In many purity-critical applications the potential for contamination created by contact of the process stream with sample transfer components such as tubing, fittings, and valves is a major concern. For example, the slightest contamination in gases used in manufacturing semi-conductor devices can create high failure rates in end products.
New Dursox™ and Silcolloy high purity barrier coatings can eliminate interactions between process gases and transfer system components. Our extensive evaluations in the fields of passivation, corrosion resistance, and ultra-high vacuum show SilcoTek® coatings eliminate outgassing of impurities into the sample stream and will not react with process stream components.
Dursox and Silcolloy® are resistant to many corrosives used in the semiconductor and PV industry.
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SilcoTek® Surface Treatments
SilcoTek passivation and surface protection layers are deposited using a chemical vapor deposition (CVD) process in which the item to be treated is heated under vacuum. Our current capacity enables us to treat items up to 6 feet long, or continuous lengths of coiled tubing exceeding 2000 feet (600 meters). Items that can be evacuated, such as gas chambers, can have a volume of up to 43 cubic feet.
When the item has been heated to the appropriate temperature, the reacting gases that form the protective surface are introduced, depositing a durable, amorphous silicon layer that grows and overlays itself multiple times. The reaction layer penetrates into the lattice of the treated piece and binds solidly. Consequently, it is possible to work a piece, such as bending a length of treated tubing, without creating cracks, flakes, or other flaws in the layer. By controlling the variables in the process, we control the layer type and thickness. Layer thickness ranges from 0.03µm to 1.5µm, controlled to our specifications.
All coatings are applied to customer supplied items on a custom basis.