Invention Grant
US07989708B2 Multi-layer wiring board 失效
多层接线板

Multi-layer wiring board
Abstract:
In a multi-layer wiring board in which board wirings are arranged in a plurality of wiring layers so as to be connected via a through hole, two through holes are provided in parallel, and two through holes are connected therebetween in both end portions of the respective through holes or one end portion thereof by the wiring board.
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