METHOD FOR PRODUCING PRINTED WIRING BOARD AND PRINTED WIRING BOARD PRODUCED BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a printed wiring board efficiently in which the relation between boring conditions and finishing state is stabilized, and a printed wiring board produced by that method. SOLUTION: Openings are made by etching the boring points of the copper foil in a copper clad multilayer plate, and an insulation layer exposed at the openings is vaporized and removed by means of laser while heating thus producing a printed wiring board.