METHOD OF PRODUCING SILVER CONDUCTIVE FILM

摘要

PROBLEM TO BE SOLVED: To provide a method of producing a silver conductive film which enables easy and inexpensive formation of a siver conductive film minute, thin and uniform in thickness by relief printing, e.g. flexographic printing.SOLUTION: In a method of producing a silver conductive film 10 is based on forming a thin and long belt-like silver conductive film 10 of a shape of e.g. an RFID antenna by applying a silver fine particle dispersion onto a substrate by relief printing, e.g. flexographic printing and baking, the shape of the top face of the convex part (relief) 12a of a relief printing plate, e.g. a flexographic printing plate 12, used in relief printing, e.g. flexographic printing is formed in the same shape as the thin and long belt-like shape of the silver conductive film 10. In the top surface of the convex part 12a of the relief printing plate, a groove part which extends in the longitudinal direction of the convex part 12a and reduces gradually in width toward the bottom surface is formed. The groove part divides the convex part 12a of the relief printing plate is divided into a plurality of line parts (minute convex parts) 12c, and the widths of the line parts 12c are decreased gradually toward the top surface of the convex part 12a of the relief printing plate.