Patent ID: 7436681
Filing Date: 2008-10-14
Classification: H01L,H05K,Y10T

Abstract:
1. A wiring board with built-in capacitors, that has a multilayer wiring structure and capable of mounting an IC chip thereon, said wiring board with built-in capacitors comprising: a first capacitor that is built into the multilayer wiring structure and formed so that an overlapping area between a first lower electrode and a first upper electrode provided on respective surfaces of a first dielectric layer is a predetermined area; a second capacitor that is built into the multilayer wiring structure along the same plane as the first dielectric layer and formed so that an overlapping area between a second lower electrode and a second upper electrode provided on respective surfaces of a second dielectric layer with the same thickness as the first dielectric layer is different from the predetermined area; a line that electrically connects either one of a power pad for supplying power to the IC chip and a ground pad for grounding the IC chip to either one of the first lower electrode and the second lower electrode; and a line that electrically connects the other of the power pad and the ground pad to the other of the first upper electrode and the second upper electrode, wherein the first and second upper electrodes are formed of copper and the first and second lower electrodes are formed of nickel.