PRINTED WIRING BOARD, MULTILAYER PRINTED WIRING BOARD, AND, METHOD OF DETECTING FOREIGN MATTER AND VOIDS IN INNER LAYER OF MULTILAYER PRINTED WIRING BOARD

摘要

In a multilayer printed wiring board, a first electrode 20 and a second electrode 23 adjacent to said first electrode 20 are formed in an internal layer portion 11B of the waste substrate portion of the multilayer printed wiring board, and a first terminal portion electrically connected to the first electrode 20 and a second terminal portion electrically connected to the second electrode 23 are formed on an outer surface.