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. 06, 2003
Filed:
Jan. 19, 2001
Applicant:
Inventors:
Ko Ito, Tokyo, JP;
Yukio Takahashi, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 1/502 ; H01F 1/00 ; H01F 3/526 ;
U.S. Cl.
CPC ...
B32B 1/502 ; H01F 1/00 ; H01F 3/526 ;
Abstract
To use a media agitating mill of a wet internal circulation type when grinding materials, and offer oxide magnetic materials and coils in which influences of ZrO and Y O mixing when using partially stabilized zirconia as media beads are improved. The magnetic materials and coils are characterized in that Fe O , ZnO, NiO and CuO are main components, and Y O , ZrO and Bi O are contained with respect to these main components, where an amount of Y O is 0.007 to 0.028 wt % for the total amount, an amount of ZrO is 0.12 to 0.55 wt % therefor and an amount of Bi O is 0.03 to 10.12 wt % for the same.