PCBA Tech - PCBA processing electrostatic protection requirements

PCBA processing electrostatic protection requirements
Since PCBA processing often involves a variety of electrostatic sensitive electronic components and some processing techniques that have certain requirements for electrostatic protection, certain anti-static requirements are required in PCBA processing. Electrostatic warning signs are mainly used to post, hang, and place on factories, equipment, components and packaging to remind people of the possibility of electrostatic discharge or electrical overload damage during operation.

PCBA processing electrostatic protection requirements

Workshop anti-static requirements
According to the requirements of product production level, the production workshop should be equipped with corresponding anti-static facilities, and the ground wire should be independent and reliable. Keep constant temperature and humidity in the workshop. Separate static safe working areas, and affix obvious anti-static warning signs.

The grounding system outside the workshop is inspected once a year, and the grounding systems such as the floor/mat, workbench, etc. in the workshop shall be inspected once every six months, and corresponding records shall be made.

The temperature and humidity in the workshop are respectively controlled at (25±2) degree Celsius and 65%±5%RH; 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 that are prone to static electricity are prohibited from being brought into the anti-static area;

The handling, storage and distribution of electrostatic sensitive components must be stored in anti-static packaging;

The anti-static package can only be opened after the corresponding anti-static measures have been taken;

Trolleys and shelves used in anti-static areas must have proper grounding devices;

Anti-static work clothes and work shoes are prohibited from being worn out of the work area, and cleaned regularly 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 components and circuit boards with plastic products or tools (such as computers and computer terminals);

Connect all tools and machines to the ground;

Use static protection table mats;

Employees without wristbands approach 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 holding the component, so that the static electricity on your hands is transmitted 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, they should be held at the edge of the PCB, and do not directly touch the components or the circuit on the board;

Do not drag or slide electronic components on any surface;

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

Take out the 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 antistatic container or packaging box;

Reduce the number of handling to a minimum.