Patent ID: 9059339
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A method for forming a semiconductor structure, comprising: removing, from a base substrate, a light-emitting diode (LED) stack originally grown thereupon to provide a released LED stack with an exposed surface, wherein the LED stack comprises from bottom to top, a first contact layer, an active layer, and a second contact layer having a polarity different from the first contact layer; forming a first electrically conductive layer on the exposed surface of the released LED stack; attaching the released LED stack to a support substrate from the first conductive layer side; forming a second electrically conductive layer on an uppermost surface of the released LED stack opposite to the exposed surface; forming a first opening through the second electrically conductive layer, the second contact layer, the active layer and partially through the first contact layer, wherein the first opening exposes a surface of the first contact layer beneath the uppermost surface of the first contact layer at a bottom of the first opening; forming a passivation layer atop remaining portions of the second conductive layer, sidewalls of the opening, and the surface of the first contact layer at the bottom of the first opening; removing portions of horizontal portions of the passivation layer to form a second opening and to re-expose the surface of the first contact layer at the bottom of the first opening, wherein the second opening exposes a portion of an uppermost surface of the remaining portions of the second conductive layer; and filling the first opening substantially with a first contact metal and filling the second opening substantially with a second contact metal.