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March 13, 2011

Mtg: Fabricating Bit-Patterned Media by Block Copolymer-Directed Assembly

by @ 4:04 pm. Filed under ALL, Computers/Software, Electronics Design, NanoEngineering

TUESDAY March 15, 2011
SCV Magnetics Chapter
Speaker: Dr. Ricardo Ruiz, HGST, Inc.
Time: Conversation & Pizza at 7:00 PM; Presentation at 7:30 PM
Cost: none
Place: Western Digital, 1710 Automation Parkway, San Jose
RSVP: not required

With the demonstration of feature density multiplication by directed self assembly, block copolymer templates stand as one of the most promising routes to fabricating templates for thermally stable magnetic recording media at densities beyond 1Tbit/in2 (below 25nm full-pitch). Nanofabrication challenges in magnetic bit patterned media (BPM), however, reach far beyond pattern formation. I will review recent progress at Hitachi GST in all aspects involving template nanofabrication by directed assembly. These include control over feature size uniformity, bit shape, placement accuracy, metrology, distorted lattices on circular tracks, high fidelity pattern transfer, magnetic BPM fabrication and, more recently, the impact of bit size uniformity on the magnetic switching field distribution. In all these aspects, the high uniformity of block copolymer patterns outperforms that of e-beam lithography alone bringing an exciting opportunity for self-assembly in time for bit patterned media technology.

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