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Thermal evaporation has the benefit of flexible source geometries. This can be used to physically constrain the vapor stream, allowing you to control it.
Filtering is done by forcing vapor through a system of baffles. This removes particulates in the vapor stream, preventing formation of pinhole defects.
Directional control can also be applied to change the angle of vapor streams. The vapor exits a chimney with a specified orientation. Directional sources are typically used for subliming materials.
Vapor control can be done with standard parts or with modified and customized parts to fit your process needs.
Since chromium sublimes when evaporated at low pressures, lumps or granular chrome exhibit erratic activity during evaporation cycles, causing the deposition to lack desired uniformity.
Because of issues with thermal efficiency when using chromium chips or pellets, imperfections such as spalling and pinholes occur in your thin film coating.
These chrome-plated sources present a uniform, cylindrical surface of known dimensions, so that evaporation and the consequent deposition occur at controllable, uniform rates.
This makes these rods excellent pre-loaded evaporation sources for vacuum depositing chromium films.
Some major advantages of these rods include:
Part Number CRW
Chromium plated tungsten rods are typically available in 2″, 4″, and 6″ lengths. Reference above diagram for more details and specs.
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Phone: (562) 426-7049
Email: info@rdmathis.com
Website: rdmathis.com
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