ESD risk of transmission track of automation equipment in the electronics industry
Many companies ignore the risks brought by the conveyor track of automated equipment when formulating testing items within the EPA.
Many automation equipment in the listed SMT industry (especially non-standard automation equipment) are often considered for the completion of simulation actions when they are introduced. If there is no full-time ESD personnel involved in the acceptance of the equipment, many ESDs are often ignored in the subtle accessories. risk.
The above automated board loading equipment uses non-anti-static materials or materials greater than 1×109 ohms in the conveying track. When surface A is finished with sensitive components and then surface B is mounted again, when using such a loading machine to transfer PCB , The track cannot meet the grounding requirements of less than 1×109 ohm, and the static electricity generated by the friction of the PCB, the fixture for holding the PCB and the track continues to accumulate. I recommend using high-quality anti-static table mats to lay on the track.
Risk 1: There will be a risk of power generation when the PCB touches the grounded equipment again (such as the steel mesh involved in the solder paste printing process after the board is placed);
Risk 2: The static electricity accumulated in the track when the PCB is transferred again has the risk of discharging the PCB at a low potential.
In order to avoid the above risks, when considering the introduction of automation equipment, companies should organize full-time ESD personnel to identify the risks of the equipment. When encountering similar transmission devices, consider replacing the conveyor belt made of anti-static mats that meet the grounding value of less than 1×109 ohms. .