[Sem] Retaining the SEM and building a sputter coater

[Jeff Miller]

True, but for our purposes I figure a dollar store DVM and a photocopy of the lookup table (I think I've seen an XY graph of the function and perhaps a formula as well) should do for now. The embedded setpoint function should serve as a good HV interlock for the coater, and for the diff pump heater for the SEM as well.

I've never heard of carbon coating for an SEM, isn't that more of a TEM thing? I do have a few carbon coaters.

-Jeff



John McMaster <johndmcmaster at gmail.com>

To: "sem at lists.noisebridge.net" <sem at lists.noisebridge.net> 
Sent: Wednesday, July 10, 2013 11:34 PM
Subject: Re: [Sem] Retaining the SEM and building a sputter coater
 


Looked at the user manual in a little more detail.  These are the analog ones, we will have to come up with a separate display.  It might be a lot more convenient to spend a little more and get a gauge matched with a display.  Multimeter, arduino + LCD, etc can work but we will have to do something to make it readable

On 07/10/2013 12:29 AM, Jeff Miller wrote:

Actually, here's a pair of Mini Convectrons for about $40 shipping included. We really could use 2 or 3. The one pictured has 1/8" npt fittings, which are probably the most practical for us at this point. 
>
>
>Ebay item # 
>231013652852
>
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>I'm short on cash, but I could clean, test, and calibrate them. Anyone feeling flush with $40? 
>
>
>-Jeff
>
>
>
>
>________________________________
> From: Jeff Miller <mysterylectricity at yahoo.com>
>To: "sem at lists.noisebridge.net" <sem at lists.noisebridge.net> 
>Sent: Tuesday, July 9, 2013 11:59 PM
>Subject: Re: [Sem] Retaining the SEM and building a sputter coater
> 
>
>
>Oh BTW how big is that diff pump? Water cooled I bet?
>
>
>I've been reading about how silver is a practical alternative to gold for sputtering specimens. Looks promising. 
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>
>
>-Jeff
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>
>
>
>________________________________
> From: John McMaster <johndmcmaster at gmail.com>
>To: sem at lists.noisebridge.net 
>Sent: Tuesday, July 9, 2013 11:26 PM
>Subject: Re: [Sem] Retaining the SEM and building a sputter coater
> 
>
>
>FWIW I am converting my vacuum system from diffusion to turbo pumped.  Assuming it works (they are really expensive working so I had to piece it together from eBay after doing a bunch of research) I may have a Varian diffusion pump to donate to NB for SEM / sputter system use.  I will try to play around with coating on my setup in the near future.
>
>Let me know if there is interest for
                                people to discuss and plan things out. 
                                I can usually only meet on weekends
                                though.
>
>On 07/09/2013 12:08 AM, Jeff Miller
                                wrote:
>
>Well it's a bit of a catch-22. As long as there's ongoing interest in the SEM and we can keep it and the space free from decay, the SEM can stay. If it's underutilized and falls into disrepair, it should go somewhere it might be better appreciated.
>>
>>I haven't seen the space lately but it
                                  sounds finished enough.
>>
>>I think we should put the priority on
                                  building a sputter coater. It should
                                  be fairly simple to do. I've seen some
                                  pretty poor designs on YouTube that
                                  still sort of work. I think we could
                                  build a pretty nice one over 2 or 3
                                  months of weekends, tops.
>>
>>Probably <$100 in parts that we
                                  can't scrounge or make for something
                                  quite nice.
>>
>>I'll be looking at commercial designs
                                  this week and try to come up with some
                                  plans this week and next.
>>
>>-Jeff
>>
>>
>>
>>
>>
>>_______________________________________________
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