Patent ID: 6372560
Filing Date: 2002-04-16
Classification: G02F,H01L

Abstract:
A process for forming a thin film transistor (TFT) matrix for a liquid crystal display (LCD), comprising steps of:providing a substrate made of an insulating material; forming a first conductive layer on a first side of said substrate, and using a first masking and patterning procedure to form a scan line and a gate electrode of a TFT unit; successively forming an insulation layer, a semiconductor layer, a doped semiconductor layer, and a photoresist layer on said substrate with said scan line and said gate electrode; providing an exposing source from a second side of said substrate opposite to said first side by using said scan line and said gate electrode as shields to form an exposed area and an unexposed area; removing said photoresist, said doped semiconductor layer, and said semiconductor layer of said exposed area so that the remaining portion of said semiconductor and said doped semiconductor layers in said unexposed area has a specific shape substantially identical to the shape of said scan line together with said gate electrode; forming a second conductive layer on said substrate with said semiconductor and said doped semiconductor layer of said specific shape, and using a second masking and patterning procedure to integrally form a data line, a first connection line between said TFT unit and said data line, and a second connection line connecting to said TFT unit; removing a portion of said doped semiconductor layer with said data line, and said first and said second connection lines as shields; and forming a transparent conductive layer on said substrate with said data line, and said first and said second connection lines, and using a third masking and patterning procedure to form a pixel electrode which is connected to said TFT unit through said second connection line.