Liquid crystal display device having polycrystalline TFT and...

Active solid-state devices (e.g. – transistors – solid-state diode – Non-single crystal – or recrystallized – semiconductor... – Amorphous semiconductor material

Reexamination Certificate

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C257S072000, C257S382000

Reexamination Certificate

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06963083

ABSTRACT:
A thin film transistor includes a substrate, a crystallized semiconductor layer formed over the substrate having a channel region, low-density impurity regions and high-density impurity regions, a gate insulating layer formed on the crystallized semiconductor layer, a first gate electrode formed on the gate insulating layer having a width corresponding to the channel region, a second gate electrode formed on the first gate electrode and on the gate insulating layer such that the second gate electrode overlaps the low-density impurity regions and a source electrode and a drain electrode respectively contacting the high-density impurity regions.

REFERENCES:
patent: 6420758 (2002-07-01), Nakajima
patent: 6512271 (2003-01-01), Yamazaki et al.
patent: 6559906 (2003-05-01), Kawachi et al.
Philips Electronics Document entitled “Device Architectures” 2001, pp. 14-21.

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