)1-x나 (AIN)x(GaN)1-x의 분몰인 x를 조절하는 것에 의해 형성하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 1차 가속전극 및 2차 가속전극은 몰리브데늄(Mo)이나 탄탈륨(Ta), 텅스텐(W)과 같이 고융점을 갖는 금속을 약 0.4미크론(micron)의 두께로 전자빔(e-beam)이나 스퍼터(sputter) 법으로 형성하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 절연막은 SiH4, O2, NH3의 혼합기체를 고주파 또는 ECR 플라즈마에서 증착하는 플라즈마화학증착법을 이용하여 산화실리콘막이나 질화실리콘막 같은 절연체를 약 300℃ 내지 500℃에서 1미크론의 두께로 증착하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 고전압 절연막은 알루미나(Al2O3)를 0.2-0.4미크론의 두께로 형성하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 절연막, 고전압 절연막 및 1차 내지 3차 금속전극은 CF4, CCl2F2,Cl2등의 아르곤 가스를 포함하는 반응성 가스를 사용하여 물리적인 식각의 정도를 높이기 위해 플라즈마 포텐셜(plsma potential)에 의해 가해지는 이온 가속전압을 200V 이상이 되도록 조절하고, 상기 식각 공정 후 산소 플라즈마로 잔류하는 탄소성분의 제거를 위해 산소 플라즈마를 100-1000mtorr의 압력에서 50W 내지 100W의 고주파 전력을 사용하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 메사구조를 형성하는 식각 공정은 반응성이온식각(recative ion etching)과 이온빔 식각(ion beam etching)법을 이용하여 수행하는 제1부공정;상기 이온빔 식각시 기판과 이온빔의 사이각을 30℃ 내지 70℃ 각을 이루도록 식각하여 메사 구조를 만들어 레이저가 나올 수 있는 창(window) 모양을 만드는 제2부공정을 포함하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 전계 방출소자 기판은 실리콘웨이퍼, 사파이어, 갈륨비소 또는 금속막 등의 전기 전도도와 열전도도가 우수한 물질을 사용하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 음극용 탐침을 형성하는 공정은 텅스텐(W), 몰리브데늄(Mo) 또는 탄탈륨(Ta)을 전자선으로 증착하여 전계방출용 금속탐침을 원추형으로 형성하는 제1부공정;상기 전계방출의 효율을 높이는 방법으로 음극탐침의 상부를 날카롭고 균일하게 하기 위해 샘플을 경사지게 한 상태에서 회전시키면서 금속막을 증착시키는 제2부공정; 및 상기 금속탐침의 반경을 20nm이하로 조절하여 게이트의 직경을 약 1.5미크론으로 하는 제3부공정을 포함하는 것을 특징으로 하는 광전소자의 제조방법.
- 제2항에 있어서, 상기 광소자와 전계방출 어레이를 합착하는 공정은 실리케이트(silicate) 접합재를 이용하고, 10-7torr 이하의 고진공을 유지하는 상태에서 실링하는 제1부공정; 고진공상태에서 실링(sealing)하기 전에 200℃ 내지 400℃ 사이의 온도로 가열하여 30분 이상 유지함으로써 추후 일어나는 가상리크(virtual leak)를 최소한으로 줄이는 제2부공정; 및 상기 지지기둥의 높이는 1차 가속전극 2차 가속전극의 사이에 수KV의 전압을 가할 수 있도록 간격을 조절하는 제3부공정을 포함하는 것을 특징으로 하는 광전소자의 제조방법.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019970070316A KR100279737B1 (ko) | 1997-12-19 | 1997-12-19 | 전계방출소자와 광소자로 구성된 단파장 광전소자 및 그의 제작방법 |
| US09/129,880 US6139760A (en) | 1997-12-19 | 1998-08-06 | Short-wavelength optoelectronic device including field emission device and its fabricating method |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019970070316A KR100279737B1 (ko) | 1997-12-19 | 1997-12-19 | 전계방출소자와 광소자로 구성된 단파장 광전소자 및 그의 제작방법 |
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| Publication Number | Publication Date |
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| KR19990051077A KR19990051077A (ko) | 1999-07-05 |
| KR100279737B1 true KR100279737B1 (ko) | 2001-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019970070316A Expired - Fee Related KR100279737B1 (ko) | 1997-12-19 | 1997-12-19 | 전계방출소자와 광소자로 구성된 단파장 광전소자 및 그의 제작방법 |
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| KR (1) | KR100279737B1 (ko) |
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-
1997
- 1997-12-19 KR KR1019970070316A patent/KR100279737B1/ko not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| US6139760A (en) | 2000-10-31 |
| KR19990051077A (ko) | 1999-07-05 |
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