Hello: I am very interested in doing a flash evaporation of as received- Mg2Si. However, when i carried out the flash evaporation, the Mg2Si decomposes into Mg...
Jose
xoarfer@...
Aug 1, 2006 2:53 pm
3309
Dear All I would be extremely grateful if I get guidelines for preparing the sample for XTEM of 2 micron thick TiN film. Thanks Vikas...
Hi there. I amnot sure what is the current (I) capacity of your evaporation system. You can try with Alumina coated tungsten filaments for your flash...
Pandurang Ashrit
ashritp@...
Aug 2, 2006 2:56 pm
3311
Hi Loretta, In response to your email to Dave, you were refering to four point probe to measure the thickness by sheet resistance measurement. I have a...
Dear All, I have an Arc cathode system from Hauzer. We have made CrN and CrON (Oxygen in the solid solution, higher hardness and lower Modulus of elasticity...
Hi, well, in a short way, if the chamber isn't very large it's best to inject the reactive gas close to the susbtrate, where the reaction takes place, and the...
Hello all I am trying to analyse a leak in my chamber using an RGA to evaluate the partial pressures change while performing a pressure rise test. The big...
Hi Chee, Yes, I was speaking of a 4-pt probe, you are right. In your case, assuming "ideal" Cu resistivity of 1.7 micro-ohm-cm in your thin film, you would...
hello Gary, as i remeber it right, the fluorination increase surface energy and thus wettability. to decrease the surface energy, you can try polymerization of...
Hi, Does anybody know how to deposit really black thin films consisting of metal compounds (like nitride, oxide, carbide, etc.)? The color should be as black...
Flashing an alumina coated W filament is not a good idea. The alumina is a ceramic and will crack immediately (if flashed). Although, an alumina coated boat...
We have had very good success with the depositions of WO3, MoO3 and their composite film deposition on Alumina coated W boats by flash evaporation. However, I...
Pandurang Ashrit
ashritp@...
Aug 4, 2006 1:07 pm
3320
Sounds like an air leak to me. Water is notoriously difficult to remove from a vacuum chamber without specifically cryopumping it and of course there is lots...
Martyn Pemble
martyn.pemble@...
Aug 4, 2006 1:08 pm
3321
A simple way to determine if you have a water leak is to blow out the water lines and back fill the lines with 10 20 pounds of pressure of Argon. A virtual...
Gagnon, Paul E
gagnonpe@...
Aug 4, 2006 1:09 pm
3322
Dear Frank "Acktar ltd." specialises in black coatings including ones consisting of metal compounds. The colour is as black as it gets and with additional...
Dear Frank, Try depositing of stoichiometric Al67Ti33N. The colour is really black, esspecially if use vacuum arc deposition. Best regards, Milko Angelov Milko...
Dear Frank, the National Physical Laboratory in the UK have a patented process for depositing black coatings which they are happy to licence. I am sure you...
Charles A Bishop
cabishopconsulting@...
Aug 8, 2006 10:15 pm
3325
Daniel, There are a number of things we would need to know to make a remote determination of your problem. First, what is your base pressure? Is it HV or UHV?...
dallgeyer@...
Aug 8, 2006 10:15 pm
3326
Paul Gagnon 's argon flushing method is a definitive method of checking for leaks in your water lines. An easier yet less definitive method is to open and...
You are addressing several different issues. In order to check for a leak with an RGA, it is critical where in the chamber it is installed and at what pressure...
Hans Luedi
hluedi@...
Aug 8, 2006 10:15 pm
3328
Daniel, you mention that the vessel is a large metallizer made out of mild steel and painted. What you do not mention is the general state of the shielding...
Charles A Bishop
cabishopconsulting@...
Aug 8, 2006 10:16 pm
3329
I agree with Paul. Another option is to use helium to back fill the lines then put the RGA in leak test mode and see if helium is detected. If you in fact...
Hi Daniel, What are the ratios (while pumping) of Nitrogen to Oxygen? If approx. 4:1 N2:O2, even up to 6:1 N2:O2, after a good pumpdown, generally speaking I...
Dear researcher I am looking for a feasible method to coat my samples(nickel base) with a titanium layer(5 to 20 microne). PVD systems here can not coat more ...
hi daer firends I haveproject about pecvd system. and I need to mathing tow plate (of plasma) in to Rf power supply please if any one have information about...
Dear all, I would like to ask you, how exactly can I do a diffusion annealing? I have deposited by e-beam evaporation 2 layers one on top of the other, Fe and...
The exact match will depend on the frequency of the disharge and the size/material/spacing of the electrodes. You will then have to worry about the process...
Dear Farhad, You can coat Ti coating more than 5 microns by PVD method; especially by Arc-PVD. Also you can apply Ti coatings by thermal spray, plasma spray or...
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