PCBA Tech - ​What are the hazards of ESD during SMT processing?

What are the hazards of ESD during SMT processing? ANSI / ESD S20.20 is the most authoritative standard in the international electronics industry for the production and processing of electronic discharge products by the American Electrostatic Discharge Association. Electrostatic protection is the only certification of electrostatic discharge protection standards. Among them, the company has passed ANSI / ESD S20.20 certification, indicating that static electricity has strictly controlled production, thereby ensuring product quality and ensuring product reliability. The following SMT processing factories will conduct a detailed analysis for everyone, let us take a look:

Static electricity and electrostatic discharge are ubiquitous in our daily life, but they are used in electronic equipment and may cause serious damage to electronic equipment. With the rapid development of electronic technology, electronic products have become more powerful and smaller, but this is becoming more and more expensive for electronic components with electrostatic sensitivity. This is because high integration means that the line unit will become narrower and narrower, and the electrostatic discharge capacity tolerance will become worse and worse.

In addition to a large number of special equipment used for new materials, it is also an electrostatic sensitive material, which makes electronic components, especially semiconductor devices, have increasingly higher requirements for electrostatic control of SMT0x3 processing, assembly and maintenance environments.

On the other hand, in the use and maintenance of electronic products SMT processing and production environment, a large number of various polymer materials that are prone to static electricity are used, which undoubtedly brings more difficulties and challenges to the electrostatic protection of electronic products. Electrostatic discharge has two types of damage and damage to electronic products: sudden damage and potential damage. The so-called sudden injury means that the device is severely damaged and loses its function. This kind of damage can usually be found in the quality inspection during the production process, so the main cost of the factory is the cost of rework and maintenance.

Potential damage is the damaged part of the equipment. The function is not lost. It cannot be found during the production process of the smt test, but the product will become unstable and use good or bad, so the quality of the product causes more damage. In these two types of damage, potential failures exceed 90%, and sudden failures are only 10%. In other words, 90% of static damage cannot be detected, only the user's hand will be found in the hand, such as frequent crashes, automatic shutdown, poor call quality, large noise, large jet lag, serious errors, etc. Damaged by static electricity. . Therefore, electrostatic discharge is considered to be the biggest potential killer of electronic products, and electrostatic protection has become an important part of the quality control of electronic products.

The difference in the use of domestic and foreign brand mobile phones is mainly reflected in their differences in electrostatic protection and anti-static design. In fact, the electronics industry has a long history of static electricity. From the emergence of electronic products, especially transistors, this problem has begun to be recognized and taken seriously by smt companies and the country. The research on static electricity and static electricity protection has gradually evolved into an emerging edge subject, forming modern static electricity engineering and static protection engineering, including static electricity principles and models of static discharge, static equipment, static electricity hazards and their protection and related static electricity measurement technologies.