WIRING BOARD AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To improve connecting reliability of a first conductor wiring to a second conductor wiring in a double-side wiring board using a glass epoxy board. SOLUTION: The wiring board comprises the first conductor wiring provided on a first main surface of a tape-like insulating board, and the second conductor wiring provided on a second main surface opposed to the first main surface of the insulating board to be electrically connected to the first wiring. In this wiring board, the insulating board is a board made of a fibrous insulating base and an insulating resin. The first and second wirings are electrically connected by a conductive material filed in an opening provided by punching the insulating board by a die.