Four Reasons Why Electronic Products Require Electrostatic Protection
As various types of electronic products rapidly integrate into industrial production and daily life, designers in my country have-for various reasons-often prioritized functionality and performance, while paying less attention to ergonomics and even less to product protection. In reality, however, protecting electronic products is of great significance and offers substantial economic benefits. Because such protection involves a wide range of fields and a complex array of factors, this article outlines why electronic products require electrostatic protection, focusing on four key aspects:
First, the complexity of materials and items involved in the production process: The manufacturing of electronic products-from the production of individual components to final assembly, and through to subsequent use and maintenance-utilizes a diverse range of materials, including semiconductors, metals, various packaging materials, circuit board substrates, device housings, and bases. Furthermore, the production equipment, tools, operating environments, and packaging containers introduce an even greater number of items and materials that may come into contact with electronic components. Processes such as the contact and separation of materials, friction, and induction can all generate static electricity. Moreover, many of these items are composed of polymeric insulating materials, which easily generate static electricity and are difficult to discharge. These factors inevitably increase the risk of electrostatic damage to electronic products and complicate the implementation of protective measures.
Second, the multi-stage nature of electronic product manufacturing, where a lapse at any point can lead to the failure of electrostatic protection: The manufacturing process-spanning from semiconductor materials to final assembly-involves numerous stages, such as semiconductor fabrication, wafer processing, die attachment, fixation, wire bonding, packaging, circuit board fabrication, surface-mount soldering, component insertion, final assembly, and testing. These stages encompass hundreds of individual processes across various manufacturers; static electricity generated at any single point can damage the components. A failure in electrostatic protection at any stage can compromise the final product. Consequently, a systematic, end-to-end approach to controlling static electricity is a critical feature of electrostatic protection in the electronics industry.
Third, the human factor in production increases the difficulty of electrostatic protection: Although modern electronic product manufacturing has reached high levels of automation, human involvement remains indispensable throughout the entire production process. Human activity is far more complex than that of machinery or robots, and the way humans handle components is significantly more intricate; consequently, protecting against electrostatic discharge (ESD) from the human body is far more complex than protecting against it from equipment or the surrounding environment. Furthermore, as humans are the primary agents in the production process, their awareness of ESD risks and their proficiency in implementing protective measures ultimately determine the effectiveness of any ESD control strategy. These factors further increase the difficulty of ESD protection.
Fourth, components are becoming increasingly sensitive, with ever-stricter requirements. The advancement of electronic technology is characterized by higher levels of integration and the adoption of new semiconductor materials; however, greater integration often results in a reduced capacity for components to withstand electrostatic breakdown. Today, the minimum feature size (line width) of integrated circuits has shrunk to 45 nm. Based on a theoretical breakdown strength of 10 MV/cm, this translates to a breakdown voltage of only 45 V-a figure that may be just one-twentieth of the electrostatic voltage generated simply by bending over to pick up a piece of paper. In other sectors, such as hard disk drive manufacturing, ESD control requirements have become even more stringent, with thresholds dropping below 5 V. Such developments inevitably present new challenges for ESD protection.