US Patent No. 9,609,741

PRINTED CIRCUIT BOARD AND ELECTRONIC APPARATUS


Patent No. 9,609,741
Issue Date March 28, 2017
Title Printed Circuit Board And Electronic Apparatus
Inventorship Koji Noguchi, Yokohama (JP)
Assignee Canon Kabushiki Kaisha, Tokyo (JP)

Claim of US Patent No. 9,609,741

1. A printed circuit board comprising:
a printed wiring board;
a first electronic component having a first heat radiation pad;
a first circuit component provided for the first electronic component and having a first terminal;
a second electronic component having a second heat radiation pad and generating heat exhibiting a higher heat value than that
of the first electronic component;

a second circuit component provided for the second electronic component and having a second terminal; and
a conductor provided on the printed wiring board and having a conductor pattern part,
wherein the first electronic component, the first circuit component, the second electronic component, and the second circuit
component are mounted on the printed wiring board, the first heat radiation pad of the first electronic component, the first
terminal of the first circuit component, the second heat radiation pad of the second electronic component, and the second
terminal of the second circuit component are connected through the conductor; and

a thermal resistance between the second heat radiation pad and the first terminal is lower than a thermal resistance between
the first heat radiation pad and the first terminal.