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:
Dec. 25, 1990
Filed:
Jan. 04, 1989
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360126 ;
Abstract
A thin-film-type magnetic head device for magnetically recording and/or reproducing signals in and from a magnetic recording medium has a lower magnetic layer, an insulating layer, a thin-film-type coil and an upper magnetic layer which are formed sequentially on a substrate such that a magnetic circuit is formed by the upper and lower magnetic layers. The upper and lower magnetic layers partially abut each other to provide a magnetic coupling therebetween. At least one slit formed in the region where the upper and lower magnetic layers abut each other, so as to suppress generation of eddy currents in the magnetic layers in the region.