Patent ID: 8040201
Filing Date: 2011-10-18
Classification: H05K

Abstract:
1. A substrate, comprising: a power plane and a ground plane that are placed apart from and are substantially parallel to each other, wherein the ground plane includes a first conductive layer having a first conductivity, the power plane includes a second conductive layer having the first conductivity, and the power plane or the ground plane includes a third conductive layer having a second conductivity lower than the first conductivity; and at least one signal line that is placed between the power plane and the ground plane, wherein the third conductive layer faces the at least one signal line across a dielectric substance, and wherein a shortest distance between the at least one signal line and the ground plane is shorter than a shortest distance between the at least one signal line and the power plane, or a shortest distance between the at least one signal line and the power plane is shorter than a shortest distance between the at least one signal line and the ground plane.