COATING

Conformal Coating is a special polymer coating, also known as three-proof glue, which can prevent environmental and mechanical damage, prevent thermal shock damage, and prevent vibration and impact damage; its main function is to protect the solder, electronic components and other metals on the PCB circuit board The area is corroded, blocking adverse environmental factors that can affect performance, such as humidity, heat, fungi, dust and dust. Under the increasingly serious threat of air pollution around the world, the air quality, whether indoors or outdoors, will also be affected. Directly or indirectly affect the service life of electronic products.

Generally speaking, these electronic products are susceptible to corrosive gases, moisture, salt, pollutants, and suspended particles in the environment, especially in environments with high levels of sulfide gas pollution. Special attention should be paid to the sulfide corrosion of electronic products, which may lead to the risk of electrical short circuit and open circuit failure of the equipment, such as crawling corrosion of printed circuit boards/lead frame packages and sulfide corrosion of surface-mounted passive components. Therefore, next-generation electronic equipment not only requires high performance, but also the ability to effectively withstand harsh environments, especially electronic products used in industrial, automotive, aerospace, and outdoor levels, such as data centers, industrial computers, electric vehicles, charging piles, energy storage stations and low-orbit satellites.

In order to effectively isolate the impact of harsh environments on electronic equipment, potting or conformal coating is generally used. However, not all electronic components can be processed by glue potting. At the same time, the effects of curing shrinkage stress, thermal stress, and bubble residue exerted on electronic components during the glue potting operation must be considered, as well as the fundamental design conditions of the product, including: size, casing, weight, Factors such as thermal management, processing, heavy work, inspection, cost and environmental protection. The three-proof adhesive is a specially formulated coating that is mainly used to protect circuit boards and related equipment from the erosion of the environment, thereby improving and extending their service life and ensuring the safety and reliability of use. The purpose for which a coating is applied can be broadly classified as decorative, functional, or both. The coating itself can be a full coat, completely covering the substrate, or covering only a portion of the substrate. <

Conformal Coating is particularly important for applications and products that must withstand harsh environments such as automotive, military, aviation and industrial applications. Due to the advantages of fast processing, easy rework and low cost, conformal adhesive can not only improve the corrosion resistance of the product but also maintain the shape of the printed circuit board without affecting subsequent assembly operations.

• Precision coating machine:PVA Delta 6, iCoat-5< / li>

Coatings prevent solder, electronic components and other metal areas on PCB circuit boards from corrosion.

After selecting the coating method, the following steps will be followed to start applying the coating:

• 1. Use an automated spraying system to spray paint onto specific areas on the PCB circuit board.
• 2. Send the PCB circuit board to the oven for air drying and curing to avoid excessive coating thickness errors or airborne particles adhering to the wet coating surface.
• 3. Check the luminous paint through long-wave ultraviolet light.
• 4. Check whether the coating thickness meets quality specifications to ensure that the product can maintain long-term reliability after assembly.
• 5. Complete product production.