On Tue, Nov 02, 2010 at 08:49:34PM -0400, Peter St. John wrote: > deBeers laser-engraves serial numbers onto their (natural) diamonds (to > counter the increasing gem quality of artificial diamonds made by, say, > chemical vapor deposition). So how about laser engraving data onto cheap > chemical vapor deposition thin diamond slices? (One of the ideas had been to > make microelectronics substrates from diamond this way, since diamond > conducts heat better than silicon).
There's a variant of microfiches which uses photoglass. Areas exposed to light produce crystal nuclei. The glass is heated close to Tg at which stage those nuclei initiate crystal growth. Should have lots longer shelf half life than mere microfiches which are good for about century or more under optimal storage conditions. -- Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
