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. 22, 1986
Filed:
Nov. 09, 1983
Toyoo Nishiyama, Tokyo, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A magnetic head is made by forming a first half core having at least two substantially parallel plane surfaces and one lateral surface, the distance between the two plane surfaces being equal to or greater than a predetermined track width fixing one of the two plane surfaces of the first half core on part of one plane surface of a non-magnetic substrate so that the one lateral surface of the first half core meets with the one plane surface of the substrate, and depositing a magnetic insulator to a substantially uniform thickness on the other of the two plane surfaces and the one lateral surface of the first half core and the remaining part of the one plane surface of the substrate, thereby forming a gap spacer, depositing the same material for the first half core to a substantially uniform thickness on the gap spacer film, thereby forming a second half core having a thickness equal to or greater than the predetermined track width, and removing at least part of the gap spacer film lying on the other plane surface of the first half core and part of the second half core lying on said part of the gap spacer film to be removed from the other plane surface of the first half core, thereby forming a magnetic head.