Parylene Coating Process – Phase 1 – Prior to Parts Arrival

Once we receive a purchase order from a customer, all of the pertinent information such as drawings, specifications, and special instructions are given to the quality department from our marketing team to create custom work instructions for that particular part.

Parylene Coating Process – Phase 2 – Coating Processes

After the work instructions and other administrative tasks have been completed, the parylene coating production process truly begins in our shipping department.  Once all of the items have been unpacked, they are then routed to incoming inspection.  Here, parts are counted to verify quantity against the customer purchase order and packing slip, as well as inspected to verify that no damage occurred to the assemblies prior to arrival at Diamond-MT.  After incoming inspection, assemblies are then ready for individual processes.  For example, if cleaning or cleanliness testing were required, it would be performed at this time.  Once any unique processes have been completed, the products are then routed to masking.  Masking is done in accordance with the customer’s drawings and requests for coating keep-out areas.  Once completed, the parts go into masking inspection to verify compliance with the customer’s masking drawing.  After parts pass masking inspection, parylene adhesion is administered.  At last, the parylene coating is applied through a deposition process.  Once coating has been deposited, the coated materials have the masking material removed using great care not to damage the thin layer of parylene applied.  The parts are nearing completion, but before they can be packaged up and sent back to the customer, they need to go through a final inspection.  The final inspection ensures that all previous steps were successfully completed and that the final product completely complies with the customer’s drawing and specifications.  Final inspections cover 100% of the product.  Once the parts pass the final inspection, they are returned to the shipping department to be packed back into the boxes they came in and be returned to the customer.  This is usually a ten business day evolution, but can be completed quicker on a negotiated basis.

 Parylene Coating Process – Phase 3 – Post Coating Follow-up

Typically our marketing team is in very close contact with our customers after the coating process to make sure the coating is exactly as the customer requires.  If any changes are necessary to our process, our quality department will work hand in hand with the customer to make sure that the end product is exactly what is needed.

(Photo courtesy of the U.S. Army)

Download our guide on Parylene 101