Active solid-state devices (e.g. – transistors – solid-state diode – Non-single crystal – or recrystallized – semiconductor... – Amorphous semiconductor material
Patent
1996-08-26
1998-03-03
Whitehead, Carl W.
Active solid-state devices (e.g., transistors, solid-state diode
Non-single crystal, or recrystallized, semiconductor...
Amorphous semiconductor material
257 52, 257 53, 257 83, 257 88, 257443, 257431, H01L 2904, H01L 31036
Patent
active
057238782
ABSTRACT:
The present invention provides a thin film transistor substrate for a liquid crystal display panel. The thin film transistor substrate comprises the following elements. A pixel electrode is provided on a first predetermined region of the transparent insulative substrate. A first optical shielding film being is made of a metal and is provided on a peripheral region of the pixel electrode. A thin film transistor is provided on a second predetermined region of the transparent insulative substrate. The thin film transistor comprises a gate electrode provided on the transparent insulative substrate, a gate insulation film provided to extend over the second predetermined region to cover the gate electrode and also extend on at least an outer portion of the first optical shielding film, a source electrode extending at least over the gate insulation film over a first half of the gate electrode and being electrically connected to the pixel electrode, and a drain electrode extending at least over the gate insulation film over a second half of the gate electrode. A signal line extends over the gate insulation film to the drain electrode so that the signal line is positioned above the pixel electrode and separated by the gate oxide film from the pixel electrode. A second optical shielding film extends over the thin film transistor provided on the second region and also extends over an outer part of the first optical shielding film so that an opening portion of the pixel electrode is substantially defined by an inside edge of the first optical shielding film.
REFERENCES:
patent: 4862234 (1989-08-01), Koden
patent: 5164851 (1992-11-01), Kanemori et al.
patent: 5426313 (1995-06-01), Sukegawa et al.
NEC Corporation
Whitehead Carl W.
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