The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2015
Filed:
Sep. 16, 2011
Applicant:
Seiji Hayashi, Yokohama, JP;
Inventor:
Seiji Hayashi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 1/11 (2006.01); H05K 1/02 (2006.01);
U.S. Cl.
CPC ...
H05K 1/0219 (2013.01); H05K 1/02 (2013.01); H05K 1/0216 (2013.01); H05K 1/115 (2013.01); H05K 1/116 (2013.01); H05K 2201/093 (2013.01); H05K 2201/0979 (2013.01); H05K 2201/09236 (2013.01); H05K 2201/09318 (2013.01); H05K 2201/09336 (2013.01); H05K 2201/09663 (2013.01);
Abstract
In a printed wiring board including a first wiring layer and a second wiring layer provided via an insulator layer, at least three guard ground wirings extending along a pair of signal wirings provided in the first wiring layer and supplied with a ground potential are provided between the pair of signal wirings. Thus, crosstalk noise can be reduced without widening a wiring area between the pair of signal wirings.