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:
Jan. 10, 2012
Filed:
Mar. 13, 2009
Applicants:
Hiroshi Katagiri, Kasugai, JP;
Toshiya Asano, Ichinomiya, JP;
Inventors:
Hiroshi Katagiri, Kasugai, JP;
Toshiya Asano, Ichinomiya, JP;
Assignee:
NGK Spark Plug Co., Ltd., Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05K 1/03 (2006.01);
U.S. Cl.
CPC ...
Abstract
A coreless wiring board has no core board but a laminated structure in which a conductor layer and resin insulating layers are alternately laminated into a multilayer. Each of the resin insulating layers is formed to contain a glass cloth in an epoxy resin. A plurality of via holes taking a shape of an inverse truncated cone and having steps on internal wall surfaces is formed to penetrate each of the resin insulating layers, and a filled via conductor for electrically connecting the conductors is formed in each of the via holes.