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:
May. 01, 2012
Filed:
Apr. 02, 2010
Charles Mathew Mate, San Jose, CA (US);
Franck Dreyfus Rose, San Jose, CA (US);
Kurt Allan Rubin, San Jose, CA (US);
Steven Gary Schmid, San Jose, CA (US);
Tushar Keshubhai Suther, Milpitas, CA (US);
Charles Mathew Mate, San Jose, CA (US);
Franck Dreyfus Rose, San Jose, CA (US);
Kurt Allan Rubin, San Jose, CA (US);
Steven Gary Schmid, San Jose, CA (US);
Tushar Keshubhai Suther, Milpitas, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A magnetic recording disk with pre-patterned surface features of elevated lands and recessed grooves or trenches, like a discrete-track media (DTM) or bit-patterned media (BPM) disk, has a planarized surface. A multilayered disk overcoat is used to protect the recording layer, and at least one of the overcoat layers functions as a stop layer for terminating a chemical-mechanical polishing (CMP) process that substantially planarizes the disk. All of the layers of the multilayered overcoat are located above the lands, but none of the overcoat layers, or a number of layers less than the number of layers over the lands, is located above the recesses.