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. 21, 2014
Filed:
Jul. 31, 2012
Guoqiang Zheng, San Ramon, CA (US);
Wan Ting Looi, Hong Kong, HK;
Kwun Pan NG, Hong Kong, HK;
Ellis Cha, San Ramon, CA (US);
Guoqiang Zheng, San Ramon, CA (US);
Wan Ting Looi, Hong Kong, HK;
Kwun Pan Ng, Hong Kong, HK;
Ellis Cha, San Ramon, CA (US);
SAE Magnetics (HK) Ltd., Shatin, N.T., HK;
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A DFH (Dynamic Flying Height) type slider ABS design has significantly improved DFH efficiency and back-off efficiency as well as uniform touchdown detectability. This is the result of decoupling the local pressure variations at the read/write head that result from skew angle variations across a disk, from local stiffness due to ABS protrusion caused by heater activation. The decoupling, which allows the heater activation stiffness to be carefully tuned, is a result of the effects of airflow channeled by a wide down-track channel onto a narrow down-track channel formed in an extended finger of the central pad of the slider. Airflow impinges on the finger channel in a manner that eliminates variations in air pressure at the central pad due to variations in skew angle.