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Thin film transistor array having single light shield layer over transistors and gate and drain lines

  • US 5,327,001 A
  • Filed: 04/01/1993
  • Issued: 07/05/1994
  • Est. Priority Date: 09/09/1987
  • Status: Expired due to Term
First Claim
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1. A thin film transistor array, comprising:

  • a single substrate;

    a plurality of thin film transistors formed on said single substrate, each thin film transistor having at least a gate electrode, a semiconductor layer having a channel portion and a source electrode and a drain electrode;

    a plurality of gate lines and a plurality of drain lanes provided over said single substrate in an intersecting relation via an insulating film, said gate lines and drain lines being connected to gate and rain electrodes of the transistors at locations near the respective intersections of the gate and rain lines;

    a plurality of transparent electrodes electrically connected to the source electrodes and providing a matrix array arranged in a plurality of regions surrounded with the gate and drain lines, respectively;

    a transparent insulating film formed at least on said thin film transistor, said gate lines and said drain lines, said transparent insulating film having a first surface which is in contact at least with said thin film transistors and said gate and drain lines, and a second surface which is an opposite surface opposing said first surface; and

    a single light shield film formed on said second surface of said transparent insulating film, said single light shield film being over said single substrate so as to cover the channel portions of said transistors, said gate lines, and said drain lines, and said single light shield film having a width which is not less than an interval between adjacent peripheral edges of said plurality of transparent electrodes, so as to overlap the edges of said plurality of transparent electrodes, to thereby shield said plurality of transparent electrodes, to thereby shield said channel portions from light and to shut of light leaking from among a plurality of transparent electrodes.

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