Is anyone in the Makerspace membership familiar with Vacuum Systems or welding for vacuum systems?
I am embarking on a 2-year project to build a CVD tool, was wondering what kind of talent we have here, probably a lot.
I don’t think that you will need a specialist welder to do your job, but here are some nice guidelines for planning the welds for a vacuum system. https://www.mtm-inc.com/av-20100416-vacuum-chamber-design-weld-joint-design.html
Virtual leak could be an issue based on your use. These are chambers of air that have very small orifices. When you pump the larger chamber to a vacuum, these can slowly leak air and mess up the vacuum. But, if you actively pulling a vacuum, this may be a none issue, as long as your pump can keep up.
Josh,
Awesome on the endeavor. What are you looking to dep?
I’m sure it isn’t the same … but vacuum welding is quite interesting to me …
Two pieces of the same metal, in a vacuum without oxide coatings will weld together if touched
You can sometimes get it if you just hit two like metals together and it knocks enough oxide loose and removed the air in a spot …
This is a big problem in space with metal sticking together …
It would be fun to see if we can do it at DMS some how
Once you get below a certain level, it is not about if you’re pump can keep up, but how much “conduction” you have from the system to the pump. When your mean free path for Brownian motion is longer than the path diameter, even any moisture on then surfaces can take weeks to fully evaporate out of the system. Weld porosity becomes a real issue in ultra high vacuum systems.
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I am a semiconductor process engineer, my initial goal is to create synthetic diamonds. CVD diamond.
I have a lecture on the calendar in April.
I’ve heard that about you…Dude, it’s Thomas.
I’m digging the idea…more into an ALD DLC…The thinner the bettter. Transparent to most wavelengths, but scratch resistant…
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it is the ultimate semiconductor but is extremely difficult to process lot of development needed, but recent research in Germany found iridium based plate promotes lateral diamond growth and could be near single crystal wafers soon very exciting…