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Thin film transistor substrate and fabricating method thereof, liquid crystal display panel using the same and fabricating method thereof

  • US 20090284676A1
  • Filed: 07/22/2009
  • Published: 11/19/2009
  • Est. Priority Date: 12/31/2004
  • Status: Active Grant
First Claim
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1. A liquid crystal display device, comprising:

  • first and second substrates;

    a gate line on the first substrate;

    a gate insulating film on the first substrate;

    a data line crossing the gate line to define a pixel area;

    a pixel hole in the pixel area;

    a pixel electrode formed of a transparent conductive layer on the gate insulating film in the pixel hole in the pixel area;

    a thin film transistor including a gate electrode, a source electrode, a drain electrode, and a semiconductor layer;

    a pad connected to at least one of the gate line and the data line, and including a lower pad electrode on the substrate and an upper pad electrode in a first contact hole that passes through the gate insulating film to expose the lower pad electrode and connected to the lower pad electrode;

    a data link extending from the lower pad electrode and overlapping with the data line;

    a contact electrode in a second contact hole that passes through the gate insulating film to expose the data link to connect the data link to the data line, the contact electrode having a first surface contacted with the data line and a second surface contacted with the data link,wherein the semiconductor layer overlaps with a source/drain metal pattern including the data line, the source electrode, and the drain electrode;

    wherein the drain electrode protrudes from the semiconductor layer toward an upper portion of the pixel electrode, and the drain electrode connects to the pixel electrode; and

    wherein the semiconductor layer is removed from where it overlaps the transparent conductive layer.

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