Patent ID: 8277901
Filing Date: 2012-10-02
Classification: B82Y,H01L,H05K,Y10T

Abstract:
1. A method of manufacturing a flexible printed circuit board, the method comprising: moving a nozzle from an unelevated position to an elevated position; forming a gate electrode on a substrate by moving the nozzle and the substrate relative to each other so as to apply a first semiconductor material coating liquid to a surface of said substrate, said nozzle being disposed on a lower side of said substrate and said substrate being faced down with the surface of said substrate including a first recess-projection structure having a first recessed portion and a first projected portion being controlled in wettability so as thereby to apply said first semiconductor material coating liquid to the first recessed portion of said substrate so as to form a first uniform semiconductor coating layer such that an entire coating thickness of the first semiconductor coating layer is substantially equal to an entire thickness of a material of the first projected portion, wherein the first semiconductor coating layer contacts the first projected portion and wherein when the substrate is faced upwardly, an uppermost surface of the material of the first projected portion is formed to be substantially flush with an uppermost surface of the first uniform semiconductor coating layer and a lowermost surface of the material of the first projected portion is formed to be substantially flush with a lowermost surface of the first uniform semiconductor coating layer, said first semiconductor coating liquid being applied as a liquid by capillarity; drying said first semiconductor material coating liquid so as thereby to obtain a circuit pattern including a semiconductor material coating layer for formation of the gate electrode; forming a gate insulation layer adjacent to the gate electrode; forming source and drain electrodes adjacent to the gate insulation layer; and moving the nozzle from the elevated position to a lowered position.