| 摘要 |
PURPOSE:To connect both a power source and a ground layer to a metal core in a multilayer board and to reduce in thickness the board. CONSTITUTION:Metal cores 2, 2a of a multilayer printed circuit board with metal core provided in an inner layer of a multilayer board 1 are electrically insulated from one another and arranged in two layers so that one is used as a power source layer and the other is used as a ground layer. Outer surfaces of the cores 2, 2a are coated with insulating resin layers 5 to be insulated by utilizing the structure, and a blind hole 11 is formed between outer conductor patterns 9a and 9b of the two cores. |
