HZO, Inc. specializes in providing durable, high-performance coatings, such as Parylene, which requires proper adhesion to deliver its benefits effectively.
The company explains that optimizing production processes and ensuring surface preparation is crucial to achieving strong Parylene adhesion. Proper surface preparation helps avoid coating failures and ensures long-term performance.
Surface preparation is vital for successful Parylene coating, as contaminants like dust, oils, and flux residues can compromise adhesion. Without adequate cleaning, the coating may fail, leading to future issues such as corrosion. Common contaminants include fingerprints, skin oils, salts, and particulate matter in the air, all of which can interfere with the bonding process.
Cleaning techniques for Parylene adhesion focus on removing contaminants using appropriate cleaning agents such as isopropyl alcohol, alkaline detergents, and citrus-based cleaners. HZO recommends ultrasonic washing for precision cleaning, followed by a bake step to remove moisture and volatile residues. In some cases, surface modification methods, like plasma treatment or adhesion promoters such as silane, are employed to enhance adhesion.
Precise cleaning also involves using the right method for different substrates, as not all cleaning techniques are suitable for every material. After cleaning, compressed air and ionizers are used to eliminate microscopic debris and prevent static buildup, ensuring a contamination-free surface for optimal Parylene bonding.
Environmental factors, such as room cleanliness and proper handling of electronic assemblies, also play a crucial role in surface prep. Adhering to industry standards, such as IPC-A-610, and maintaining clean workstations can help prevent contamination and ensure high-quality coatings. HZO also emphasizes the importance of training personnel in proper handling and ESD practices.
To verify coating adhesion, HZO uses cross-hatch testing, which involves making precise cuts in the coating to evaluate adhesion strength. This testing method ensures that the coating meets industry standards and performs reliably under real-world conditions. Proper surface preparation is key to achieving the desired results and meeting customer specifications for corrosion resistance and performance.
