Printed wiring board and board module

摘要

A wiring board (20) includes a component-side patters (23) formed on a components mounting surface (22), a board-side pattern (25) is formed on a board mounting surface (24), a through hole via (26) electrically connecting the component-side pattern (23) and the board-side pattern (25). An electric insulation sheet (30) is adhered to the board mounting surface (24) to cover the through hole via (26) in the board mounting surface (24).