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Anti-static requirements for PCBA patch processing and production

PCBA production often involves various electrostatic sensitive electronic components. And some PCBA process flow with specific requirements for electrostatic protection. So certain anti-static requirements are required in the PCBA manufacturing process. Electrostatic warning signs are mainly used to post, hang, and place on PCBA factory, equipment, components, and packaging to remind people of the possibility of electrostatic discharge or electrical overload damage during operation.

Workshop anti-static requirements
According to the PCBA technology level requirements, the production workshop should be equipped with corresponding anti-static facilities. And the ground wire should be independent and reliable in  PCBA processes. Keep constant temperature and humidity in the workshop. The PCBA factory should isolate the static-safe working area and affix obvious anti-static warning signs.


PCBA company should inspect the grounding system outside the workshop once a year. And they shall check the grounding systems once every six months in the workshop, such as the floor/mat, workbench, etc., and make corresponding records.

The workshop's temperature and humidity are controlled at (25±2)℃ and 65%±5%RH in the PCBA manufacturing process. The PCBA company should measure twice a day and make corresponding records.
 
Statutory protection requirements for employees
When entering the anti-static area, you must wear anti-static overalls and anti-static shoes as required;

Before touching electrostatic-sensitive components, you must wear a grounding wrist strap or grounding foot strap as required and pass the corresponding electrostatic test;


Articles prone to static electricity are not allowed to be brought into the anti-static area;

The PCBA company must store handling, storage, and distribution of electrostatic-sensitive components in anti-static packaging.

Take corresponding anti-static measures before starting PCBA production. Only then can we open the anti-static package.

Trolleys and shelves used for anti-static during PCBA production must have proper grounding devices.

Anti-static work clothes and work shoes are prohibited from being worn out of the PCBA production area. And pcba factory should regularly clean according to regulations.

The cleaning of the anti-static work surface must use a cleaning agent approved by the electrostatic protection personnel.

Avoid placing static sensitive pcba electronics and circuit boards with plastic products or tools (such as computers and computer terminals).

Connect all tools and machines to the ground in pcba production.

Use static protection table mats in the pcba manufacturing process.

Employees who are not wearing wrist straps are prohibited from approaching the static protection workstation.

Immediately report all possible causes of electrostatic damage.

Matters needing attention during operation
Touch the work surface with both hands before pcba assembly. Let the static electricity on your hands be transferred to the ground through the anti-static work surface.

Place the device pins down on a table that dissipates static electricity;

When holding an integrated circuit, you should grasp the body of the integrated block, not the pins;

When operating electronic components, you should hold the edge. Do not directly touch the pcba components or the circuit on the board;

Do not drag or slide electronic components on any surface during pcba production.

The non-conductor should keep a distance of more than 1m from the static-safe working area;

Take out the pcba components and circuit boards from the anti-static packaging box only in the static-safe working area;
 
Place the static sensitive components that are not in use temporarily in an anti-static container or packaging box;

Reduce the number of handling pcba production to a minimum.

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