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:
Apr. 30, 2013
Filed:
Dec. 23, 2009
Kazuki Kajihara, Ogaki, JP;
Kazuki Kajihara, Ogaki, JP;
Ibiden Co., Ltd., Ogaki-shi, JP;
Abstract
A printed wiring board includes a substrate having a first surface, a second surface on the opposite side of the first surface and a through-hole extending between the first and second surfaces, a first conductive circuit formed on the first surface of the substrate, a second conductive circuit formed on the second surface of the substrate, and a through-hole conductor filling the through-hole and connecting the first and second conductive circuits. The through-hole has a first opening portion tapering from the first surface toward the second surface and a second opening portion tapering from the second surface toward the first surface. The substrate is made of a resin and a reinforcing material portion in the resin. The reinforcing material portion has a protruding portion protruding into the through-hole at the intersection of the first and second opening portions. The protruding portion encroaches into the through-hole conductor.