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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Diamonds may be almost forever, <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>But I would think that fused silica would work almost as well,
and is substantially less expensive.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you want something exotic, how about ion implantation of Cr+ or
Ti+ ions into alumina<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>Jim Lux<br>
+1(818)354-2075 </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p></o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Peter St. John
[mailto:peter.st.john@gmail.com] <br>
<b>Sent:</b> Tuesday, November 02, 2010 5:50 PM<br>
<b>To:</b> Robert G. Brown<br>
<b>Cc:</b> Lux, Jim (337C); beowulf@beowulf.org<br>
<b>Subject:</b> Re: [Beowulf] Re: Interesting<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>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).<br>
Peter<o:p></o:p></p>
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