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<p>We have a Denton electron beam deposition system for doing Cr/Au
and most users want 5 nm Cr/ 100 nm Au. It has a Telemark 6kV
supply.<br>
</p>
<p>We were using a carbon crucible for gold, but it it looked like
we were getting carbon contamination so I switch to a tungsten
crucible (7 cc). This seemed to be going well, except we are now
having to increase the beam current after each run to melt the
gold and to get the same rate. I have changed the filament and
there was no improvement. I put in some more gold, but that seems
to have made is worse. Could I have over filled the crucible so
there is too much mass to melt? All the other materials we have
seem to not have changed and it was only the gold we change the
crucible to.</p>
<p>I am very tempted to order a new crucible or find away of getting
the gold out of the W crucible to reduce the mass.<br>
</p>
<p>Chito Kendrick<br>
</p>
<div class="moz-signature">-- <br>
<a href="https://sites.google.com/site/chitokendrickphd/">Chito
Kendrick Ph.D.</a><br>
<br>
Managing Director of the Microfabrication Facility<br>
Research Assistant Professor<br>
Electrical and Computer Engineering<br>
Michigan Technological University<br>
Room 436 M&M Building<br>
1400 Townsend Dr.<br>
Houghton, Michigan 49931-1295<br>
<br>
814-308-4255<br>
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