Manufacturing method of a liquid crystal display
First Claim
1. A manufacturing method of a liquid crystal display, comprising the steps of:
- forming a gate insulating film, a semiconductor film, and a first insulating film in this order on a substrate and gate bus lines that are formed on the substrate;
forming channel protective films extending along the respective gate bus lines by performing back exposure using the gate bus lines as a mask and then patterning the first insulating film;
forming, for each pixel region, on the associated channel protective film, a source electrode and a drain electrode that are opposed to each other; and
forming, by etching away at least the associated channel protective film and the semiconductor film, two device isolation holes over the associated gate bus line at two locations that are on both sides of the source electrode and the drain electrode.
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Accused Products
Abstract
It is intended to provide a manufacturing method of a liquid crystal display that can reduce the manufacturing cost by decreasing the number of masks. A gate insulating film, a semiconductor film, and a silicon nitride film are laid on a substrate on which a gate bus line is formed, back exposure is performed by using the gate bus line as a mask, and the silicon nitride film is then patterned, whereby a channel protective film is formed along the gate bus line. Two device isolation holes are formed over the gate bus line at two locations that are on both sides of a source electrode and a drain electrode and that are separated from each other in the extending direction of the gate bus line. A thin-film transistor is formed in such a manner that a semiconductor active film is formed by a portion of the semiconductor film that is interposed between the two device isolation holes and is thereby electrically isolated from other pixel regions and that a gate electrode is formed by a portion of the gate bus line that is located between the two device isolation holes.
72 Citations
3 Claims
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1. A manufacturing method of a liquid crystal display, comprising the steps of:
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forming a gate insulating film, a semiconductor film, and a first insulating film in this order on a substrate and gate bus lines that are formed on the substrate;
forming channel protective films extending along the respective gate bus lines by performing back exposure using the gate bus lines as a mask and then patterning the first insulating film;
forming, for each pixel region, on the associated channel protective film, a source electrode and a drain electrode that are opposed to each other; and
forming, by etching away at least the associated channel protective film and the semiconductor film, two device isolation holes over the associated gate bus line at two locations that are on both sides of the source electrode and the drain electrode. - View Dependent Claims (2, 3)
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Specification