What are the functions and uses of liquid silicone coated circuit boards?

Liquid silicone encapsulated circuit board technology, as an important innovation in modern electronic manufacturing, not only provides comprehensive protection for circuit boards, but also greatly enhances the durability and reliability of electronic products. This technology achieves multiple functions such as sealing, waterproofing, dust prevention, insulation, and shock absorption by uniformly coating liquid silicone on the surface of the circuit board and curing it to form a soft, transparent, and durable protective layer.

The function of liquid silicone encapsulated circuit board

1. Sealing and waterproofing
After coating the circuit board with liquid silicone, a tight sealing layer can be formed, effectively blocking the intrusion of moisture and humidity. This is particularly important for electronic devices working in humid or wet environments, such as underwater robots, outdoor LED displays, etc. The sealing performance not only extends the service life of the product, but also ensures the stable operation of the circuit.
2. Dust and corrosion prevention
Dust, particulate matter, and corrosive gases in the air can cause damage to circuit boards. The liquid silicone protective layer can effectively block these harmful substances, maintain the cleanliness of the circuit board surface, reduce failures caused by corrosion, and improve the reliability and stability of the product.
3. Insulation protection
Silicone material itself has excellent insulation properties, which can prevent current from flowing in unnecessary paths, thereby protecting electronic components on the circuit board from the risk of electric shock or short circuit. This is particularly important for high-voltage and high-frequency circuits, ensuring the safe operation of electronic devices.

4. Shock absorption and compression resistance
The protective layer formed by the solidification of liquid silicone has certain elasticity and toughness, which can effectively absorb and disperse external impact and vibration, and protect the circuit board and its components from physical damage. This is particularly important for mobile devices and devices in vibration environments, such as smartphones, tablets, automotive electronic devices, etc.
5. Improve heat dissipation performance
Some liquid silicone formulations have excellent thermal conductivity, which can quickly transfer heat from the circuit board to the outside world, reduce the operating temperature of components, and improve the heat dissipation efficiency of equipment. This is particularly important for high-power, highly integrated electronic devices, as it helps to extend their lifespan and improve performance.

The wide application of liquid silicone encapsulated circuit boards

1. Manufacturing of electronic products
Liquid silicone coated circuit board technology has been widely used in consumer electronics products such as smartphones, tablets, and wearable devices. It not only improves the durability and reliability of the product, but also makes the device thinner and more aesthetically pleasing. Meanwhile, liquid silicone also plays an important protective role in fields such as LED lighting, smart homes, and industrial automation.
2. Automotive industry
In automobile manufacturing, liquid silicone is used to make various seals, waterproof parts, and shock absorbers. For key components such as automotive electronic control systems and sensors, liquid silicone coated circuit board technology can effectively prevent damage from water, dust, and vibration, ensuring stable operation of the car in various harsh environments. In addition, this technology is also applied to automotive lighting systems, such as the packaging and protection of LED headlights.

3. Medical devices
Medical devices have strict requirements for the biocompatibility and corrosion resistance of materials. Liquid silicone gel is widely used in the manufacturing of medical devices such as catheters, sensors, and artificial organs due to its excellent biocompatibility and high temperature resistance. The liquid silicone coated circuit board technology not only protects the stability of the circuit, but also ensures the safety and reliability of medical equipment.
4. Aerospace
In the aerospace field, equipment needs to withstand extreme environmental conditions such as high temperature, low temperature, strong radiation, etc. The liquid silicone coated circuit board technology provides an effective protective barrier for aerospace electronic equipment, ensuring the normal operation of the equipment in extreme environments. Meanwhile, the lightweight feature of this technology also meets the strict weight control requirements of aerospace equipment.
5. Architecture and Building Materials
Although the application of liquid silicone in the construction field is relatively limited, its excellent sealing performance and durability still have certain potential. For example, liquid silicone can provide reliable solutions in building waterproofing, glass curtain wall sealing, and other areas. With the continuous advancement of technology and the expansion of application fields, the application prospects of liquid silicone in the construction and building materials industry are worth looking forward to.