MANUFACTURING METHOD OF PLASTIC SUBSTRATE HAVING ELECTRIC CIRCUIT

PROBLEM TO BE SOLVED: To provide a manufacturing method of a plastic substrate having an electric circuit capable of forming the electric circuit not by a conventional complicated method but by a simplified method, and realizing the high density of the pattern width and the pattern interval. SOLUTION: In this manufacturing method of the plastic substrate having the electric circuit, a thin film 11 with metal particles diffused therein is manufacture on the plastic substrate 5, and the thin film 11 is irradiated with laser beam to allow the metal particles coagulated in a groove-like circuit pattern 12 as a core. After the thin film remained in an area not irradiated with the laser beam is removed, the plastic substrate 5 is immersed in an electroless electrolyte, and a plating layer 13 is deposited on the circuit pattern 12 to form an electric circuit. COPYRIGHT: (C)2003,JPO