How to avoid static electricity on PCB

During the production, transportation, storage and use of PCB (printed circuit board), avoiding the generation and accumulation of static electricity is crucial to ensure its performance and quality. Here are some measures to avoid static electricity:

Production environment control

1. Static elimination equipment: Install static elimination equipment such as ion fans in the PCB production workshop. Ion fans can generate positive and negative ions, neutralize the static charge in the air, and reduce the possibility of static electricity generation.
2. Humidity control: Control the relative humidity of the workshop within the range of 40%-60%. Appropriate humidity can increase the conductivity of the air, make static electricity easier to dissipate, and reduce the accumulation of static electricity.
3. Floor and work surface: Use anti-static floor and work surface. These materials have a certain conductivity and can quickly conduct static electricity to the ground to prevent static electricity accumulation.

Staff operation specifications

1. Static protection equipment: Operators should wear anti-static work clothes, work shoes and gloves. Anti-static work clothes and gloves are made of special anti-static fabrics, which can effectively prevent static electricity generated by the human body from damaging the PCB; work shoes have good conductivity and can conduct human static electricity to the ground.
2. Operation: When touching PCB, operators should avoid actions that easily generate static electricity, such as fast movement and friction. When picking up PCB, try to touch the non-circuit part of its edge and avoid direct contact with components and circuits.

Material and tool management

1. Material storage: PCB and electronic components should be stored in anti-static racks, boxes or packaging bags. These packaging materials can effectively isolate static electricity and protect materials from static electricity.
2. Tool selection: Use anti-static tweezers, screwdrivers and other tools. These tools have anti-static properties and can avoid static electricity during operation.

Equipment grounding

1. Production equipment: Production equipment such as placement machines and welding equipment that are in direct contact with PCBs should be well grounded. Grounding can promptly guide static electricity on the equipment to the earth to prevent static electricity from being transferred to the PCB.
2. Test equipment: The instruments and equipment for testing PCBs should also be reliably grounded to ensure that static electricity will not affect the test results or damage the PCB during the test process.