Patent ID: 7361566
Filing Date: 2008-04-22
Classification: H01L

Abstract:
1. A method of forming poly-silicon thin film transistors employed for flat panel display, comprising the steps of: forming a buffer layer on a substrate; forming an amorphous silicon layer on the buffer layer; forming a gate insulator on the amorphous silicon layer; forming a gate metal on the gate insulator; utilizing the gate metal as a mask to ion implant the amorphous silicon layer on two sides of the gate metal for defining a source/drain region in the amorphous silicon layer; forming a dielectric interlayer on the gate metal and the gate insulator; patterning the dielectric interlayer to form contact holes; forming a source/drain metal on the dielectric interlayer and in the contact holes to connect the source/drain region in the amorphous silicon layer; patterning the source/drain metal to form a data line; and performing a heating process with an IR energy source, wherein the gate metal and the source/drain metal rapidly absorb heat energy from the IR energy source and transfer the heat energy to the amorphous silicon layer, and the amorphous silicon layer subsequently crystallizes to become a poly-silicon layer.