What is conformal coating for electronics printed circuit boards
Conformal coating in printed circuit boards
Printed circuit board, PCB, is featured on the majority of electronics. The boards connect the electronic components in the devices, soldered onto PCBs. The boards provide mechanical support to the devices and connection; they are fundamental parts of all main electronics.
The circuit boards are exposed to temperature fluctuations, dust, and rain, all of which can seriously damage electronics. The protective conformal coating is necessary to mitigate environmental threat damages. The coating also keeps the boards safe from dialectical breakdown. The right protection must, however, be chosen for the different devices so the coatings do not end up interfering with the device's functionality.
Conformal coating in telecommunications
The mobile phone is the most popular device today, and the fact is 99% of the adult population in the globe own mobile phones. This important telecommunication device comes with intricate, complicated, and delicate printed circuit boards. It has necessitated a conformal coating to protect against mechanical stress and extreme environments and adapt to the unique shapes without affecting functionality.
The telecommunications industry relies on conformal coatings to design transmission equipment that is safe to use under all environmental conditions. There are reliable coatings for mobile phone protection, which keep the circuits well-protected and functioning properly.
Conformal coating application
When faced with a need to use conformal coatings on electronics, you should remember the following in the application process:
• The production requirements throughout the process should drive application methods and can affect the speed of coating
• The board design, solvent components, connectors, and other sensitive variables will directly affect the application process
• If conformal coating is required sporadically, then it will not be necessary to use expensive and specialized equipment during the process
• For electronics that are mission critical, use repeated methods of application that are highly reliable and automated to get the best results
The most common conformal coating application methods for electronic include:
Manual spraying
This type of application for the coatings is best for low production volumes, especially when there is no capital equipment. You can use a handheld spray gun or an aerosol in the spraying. The method is time-consuming, and the consistency and quality will depend on the operator's performance. Remember to mask up if you choose to use this application method.
Automatic spraying
Programmed systems are used for spraying the PCBs. A spray head is placed above a board conveyor, which moves them in for spraying. Selective coating can also be achieved using automated systems using robotic spray nozzles to apply the coatings on specified board areas. Automatic spraying is most suitable for high-volume assembly as it eliminates labor.
Brushing
It is a conformal coating application method used for reworks and repairs. The coating is brushed on specific board areas and not the entire board. This method is low in cost but is labor-intensive and variable. It works great for small production needs.
Dipping
It is a popular application method in conformal coating, especially for high-volume assembly. It is most practical when the coating is needed on both sides of PCBs. The film formation results depend on immersion and withdrawal speeds, viscosity, and immersion time.
Considering how sensitive conformal coating application is, it is best to let the specialists handle it on your behalf. Their experience and knowledge of the coating methods and processes will make it very easy to achieve the desired results.
The product has excellent weather resistance and has good adaptability to natural environment. Excellent electrical insulation performance, can avoid the reaction between components and lines, special water repellent, can prevent components from being affected by moisture and humidity, good heat dissipation ability, can reduce the temperature of electronic components working, and prolong the service life.
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Product Category: Low temperature curing epoxy adhesive
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Acrylic glue non-flowing, UV wet dual-cure encapsulation suitable for local circuit board protection. This product is fluorescent under UV(Black). Mainly used for local protection of WLCSP and BGA on circuit boards. Organic silicone is used to protect printed circuit boards and other sensitive electronic components. It is designed to provide environmental protection. The product is typically used from -53°C to 204°C.
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DeepMaterial
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