WIRING BOARD, ELECTRONIC DEVICE, AND ELECTRONIC MODULE

摘要

PROBLEM TO BE SOLVED: To provide a wiring board which makes good electric connection between an inner surface electrode provided on an inner surface of a cutout part and a wiring conductor provided at an insulating substrate.SOLUTION: A wiring board 1 includes: an insulating substrate 11 having a cutout part 12 opening on a main surface and a side surface; an inner surface electrode 13 provided on an inner surface of the cutout part 12; and a wiring conductor 14 provided in the insulating substrate 11. The inner surface electrode 13 is divided into multiple parts in a thickness direction of the insulating substrate 11.