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:
Aug. 15, 2000
Filed:
Apr. 10, 1998
Hugo Alberto Santini, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An inductive magnetic head is provided which has a zero throat height (ZTH) defining insulation layer that is located entirely between the air bearing surface (ABS) and a coil layer of the head. The ZTH defining insulation layer has a front end which defines the zero throat height (ZTH) of the head. An insulation stack, with one or more coil layers embedded therein, is located between the ZTH defining insulation layer and a back gap where first and second pole pieces are connected. The insulation stack has a first insulation layer that has a thickness that is less than the thickness of the ZTH defining insulation layer so that the final stack has less height than previous insulation stacks. The lower stack permits the construction of a second pole piece pole tip portion with improved side wall definition. This is due to the fact that the photoresist layer used for frame plating the second pole piece will have less thickness in the pole tip region allowing improved light patterning penetration and a better resist frame prior to plating the second pole piece.