Active solid-state devices (e.g. – transistors – solid-state diode – Non-single crystal – or recrystallized – semiconductor... – Field effect device in non-single crystal – or...
Reexamination Certificate
2007-02-27
2007-02-27
Dickey, Thomas L. (Department: 2826)
Active solid-state devices (e.g., transistors, solid-state diode
Non-single crystal, or recrystallized, semiconductor...
Field effect device in non-single crystal, or...
C257S021000
Reexamination Certificate
active
10500514
ABSTRACT:
The present invention relates to a thin film transistor and a liquid crystal display. A gate electrode is formed to include at least one portion extending in a direction perpendicular to a gain growing direction in order to make electrical charge mobility of TFTs uniform without increasing the size of the driving circuit. A thin film transistor according to the present invention includes a semiconductor pattern a thin film of poly-crystalline silicon containing grown grains on the insulating substrate. The semiconductor pattern includes a channel region and source and drain regions opposite with respect to the channel region. A gate insulating layer covers the semiconductor pattern. On the gate insulating layer, a gate electrode including at least one portion extending in a direction crossing the growing direction of the grains and overlapping the channel region is formed. In a liquid crystal display according to the present invention, a plurality of thin film transistors forming a data driver circuit include thin films of polycrystalline silicon formed by sequential lateral solidification, at least one portion of a gate electrode of each thin film transistor extends in a direction crossing the grain growing direction, and at least one of the plurality of thin film transistors has a gate electrode having a pattern different from other thin film transistors.
REFERENCES:
patent: 5633738 (1997-05-01), Wakui et al.
patent: 6177301 (2001-01-01), Jung
patent: 2001/0001745 (2001-05-01), Im et al.
patent: 2005/0230683 (2005-10-01), Yamaguchi et al.
patent: 01124824 (1989-05-01), None
patent: 07321328 (1995-08-01), None
Chung Woo-Suk
Kang Myung-Koo
Kang Sook-Young
Kim Hyun-Jae
Dickey Thomas L.
F. Chau & Assoc. LLC
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