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:
Sep. 06, 1977
Filed:
Jul. 08, 1976
Tadashi Morokuma, Tokyo, JA;
Naotsune Tsuda, Hachioji, JA;
Olympus Optical Co. Ltd., Tokyo, JA;
Abstract
A method is provided of manufacturing magnetic heads which comprises the steps of providing a pair of core block pieces each having a gap defining surface, masking a pair of spaced areas of the gap defining surface of one core block piece, subjecting the gap defining surface of said one core block piece to etching by an ion beam or plasma sputtering, disposing the etched core block piece and the other non-etched core block piece in abutting relationship so that the respective gap defining surfaces are located opposite to each other, placing a gap forming material in a clearance formed between the gap defining surfaces of the both core block pieces as a result of the etching step applied to one of the gap defining surfaces, causing the gap forming material to melt and permeate into the clearance, and subsequently causing the gap forming material to solidify to provide a core block, which is cut to size to produce a core or cores.