KR20200144142A - 광 파장 변환 부재 및 광 파장 변환 장치 그리고 발광 장치 - Google Patents
광 파장 변환 부재 및 광 파장 변환 장치 그리고 발광 장치 Download PDFInfo
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Abstract
Description
도 2 는 제 1 실시형태의 광 파장 변환 부재를 두께 방향으로 파단한 단면도이다.
도 3 은 제 1 실시형태의 광 파장 변환 부재의 제조 공정을 나타내는 설명도이다.
도 4 는 제 2 실시형태의 광 파장 변환 부재를 두께 방향으로 파단한 단면도이다.
도 5 는 제 3 실시형태의 광 파장 변환 부재를 두께 방향으로 파단한 단면도이다.
도 6 은 제 4 실시형태의 광 파장 변환 부재를 두께 방향으로 파단한 단면도이다.
도 7 은 제 5 실시형태의 광 파장 변환 부재를 두께 방향으로 파단한 단면도이다.
도 8 은 제 6 실시형태의 광 파장 변환 장치를 두께 방향으로 파단한 단면도이다.
도 9 는 제 8 실시형태의 발광 장치를 나타내는 설명도이다.
3…세라믹스 소결체
7…금속층
5…유전체 다층막
5a…고굴절률막
5b…저굴절률막
23…Ni 층
43…Au 층
51…광 파장 변환 장치
61…발광 장치
63…발광 소자
Claims (10)
- 입사된 광에 의해 형광을 발하는 형광성을 갖는 결정 입자를 주체로 하는 형광상과,
투광성을 갖는 결정 입자를 주체로 하는 투광상을 갖는 세라믹스 소결체를 구비한 광 파장 변환 부재에 있어서,
상기 세라믹스 소결체의 상기 광이 입사되는 측과는 반대측에 광을 반사시키는 반사성을 갖는 금속층을 가짐과 함께,
상기 세라믹스 소결체와 상기 금속층의 사이에 광의 굴절률이 상이한 유전체의 층을 갖는 유전체 다층막을 구비한, 광 파장 변환 부재. - 제 1 항에 있어서,
상기 형광상의 결정 입자는, 화학식 A3B5O12 : Ce 로 나타내는 조성을 가짐과 함께, 상기 A 원소 및 상기 B 원소는, 각각 하기 원소군에서 선택되는 적어도 1 종의 원소로 구성되어 있는, 광 파장 변환 부재.
A : Sc, Y, Ce 를 제외한 란타노이드
B : Al, Ga - 제 1 항 또는 제 2 항에 있어서,
상기 투광상의 결정 입자는, Al2O3 의 조성을 갖는, 광 파장 변환 부재. - 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,
상기 금속층의 성분으로서 Ag 및/또는 Al 을 포함하는, 광 파장 변환 부재. - 제 4 항에 있어서,
추가로, 상기 금속층의 상기 광의 입사측과는 반대측에 Ni 층 및/또는 Au 층을 구비한, 광 파장 변환 부재. - 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,
상기 유전체 다층막은, 파장 550 ㎚ 의 상기 광이 입사되었을 때의 굴절률 (a) 의 고굴절률막과, 상기 고굴절률막보다 파장 550 ㎚ 의 상기 광이 입사되었을 때의 굴절률이 낮은 굴절률 (b) 의 저굴절률막을 교대로 적층한 막으로, 상기 굴절률 (a) 과 상기 굴절률 (b) 의 관계가 1.3<a/b 이며,
또한, 상기 세라믹스 소결체에 파장 550 ㎚ 의 상기 광이 입사되었을 때의 굴절률 (c) 과 상기 굴절률 (a) 의 관계가 1<a/c 인, 광 파장 변환 부재. - 제 6 항에 있어서,
상기 고굴절률막은, Ti, Zr, Hf, Ta, Nb 에서 선택되는 적어도 1 종의 원소를 포함하고, 상기 저굴절률막은, SiO2 또는 MgF2 로 이루어지는, 광 파장 변환 부재. - 제 1 항 내지 제 7 항 중 어느 한 항에 있어서,
상기 유전체 다층막의 총두께가 300 ㎚ 이하인, 광 파장 변환 부재. - 상기 제 1 항 내지 제 8 항 중 어느 한 항에 기재된 광 파장 변환 부재를 구비하고,
상기 광 파장 변환 부재의 상기 금속층의 상기 광의 입사측과는 반대측에 방열 부재가 접합된, 광 파장 변환 장치. - 상기 제 9 항에 기재된 광 파장 변환 장치와, 상기 광을 발광하는 발광 소자를 구비한, 발광 장치.
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