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
2007-11-20
2007-11-20
Landau, Matthew C. (Department: 2815)
Active solid-state devices (e.g., transistors, solid-state diode
Non-single crystal, or recrystallized, semiconductor...
Field effect device in non-single crystal, or...
C257S064000, C257SE29292
Reexamination Certificate
active
10779781
ABSTRACT:
The present invention relates to a flat panel display device comprising a polycrystalline silicon thin film transistor and provides a flat panel display device having improved characteristics by having a different number of grain boundaries included in polycrystalline silicon thin film formed in active channel regions of a driving circuit portion and active channel regions of pixel portion. This may be achieved by having a different number of grain boundaries included in the polycrystalline silicon thin film formed in active channel regions of a switching thin film transistor and a driving thin film transistor formed in the pixel portion, and by having a different number of grain boundaries included in polycrystalline silicon thin film formed in active channel regions of a thin film transistor for driving the pixel portion for each red, green and blue of the pixel portion. Further, this may be achieved by having a different number of grain boundaries included in polycrystalline silicon formed in active channel regions of an NMOS thin film transistor and a PMOS thin film transistor for forming CMOS transistor used in flat panel display device, thereby constructing a thin film transistor to obtain the improved characteristics for each transistor.
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Koo Jae-Bon
Lee Ki-Yong
Lee Ul-Ho
Park Hye-Hyang
Park Ji-Yong
H.C. Park & Associates PLC
Landau Matthew C.
Samsung SDI & Co., Ltd.
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