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. 18, 2020
Filed:
Dec. 04, 2019
Western Digital Technologies, Inc., San Jose, CA (US);
Cherngye Hwang, San Jose, CA (US);
Randall George Simmons, San Jose, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
A magnetic recording disk drive head carrier or slider has a contact pad that protects the disk drive's write pole during touchdown of the slider with the disk. The contact pad is located in a window region of the slider's disk-facing surface that includes the write pole end. The contact pad includes a layer of silicon that surrounds the write pole end but does not cover it. The silicon does not cover the write pole end because it has diffused into the ferromagnetic material of the write pole end. This removes the silicon over the write pole end. The contact pad includes a protective overcoat on the silicon-containing write pole end and surrounding silicon layer. The protective overcoat thus has a recess over the write pole due to the absence of silicon, so that the protective overcoat surrounding the recess provides protection to the recessed write pole end during touchdown.