Patent ID: 9192044
Filing Date: 2015-11-17
Classification: H01L,H05K

Abstract:
1. A printed wiring board having a plurality of conductor layers, the printed wiring board comprising: a first conductor layer having a first signal wiring pattern and a second signal wiring pattern formed therein; a second conductor layer which is formed on a second surface of the printed wiring board and which has a first external electrode pad and a second external electrode pad formed therein, the first external electrode pad being electrically connected to the first signal wiring pattern through a first via, the second external electrode pad being electrically connected to the second signal wiring pattern through a second via; and a third conductor layer disposed between the first conductor layer and the second conductor layer through intermediation of an insulator, the third conductor layer having a first pad formed therein, the first pad being electrically connected to the first via, wherein the first external electrode pad is connectable to a first terminal and the second external electrode pad is connectable to a second terminal, and wherein the first pad comprises an opposed portion which overlaps the second external electrode pad at a second opposed portion of the second external electrode pad as viewed in a direction perpendicular to a surface of the printed wiring board and which is opposed to the second external electrode pad through intermediation of the insulator such that capacitive coupling between the first and second opposed portions is provided.