Patent ID: 9537057
Date: 2017-01-03
CPC Classifications: H01L

Claim:
1. A surface-mounted LED light-emitting device, comprising: an LED epitaxial structure having opposite a first surface and a second surface, wherein the first surface is a light-emitting surface; P and N electrode pads over the second surface of the epitaxial structure, which has a sufficient thickness to support the LED epitaxial structure, and the P and N electrode pads each have opposite a first electrode surface and a second electrode surface, respectively, wherein the first electrode surface is adjacent to the LED epitaxial structure; an insulator between the P and N electrode pads to prevent the P and N electrode pads from a short circuit; a supporting substrate; and a solder layer in contact with and between the supporting substrate and the P and N electrode pads; wherein a chip structure including the LED epitaxial structure, the P and N electrode pads, and the insulator is directly mounted over the supporting substrate via the P and N electrode pads through SMT packaging; and wherein the insulator extends through the solder layer and is in contact with the solder layer and the supporting substrate; wherein the insulator has opposite a first and a second insulator surfaces, wherein the first insulator surface is adjacent to the LED epitaxial structure and the second insulator surface extrudes beyond either of the second electrode surfaces of the P and N electrode pads to prevent the P and N electrode pads from a short circuit when directly applied in the SMT package, wherein a distance between edges of the P and N electrode pads beyond that of the LED epitaxial structure is D, a minimum thickness of the P and N electrode pads is T, and wherein D/T is 0.5-2.