Electron Beam (e-beam for short) evaporation is essentially a strong physical vapor process that allows engineers to evaporate things that are unable by resistive thermal evaporation. These things are often high-temperature elements like titanium and gold, and in some cases ceramics such as alumina, dioxide and silicon. If you’re still asking yourself what is e-beam evaporation – www.angstromengineering.com – then check out that site.
Okay, so we know why e-beam evaporation is useful, but how is it used? In short, an intense beam made up of electrons created from a filament is guided by electric and magnetic fields to collide the source material. For example, this material could be a gold pellet. Next, the pellet of gold is vaporized inside a vacuum-like closed environment.
At some point in the process, the energy transfer heats the gold pellet. By this time, the atoms from the surface will be able to separate and leave the gold where they will travel over the vacuum-like chamber. The gold atoms can then be used to cover the substrate that’s placed above all of the evaporated material. This is just one example that uses gold as the material, but there are plenty more and you can find out the best e-beam evaporation techniques that best suit your experiments.
If you’re a visual learner you may benefit from learning about e-beam evaporation from this informative video.
Here’s a summary of the video:
* Once the chosen material (for example, gold) is loaded the chamber closes. The chamber then gets down to a low pressure where electricity can be released. Magnets play a big part in directing this electricity.
* The gold is then heated up and evaporated. This process often takes just a few minutes.
* The sensor on the chamber detects the current rate of evaporation. Once the desired amount is reached, the shutter opens and the atoms are exposed to the evaporating gold. Once the required amount of metal is evaporated the shutter closes.