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:
Oct. 29, 2013
Filed:
Apr. 27, 2010
Tadao Ookawa, Ibaraki, JP;
Mitsuru Honjo, Ibaraki, JP;
Daisuke Yamauchi, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
An FPC board includes a base insulating layer. A plurality of wiring traces are formed on the base insulating layer. The adjacent wiring traces are arranged at a distance d from each other, and each wiring trace has a predetermined width and a thickness t. Each transmission line pair is constituted by the two adjacent wiring traces of the plurality of wring traces. A ratio of the thickness tof the wiring trace to the distance d between the adjacent wiring traces is set to 0.8 or more. A cover insulating layer may be formed on the base insulating layer to cover the wiring traces. A metal layer having a predetermined thickness may be provided on a back surface of the base insulating layer. Furthermore, a differential impedance of each transmission line pair may be set to 100 Ω.