Utilizing E-Beam Evaporation and Its Functions

Summary: Here is a description of how e-beam evaporation works.

What is e-beam evaporation? It’s a physical vapor deposition technique that utilizes an electron beam to strike source material. To be more in-depth, a filament-derived beam is directed via magnetic fields towards, for example, shards of Au, in a vacuum-based environment.

Used to coat materials, the source is heated throughout the process and gains enough energy to travel along the vacuum chamber. This then becomes the coating used to cover the substrate above the material that is placed. A common distance that engineers work with is between 300 mm to 1 meter, which is important for the desired result.

With a minimal amount of thermal energy, the distance between the electron beam source and the substrate must be increased. This is because the collision from one molecule to another particle needs to be made up for the lack of thermal energy involved.

To heat the entire surface of the material, an energized beam is used. Powered by large amounts of electricity, the electrons are converted into a beam using the power of magnets. A thermal evaporation system embedded within the process is configured by the engineers for optimum variables.

What’s important to note is that the evaporated molecules need to travel a working distance and not make contact with any residual molecules that were leftover or not impacted by the beam. Why is this so important? It needs to arrive with a low thermal energy, especially in the case of a sensitive substrate that has to be delicately handled. Radiation from the Ebeam energy typically predominates from the transfer but still won’t have too much of an impactful effect in the end result.


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