PCB Technical - PCBA operating rules and necessary protective facilities

1. Operation rules during PCBA processing operations

PCBA processing and production belong to high-precision manufacturing. During PCBA processing, the relevant actual operating specifications should be observed. Improper actual operation will damage components and PCBA, especially integrated IC, IC and other components. Because the electrostatic induction protection does not fail in time and is easily damaged, the production environment and processing technology requirements are high.

PCBA processing and production belong to high-precision manufacturing. During PCBA processing, the relevant actual operating specifications should be observed. Improper actual operation will damage components and PCBA, especially integrated IC, IC and other components. Because the electrostatic induction protection does not fail in time and is easily damaged, the production environment and processing technology requirements are high. Any aspect of the problem will destroy all PCBA or various components on it. So what are the operating rules in the PCBA processing and production process? Today, the PCBA processing plant will be introduced to you.

1. Keep the operation pragmatic, clean and tidy. Eating and drinking are not allowed in the work area. No smoking.

2. Reduce PCBA processing and component operation procedures to avoid risks. If you need to use gloves in the production line, dirty gloves will cause environmental pollution, so they need to be removed and replaced if necessary.

3. As a general standard, do not pick and place the surface through the electric welding with your hands or fingers, because the fat metabolized by the human body will reduce the weldability.

4. Do not use skin care oil, various cleaning agents or various types of silicone resins together. In conformal coatings, they can cause solderability and adhesion problems. The welding surface of PCBA processing technology is equipped with professionally configured cleaning agent, which can be used for electric welding.

5. Do not stack PCBA, otherwise it may cause physical damage. The assembly tunneling face should be equipped with various special fixing brackets.

6. Components and PCBAs that are more sensitive to EOS/ESD must use the appropriate EOS/ESD logo. Many sensitive PCBA processes should have relevant markings themselves. This mark is usually located on the RF connector on the board side. In order to prevent ESD and EOS from causing serious damage to sensitive components, all actual operations, assembly and testing must be performed on a workbench that can operate electrostatic induction.

2. Protective facilities must be equipped during PCBA processing and production

In PCBA processing operations, static electricity can cause great damage to sensitive electronic components. Therefore, the protection of static electricity is a systematic project. SMT processing plants must first establish and inspect basic anti-static projects, such as ground wires, floor mats, and The anti-static king project of Taiwan integration, environment, etc.

In PCBA processing operations, static electricity can cause great damage to sensitive electronic components. Therefore, the protection of static electricity is a systematic project. SMT processing plants must first establish and inspect basic anti-static projects, such as ground wires, floor mats, and The anti-static king project of Taiwan integration, environment, etc. Once the equipment enters the workshop, if it is found that the environment does not meet the regulations, it will be a big trouble to re-rectify it. After the foundation project of the smt patch processing production line is completed, 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, and if it is a multi-variety product, it should be configured according to the highest level of anti-static equipment requirements.

Protective facilities must be equipped during PCBA processing and production

Anti-static work area The anti-static work area on site is not allowed to directly use wooden floors or lay wool, hemp, chemical fiber floors and ordinary floor leather. You should choose a floor composed of electrostatic conductor materials, such as anti-static raised floors or ordinary floors. Set up anti-static raised floor and effectively ground it.

In the anti-static area, the ceiling material should choose anti-static products. Under normal circumstances, the use of product gypsum board is allowed, and the use of ordinary plastic products is prohibited. Anti-static wallpaper should be used for wall fabrics. Plaster paint or lime paint is generally allowed for walls, and ordinary wallpaper and plastic wallpaper are forbidden.

The anti-static device on the PCBA anti-static paste processing production line should be separated from the lightning protection line, the grounding device is reliable, and it has a complete electrostatic leakage system. The workshop maintains a constant temperature and humidity environment, and the general temperature is controlled at (25±2) degree Celsius, The relative humidity is 65% 5%; the entry point should be equipped with ionized air wind bath equipment. A triangle-shaped ESD electrostatic sensitive symbol with a hand drawn with a pull mark inside indicates that the object is very sensitive to damage caused by ESD.