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:
May. 28, 2002
Filed:
Dec. 06, 1999
Applicant:
Inventor:
Mizuki Iwanami, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 1/11 ; H05K 1/14 ;
U.S. Cl.
CPC ...
H05K 1/11 ; H05K 1/14 ;
Abstract
An inter-layer structure between a power layer and a ground layer of a printed circuit board includes an insulative magnetic structure with at least two layers of insulative magnetic substances with different complex magnetic permeability frequency characteristics.