Datadobi

WD Media Assigned Three Patents

HAMR medium, NiFeX-based seed layer for magnetic recording media, HDD double lubrication layer
By Francis Pelletier on 2017.07.20

AddThis Social Bookmark Button

Heat-assisted magnetic recording medium
WD Media, LLC, San Jose, CA, has been assigned a patent (9,697,859) developed by Tripathy, Debashish, San Jose, CA, Srinivasan, Kumar, Redwood City, CA, and Ajan, Antony, San Jose, CA, for a "heat-assisted magnetic recording, (HAMR) medium including a bi-layer that enables use of lower laser current in write operations."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A heat-assisted magnetic recording, (HAMR) medium includes a substrate, a bi-layer, a heat-sink layer, and a magnetic-recording layer. The bi-layer includes a seed layer disposed on the substrate, and a thermal-transport-control layer, (TTCL) disposed on seed layer. The heat-sink layer is disposed on the TTCL, and the magnetic-recording layer is disposed on the heat-sink layer. The bi-layer is configured to enable use of a 50% thinner heat-sink layer that allows use of a reduced operating current of a laser in HAMR write operations while maintaining about the same write performance parameters as a HAMR medium that includes a thermal-barrier layer, (TBL) and twice as thick heat-sink layer. A HAMR data-storage device that incorporates the HAMR medium within a HAMR disk, and a method for making the HAMR medium are also described."

The patent application was filed on April 1, 2016 (15/089,145).

NiFeX-based seed layer for magnetic recording media
WD Media, LLC, San Jose, CA, has been assigned a patent (9,685,184) developed by Srinivasan, Kumar, San Mateo, CA, Li, Tuqiang, and Desai, Mrugesh, San Jose, CA, for a "NiFeX-based seed layer for magnetic recording media."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A recording medium having improved signal-to-noise ratio (SNR) capabilities includes a NiFeX-based magnetic seed layer over a soft magnetic underlayer, where X comprises an element that is soluble in and has a higher melting point than Ni. X may be selected from a group of elements, including ruthenium (Ru), which may facilitate growth of smaller grains and distributions in the corresponding magnetic recording layer(s)."

The patent application was filed on September 25, 2014 (14/497,299).

Hard disk double lubrication layer
WD Media, LLC, San Jose, CA, has been assigned a patent (9,607,646) developed by Sakane, Yasuo, Lai, Kim Thuy Thi, San Jose, CA, Chen, Shaun H., Cupertino, CA, and Chang, Bing-Shiuan, San Jose, CA, for a "hard disk double lubrication layer."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "Systems and methods are illustrated for manufacturing hard disks with double lubrication layers that allow minimization of a HDD head DFH touchdown point while maintaining good tribology performance for HDD reliability. An exemplary hard disk includes a magnetic recording layer, a carbon overcoat, and a double lubrication layer: a bonded lubrication layer and a mobile lubrication layer. The bonded lubrication layer includes a high conformity and high density first lubricant. The mobile layer include a high lubricity lubricant that promotes HDI reliability."

The patent application was filed on March 4, 2014 (14/196,760).

Articles_bottom