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IRG I: Addressable 4 Teradot/in2 Patterned Media

Innovative approach using block copolymers creates stable, addressable dot arrays for high-density patterned magnetic media with enhanced resolution. Ideal for fabricating patterned media with ultra-high densities. Developed by Seagate researchers.

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IRG I: Addressable 4 Teradot/in2 Patterned Media

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  1. The directed self-assembled dot arrays with an areal density of 1.3-3.8 Teradot/in2 can be easily achieved with a resolution enhancement of at least a factor of 4. These arrays are at thermodynamic equilibrium, not kinetically trapped, and as such are stable. This approach has immediate application in fabricating patterned media. IRG I. A Novel Approach to Addressable 4 Teradot/in2 Patterned media State-of-the-art top-down patterning methods are not sufficient for the fabrication of ultrahigh-density patterned magnetic media, which requires a lithographic resolution beyond 1 Teradot/in2. Bottom-up technologies utilizing self-assembling materials, like block copolymers (BCPs), on the other hand, must meet two major challenges to generate addressable arrays for patterned media: (1) addressability over arbitrarily large areas, and (2) resolution into the 1-2 Teradot/in2 or sub-10 nm half pitch regimes. By combining BCPs in the strong segregation limit having spherical microdomains with chemically nanopatterned surfaces without neutral surface pre-treatment, we show that directed self-assembled addressable dot arrays with an areal density of 1.3-3.8 Teradot/in2 can be easily achieved with a resolution enhancement of at least a factor of 4. These arrays are at thermodynamic equilibrium, not kinetically trapped, and as such are stable. This approach has immediate application in fabricating patterned media with areal densities of 4 Teradot/in2 and can easily be extended to much higher densities. (Soojin Park, Thomas P. Russell , Shuaigang Xiao, XiaoMin Yang, Dieter Weller (Seagate))

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