Importance

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Abstract

A circuit board is capable of reduce the effect of bowing. The circuit board comprises a substrate, a plurality of first vias, a plurality of second vias, and a plurality of first blocks. The substrate comprises a conductive layer outside the first blocks. The first vias pass through the substrate and the conductive layer. The first blocks would comprise the second vias, which passes through the substrate. The first vias and the first blocks can be individually or jointly disposed in a central area of the substrate, around a fastening hole, or around a circuit component. The fastening hole can be connected to at least one of the second vias by a conducting wire when the first block with the second vias is disposed around the fastening hole.

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First Claim