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:
Nov. 05, 1996
Filed:
Feb. 06, 1992
Applicant:
Inventors:
Harold B Shukovsky, Framingham, MA (US);
Michelle Martin, Westford, MA (US);
Michael Mallary, Berlin, MA (US);
Alan L Sidman, Wellesley, MA (US);
Assignee:
Quantum Corporation, Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
427531 ; 2041922 ; 204471 ; 427128 ; 427130 ; 427132 ; 427250 ; 427294 ; 4273741 ; 4273831 ; 4274301 ; 427547 ; 427599 ; 205149 ; 205259 ;
Abstract
A process resulting in enhanced pole performance, relative to permalloy poles, in narrow track magnetic devices. A preferred process includes increasing the anisotropy field of the pole material while maintaining an acceptable coercivity level and near zero magnetostriction. One embodiment utilizes a NiCoFe alloy containing 22% cobalt by weight, heat treated in an easy axis magnetic field in a non-oxidizing atmosphere. This process achieves favorable domain structures at narrow pole tip widths.