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:
Jul. 23, 2002
Filed:
Nov. 13, 2000
Applicant:
Inventors:
Masaya Kousaka, Miyagi, JP;
Kaoru Aoki, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/147 ;
U.S. Cl.
CPC ...
G11B 5/147 ;
Abstract
A magnetic head shows a remarkably reduced eddy-current loss. The metal magnetic film of the magnetic core of the magnetic head has a multilayer structure obtained by laying alternately metal magnetic layers and insulating layers . The nonmagnetic film of the magnetic head that provides a magnetic gap is also made to have a multilayer structure obtained by arranging first films made of an insulating material, second films made of Cr and a third film made of Au as mentioned from the sides held in contact with the metal magnetic film