High-speed rewritable DVD up to 20 m/s with nucleation-free eutectic phase-change material of Ge(Sb70Te30)+Sb

Michikazu Horie; Natsuko Nobukuni; Kenjirou Kiyono; Takashi Ohno

doi:10.1117/12.399373

18 September 2000 High-speed rewritable DVD up to 20 m/s with nucleation-free eutectic phase-change material of Ge(Sb₇₀Te₃₀)+Sb

Michikazu Horie, Natsuko Nobukuni, Kenjirou Kiyono, Takashi Ohno

Author Affiliations +

Proceedings Volume 4090, Optical Data Storage 2000; (2000) https://doi.org/10.1117/12.399373
Event: Optical Data Storage, 2000, Whistler, BC, Canada

Abstract

High speed overwriting capability of the nucleation-free and growth-dominant eutectic Ge(Sb₇₀Te₃₀)+Sb phase- change material, and its application to high speed overwritable DVD and CD, are discussed. The addition of Ge to Sb₇₀Te₃₀+Sb binary system could effectively suppress the nucleation in recrystallization process, while high Sb/Te ratio could realize a selective enhancement of crystalline growth-speed initiated from the boundary of an amorphous mark and its crystalline background. This resolved a trade-off in high speed erasure and archival stability of amorphous marks. Highly enhanced crystalline growth also caused serious recrystallization during amorphous mark formation, resulting in shrinkage of amorphous mark size (premature cooling issue). This premature cooling issue as well as premature heating issue, in multiple pulse strategy with such a short writing and cooling pulse as below 10 nsec at high clock frequency of > 100 MHz for over 4X speed rewritable DVD, were resolved with a 2T-period based multiple pulse strategy. Thus, feasibility of 2 - 4.8X CAV operatable rewritable DVD and 16X CD-RW was demonstrated.

Citation Download Citation

Michikazu Horie, Natsuko Nobukuni, Kenjirou Kiyono, and Takashi Ohno "High-speed rewritable DVD up to 20 m/s with nucleation-free eutectic phase-change material of Ge(Sb₇₀Te₃₀)+Sb", Proc. SPIE 4090, Optical Data Storage 2000, (18 September 2000); https://doi.org/10.1117/12.399373

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available