Electrostatic protection in the process of Pcba processing is a systematic project.
SMT PCBA processing plants should first establish and inspect basic anti-static projects, such as ground wires and floor mats, benches, and environmental anti-static projects. Because once the equipment enters the workshop, if the environment does not meet the requirements and re-rectification, it will cause a lot of trouble. After the foundation project of the smt patch processing production line is built, if it is a dedicated site for long-term products, anti-static equipment should be configured according to the anti-static requirements of long-term products. If there are multiple varieties of products, anti-static equipment should be configured according to the highest level of anti-static requirements.
Anti-static work area The anti-static area in the production line is prohibited from directly using wooden floors or laying wool, hemp, chemical fiber floors and ordinary floor leather. The floor made of electrostatic conductor materials should be used, such as anti-static raised floor or defense on the ordinary floor. Static ground pad, and effective grounding.
The ceiling material in the anti-static area should be anti-static products. Generally, gypsum board products are allowed to use, and ordinary plastic products are prohibited. Antistatic wallpaper should be used for wall fabrics. In general, plaster paint or lime paint is allowed for walls, and ordinary wallpaper and plastic wallpaper are forbidden. This is the case from the current general usage of Shenzhen pcba manufacturers.
The anti-static facilities in the production line of the patch processing plant should have an independent ground wire and separate from the lightning protection wire; the ground wire is reliable and has a complete electrostatic leakage system. The workshop maintains a constant temperature and humidity environment, and the general temperature is controlled at ( 25±2)℃, relative humidity is 65% 5%; the entrance is equipped with ion wind, the anti-static work area should be marked with regional boundaries, and warning signs should be hung in obvious places. The warning signs should comply with the "Electronic Products Anti-static Discharge Control Program" 》(GJB1649-1993), ionized air wind bath equipment should be equipped at the entrance of the work area.
The ESD (ESD) sensitive symbol is a triangle with a hand drawn with a trace inside,
PCB Manufacturer which indicates that the object is very sensitive to damage caused by ESD.
Automotive communication module circuit board is the support of circuit components and devices in automotive products. It provides electrical connections between circuit components and devices. It is a basic component of various electronic equipment in automobiles. Its performance is directly related to electronic equipment. The quality is good or bad.
With the development of the information society, various electronic products often work together, and the interference between them is getting more and more serious. Therefore, the electromagnetic compatibility problem has become the key to whether an electronic system can work normally.
Similarly, with the development of electronic technology, the density of the automotive pcb communication module PCB is getting higher and higher, and the design of the automotive communication module has a great impact on the circuit interference and anti-interference ability. In order to obtain the performance of electronic circuits, in addition to the selection of components and circuit design, good wiring of automotive communication modules is also a very important factor in electromagnetic compatibility.
Although the car communication module PCB is an inherent component of the system, enhancing electromagnetic compatibility in the car communication module PCB wiring will not bring additional costs to the completion of the product. However, in the design of printed circuit boards, product designers often only focus on increasing the density, reducing the occupied space, making simple production, or pursuing aesthetics and uniform layout, ignoring the influence of circuit layout on electromagnetic compatibility and relying on a large amount of signal radiation To the space to form harassment.
A poor car communication module PCB wiring can cause more electromagnetic compatibility problems, rather than eliminate them. In many cases, even adding filters and components cannot solve these problems. Had to rewire the entire board. Therefore, to develop good pcb fabrication wiring habits at the beginning is a way to save money.
