US 11,942,578 B2
Phosphor substrate, light emitting substrate, and lighting device
Masahiro Konishi, Omuta (JP)
Assigned to DENKA COMPANY LIMITED, Tokyo (JP)
Appl. No. 17/415,433
Filed by DENKA COMPANY LIMITED, Tokyo (JP)
PCT Filed Dec. 18, 2019, PCT No. PCT/JP2019/049688
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/137761, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-244543 (JP), filed on Dec. 27, 2018.
Prior Publication US 2022/0059734 A1, Feb. 24, 2022
Int. Cl. H01L 33/50 (2010.01); H01L 25/075 (2006.01); H01L 33/00 (2010.01); H01L 33/62 (2010.01)
CPC H01L 33/505 (2013.01) [H01L 25/0753 (2013.01); H01L 33/005 (2013.01); H01L 33/62 (2013.01); H01L 2933/0041 (2013.01); H01L 2933/0066 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A phosphor substrate having at least one light emitting element mounted on one surface, the phosphor substrate comprising:
an insulating substrate;
an electrode layer disposed on one surface of the insulating substrate and bonded to the light emitting element; and
a phosphor layer which is disposed on one surface of the insulating substrate and includes a phosphor in which a light emission peak wavelength, in a case where light emitted by the light emitting element is used as excitation light, is in a visible light region,
wherein a bonded surface of a surface of the electrode layer facing an outer side in a thickness direction of the insulating substrate, the bonded surface being bonded to the light emitting element, is positioned further on the outer side in the thickness direction than a non-bonded surface which is a surface other than the bonded surface, and
at least a part of the phosphor layer is disposed around the bonded surface.