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. 20, 2015
Filed:
Jun. 27, 2014
Applicant:
Shinko Electric Industries Co., Ltd., Nagano-ken, JP;
Inventors:
Assignee:
Shinko Electric Industries Co., Ltd., Nagano-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/48 (2006.01); H01L 23/52 (2006.01); H01L 29/40 (2006.01); H05K 1/11 (2006.01); H05K 1/18 (2006.01); H01L 23/498 (2006.01); H01L 21/48 (2006.01);
U.S. Cl.
CPC ...
H05K 1/115 (2013.01); H01L 21/486 (2013.01); H01L 21/4857 (2013.01); H01L 23/49822 (2013.01); H01L 23/49827 (2013.01); H05K 1/181 (2013.01); H01L 23/49866 (2013.01); H01L 2224/16225 (2013.01); H01L 2224/32225 (2013.01); H01L 2224/73204 (2013.01); H01L 2924/15311 (2013.01);
Abstract
A wiring board includes a first via hole in a first insulating layer to expose a first wiring layer. A first via in the first via hole includes an end surface. A second wiring layer is arranged on the first insulating layer and the end surface of the first via. A second insulating layer covers the second wiring layer. A second via hole in the second insulating layer exposes the second wiring layer. A second via in the second via hole is arranged above the first via through the second wiring layer. The outer surface of the first insulating layer is lower in surface roughness than an inner surface of the first via hole.