LED package and fabricating method thereof
View Patent ↗The invention provides an LED package capable of effectively releasing heat emitted from an LED chip out of the package and a fabrication method thereof. For this purpose, at least one groove is formed on an underside surface of the substrate to package the LED chip and the groove is filled with carbon nanotube material. In the LED package, a substrate having at least one groove on the underside surface is prepared. A plurality of electrodes are formed on a top surface of the substrate. Also, at least the one LED chip is mounted over the substrate to have both terminals electrically connected to the upper electrodes. In addition, carbon nanotube filler is filled in the groove of the substrate.
1. A light emitting diode package comprising:
a substrate having at least one groove formed on an underside surface thereof;
a plurality of upper electrodes formed on a top surface of the substrate;
at least one light emitting diode chip mounted over the substrate, the light emitting diode chip having both terminals electrically connected to the upper electrodes; and
a carbon nanotube filler filled in the groove of the substrate.
2. The light emitting diode package according to claim 1 , wherein the substrate includes at least one via hole formed underneath the upper electrodes to perforate the top and underside surfaces thereof, the via hole be filled with a conductive filler.
3. The light emitting diode package according to claim 2 , further comprising a plurality of lower electrodes formed on the underside surface of the substrate to electrically connect to a conductive filler filled in the via hole.
4. The light emitting diode package according to claim 2 , further comprising an insulating film formed on the top and underside surfaces of the substrate, and inner walls of the groove and the via hole.
5. The light emitting diode package according to claim 4 , wherein the insulating film comprises SiO 2 .
6. The light emitting diode package according to claim 1 , further comprising a reflecting structure formed around the light emitting diode chip mounted over the substrate, the reflecting structure having an inclined surface for reflecting light emitted from the light emitting diode chip upwards.
7. The light emitting diode package according to claim 6 , further comprising a lens attached to the reflecting structure over the light emitting diode, the lens controlling a direction of light emitted from the light emitting diode.
8. The light emitting diode package according to claim 1 , wherein the groove comprises a plurality of holes extending from the underside surface of the substrate toward the top surface of the substrate without perforating the substrate.
9. The light emitting diode package according to claim 1 , wherein the groove comprises a plurality of slits extending from the underside surface of the substrate toward the top surface of the substrate without perforating the substrate.