Coating facts sheet to understand the basic facts on the process. There are numerous other applications as parylene is an excellent. Parylene c, the second commercially available member of the series, is. However, this solution is cost prohibitive and difficult to rework in the field. Developed by the conformal coating handbook task group 533c of the cleaning and coating committee 530 of ipc. The ideal conformal coating as far as processing characteristics are concerned will be onepart twopart systems are very inconvenient to. Removing a polyurethane coating can be difficult due to its a very high resistance to solvents. Potting does the same thing as conformal coating except that it seals the electronic circuitry from all environments inside a shell or mold but reworking is not as easy or even impossible given the. For singlecomponent urethanes, the preferred method of removal is.
In the printed circuit community the most common workmanship citations are ipca610, acceptability of electronic assemblies, and. Model pds 2010 labcoter deposition system is the first portable system designed for deposition of protective. Parylene the parylene conformal coating was applied by a chemical vapor deposition process. Sch india offer a complete range of parylene systems to suit small, medium or large volume end users. It has consistent thickness with true conformance to the board. Parylene deposition system operation manual information. Because of the vapor deposition method, parylene can be applied very thin and still provide excellent circuit board protection. It does depend on several factors including the type of conformal coating you need to remove, where the coating is found and the type of components on the board. Rework and removal of uv lightcurable conformal coatings dymax conformal coatings are solventfree, uvvisible lightcurable resins that are applied as thin coating layers on electronic devices for. Evaluation of esd effects during removal of conformal. Ipccc830 and mili46058c do not define the quality of the application. Download our pdf guide solving conformal coating problems in the application process now. Variables that influence the parylene coating process.
Parylene is a conformal protective polymer coating material utilized to uniformly protect any component configuration on such diverse substrates as metal, glass, paper, resin, plastic, ceramic, ferrite and. Polyparaxylylene xy, also known as parylene, is a coating that is vacuum deposited in a process called chemical vapor deposition cvd. While many varieties of coating exist including a few specialty types there are five main categories based on the substances chemical makeup. Contact curtisswright parylene services with questions related to parylene use in industrial and commercial coating applications, or for assistance with process development and full coating services for your products. Conformal coating overview conformal coatings are specialty film forming products. Conformal coating inspection aci technologies, inc. Iso 485 and 9001 quality management system aligns vsi with customers requirements and ensures regulatory. Conformal coating valuerisk assessment for sandia satellite programs edward m. Conformal coating valuerisk assessment for sandia satellite. Get this basic process wrong and it can be a big problem, leading to the next stage of either repairing the conformal coating leak, stripping the. Primaprotect conformal coating cc7e from ai technology, inc.
Removal of coating clean up of exposed area replacement of component clean up re. Conformal coatings for tin whisker risk management william fox and linda woody lockheed martin missiles and fire control ocala, florida abstract the objective of this study is to evaluate conformal. Frequently asked questions faq about conformal coatings. In order to rework or repair parts on pwas, the conformal coating must be removed. Surface preparation is critical for conformal coating.
Spraying manual is the most popular and the fastest. Coating facts sheet parylene conformal coating is becoming an ever increasing part of everyday life for the defense, biomedical, and other industries. This incredibly reliable coating system has been sold all over the. Manual spraying conformal coating can be applied by an aerosol can or. The raw material for this process is diparaxylelene, which is a dimer composition. Discover the standards that are used in conformal coating removal and how to use them. Conformal coating removal standards parylene coating blog by.
Five types of conformal coatings aci technologies, inc. Typically used in rework and repair, in this method conformal coating is applied with a brush to specific areas of the board a simple technique that is low cost but. The essential guide to conformal coating techspray. Parylene can be effectively deposited with excellent accuracy in the thickness range of 0. Guidelines for design, selection and application of conformal coatings developed by the conformal coating handbook task group 533c of the cleaning and coating committee 530 of ipc users of. A unique difference with the parylene process is that it also coats the underside of low profile. Introduction parylene is the generic name for members of a unique polymer series. Application method and ease of rework are also important factors, but should generally. Xy parylene conformal coatings are a unique type of coating applied.
If problems in a conformal coating defy reliable repair, coating removal may be the only solution. Parylene is considered by many to be the very best thin film conformal coating for environmental protection in high reliability applications. Although parylene is a conformal coating it is different compared to the standard wet liquid conformal. Parylene coating process click to download pdf of this newsletter. Parylene deposition process specialty coating systems. Open collaboration reduces risk and provides the best experience in parylene. Cw parylene coatings have been ruggedizing electronics. Application of all types of milspec conformal coatings. The parylene deposition process consists of two general parts the science, explained above, and the art. Which type of conformal coating is right for my pcb. Image of a board under uv illumination with conformal coating only on the lower.
Guidelines for design, selection and application of. It is possible to rework components that are coated with conformal coatings with a soldering iron. The conformal coating material can be applied by brushing, spraying or dipping. Surface preparation is critical for conformal coating protection robert dusty askin senior materials engineer. Parylene engineering vapor deposited conformal coatings.
Parylene conformal coatings is a unique type of coating applied by vapor. Corrosion is the chemical or electrochemical reaction between a circuit board, usually a metal, and its environment, that produces a deterioration of the circuit and its properties. Aci technologies uses a gen3 systems dc2002 dip coater and gen3 systems sb2900. And while these attributes of parylene contribute to the conformal coatings appeal, they also present distinct challenges, particularly in regards to parylene removal, rework, and repair.
Conformal coating inspection continued on next page quality conformance. The key to removing conformal coating from a circuit board is to match the conformal coating type with the. Parylene conformal coating services, equipment and raw. Parylene vapor deposited conformal coating is considered by many to be the ultimate conformal coating for the protection of devices, components and surfaces in the electronics, instrumentation, aerospace.
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