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:
May. 03, 1988
Filed:
Dec. 15, 1986
Herbert Schewe, Herzogenaurach, DE;
Siemens Akteingesellschaft, Berlin and Munich, DE;
Abstract
A magnetic memory comprising a thin-film magnetic head as well as a recording medium which is provided with a storage layer that can be magnetized perpendicularly (vertically). The magnetic head comprises two magnet legs having a magnetic layer each, the magnetic poles of which are arranged in tandem, forming a gap therebetween. With this magnetic head, a write and read function with high efficiency is obtained. It is provided for this purpose that at least one magnetic layer of the trailing magnet leg differs at least in its end region with respect to its magnetic behavior (magnetic resistance; saturation magnetization) from the at least one magnetic layer of the leading magnet leg at least in its end region, and that the coercivity of the material of the storage layer of the recording medium is chosen sufficiently high, so that overwriting of the storage layer of the recording medium by the trailing magnet leg is, at least largely, eliminated.