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. 17, 1990
Filed:
Sep. 27, 1988
Applicant:
Inventors:
Christopher H Bajorek, Rochester, MN (US);
Cheng T Horng, San Jose, CA (US);
Edward T Yen, San Jose, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G01R / ; H01L / ; H01F / ;
U.S. Cl.
CPC ...
360113 ; 29603 ; 324252 ; 338 / ;
Abstract
The method for making a shielded magnetoresistive (MR) sensor in which the first shield is made of sendust and the second shield is made of permalloy. The method comprises the stages of depositing a layer of sendust to form a first shield; heat treating the sendust layer at a temperature greater than 400.degree. C.; depositing a first electrically insulating layer; depositing, in the presence of a magnetic field, a MR layer; depositing a second layer of electrically insulating material; and, depositing a layer of permalloy to form the second shield.