Patent ID: 9293676
Filing Date: 2016-03-22
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a light-emitting diode (LED) chip, the method comprising: forming an LED on a first substrate, the LED comprising an N-type semiconductor layer and a P-type semiconductor layer, the LED being formed to expose surfaces of the N-type and P-type semiconductor layers; forming bumps respectively electrically connected to the N-type and P-type semiconductor layers; forming electrode pads corresponding to the bumps on a second substrate; aligning the LED chip and the second substrate so that the bumps respectively correspond to the electrode pads, and increasing a temperature of the bumps to a first temperature; applying a pressure to the first and second substrates, and increasing the temperature of the bumps to a second temperature for a first time period while maintaining the pressure; and maintaining the second temperature from the first time period to a second time period while maintaining the pressure, and then releasing the pressure and cooling the bumps, wherein: a first region of a bump among the bumps comprises a first portion at a first side thereof adjacent to an electrode pad of the electrode pads, the first region of the bump comprising gold and tin; and a second region of the bump comprises a second portion at a second side thereof adjacent to a semiconductor layer among the semiconductor layers, the second region of the bump comprising gold.