Re: RF Conductivity of thin Mo film

Peter Simon wrote:
> 
> "Uncle Al" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]

[snip]

> > The simple (riiight) solution is to have a film periodically pulled
> > across betwen the source and the deposition target.  The crud deposits
> > on the film and is moved away; the aperture stays clean.  Mylar is
> > fragile in a bunch of ways, but poly(ethylene naphthalate) is much
> > better and Kapton much better still.  Now you can sweat the MTBF of
> > the film and its transport mechanism.
> 
> That's a very interesting suggestion, which I will transmit to my coworkers.

When you need research in the worst way possible - Uncle Al's way.

> Thanks for the constructive thoughts,

"8^>)  

http://www.dupont.com/kapton/
 Kapton HN ought to do it.
http://www.dupont.com/kapton/products/H-38497-1.html

http://www.scpscience.com/products/XRF/thinfilm.asp
http://www.cshyde.com/Films.htm
 Long rolls of thin films are off the shelf.

<http://www.grc.nasa.gov/WWW/RT2000/5000/5480dever.html>
<http://techreports.larc.nasa.gov/ltrs/refer/1996/LDEF/TrayF9.html>
<http://techreports.larc.nasa.gov/ltrs/PDF/2003/cr/NASA-2003-cr212422.pdf>
 Kapton survives a lot of grief in orbit, but it isn't immortal.

Think about 6-8 micron (0.3 mil) Kapton HN.  It should survive to 300+
C, though it will be eroded by atomic oxygen.  Just about everything
else is eaten by 100 C.  Kapton doesn't like alkali.  U2 cameras were
beautiful examples of long roll (more than a mile) precision thin film
handling.

-- 
Uncle Al
http://www.mazepath.com/uncleal/
 (Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?"  The Net!