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. 13, 1976
Filed:
Jan. 09, 1975
Applicant:
Inventors:
Theodorus Cornelius Bertens, Eindhoven, NL;
Hendrikus Josephus Van Dijk, Eindhoven, NL;
Jan T Gerkema, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; H01F / ;
U.S. Cl.
CPC ...
29603 ; 29580 ; 29591 ; 2041293 ; 20412935 ;
Abstract
The invention relates to a method of manufacturing a device, for example, a magnetic head for recording and playing back information on a magnetisable medium. In this method, a substrate of semiconductor material is profiled by a selective electrolytic etching process. Preceding the etching process, the part of the substrate to be removed by said process is formed by a local doping treatment, for example, by diffusion. The doping treatment may be carried out in several overlapping steps.