Patent ID: 9502486
Filing Date: 2016-11-22
CPC Classification: H01L

Claim Text:
1. A method of manufacturing an organic light-emitting diode (OLED) display, comprising: forming a first semiconductor layer and a second semiconductor layer over a substrate; forming a gate insulating layer over the first and second semiconductor layers and the substrate; forming a first gate electrode over the gate insulating layer such that the first gate electrode is formed directly above at least a portion the first semiconductor layer; forming a first interlayer insulating layer over the first gate electrode and the gate insulating layer; forming a second gate electrode over the first interlayer insulating layer such that the second gate electrode is formed directly above at least a portion of the first gate electrode; forming a third gate electrode over the first interlayer insulating layer such that the third gate electrode is formed directly above at least a portion of the second semiconductor layer; and doping the first and second semiconductor layers, wherein the width of the second gate electrode is less than that of the first gate electrode, wherein the first semiconductor layer includes a first channel region, a first source region, a first drain region, and a lightly doped region between i) the first channel region and ii) the first source and drain regions, wherein the lightly doped region overlaps the first gate electrode and does not overlap the second gate electrode.