Patent ID: 8101865
Filing Date: 2012-01-24
Classification: C25D,H05K,Y10T

Abstract:
1. A printed wiring board comprising: an insulating resin substrate having a first surface and a second surface, the insulating resin substrate having a plurality of penetrating-holes passing through the insulating resin substrate from the first surface to the second surface; a first conductor formed on the first surface of the insulating resin substrate; a second conductor formed on the second surface of the insulating resin substrate; and a through-hole conductor structure formed in each penetrating-hole of the insulating resin substrate and electrically connecting the first conductor and the second conductor, wherein each of the plurality of penetrating-holes has a first portion having an opening on the first surface and a second portion having an opening on the second surface, and the first portion and the second portion are connected such that the first portion and the second portion are off set from each other and a connection cross-section where the first and second portions connect has a position of center of gravity, and the position of center of gravity of a first through-hole conductor is closer to the first surface than the position of center of gravity of a second adjacent through-hole conductor of the insulating resin substrate.