Ceramic-based light emitting diode (LED) devices, components, and methods
View Patent ↗A light emitter device component containing one or more light emitter devices, such as light emitting diodes (LEDs) or LED chips, can include a body that can be ceramic and have a top surface, one or more light emitting devices mounted directly or indirectly on the top surface, and one or more electrical components mounted on the top surface and electrically coupled to the one or more light emitting devices. At least a portion of the top surface of the body to which the light emitting devices are mounted can be modified to have a reduced porosity compared to an as-fired ceramic body. Such components can result in improved adhesion strength and thermal management of the light emitting devices.
1. A light emitter device component comprising:
a substrate comprising a ceramic material layer having a porosity of greater than 0% but less than approximately 15%, the porosity of the substrate being configured to produce a total reflection of visible light of greater than 95%, wherein a top surface of the ceramic material layer is disposed along a single plane, at least a portion of the top surface of the ceramic material layer having been modified by lapping, polishing, and/or another mechanical modification to have a reduced porosity compared to an as-fired ceramic body;
one or more light emitter devices mounted on the portion of the top surface; and
one or more electrical components mounted on the portion of the top surface by one or more non-metallic adhesive layers and electrically coupled to the one or more light emitter devices.
2. The light emitter device component according to claim 1 , wherein the substrate comprises a thick-film ceramic substrate.
3. The light emitter device component according to claim 1 , wherein the substrate comprises a thin-film ceramic substrate.
4. The light emitter device component according to claim 1 , wherein the portion of the top surface has a reduced porosity, and a remainder of the top surface has an unmodified porosity.
5. The light emitter device component according to claim 4 , wherein the portion of the top surface has a porosity that is approximately equal to or less than approximately half of a porosity of the remainder of the top surface.
6. The light emitter device component according to claim 1 , wherein substantially all of the top surface has a reduced porosity compared to an as-fired ceramic body.
7. The light emitter device component according to claim 1 , wherein the substrate comprises a bottom surface opposing the top surface, at least a portion of the bottom surface having a reduced porosity compared to an as-fired ceramic body.
8. A method of forming a light emitter device component having increased brightness, the method comprising:
mechanically modifying at least a portion of a top surface of a substrate comprising a ceramic material layer having a porosity of greater than 0% but less than approximately 15%, the top surface of the substrate being disposed along a single plane, the porosity of the substrate being configured to produce a total reflection of visible light of greater than 95%, wherein mechanically modifying at least a portion of the substrate comprises lapping, polishing, and/or another mechanical modification such that the top surface of the ceramic material layer has a reduced porosity compared to an as-fired ceramic body;
mounting one or more light emitter devices on the portion of the top surface that is modified;
providing one or more non-metallic adhesive layers on the top surface of the substrate; and
mounting one or more electrical components to the one or more non-metallic adhesive layers.
9. The method of claim 8 , wherein the ceramic material layer comprises a thick-film ceramic material layer.
10. The method of claim 8 , wherein the ceramic material layer comprises a thin-film ceramic material layer.
11. The method of claim 8 , comprising modifying substantially all of the top surface of the ceramic material layer to have a reduced porosity compared to an as-fired ceramic body.
12. The method of claim 8 , comprising modifying at least a portion of a bottom surface opposing the top surface of the ceramic material layer to have a reduced porosity compared to an as-fired ceramic body.
13. The method of claim 8 , wherein the one or more electrical components are spaced from the substrate by the one or more non-metallic layers.