MULTI-PIECE WIRING BOARD AND WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a multi-piece wiring board which improves electric insulation between exposed parts of a connection conductor that connects wiring conductors with each other, and the wiring conductor in a boundary of a wiring board region.SOLUTION: The multi-piece wiring board includes: a mother board 1 in which a plurality of insulation layers 3 are laminated and a plurality of wiring board regions 2 are arrayed; a plurality of wiring conductors which are arrayed along a boundary of the wiring board regions 2 between first layers 3a of the insulation layers 3 and provided over a boundary of the wiring board regions 2 between the neighboring wiring board regions 2 and include exposed parts covered by plating layers in the boundary; the wiring conductors which are provided between second layers 3b different from the first layers 3a over the boundary of the wiring board regions between the neighboring wiring board regions 2 and neighboring to each other in an array direction of the wiring conductors; and a plurality of connection conductors which are alternately connected in one of the neighboring wiring board regions and the other wiring board region.