Patent ID: 9343620
Filing Date: 2016-05-17
CPC Classification: H01L

Claim Text:
1. A method for fabricating a light emitting diode die comprising: providing a carrier substrate; forming an epitaxial structure on the carrier substrate comprising a first type semiconductor layer, a multiple quantum well (MQW) layer on the first type semiconductor layer configured to emit light, and a second type semiconductor layer on the multiple quantum well (MQW) layer; forming a plurality of trenches through the epitaxial structure; forming a reflector layer on the second type semiconductor layer; forming a seed layer on the reflector layer and in the trenches; forming a first substrate layer on the seed layer configured to form a first substrate for the light emitting diode die having a first area; forming a second substrate layer on the first substrate layer configured to form a second substrate for the light emitting diode die having a second area less than the first area; patterning the second substrate layer to define the second area; removing the carrier substrate; forming a plurality of second trenches through the epitaxial structure to the seed layer to define an epitaxial stack for the light emitting diode die; and separating the epitaxial stack to form the first substrate with the first area and the second substrate with the second area.