Chip-on-heatsink light emitting diode package and fabrication method
View Patent ↗The present disclosure provides a novel light-emitting diode package and corresponding fabrication method for making such a package. The novel LED package comprises a resin carrier layer having a first and second surface. Embedded in the resin carrier layer are at least one electrical conductor and at least one LED. The embedded LED comprises a substrate having a bottom surface that is substantially exposed at the second surface of the resin carrier layer. The embedded LED further comprises a light emitting layer that is substantially exposed at the first surface of the resin carrier layer.
1. A light-emitting diode package, comprising:
a resin carrier layer having a first surface and a second surface;
at least one electrical conductor embedded in the resin carrier layer;
at least one light-emitting diode embedded in the resin carrier layer, the light-emitting diode further comprising:
a substrate having a bottom surface that is substantially exposed at the second surface of the resin carrier layer, and
a light emitting layer having a top surface that is substantially exposed at the first surface of the resin carrier layer.
2. The light-emitting diode package of claim 1 , wherein a bottom surface of the at least one embedded electrical conductor is exposed at the second surface of the resin carrier layer and a top surface of the at least one embedded electrical conductor is exposed at the first surface of the resin carrier layer.
3. The light-emitting diode package of claim 2 , wherein the second surface of the resin carrier layer further comprises a plurality of metal pads formed on the second surface of the resin carrier layer and wherein at least one of the plurality of metal pads is an electrical contact directly connected to the bottom surface of the at least one embedded electrical conductor and at least one of the plurality of metal pads is a thermal contact that is directly connected to the bottom surface of the substrate.
4. The light-emitting diode package of claim 1 , further comprising:
an electrostatic discharge (ESD) protection diode embedded in the resin carrier layer; and
a redistribution layer formed on the first surface of the resin carrier layer and electrically connecting the at least one light-emitting diode, the ESD protection diode, and the at least one electrical conductor, wherein the redistribution layer comprises a plurality of metal interconnects.
5. The light-emitting diode package of claim 1 , wherein the resin carrier layer comprises an epoxy molding compound.
6. The light-emitting diode package of claim 1 , wherein the electrical conductor comprises a metal or a semiconductor.
7. The light-emitting diode package of claim 1 , wherein the substrate is substantially planar with the first surface of the resin carrier layer.
8. The light-emitting diode package of claim 7 , wherein a thickness of the substrate is substantially similar to a thickness of the resin carrier layer.
9. The light-emitting diode package of claim 1 , wherein at least fifty percent of the substrate is embedded within the resin carrier layer.
10. The light-emitting diode package of claim 1 , wherein at least fifty percent of sidewalls of the light-emitting diode are embedded in the resin carrier layer.
11. The light-emitting diode package of claim 1 , wherein the first surface of the resin carrier layer further comprises a phosphor coating formed on the top surface of the at least one light-emitting layer.
12. The light-emitting diode package of claim 1 , wherein the first surface of the resin carrier layer further comprises a silicone encapsulant on the top surface of the at least one light-emitting layer.