Why do medical device PCBs need to have three protections?
Release time：2025-10-23
Click count： 1030
PCB (printed circuit board), as the "nerve center" of medical devices, carries the core functions of signal transmission and circuit connection. In the medical field, medical devices often face various complex environmental tests, which may pose a threat to the performance and lifespan of PCBs. So, in order to ensure the continuous and reliable operation of medical devices, does the PCB of medical devices need to carry out three protection measures? The answer is obvious. Three proof protection is not an optional measure for medical device PCBs, but an important guarantee measure that must be implemented.
1、 Medical environment: The "invisible threat" faced by PCBs is usually the environmental conditions in medical scenarios, which pose multidimensional challenges to the stability of medical device PCBs. In hospital wards, operating rooms, and other areas, frequent cleaning and disinfection are daily operations to maintain hygiene standards. Chemical substances such as alcohol and chlorine containing disinfectants may come into contact with the surface of medical devices during the cleaning process, and may penetrate into the internal PCB. These chemicals are corrosive and long-term contact can damage the protective layer on the PCB surface, resulting in exposed copper foil, corrosion of solder joints, and causing short circuits or open circuits in the circuit. Some medical devices need to be used or stored in environments with high humidity, such as dental equipment and respiratory therapy instruments. Moist air can cause PCB to become damp, leading to a decrease in insulation performance, which may not only cause signal interference but also damage components. In addition, medical devices are inevitably exposed to dust and impurities during transportation and handling. These tiny particles adhere to the surface of the PCB and accumulate over time, affecting heat dissipation and even forming conductive pathways between components, leading to equipment failure. These hidden "hidden threats" in the medical environment make PCB's three proof protection an inevitable requirement. 2、 Three proof protection: the "sturdy barrier" that safeguards the PCB. Three proof protection includes moisture, corrosion, and mold prevention. Through specific processes, a uniform and dense protective film is formed on the surface of the medical device PCB to build a sturdy "barrier" for the PCB. This protective film can effectively isolate external moisture, prevent moisture from penetrating into the PCB and affecting circuit performance. Even in high humidity medical environments, it can maintain the insulation and stability of the PCB. In the face of chemical substances during cleaning and disinfection, the three proof protective film can resist the erosion of various corrosive liquids, prevent copper foil and solder joints on the PCB surface from being corroded and damaged, ensure the reliability of circuit connections, and reduce equipment failures caused by corrosion. At the same time, the protective film can also prevent the growth of mold and prevent mold hyphae from damaging PCB circuits, especially in humid and suitable temperature environments. Mold prevention and control are crucial for the long-term use of medical devices. It can be said that the three defense protection provides comprehensive protection for the safe operation of PCBs and is a key link in ensuring the performance of medical devices. 3、 Implementing protection: a necessary measure to ensure medical safety. In the production process of medical devices, implementing PCB's three protection is not an additional burden, but a necessary measure to ensure medical safety. Related production enterprises need to choose appropriate three proof protection processes and materials based on the usage scenarios and needs of medical devices, ensuring that the protection effect meets the strict standards of the medical industry. The implementation of protective technology requires strict quality control, from PCB cleaning, coating to curing, every step must be operated accurately to avoid protection failure caused by process defects. At the same time, it is necessary to conduct strict testing on the protected PCB, using various methods such as humidity testing, corrosion testing, and mold testing to verify whether the protective performance meets the standards. Only PCBs that pass the testing can be used in medical device production. Only by implementing the three prevention and protection measures can we reduce medical device problems caused by PCB failures from the source and lay a solid foundation for medical safety. The stable operation of medical device PCBs is a prerequisite for the effectiveness of medical devices, and three proof protection is the key to ensuring PCB stability. In complex medical environments, neglecting the three prevention protection of PCBs may lead to equipment failures, affect the normal operation of medical services, and even pose a threat to the safety of patients' lives.
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