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Proceedings Paper

L/G recording with 0.45-μm track pitch in CAD-MSR disk
Author(s): Y. Murakami; Shunji Maeda; Akira Takahashi; Yasuhito Tanaka; Tetsu Watanabe
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Paper Abstract

A 6 GB user-capacity disk with a 120 mm-diameter single side substrate was realized by the use of a center aperture detection (CAD) type of magnetically induced super resolution (MSR) disk through the AS-MO (Advanced Storage Magneto Optical) activity. It utilized a practical optics which consists of a 640 nm wavelength laser and a 0.6 numerical aperture (NA) lens, and land and groove (L/G) recording with an effective track pitch of 0.6 pm was realized. The areal bit density reached to 4.6 Gbit/in2 with available system margins. In this report, we present improved CADMSR performance at narrower pitch tracks and at higher linear density with the same optics.

Paper Details

Date Published: 28 June 1999
PDF: 3 pages
Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 38640M (28 June 1999); doi: 10.1117/12.997565
Show Author Affiliations
Y. Murakami, Sharp Corp. (Japan)
Shunji Maeda, Sharp Corp. (Japan)
Akira Takahashi, Sharp Corp. (Japan)
Yasuhito Tanaka, Sony Corp. (Japan)
Tetsu Watanabe, Sony Corp. (Japan)


Published in SPIE Proceedings Vol. 3864:
Joint International Symposium on Optical Memory and Optical Data Storage 1999
Shigeo R. Kubota; Ryuichi Katayama; Douglas G. Stinson, Editor(s)

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