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General process requirements for anti-static

by:Sure     2021-08-16
A. Conventional anti-static process requirements: 1. The operator must wear a wired anti-static wrist 2. The table surface involving the operation of static-sensitive devices must use an anti-static table mat 3. ESD-sensitive devices must be electrostatically shielded and anti-static Appliance transfer. 4. When preparing to unpack and test electrostatic sensitive devices, it must be carried out on an anti-static workbench. If possible, it can be equipped with ionized air generation. A. Anti-static conventional process requirements: 1. The operator must wear a wired anti-static wrist 2. Anti-static table mats must be used on tables and counters that involve the operation of static-sensitive devices. 3. ESD-sensitive devices must be transported with static shielding and anti-static appliances. 4. When preparing to unpack and test electrostatic sensitive devices, it must be carried out on an anti-static workbench. If possible, an ion air generator can be used to remove the charge in the air. 5. The welding equipment and forming tooling equipment used for assembly must be grounded and welded. The tool uses an internally heated soldering iron, the grounding should be good, and the grounding resistance should be small. 6. The power supply system should be modified with a transformer for isolation, and the ground wire should be reliable to prevent floating ground wires. The grounding resistance is less than 10 ohms. 7. When testing the product, connect it to the power supply. When the device is connected, the device cannot be plugged in or unplugged at will, and the device must be plugged and unplugged with the power supply turned off. 8. All ESD-sensitive devices should not be taken out of the original package too early, and should be operated correctly, and try not to touch the legs of ESD-sensitive devices. 9. When using wave soldering, the solder and the transmission system must be grounded. B. In occasions with strict anti-static requirements, the following anti-static process requirements are often required. 1. When performing high and low temperature test or aging test for ESD-sensitive whole machine, electrostatic potential test must be performed on the work site and high and low temperature box first, and the potential must not exceed the safe value, otherwise, static elimination treatment must be performed. 2. When the soldered printed circuit board is to be treated with three preventions, anti-static measures should also be adopted. Do not use general brushing, ultrasonic cleaning or spray cleaning. 3. Low-resistance instruments and equipment (such as signals, bridges, etc.) used in debugging, measurement and inspection should be connected to the input terminals of ESD-sensitive devices after they are connected to power. 4. On the production line of ESD-sensitive testing instruments, electrostatic potential testing should be strictly used to monitor changes in electrostatic potential, so that static elimination measures can be taken in time.
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