That is how most of these systems are made because you have very few options for a air tight connection. In ultra high vacuum systems the problem is actually helium atoms getting sucked through the glass.

kzfaq.info/get/bejne/bZtxorqdmNDMk4U.html&app=desktop

Its a mirror, why would you want AR coating?

do you want tungsten filaments? we are supplier

Its heat energy like water boiling. Al ion gas shoot off it metal because it has higher energy than it's neighbor atom.

@@alexlo7708 Its neighbor atom practically doesn't exist tho . Vacuum??

@@aerosoapbreeze264 neighborhood in solid metal surface.

@@aerosoapbreeze264 They must have source metal in vapor disposition.

Argon gas is pumped in after vacuum if i remember correctly

Spectrum-Coatings, Majestic Coatings, Owl Laboratories. These are first surface coaters. For a regular mirror, best just to buy a kit and DIY. No chamber needed but you do need a VERY clean work area.

Reverse pressure, as in vacuum?

PVD

Did you notice the effort he went to to create the vacuum? If you just have to fill with inert gas then that is what everyone would do. You need a vacuum.

Cannot be done with a simple vacuum pump

Ok , Thank you. Obrigado

May I know why?

@@wannabe8x6 Due to the oxygen in the air that will react to everything but also due to the air pressure it self that is to high so the aluminium vapor would not even reach the mirror and if something will be able to reach it the surface will be far from shiny due to severe oxidation of the metal on its way. The tungsten coil will also be attacked by the oxygen and tungsten trioxide would also be made du to this which is a yellow substance and also not shiny one bit. You have to get the right equipment so you can get down to at least 5-E6 Torr before even thinking about doing something like this. A turbo pump is expensive but easier to handle but absolutely nothing is allowed to fall down in it no matter the size when it is on so its very sensitive but it will not emit anything into the chamber like oil or such. The other thing to use is a diffusionpump (used in the video) that is much cheaper but require a special type of little expensive oil and a DP will leak small amounts of oil into the chamber that could be bad for what you are doing or not a problem. But you usually use a special type of baffle that prevent like 99.99& of any oil to enter the chamber that should be enough, otherwise you need to use liquid nitrogen or similar to really remove pretty much all of it. And with a diffusion pump so if a nut will fall into it, it will just go on like nothing happen. If the same would happen with a turbo pump at full sped you would run and the pump would also be totally destroyed after that, it would be a very dangerous situation. So they both have their pros and cons but one of them is needed to be able to do what is done in the video, and also a rouging pump.

@@dtiydr oiless vacuum pump thats it

+Junkers Yes is sputtering.

hello, is it possible to make a half mirror with only 50% transmission?

Actually, this process is evaporation not sputtering. Two very different processes.

Vapor deposition

I was just about to say that, then I read your comment.

Search magnetron sputtering on KZfaq

He used a variac to power the element

@@shrikantpatil3924 This is not magnetron sputtering, it's regular thermal deposition...