WIRING BOARD, WIRING BOARD ASSEMBLY, AND METHODS OF MANUFACTURING THE WIRING BOARD AND THE WIRING BOARD ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To provide a wiring board and an assembly of the wiring board, capable of suppressing formation of gas reservoirs at the bottom of a via hole without causing any large-scale investment in facilities. SOLUTION: The wiring board includes a groove 6 for allowing the via hole 4 to communicate with the outside within a range of a land 5, where the groove guides gas residing in the via hole 4 to the outside of the via hole 4 when filling a conductor. COPYRIGHT: (C)2011,JPO&INPIT