Fabrication and MFM study of 60 nm track-pitch discrete track media |
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Authors: | Sohn Jin-Seung Lee Duhyun Cho Eunhyoung Kim Hae-Sung Sul SangChul Lee Byung-Kyu Lee MyungBok Moon Changyoul Park No-Cheol |
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Affiliation: | Samsung Advanced Institute of Technology, Yongin-si, Gyeonggi-do, Korea. sohn@samsung.com |
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Abstract: | Discrete track magnetic recording media with a 60 nm track pitch and prewritten servo patterns were fabricated and tested for read/write performance, and a feasibility analysis of the embedded servo was performed. The fabrication process consisted of ultraviolet nanoimprint lithography (UV-NIL) and sequential ion beam etching on a conventional perpendicular magnetic recording medium. Magnetic patterns were written to the fabricated tracks at 700 kilo flux changes per inch (kFCI) using a spin stand and were read using magnetic force microscopy (MFM), with a resulting signal-to-noise ratio (SNR) of 12.15 dB. The servo pattern was also visualized with MFM. These results demonstrated the feasibility of writing to a 30 nm wide discrete data track and the workability of the embedded servo pattern. |
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