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FYI

JAPANESE PACK 1TB OF MEMORY INTO CUBIC CENTIMETER

Posted at April 25, 2001 08:06 AM Pacific

WHEN BILL CLINTON spoke to students and administrators
at the California Institute of Technology in January
2000, the then-president talked of future
breakthroughs in technology that would lead to a
device the size of a lump of sugar which could hold
the contents of the U.S. Library of Congress. Now the
market debut of such a device may be in view in Japan,
a group of engineers and scientists from Kyoto
University and Central Glass said Tuesday.

Development of the next-generation memory is almost at
the point where the group, which holds patents on the
technology, can start working on its commercial
development, according to Professor Kazuyuki Hirao
from the department of material chemistry, Graduate
School of Engineering, at Kyoto University. Hirao said
such work would begin before the end of the year.


For the full story:
http://www.infoworld.com/articles/hn...e.xml?0425wepm

From InfoWorld.com <http://www.infoworld.com/>

Published at: Wednesday, Apr. 25, 2001 8:06 am PT
<<...OLE_Obj...>>
Japanese pack 1TB of memory into cubic centimeter
<<...OLE_Obj...>> By Kuriko Miyake <mailto:kuriko_miyake@idg.com>
<<...OLE_Obj...>>
WHEN BILL CLINTON spoke to students and administrators at the California
Institute of Technology in January 2000, the then-president talked of future
breakthroughs in technology that would lead to a device the size of a lump
of sugar which could hold the contents of the U.S. Library of Congress. Now
the market debut of such a device may be in view in Japan, a group of
engineers and scientists from Kyoto University and Central Glass said
Tuesday.
Development of the next-generation memory is almost at the point where the
group, which holds patents on the technology, can start working on its
commercial development, according to Professor Kazuyuki Hirao from the
department of material chemistry, Graduate School of Engineering, at Kyoto
University. Hirao said such work would begin before the end of the year.
About two years ago, the group discovered that when a very short pulse of
laser light produced by a femtosecond laser is applied to a piece of glass
containing the rare earth element samarium, the glass is transformed -- a
dot around 400 nanometers in diameter where the light hits becomes luminous
while the rest remains transparent. This difference allows the glass to be
used as an optical memory.
Luminous dots can be spaced 100 nanometers apart on a glass surface that
includes samarium, and now the group has confirmed that these dotted
surfaces can be layered. In their experiment they had the equivalent of
2,000 layers of dots in a cubic centimeter of glass and managed to store the
equivalent of 8Tb of data (8Tb is equivalent to 1TB or 1,000GB), according
to Shigeki Sakaguchi at the fine chemical business planning division of
Central Glass, a glass manufacturer.
"Until then, each layer could not be read as individual data. But by
irradiating with a femtosecond laser and changing the number of elements, we
discovered that it is possible," said Kyoto University's Hirao, who
specializes in the field of femtosecond lasers.
A femtosecond laser is a laser that irradiates for an extremely short period
of time -- one-1,000-trillionth of a second. The group discovered, five to
six years after it started the project in 1994, that such lasers are
required because longer pulses of light cause excessive heat.
"If a nanosecond or picosecond laser is applied on glass, the radiated heat
that occurs causes glass to crack. Only a femtosecond laser can irradiate
without heat," Hirao said.
Hirao said femtosecond lasers are the only laser that can cut a molecule.
Using a femtosecond laser, broadband communication technology that enables
transmission of terabits of data per second is possible, he said, talking of
another project he is working on.
Another three-dimensional medium, holographic memory, has been around for
more than 20 years; however the structure of holographic memory is so
complicated that it is not yet possible for it to be developed as a
practical memory device, according to Central Glass' Sakaguchi.
Kuriko Miyake <mailto:kuriko_miyake@idg.com>is a Tokyo correspondent for
the IDG News Service, an InfoWorld affiliate.

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[groverat]

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[Nacionalista]

I had heard of that technology, or similar too, since 1997.

You know, carrying that much information in a chip under your nails.

Maybe this one is smaller and had more capacity.

[IaBHOREgUNS]

Oops ok, u r guys also interested in resent tech, hope to share good infor! i registered here right now, seeya