Servo-Integrated Patterned Media by Hybrid Directed Self-Assembly

Xiao, Shuaigang; Yang, XiaoMin; Steiner, Philip; Hsu, Yautzong; Lee, Kyung Hwa; Wago, K.; Kuo, David

doi:10.1021/nn505630t

Cited by 24 publications

(22 citation statements)

References 29 publications

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“…There has been an increasing interest in preparing block copolymers (BCPs) thin films having lamellar microdomains oriented normal to the surface where the repeat period is small so as to achieve high areal densities . Such materials would find broad application as templates for the fabrication of ultrahigh areal density nanowires, bit‐patterned media (BPM), and graphene nanotransistors . To obtain ultrasmall repeat periods, a large Flory–Huggins segmental interaction parameter ( χ ) is necessary to maintain a microphase separated morphology at low molecular weights.…”

mentioning

confidence: 99%

Directed Self‐Assembly of Poly(2‐vinylpyridine)‐b‐polystyrene‐b‐poly(2‐vinylpyridine) Triblock Copolymer with Sub‐15 nm Spacing Line Patterns Using a Nanoimprinted Photoresist Template

et al. 2015

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Low molecular weight P2VP-b-PS-b-P2VP triblock copolymer (poly(2-vinlypyridine)-block-polystyrene-block-poly(2-vinylpyridine)] is doped with copper chloride and microphase separated into lamellar line patterns with ultrahigh area density. Salt-doped P2VP-b-PS-b-P2VP triblock copolymer is self-assembled on the top of the nanoimprinted photoresist template, and metallic nanowires with long-range ordering are prepared with platinum-salt infiltration and plasma etching.

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confidence: 99%

Directed Self‐Assembly of Poly(2‐vinylpyridine)‐b‐polystyrene‐b‐poly(2‐vinylpyridine) Triblock Copolymer with Sub‐15 nm Spacing Line Patterns Using a Nanoimprinted Photoresist Template

et al. 2015

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“…(10) These effective jitters are dominated by the magnetic switching field distribution component of Eq. (9). We estimate that the effective write field gradients are 300 Oe/nm downtrack and 150 Oe/nm cross-track and the island switching field distribution is measured to be 540 Oe.…”

Section: Recording Performance Discussionmentioning

confidence: 86%

2-D Decoding Algorithms and Recording Techniques for Bit Patterned Media Feasibility Demonstrations

et al. 2016

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Recording experiments and decoding algorithms are presented for evaluating the bit-error-rate of state-of-the-art magnetic bitpatterned media. The recording experiments are performed with a static tester and conventional hard-disk-drive heads. As the reader dimensions are larger than the bit dimensions in both the down-track and the cross-track directions, a two-dimensional bit decoding algorithm is required. Two such algorithms are presented in details together with the methodology implemented to accurately retrieve island positions during recording. Using these techniques, a 1.6 Td/in 2 magnetic bit pattern media is demonstrated to support 2D bit error rates below 1e-2 under shingled magnetic recording conditions.

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“…While critical feasibility milestones were demonstrated such as integration with aperiodic servo patterns 29 and magnetic recording demonstrations 19,30 at densities ranging from 1-2 Tdot/in 2 (Figure 1d-e), other challenges loomed large for BPM technology. Ultimately, the lithographic difficulties to fabricate skinnier, longer bit cells with higher aspect ratios 19 to boost drive performance, integration challenges, cost pressures, a shifting market landscape, and the advent of other technologies such as three-dimensional flash and heatassisted magnetic recording 31 all contributed to deprioritization of BPM.…”

Section: For Magnetic Recording Devicesmentioning

confidence: 99%