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Proceedings Paper

Tribological and micro-optical characteristics of a minute aperture mounted miniaturized optical head slider
Author(s): Toshifumi Ohkubo; Masakazu Hirata; Manabu Oumi; Kunio Nakajima; Terunao Hirota
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Paper Abstract

Recent rapid progress in a digital network society necessitates storage devices with higher-density and faster transfer rates. In optical storage, a novel recording principle is eagerly awaited that will drastically improve recording density without being restricted by a wavelength shortening limit or a numerical aperture (N.A.) limit of the optics utilized. Storage based on the "near-field" principle is thought to be one of the most promising breakthroughs for overcoming various tough limitations governing traditional optical recording. From this perspective, we have already proposed an integrated optical head slider assembly that relies on the novel near-field principle for its operation; it is mounted on a minute tapered aperture and has a planar focusing lens and a micro silicon mirror. Readout signals corresponding to a 200-nm-long bit have demonstrated a frequency band up to approximately 10 MHz, using a chromium patterned medium. In this study, we have investigated a tribological (glide height) property and flying stability of a miniaturized 1.5-mm-long optical head slider by using acoustic emission sensor signal and readout signal from the medium. We have also evaluated detecting performance separately using traditional 3.2-mm-long slider and a chromium patterned medium whose bit patterns are accurately scored with bit lengths less than 100 nm using electron beam lithography including reactive ion etching. We have confirmed stable flying performance of 1.5-mm-long slider assembly and furthermore, ability of detecting sub-100-nm long bit patterns.

Paper Details

Date Published: 5 December 2005
PDF: 8 pages
Proc. SPIE 6050, Optomechatronic Micro/Nano Devices and Components, 60500C (5 December 2005); doi: 10.1117/12.648823
Show Author Affiliations
Toshifumi Ohkubo, Toyo Univ. (Japan)
Masakazu Hirata, Seiko Instruments Inc. (Japan)
Manabu Oumi, Seiko Instruments Inc. (Japan)
Kunio Nakajima, Seiko Instruments Inc. (Japan)
Terunao Hirota, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 6050:
Optomechatronic Micro/Nano Devices and Components
Yoshitada Katagiri, Editor(s)

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