title: Fabrication and MFM study of 60 nm track-pitch discrete track media.
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.
authors.affiliation: Samsung Advanced Institute of Technology, Yongin-si, Gyeonggi-do, Korea. sohn@samsung.com
authors.forename: Jin-Seung
authors.initials: JS
authors.lastname: Sohn
authors.forename: Duhyun
authors.initials: D
authors.lastname: Lee
authors.forename: Eunhyoung
authors.initials: E
authors.lastname: Cho
authors.forename: Hae-Sung
authors.initials: HS
authors.lastname: Kim
authors.forename: SangChul
authors.initials: S
authors.lastname: Sul
authors.forename: Byung-Kyu
authors.initials: BK
authors.lastname: Lee
authors.forename: MyungBok
authors.initials: M
authors.lastname: Lee
authors.forename: Changyoul
authors.initials: C
authors.lastname: Moon
authors.forename: No-Cheol
authors.initials: NC
authors.lastname: Park