LED sub-mount and method for manufacturing light emitting device using the sub-mount
A LED sub-mount includes a substrate body and a plurality of first electrical-conductive layers. The substrate body has a first surface. The first electrical-conductive layers are positioned on the first surface of the substrate body, wherein the first surface between every adjacent two of the first electrical-conductive layers has an adhesive-filling groove.
1. A light emitting diode device comprising:
a substrate body having a first surface;
a plurality of first electrical-conductive layers disposed on the first surface of the substrate body, wherein the first surface between every adjacent two of the first electrical-conductive layers has an adhesive-filling groove, and the adjacent two of the first electrical-conductive layers are in direct contact with an outer side surface of the adhesive-filling groove and not in direct contact with an inner side surface of the adhesive-filling groove;
an LED chip mounted on the first surface by a flip-chip way, the LED chip having both two electrodes confronting and being in direct contact with the adjacent two of the first electrical-conductive layers; and
a cured glue disposed within the adhesive-filling groove and being aligned immediately below the LED chip, and the cured glue being sandwiched between and in direct contact with both the LED chip and the substrate body.
2. The light emitting diode device of claim 1 , wherein the substrate body further comprises a second surface opposite to the first surface, the second surface has a plurality of second electrical-conductive layers disposed thereon, each of the second electrical-conductive layers is aligned with a corresponding first electrical-conductive layer and electrically connected with the corresponding first electrical-conductive layer via a through hole of the substrate body.
3. The light emitting diode device of claim 1 , wherein the substrate body comprises a silicon substrate.
4. The light emitting diode device of claim 1 , wherein the adhesive-filling groove has a depth ranging from 5 microns to 100 microns.
5. The light emitting diode device of claim 1 , wherein the adhesive-filling groove has a width ranging from 25 microns to 500 microns.
6. The light emitting diode device of claim 1 , wherein the two electrodes are both located on a flat bottom side of the LED chip, and the flat bottom side of the LED chip confronts the adjacent two of the first electrical-conductive layers.