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:
Feb. 18, 1986
Filed:
Sep. 23, 1982
Applicant:
Inventors:
Toshiyuki Suzuki, Yokohama, JP;
Masanori Isshiki, Yokohama, JP;
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
360125 ; 360119 ; 360121 ;
Abstract
A perpendicular magnetic recording head comprising a pole formed of a highly permeable magnetic thin film facing at the end thereof the magnetic surface of a recording medium, a side member formed of a highly permeable magnetic material joined with the film surface of the pole, a nonmagnetic holder for holding the pole and the side member from the side surfaces, the nonmagnetic holder having coil hole, and an exciter coil wound around the pole and the side member through the coil hole, characterized in that the coil hole is gradually increasing in width from the end of the side member toward the rear.