Patent ID: 8530144
Filing Date: 2013-09-10
Classification: G03F,H01L

Abstract:
1. A method for fabricating source/drain electrodes of a thin film transistor, comprising: providing a substrate having a first gate electrode and a second gate electrode adjacent and electrically connected thereto, wherein the first and second gate electrodes are successively covered by a gate dielectric layer, a semiconductor layer, and a metal layer; coating a photoresist layer on the metal layer; performing an exposure process on the photoresist layer by a photomask comprising: performing a development process on the exposed photoresist layer to form a photoresist pattern layer with different thicknesses on the metal layer, wherein the photoresist pattern layer corresponding to the U-shaped and rectangular channel-forming regions has a thickness less than that of the photoresist pattern layer corresponding to the pairs of first and second source/drain-forming regions; and etching the metal layer using the photoresist pattern layer as an etch mask, to form a pair of first source/drain electrodes on the first gate electrode and a pair of second source/drain electrodes on the second gate electrode.