Patent ID: 8537296

Claim:
A display device, comprising: a substrate; a first conductor disposed on the substrate; a first insulating layer disposed on the first conductor; a second insulating layer disposed on the first insulating layer; a semiconductor disposed on the second insulating layer; and a second conductor disposed on the semiconductor, wherein a thickness of the first insulating layer is greater than a thickness of the first conductor, wherein the first conductor, the second insulating layer, the semiconductor, and the second conductor form a thin film transistor, wherein the first insulating layer comprises a first opening exposing a top surface of the first conductor, the top surface of the first conductor being substantially parallel to a surface of the substrate, the first opening facing a channel region of the thin film transistor, and wherein the second insulating layer and the semiconductor are disposed, at least in part, in the first opening, and the second insulating layer directly contacts the top surface of the first conductor in the first opening, wherein the first insulating layer completely covers lateral side surfaces of the first conductor, wherein a first portion of the first insulating layer disposed directly on the first conductor has a first thickness, a second portion of the first insulating layer not disposed directly on the first conductor has a second thickness, and the second thickness is greater than the first thickness.