1 / 4

All About Parylene Coating Process

Dawntech is the leading provider of parylene coating in Malaysia. Parylene coating has most superior characteristics and addresses shortcomings of traditional coating processes. It is applied via vapour deposition in vacuum chamber. For more information visit our site:

dawntechnologies
Télécharger la présentation

All About Parylene Coating Process

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The parylene coating process takes place at room temperature so that there is no thermal stress on the product. The same is physically stable and an inert product within the temperature range. It also provides a friction coefficient of 0.25-0.30 along with excellent protection from salt spray, moisture, corrosive elements, etc. existing in the work environment. The polymers are deposited from the vapor phase where all sides of the object are encapsulated to achieve a uniform coated surface. This helps to deliver a truly conformal coating.

  2. / The Parylene Coating Process Includes Three Stages - Sublimation at vacuum at 120 C. This is done by using the stable crystalline dimer di-p-xylylene that delivers vapors of the material in question. Pyrolysis phase that has vapors at 650 C to form a reactive monomer of p- xylylene. This is succeeded by the deposition and polymerization of p-xylylene to attain Parylene. The process also requires proper cleaning, activation, and masking of the product before placing it inside the deposition chamber. Such product remains at room temperature during the entire process. Dimer di-p-xylylene is placed in a glass tube at the opposite end of the deposition chamber in an aluminum cup called a boat. The thickness of the coating is determined by the actual volume of the dimer placed in the boat.

  3. Once the process initiates, the end cap is placed on the tube, and the vaporizer radiant heater cycles using a pressure safety interlock to ensure a safe operational limit. Slowly, the dimer takes a vapor state and the molecules travel down the tube using reduced pressure at the opposite end. The dimer then moves into the pyrolysis zone where the high temperature cleaves the dimer into radical monomers. When these molecules enter the deposition chamber, they form a long chain polymer on the surfaces of the chamber. A cold trap is utilized between the deposition chamber and vacuum pump as it prevents the parylene molecules that have not been deposited on the product from getting into the vacuum pump. This prevents oil molecules from back streaming into the chamber. However, the complete process takes place minus a catalyst or solvent.

  4. Contact Us sales@dawntechsb.com +6075543118 https://www.dawntechsb.com/ https://www.facebook.com/Dawn-Technologies-1013296998806343

More Related