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:
Sep. 21, 1999
Filed:
Jul. 28, 1997
Applicant:
Inventors:
Masahiro Onizuka, Akita, JP;
Yutaka Saito, Akita, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
252 6263 ; 252 6259 ;
Abstract
The invention provides a hexagonal Z type magnetic oxide sintered material having a high resistivity and high density, and an impedance device using the same. The hexagonal Z type magnetic oxide sintered material contains a main oxide component containing M wherein M is at least one of Ba and Sr, Co, and Fe and an auxiliary oxide component containing Si, having a resistivity of at least 10.sup.6 .OMEGA.-cm, a sintered density of at least 4.6 g/cm.sup.3, and an initial magnetic permeability of 5 to 25. Pb may be contained in the auxiliary oxide component. Co may be partially replaced by Me wherein Me is at least one of Ni, Zn, and Cu.