| 摘要 |
PROBLEM TO BE SOLVED: To improve quality etc., by charging resin in a core hole of a metal core without leaving any air bubble when a metal core printed wiring board is manufactured. SOLUTION: Before a resin-impregnated sheet 21 is put over the metal core 11 having the core hole 13, a conductive metal coating portion 22 made of copper foil 22a is provided on one side 21b of the resin-impregnated sheet 21 on the opposite side from a surface facing the metal core 11 and an end surface 21c connecting with the one side 21b and at an outer peripheral edge part 21d of a base material opposition surface connecting with the lower end surface, thereby preventing resin from projecting during heating and pressing. COPYRIGHT: (C)2009,JPO&INPIT
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