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Vacuum coating technology

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Information @ a Glance

  • Vacuum coating is nothing but the deposition of a film or a coating which is made under vacuum or a low-pressure plasma environment.
  • In General this is the term applied to processes which deposit atomic or molecular monolayers, such as physical vapour deposition (PVD), low-pressure chemical vapour deposition (LP-CVD) processes or plasma-enhanced CVD (PECVD).
  • Roll coating is the one type which requires a good vacuum combined with well controlled deposition sources depositing coatings onto an equally well defined web surfaces.
  • Barrier coatings are of another type used on flexible polymer films and paper for food packaging that is used to reduce the water vapour and oxygen transmission through the paper or polymer film.
  • Vapour Technologies has developed a coating application process which produces corrosion and wear-resistant coatings with a high decorative appearance, and  without generating hazardous waste.
  • The process is highly productive. Deposition occurs over a 360 degree field rather than a 180 degree field. Thus, parts being coated are always in the coating plasma, a significant advantage for film quality and deposition rate.
  • The fundamental concept of vacuum coating is very simple. Liquid coating is pumped into the base of the application chamber and due to the vacuum then created, the material flows freely to coat all exposed sides of the work piece that is being passed through the unit.
  • The coating material is then  transferred to work piece inside the vacuum chamber. Any material that has not been transferred is recycled and returned to the reservoir for the next application. So this process is called a “closed-loop system”, it keeps coating costs down, since no coating product is wasted.
  • Some of the benefits of using Vacuum coating technology: Virtually 100% of the coating is transferred to the work piece, with low coating costs, coat all 4 sides or only selected ones, and selective edge application which is called as shrouding.
  • Other advantages are Precise control of film thickness, Thin applications, Time-efficient application & super-fast drying. And also very low operating  maintenance like No frequent cleaning required, Low skill level required – extremely easy to use.
  • Applications for depositing a film or coating in a vacuum environment are numerous. They range from roll coating, glass coating, optical filters and lenses, semiconductors, CD mastering to wear and corrosive resisting coatings in a wide variety of industries.
  • Using vacuum deposition methods a range of micro-structured coatings of differing metallic elements have been fabricated for use on high power laser experiments.
  • The Lack of safety in the workplace results in monetary impacts such as Downtime, personal injury and fines or penalties. So Always handle vacuum coating machines with care.

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