Directed self-assembly of block copolymers for use in bit patterned media fabrication

Griffiths, Rhys and Williams, Aled and Oakland, Chloë and Roberts, Jonny and Vijayaraghavan, Aravind and Thomson, Thomas (2013) Directed self-assembly of block copolymers for use in bit patterned media fabrication. Journal of Physics D: Applied Physics, 46 (50). ISSN 0022-3727

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Abstract

Reduction of the bit size in conventional magnetic recording media is becoming increasingly difficult due to the superparamagnetic limit. Bit patterned media (BPM) has been proposed as a replacement technology as it will enable hard disk areal densities to increase past 1 Tb in−2. Block copolymer directed self-assembly (BCP DSA) is the leading candidate for forming BPM due to its ability to create uniform patterns over macroscopic areas. Here we review the latest research into two different BCP DSA techniques: graphoepitaxy and chemoepitaxy (or chemical prepatterning). In addition to assessing their potential for forming high density bit patterns, we also review current approaches using these techniques for forming servo patterns, which are required for hard disk drive (HDD) operation. Finally, we review the current state of UV nanoimprint lithography, which is the favoured technique for enabling mass production of BPM HDDs.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Physics D: Applied Physics
Additional Information:
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
79042
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Deposited On:
12 Apr 2016 08:30
Refereed?:
Yes
Published?:
Published
Last Modified:
25 Oct 2020 03:59