Patent ID: 9629282
Date: 2017-04-18
CPC Classifications: H01L,H01P,H05K

Claim:
1. An electronic device comprising: a substrate; a conductor plane which is provided on an inner layer or a surface of the substrate; an electronic circuit which is mounted on the substrate; a heat sink which is mounted on an upper surface of the electronic circuit, includes a portion which does not overlap with the electronic circuit when seen in a plan view, faces the conductor plane, and is configured of a conductive material; a conductor via which is electrically connected to the heat sink on a surface of the heat sink contacting the electronic circuit, and extends toward but does not electrically connect to the conductor plane, and is located in the portion that does not overlap with the electronic circuit; and a stub which is connected to the conductor via and extends to be approximately parallel to the conductor plane, wherein a ratio h/w between a width w of the stub and a distance h between the stub and the conductor plane is less than or equal to 1, and