The role of Rotary vacuum pump (also called Roughing pump), in creating a smooth vacuum cycle cannot be stressed upon enough. In turn, this makes rotary/mechanical pump oil an important factor in the smooth running of the vacuum pump. Unfortunately many vacuum pump users do not realize that rotary vacuum pump oil is not an…
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It is quite understandable that when a consumer is extremely satisfied with a product, he tends to ask for the same over and over again. In the vacuum world, DC-704 was the undisputed king of vacuum oils for a long time. Then, in 2012, Dow Corning, the American company manufacturing this oil; for reasons best…
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The entire process of vacuum deposition rests on the foundation of efficient working of Diffusion pump. Good quality Diffusion pumps are like work horses: they are capable of functioning effortlessly for long periods of time provided they are fed nicely and taken care of. For diffusion pumps, the fodder is diffusion pump oil. Diffusion pump…
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Supervac manufactures Graphite foil (SV-GF). These foils are manufactured by a patented process of EXFOLIATION and hot pressing: a technology which very few companies in the world possess. Because of its excellent electrical conductivity, anti-corrosion and thermal resistant properties coupled with compressibility and flexibility, SV-GF works outstandingly in various applications. fig.1 As shown in fig.1,…
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Diffusion Pump oil is of two types – Silicone and Hydrocarbon. Most people these days prefer silicone DP oil because of the following reasons. * Good quality silicone diffusion pump oil will have a high vapor point and therefore deliver a higher vacuum level. * Will be thermally stable. * Compared to Hydrocarbon oil, silicone DP oil…
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GENERAL PROPERTIES Evaporation Boats are ceramic components required for vacuum deposition of various types of metals e.g. aluminum, copper, silver etc. over various substrates. ALFA – Evaporation Boat (Supervac Industries) They are of two types – A) – 2 Component Boat – This type of boat is made with Titanium Diboride (Conductor) and Boron…
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While running the metalizing plant, if we take a few seemingly small precautions, they can go a long way in ensuring optimum usage of energy, expensive materials and thereby money. And as we know, money saved is money earned. Figure 1 shows the Evaporation Boat. Aluminum wire is fed into the cavity of the hot…
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Introduction: In vacuum metallizing, a layer of metal is deposited on a substrate. Better the deposition, better the film quality. Pin hole defect in metallizing, sometimes also referred as pin windows, are the areas where no metal has been deposited. These can be a big problem for quality metallizing especially in yarn grade metalizing where…
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Q.1 How does a diffusion pump work? Ans. A diffusion pump works on the principle of gas diffusion to create vacuum. In a diffusion pump, diffusion pump oil is heated to its boiling temperature. Vapor of this oil is compressed in a vertically tapering hollow cone as it moves up. Simultaneously this oil vapor escapes…
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Q.11 How to prevent back streaming of diffusion pump oil? Ans. To prevent back streaming of Diffusion Pump oil it must be ensured that- System is “Roughed out” before Diffusion Pump is put in line. Rotary vacuum pump is maintaining a vacuum of at least 10-2 Torr. If process is causing release of a large…
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