WIRING BOARD, ELECTRONIC DEVICE, AND ELECTRONIC MODULE

摘要

PROBLEM TO BE SOLVED: To provide a wiring board achieving high packaging reliability, and to provide an electronic device and an electronic module which use the wiring board.SOLUTION: A wiring board 1 of the invention includes: an insulation substrate 2; and an external electrode 3. The insulation substrate 2 has a lower surface 2a. A recessed part 4 is formed on the lower surface 2a. The external electrode 3 is provided on the lower surface 2a. The insulation substrate 2 has a protruding part 5 at the recessed part 4.