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. 11, 1980
Filed:
Sep. 15, 1977
Winfried Berghof, Taufkirchen, DE;
Alfred Pichler, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A method for a definitive fixing of the breadth of magnetic layers in the vicinity of the end face of a recording carrier, which breadth determines the track breadth, in which an integrated magnetic head structure is carried on a substrate and has a large number of thin magnetic, non-magnetic, insulating and electrically conductive layers stacked one upon an another, and in which originally broader magnetic layers are partially worn down by ion bombardment, the zones not to be worn down being first covered with a mask. Ion bombardment is carried out at right angles to the thin layers, i.e. at right angles to the plane of the substrate, with the mask suitably disposed.