Liquid crystal display device and a method of manufacturing the same

Claim 1

A pad for providing an electrical connection to a switching device, said pad comprising: a substrate; an insulating layer over said substrate; a semiconductor active layer over said insulating layer; a data electrode having a first portion on and contiguous to said insulating layer and a second portion over said semiconductor active layer; a passivation layer on said second portion of said data electrode; and an indium tin oxide layer on said first portion of said data electrode for connecting the pad to wiring external to the switching device.

Claim 12

A method of manufacturing a liquid crystal display device, comprising the steps of: forming a first conductive layer on a substrate; patterning said first conductive layer to form a gate electrode and a gate pad; forming an insulating film on said substrate including said gate electrode and said gate pad; forming a semiconductor layer on said insulating film; forming an impurity-doped semiconductor layer on said semiconductor layer; selectively removing a portion of said impurity doped semiconductor layer and said semiconductor layer, except for a portion overlying said gate electrode; forming a second conductive layer on said substrate; pattering said second conductive layer to form a source electrode, a source pad, and a drain electrode, said source electrode connected to said source pad; forming passivation film on the entire surface of said subsrate; selectively etching said passivation film and said insulating film to form a first contact hole to expose said source pad, a second contact hole to expose a portion of said drain electrode, and a third contact hole to expose said gate pad; forming a transparent conductive layer on said substrate; and patterning said transparent conductive layer to form a first transparent conductive layer pattern connected with said source pad via said first contact hole, a pixel electrode connected with said drain electrode through said second contact hole, and a second transparent conductive layer connected with said gate pad through said third contact hole.

Claim 13

A method of manufacturing a liquid crystal display device, comprising the steps of: forming a first conductive layer on a substrate; patterning said first conductive layer to form a gate electrode and a gate pad; forming an insulating film on said substrate including said gate electrode and said gate pad; forming a semiconductor layer on said insulating film; forming an impurity-doped semiconductor layer on said semiconductor layer; selectively removing a portion of said impurity doped semiconductor layer and said semiconductor layer, except for a portion overlying said gate electrode; forming a second conductive layer on said substrate; pattering said second conductive layer to form a source electrode, a source pad, and a drain electrode, said source electrode connected to said source pad; forming passivation film on the entire surface of said subsrate; selectively etching said passivation film and said insulating film to form a first contact hole to expose said source pad, a second contact hole to expose a portion of said drain electrode, and a third contact hole to expose said gate pad; forming a transparent conductive layer on said substrate; and patterning said transparent conductive layer to form a first transparent conductive layer pattern connected with said source pad via said first contact hole, a pixel electrode connected with said drain electrode through said second contact hole, and a second transparent conductive layer connected with said gate pad through said third contact hole.