Patent ID: 7982139
Filing Date: 2011-07-19
Classification: H05K

Abstract:
1. A multilayer printed wiring board comprising: a built-up portion comprising a plurality of insulating layers, a plurality of wiring patterns formed on the insulating layers, and a plurality of via holes electrically connecting the wiring patterns through the insulating layers; a mounting portion configured to mount a semiconductor element electrically connected to the wiring patterns; and a layered capacitor portion disposed between the mounting portion and the build-up portion and comprising a high dielectric constant layer and first and second layer electrodes sandwiching the high dielectric constant layer, the high dielectric constant layer comprising a high dielectric constant sheet, wherein the mounting portion has a plurality of first pads and a plurality of second pads, the first pads are electrically connected to the first layer electrode through a plurality of first rod terminals passing through the first layer electrode in a contacting manner and through the second layer electrode in a non-contacting manner, the second pads are electrically connected to the second layer electrode through a plurality of second rod terminals passing through the second layer electrode in a contacting manner and through the first layer electrode in a non-contacting manner, the high dielectric constant sheet comprises a calcined body of a high dielectric constant material, and one of the first and second layer electrodes is connected to a power supply line of the semiconductor element and other one of the first and second layer electrodes is connected to a ground line.