Patent ID: 7075108

Claim:
A thin film transistor matrix device comprising: an insulating substrate; a plurality of thin film transistors arranged on the insulating substrate in a matrix; a plurality of picture element electrodes arranged on the insulating substrate in a matrix and connected to the thin film transistors; a plurality of bus lines for commonly connecting the gates of the thin film transistors, the bus lines being made of a first conducting film; a first insulating film formed on the first conducting film; a second conducting film formed on the first insulating film; and a second insulating film formed on the first insulating film and the second conducting film; wherein, outside an image display region in which the plurality of picture elements are formed, a first contact hole is formed in the first insulating film and the second insulating film through the first conducting film, a second contact hole is formed in the second insulating film through the second conducting film, a third conducting film is formed between the first contact hole and the second contact hole on the second insulating film, the first conducting film is connected to the third conducing film via the first contact hole, and the second conducting film is connected to the third conducting film via the second contact hole.