Optical Data Storage.pdf

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Optical Data Storage
Philips Research
VOLUME 4
Dr. Frank Toolenaar
Philips Research Laboratories, Eindhoven, The Netherlands
Editor-in-Chief
SCOPE TO THE
‘PHILIPS RESEARCH BOOK SERIES’
As one of the largest private sector research establishments in the world, Philips
Research is shaping the future with technology inventions that meet peoples’ needs and
desires in the digital age. While the ultimate user benefits of these inventions end up
on the high-street shelves, the often pioneering scientific and technological basis
usually remains less visible.
This ‘Philips Research Book Series’ has been set up as a way for Philips researchers
to contribute to the scientific community by publishing their comprehensive results and
theories in book form.
Dr. Rick Harwig
Optical Data Storage
Phase-Change Media and Recording
By
Erwin R. Meinders
Philips Optical Media & Technology, Eindhoven, The Netherlands
Andrei V. Mijiritskii
Philips Lighting, Business Unit Automotive Lighting, Eindhoven,
The Netherlands
Liesbeth van Pieterson
Philips Research, Eindhoven, The Netherlands
and
Matthias Wuttig
I. Physikalisches Institut, RWTH Aachen, University, Aachen, Germany
A C.I.P. Catalogue record for this book is available from the Library of Congress.
ISBN-10
ISBN-13
ISBN-10
ISBN-13
1-4020-4216-7 (HB)
978-1-4020-4216-4 (HB)
1-4020-4217-5 (e-book)
978-1-4020-4217-1 (e-book)
Published by Springer,
P.O. Box 17, 3300 AA Dordrecht, The Netherlands.
www.springer.com
Printed on acid-free paper
All Rights Reserved
© 2006 Springer
No part of this work may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, microfilming,
recording or otherwise, without written permission from the Publisher,
with the exception of any material supplied specifically for the purpose of
being entered and executed on a computer system, for exclusive use
by the purchaser of the work.
Contents
1.
Introduction.......................................................................................................1
1.1.
1.2.
A brief overview of optical storage systems ............................................1
The basics of optical storage....................................................................3
1.2.1.
1.2.2.
1.2.3.
1.2.4.
1.2.5.
1.3.
1.4.
2.
Optical drive layout ...................................................................3
Basic principles of optical data storage......................................4
Optical storage roadmap ..........................................................15
Optical media...........................................................................16
Phase-change media.................................................................18
Scope of this book..................................................................................20
References Chapter 1 .............................................................................21
Theoretical aspects of phase-change alloys ...................................................23
2.1.
2.2.
2.3.
Introduction............................................................................................23
Glass formation and the amorphous phase.............................................26
Crystallization........................................................................................30
2.3.1.
2.3.2.
2.4.
Crystallization theory............................................................... 30
Crystallization of amorphous marks in a phase-change
disc .......................................................................................... 32
Classes of phase-change materials .........................................................34
2.4.1.
2.4.2.
2.5.
2.6.
Class I: Crystallization by nucleation and growth ...................35
Class II: Crystallization dominated by crystal growth .............38
Emerging directions in phase-change research ......................................40
References of chapter 2..........................................................................46
3.
Thermal modelling of phase-change recording ............................................51
3.1.
Multi-layer thermal model .....................................................................51
3.1.1.
3.1.2.
3.1.3.
3.1.4.
3.2.
3.2.1.
3.2.2.
Heat diffusion in thin layers.....................................................51
Heat conduction at microscale .................................................52
Modelling of heat diffusion in multi-layer recording stacks....53
Mark-formation and erasure model..........................................56
Optical properties of thin films ................................................59
Stack design .............................................................................63
v
Optical parameters of phase-change recording films .............................58

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