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:
Apr. 19, 2005
Filed:
Sep. 24, 2002
Michael Andrew Parker, Fremont, CA (US);
Robert Otto Schwenker, San Jose, CA (US);
Michael Andrew Parker, Fremont, CA (US);
Robert Otto Schwenker, San Jose, CA (US);
Hitachi Global Storage Technologies Netherlands, B.V., Amsterdam, NL;
Abstract
The invention is a laminated antiferromagnetically coupled (AFC) structure for use in a spin valve (SV) sensor or magnetic tunnel junction (MTJ) device, having two ferromagnetic films coupled together with an improved AFC film. Particularly the AFC film comprises an alloy material selected from the group consisting of Rum, Osm, Irm, Rh,m, Rem, and Mm, where M is an alloy of two or more materials selected from the group consisting of Ru, Os, Ir, Rh, and Re, and where m is a material selected from the group consisting of W, Ta, Mo, Nb and alloys of two or more materials selected from W, Ta, Mo, and Nb, and where x is between approximately 5 and 95 at. %, y is between approximately 10 and 90 at. %, and z is between approximately 25 and 75 at. %. The sensors may be used in magnetic heads of hard disk drives.