Patent ID: 8129237

Claim:
A method of increasing light extraction from a vertical light-emitting diode (VLED) device, comprising: depositing a first n-doped layer above a carrier substrate; depositing a Si x N y mask above the first n-doped layer, wherein the Si x N y mask has openings exposing portions of the first n-doped layer; depositing a second n-doped layer above the Si x N y mask such that the second n-doped layer is also deposited in the openings; depositing an active layer for emitting light above the second n-doped layer; depositing a p-doped layer above the active layer; depositing one or more metal layers above the p-doped layer; removing the carrier substrate; removing the first n-doped layer and the Si x N y mask to expose a surface of the second n-doped layer; and roughening the exposed surface of the second n-doped layer to increase light extraction from the roughened surface.