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:
Mar. 09, 1999
Filed:
Oct. 21, 1996
Edward Hinpong Lee, San Jose, CA (US);
Peter Beverley Phipps, Saratoga, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The reconfiguration of a magnetic write head minimizes cracking at the ABS. This is accomplished by selectively reconfiguring the front edge of the insulation layer that defines the zero throat height (ZTH) so as to increase the volume of the overcoat layer which interfaces with the reconfigured edge. The front edge of the ZTH-defining insulation layer has a central portion which is centered with respect to the second pole tip and first and second lateral portions which are on each side of the front portion and parallel to the ABS. The front edge portion is recessed from the ABS a distance appropriate for defining the ZTH between the first and second pole pieces of the write head. The first and second lateral edges are further recessed into the head so as to increase the volume of the overcoat layer between the ABS and the first and second lateral edges. The increased volume of the overcoat layer better absorbs stresses and strains due to shock loading and temperature so as to reduce cracking of the head at the ABS.