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:
Mar. 28, 1989
Filed:
Apr. 15, 1988
Hiroyuki Ota, Saitama, JP;
Kazuhiko Sato, Saitama, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A process for producing a magnetic head having a precisely defined recording width but which can be produced using simple process steps. Track width controlling grooves are formed in at least one of two core block halves made of a magnetic material. A thin film of a nommagnetic material, which serves as a gap spacer, is deposited on the bottoms of the track width controlling grooves and portions therebetween. A thin film layer of a metallic magnetic material is formed on the nonmagnetic thin film, and a thin film layer of a metallic magnetic material is formed on the surface of the other core to be brought into abutment against portions between the track width controlling grooves. The two core halves are then joined to form a core block with the thin film of metallic magnetic material on one core block half facing the thin film of metallic magnetic material on the other core block half. The thin films of metallic magnetic material are then etched away from all areas except where they contact each other as a result of the abutment of the two core block halves.