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Parylene coatings have been used for years to protect a wide variety of equipment. They are useful in various industries including medical, automotive, electronics, military etc.
Medical devices and components such as catheters, needles, stents, electrosurgical instruments, ocular implants etc. are given excellent chemical, moisture and dielectric protection through Paralene coating. The coating reaches every nook and cranny of the components as parylene is used in the vapor deposition process.
Parylene coatings are used to protect automotive components such as sensors, circuit boards, MEMS, gaskets, etc. The coatings are pinhole-free, ultra-thin and precisely conformable, providing excellent chemical, moisture as well as dielectric barrier protection to components that need to survive the harsh automotive environment. They are suitable for the protection of critical components with many applications such as power train control, emissions monitoring, tire system monitoring and engine/fluid monitoring systems, just to mention a few.
In addition, electronic components also enjoy protection from parylene coatings. Parylene is used in a vapor deposition process that ensures ultra-thin coverings that break down into crevices and the tiniest profiles of electronic components for complete encapsulation. Since there is no liquid phase in the deposition process, there is no pooling, meniscus or bridging effect once applied in liquid coatings, therefore, the excellent dielectric properties of the coatings are not compromised.
Other components such as sensors, circuit boards, multi-layer packages and MEMS are protected by the ultra-thin parylene coating, while LEDs used in various applications such as utility meters, agricultural equipment, hydrocarbon drilling, etc. are not spared. The coverings are lightweight with excellent barrier properties that do not add dimension or significant mass to delicate components. They are UV stable and optically clear making them superior to other conformal coverings such as urethane, acrylic, silicone and potting compounds that were used for older electronic components.
Parylene coating has been used in the military for so many years. Parylene N,C and HT are QPL listed for MIL-I-46058 and meet the requirements of OPC-CC-830. Parylene HT has the smallest molecular structure which enables it to easily penetrate small areas to provide complete coverage without compromising operational capabilities. It also has the ability to provide long term thermal stability up to 350°C. It is useful for protecting military components such as sensors, circuit boards, LEDs, multi-layer packages, etc. These components are used in various applications such as radar systems, aircraft control systems, armament control systems, etc.
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