Parylene conformal coating is an ultra-thin coating applied as a vapor to improve the capabilities of cutting-edge technologies. It is composed of selected chemicals or polymer films and provides complete and even coverage for simple to most complex shapes. It uses micron-thin films the size of a hair or a dollar bill. Parylene Coating is popularly used in applications where performance and reliability are of paramount importance.
Here are some of its benefits:
Waterproofing Electronics
Parylene is used as a layer to protect electronic equipment. It acts as a barrier layer that protects the visual clarity and color of printed circuit boards (PCBs), electronic assemblies, and other similar products. It protects electronics components from moisture, corrosion, salt spray, solvents, and airborne contaminants. Parylene coatings are a good choice for significantly thinner levels, between 0.1 and 70 µm.
Dielectric Strength
Parylene has a high dielectric strength, which makes it a better insulator in comparison to other materials like epoxy, silicone, and urethane coatings. It has an extremely low dissipation factor that changes only slightly with frequency. The possibility of applying an ultra-thin dielectric layer enables high voltages to flow in close proximity without any discharge. This makes it ideal for controlling the electrical path or eliminating arcing when space is limited.
Dry Lubricity
Parylene has inherent excellent dry lubricities, as demonstrated by coefficient of friction measurements. When a submicron level of Parylene is applied to a part, it acts as a lubricating layer. It helps to improve lubricity without the risk of shedding particles. This makes it ideal as a coating for surgical instruments.
Adhesion-Tie Layer
Parylene coating acts as an adhesion layer between a device and a top coating. Due to its inert and biocompatible properties, it is capable of sustaining its adhesion to substrate surfaces. It is used for bonding drugs and hydrophilic coatings to drug-eluting devices or catheters.
Ruggedization
Parylene has conformal properties that play a crucial role in providing strength and rigidity to delicate connections on printed circuit boards (PCBs). With the combination of the crevice-penetrating ability of the Parylene and consistent coating thickness, it provides a protective layer that prevents signs of fatigue caused by solder fatigue from thermal cycling and vibration without board redesign.
Biocompatibility
Parylene is used in varied applications in the medical industry. It is an FDA-approved material that meets USP Class VI and ISO 10993 biocompatibility requirements for human implantable devices. Parylene is a well-documented material that has stood the test of time. I
However, when it comes to choosing the right conformal coating, it depends on several factors, such as the required materials, certifications (IPC or UL?) , environmental conditions and your processing capabilities.
Dawn Technologies is a reputed supplier of Nano Coating and Parylene Coating in Malaysia and Singapore. As a leading Parylene Coating Service Provider, the company provides high-quality coatings and tailored solutions to meet your specific needs.
