Treatment Measures of EPA High Electrostatic Voltage in Static Sensitive Area
The static power supply in the EPA that is higher than 100v must take correct anti-static treatment measures, such as the static power supply on the display, keyboard, tools and equipment, especially the high-static production materials that must enter the EPA.
The main measures of anti-static treatment include anti-static agent, time-sharing operation in partitions, shielding isolation, and grounding. The operation of plastic materials on products and the operation of non-anti-static packaging materials should comply with the principles of zoning and time-sharing operations, that is, these static electricity generation sources should first be operated in an independent special area outside the EPA to make them and electrostatic sensitive devices Isolation, when it must enter the EPA, it should be operated in a period of time with electrostatic sensitive devices to avoid the impact of high static electricity on the device at the same time.
For the display within 30cm from the electrostatic sensitive device and the test voltage higher than 100v, use a transparent conductor shielding layer or similar material for electrostatic treatment.
When the high static voltage is discharged through the grounding method, the soft grounding method should be used. The grounding resistance should not be less than 1 × 105Ω, and the discharge current should not be greater than the human body safety current, that is, 5mA. Under special conditions, the grounding resistance should be determined according to the actual voltage. size.
Static electricity that is difficult to dissipate in static electricity in tooling and equipment and during operation testing should consider the use of static elimination devices or antistatic agents.
In the manufacturing process, equipment and tooling, the parts with high electrostatic risk can be installed with electrostatic field automatic detection recorders for monitoring and statistical analysis of static electricity in high electrostatic risk parts.