PRINTED CIRCUIT MULTILAYER BOARD

摘要

PURPOSE: A printed circuit multilayer board is provided to be able to form an outer circuit easily to the upper area of the through- hole formed in the inner layer of the printed circuit multilayer board, by means of laser hole processing. CONSTITUTION: The printed circuit multilayer board comprises; an inner layer circuit(110) on up and down the board(100); an insulation layer(130) spread on upper and lower area of the inner circuit(110) to insulate it; a perforated hole(140) on the board(100) on which an insulating layer(130) is spread; an electrolysis plating layer(150) formed inner side of the perforated hole; a non-conductive resin charger(160) charged in the perforated hole(140) of the board(100).