Jpn. J. Appl. Phys. 45 (2006) pp. 1235-1238  |Previous Article| |Next Article|  |Table of Contents|
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Layer-Selection-Type Recordable Optical Disk with Inorganic Electrochromic Film

Akemi Hirotsune, Masaki Mukoh and Motoyasu Terao

Central Research Laboratory, Hitachi Ltd., 1-280 Higashi-Koigakubo, Kokubunji, Tokyo 185-8601, Japan

(Received July 28, 2005; accepted September 28, 2005; published online February 24, 2006)

We have introduced a tungsten oxide film to a layer-selection-type recordable optical disk (LS-R) as an inorganic electrochromic (EC) film. The EC film showed a large transmittance change in a wide wavelength range. Layer selection was demonstrated with a dual-layer disk whose spacing was 0.3 µm, and the capacity of a 20-layer LS-R was estimated to be 1 TB.

DOI: 10.1143/JJAP.45.1235
KEYWORDS:large capacity, multilayer, layer selection, 1 TB/disk

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