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:
Oct. 17, 2000
Filed:
Aug. 21, 1998
Mike Yu Chang, Sunnyvale, CA (US);
Mark Anthony Church, Los Gatos, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A strip of baked photoresist is employed for defining the zero throat height (ZTH) of a write head portion of a merged head. The zero throat height is the location where first and second pole pieces of the write head first commence to separate after an air bearing surface (ABS) of the write head for reducing flux leakage therebetween. A read head portion of the merged head includes a read sensor that has a recessed edge. The recessed edge defines a stripe height of the read head. The stripe height, which is the distance between the ABS and the recessed edge, establishes the magnetics of the read head. The present invention more accurately positions the ZTH with improved predictability relative to the stripe height since there is minimal shrinkage of the photoresist strip during a baking step. Further the photoresist strip has a desirable apex angle at its front ZTH defining edge for minimizing flux leakage between the pole pieces.