Patent ID: 7786390
Filing Date: 2010-08-31
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 at least one penetrating-hole 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 the penetrating-hole of the insulating resin substrate and electrically connecting the first conductor and the second conductor, wherein the penetrating-hole 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, wherein the first portion has an axis of the center of gravity, the second portion has an axis of the center of gravity, the axis of the center of gravity of the first portion is out of alignment with the axis of the center of gravity of the second portion.