Light-emitting device and method of manufacturing the same
A light-emitting device includes a light-emitting element having an upper surface serving as a light-extracting surface, a first light-transmissive member bonded to the upper surface of the light-emitting element and including an inorganic material as a main component and a wavelength conversion member, and a second light-transmissive member bonded to an upper surface of the first light-transmissive member and including an inorganic material as a main component. A periphery of a lower surface of the first light-transmissive member is located outward of a periphery of the upper surface of the light-emitting element in a plan view. A periphery of an upper surface of the second light-transmissive member is located inward of a periphery of the upper surface of the first light-transmissive member in the plan view.
1. A light-emitting device comprising:
a light-emitting element having an upper surface serving as a light-extracting surface;
a first light-transmissive member bonded to the upper surface of the light-emitting element and comprising:
an inorganic material as a main component, and
a wavelength conversion member; and
a second light-transmissive member bonded to an upper surface of the first light-transmissive member and comprising an inorganic material as a main component,
wherein a periphery of a lower surface of the first light-transmissive member is located outward of a periphery of the upper surface of the light-emitting element in a plan view,
wherein a periphery of an upper surface of the second light-transmissive member is located inward of a periphery of the upper surface of the first light-transmissive member in the plan view, and
wherein an area of the upper surface of the second light-transmissive member is smaller than an area of the upper surface of the light-emitting element.
2. The light-emitting device according to claim 1 , wherein the first light-transmissive member and the second light-transmissive member is made of borosilicate glass, sapphire glass, or quartz glass.
3. The light-emitting device according to claim 1 , wherein the first light-transmissive member and the second light-transmissive member are directly bonded together.
4. The light-emitting device according to claim 1 , wherein the first light-transmissive member and the light-emitting element are bonded together via an adhesive member.
5. The light-emitting device according to claim 1 , the light-emitting device further comprising a light-reflective member covering lateral surfaces of the light-emitting element, lateral surfaces of the first light-transmissive member, and lateral surfaces of the second light-transmissive member.
6. The light-emitting device according to claim 1 , wherein the second light-transmissive member has a larger thickness than a thickness of the first light-transmissive member.
7. The light-emitting device according to claim 1 , wherein the first light-transmissive member contains a light-diffusing material.
8. The light-emitting device according to claim 1 , wherein the second light-transmissive member has a thickness of about 30 μm to 270 μm.
9. The light-emitting device according to claim 1 , wherein a planar shape of the second light-transmissive member is a polygonal shape with a rounded corner.
10. A light-emitting device comprising:
a plurality of light-emitting elements each having an upper surface serving as a light-extracting surface;
a first light-transmissive member bonded to the upper surfaces of the plurality of light-emitting elements and comprising:
an inorganic material as a main component, and
a wavelength conversion member; and
a second light-transmissive member bonded to an upper surface of the first light-transmissive member and comprising an inorganic material as a main component,
wherein a periphery of a lower surface of the first light-transmissive member is located outward of a periphery of the upper surfaces of the plurality of light-emitting elements in a plan view,
wherein a periphery of a lower surface and a periphery of an upper surface of the second light-transmissive member are located inward of a periphery of the upper surface of the first light-transmissive member in the plan view, and
wherein an area of the upper surface of the second light-transmissive member is smaller than an area of the upper surfaces of the plurality of light-emitting elements.
11. The light-emitting device according to claim 10 , wherein the plurality of light-emitting elements form a substantially rectangular shape as a whole in the plan view.
12. The light-emitting device according to claim 10 , wherein a planar shape of the second light-transmissive member is a polygonal shape with a rounded corner.
13. A method of manufacturing a light-emitting device, the method comprising:
providing a light-transmissive member in which an upper surface of a first light-transmissive member comprising an inorganic material as a main component and a wavelength conversion member is directly bonded to lower surfaces of a plurality of second light-transmissive members each comprising an inorganic material as a main component; and
bonding a lower surface of the first light-transmissive member in the light-transmissive member to an upper surface of a light-emitting element such that a periphery of the lower surface of the first light-transmissive member is located outward of a periphery of the upper surface of the light-emitting element,
wherein the direct bonding is performed by surface-activated bonding, atomic diffusion bonding, or hydroxy-group bonding.
14. The method of manufacturing a light-emitting device according to claim 13 , the method further comprising mounting the light-emitting element on a substrate.
15. The method of manufacturing a light-emitting device according to claim 13 , the method further comprising disposing a light-reflective member to cover lateral surfaces of the second light-transmissive members, lateral surfaces of the first light-transmissive member, and lateral surfaces of the light-emitting element.
16. The method of manufacturing a light-emitting device according to claim 13 , wherein the first light-transmissive member and the second light-transmissive members comprise borosilicate glass, sapphire glass, or quartz glass.
17. A light-emitting device comprising:
a light-emitting element having an upper surface serving as a light-extracting surface;
a first light-transmissive member bonded to the upper surface of the light-emitting element and comprising:
an inorganic material as a main component, and
a wavelength conversion member; and
a second light-transmissive member bonded to an upper surface of the first light-transmissive member and comprising an inorganic material as a main component,
wherein a periphery of a lower surface of the first light-transmissive member is located outward of a periphery of the upper surface of the light-emitting element in a plan view,
wherein a periphery of an upper surface of the second light-transmissive member is located inward of a periphery of the upper surface of the first light-transmissive member in the plan view, and
wherein the first light-transmissive member and the light-emitting element are bonded together via an adhesive member.
18. The light-emitting device according to claim 17 , wherein an area of the upper surface of the second light-transmissive member is smaller than an area of the upper surface of the light-emitting element.
19. The light-emitting device according to claim 17 , wherein the first light-transmissive member and the second light-transmissive member is made of borosilicate glass, sapphire glass, or quartz glass.
20. The light-emitting device according to claim 17 , wherein the first light-transmissive member and the second light-transmissive member are directly bonded together.
21. The light-emitting device according to claim 17 , the light-emitting device further comprising a light-reflective member covering lateral surfaces of the light-emitting element, lateral surfaces of the first light-transmissive member, and lateral surfaces of the second light-transmissive member.
22. The light-emitting device according to claim 17 , wherein the second light-transmissive member has a larger thickness than a thickness of the first light-transmissive member.
23. The light-emitting device according to claim 17 , wherein the first light-transmissive member contains a light-diffusing material.
24. The light-emitting device according to claim 17 , wherein the second light-transmissive member has a thickness of about 30 μm to 270 μm.
25. The light-emitting device according to claim 17 , wherein a planar shape of the second light-transmissive member is a polygonal shape with a rounded corner.
26. A light-emitting device comprising:
a light-emitting element having an upper surface serving as a light-extracting surface;
a first light-transmissive member bonded to the upper surface of the light-emitting element and comprising:
an inorganic material as a main component, and
a wavelength conversion member; and
a second light-transmissive member bonded to an upper surface of the first light-transmissive member and comprising an inorganic material as a main component,
wherein a periphery of a lower surface of the first light-transmissive member is located outward of a periphery of the upper surface of the light-emitting element in a plan view,
wherein a periphery of an upper surface of the second light-transmissive member is located inward of a periphery of the upper surface of the first light-transmissive member in the plan view, and
wherein the second light-transmissive member has a thickness of about 30 μm to 270 μm.
27. The light-emitting device according to claim 26 , wherein an area of the upper surface of the second light-transmissive member is smaller than an area of the upper surface of the light-emitting element.
28. The light-emitting device according to claim 26 , wherein the first light-transmissive member and the second light-transmissive member is made of borosilicate glass, sapphire glass, or quartz glass.
29. The light-emitting device according to claim 26 , wherein the first light-transmissive member and the second light-transmissive member are directly bonded together.
30. The light-emitting device according to claim 26 , wherein the first light-transmissive member and the light-emitting element are bonded together via an adhesive member.
31. The light-emitting device according to claim 26 , the light-emitting device further comprising a light-reflective member covering lateral surfaces of the light-emitting element, lateral surfaces of the first light-transmissive member, and lateral surfaces of the second light-transmissive member.
32. The light-emitting device according to claim 26 , wherein the second light-transmissive member has a larger thickness than a thickness of the first light-transmissive member.
33. The light-emitting device according to claim 26 , wherein the first light-transmissive member contains a light-diffusing material.
34. The light-emitting device according to claim 26 , wherein a planar shape of the second light-transmissive member is a polygonal shape with a rounded corner.