Fabrication of nanodot array mold with 2 Tdot/in.2 for nanoimprint using metallic glass

Yasuyuki Fukuda, Yasunori Saotome, Nobuyuki Nishiyama, Kana Takenaka, Noriko Saidoh, Eiichi Makabe, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Here, the authors fabricated a mold consisting of nanodot arrays with an 18-nm pitch and performed nanoimprinting of metallic glass for developing bitpatterned media (BPM) with an areal recording density of 2 Tbit/in. 2. Specifically, they investigated the feasibility of SiO 2/Si mold fabrication by metal mask patterning with focused ion beam assisted chemical vapor deposition (FIB-CVD) and reactive ion etching (RIE). SiO2 was etched with a mixed gas of CHF3 and O 2, resulting in successful fabrication of convex nanodot arrays with an 18-nm pitch. The authors attempted nanoimprinting of Pd-based metallic glass with the fabricated SiO2 mold and clearly confirmed the replication of the fine nanohole pattern. These results suggest that the proposed FIB-CVD and RIE process is a promising method for fabricating ultrafine nanodot arrays and that metallic glasses are excellent nanoimprintable materials for mass-produced nanodevices such as BPM with ultrahigh recording density.

Original languageEnglish
Article number061602
JournalJournal of Vacuum Science and Technology B
Issue number6
Publication statusPublished - 2012 Nov


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