As we all know, static electricity is produced everywhere. With the development of science and technology, the production and application of VLSI and microwave devices, the size of devices becomes smaller and the oxide film inside the chip becomes thinner, which makes the ability of devices to withstand electrostatic discharge decline. In the production of electronic products, the pretreatment, assembly, welding, cleaning, three proofing and testing of components may cause damage to components due to electrostatic discharge. Therefore, purification manufacturers must put forward corresponding requirements for anti-static in purification workshop of electronic factory.
1. Protection scope
All production related facilities, equipment, tools, personnel, work table, packaging materials, storage environment and operation process shall be subject to electrostatic protection measures and included in the management. Production equipment: plug-in line, welding line, Mounter, plug-in machine, wave soldering machine, AOI, flying needle tester, etc. Production tools: welding platform, tin absorber, component box, turnover car, etc.
2. Protective measures
2.1 establish anti-static grounding system
(1) human body electrostatic protection system: including wrist strap, work clothes, shoes and socks, work cap, gloves and so on. This overall protection system has both electrostatic leakage and shielding functions. In order to prevent the operator from damaging the components and parts by static electricity when handling the components or printed board components, the assembly operation, inspection, testing, packaging and other relevant personnel must take measures to establish a human anti-static grounding system.
(2) electrostatic protection grounding system of operation device in purification workshop of Electronic Factory
A. the working surface grounding system of the purification workshop of the electronic factory adopts the anti-static grounding working surface and chair: lay the anti-static platform pad or ground pad, and connect to the conductor leading to the ground wire through a resistance of 1m Ω.
B. equipment grounding system
Connect the ground wire from SMT production line, wave soldering machine, AOI, flying pin tester and other equipment on the production site to the ground wire to realize low impedance grounding.
C. appliance grounding system
The working surfaces of various instruments and tools are made of anti-static materials, and the electric soldering iron and tin absorber shall be grounded. Use anti-static turnover car, component box, turnover box and packing bag. The turnover car is equipped with anti-static pad, and each car pulls a metal chain to the ground to discharge the static charge generated during the operation of the purification workshop of the electronic factory.
As a powerful purification engineering company in China, Shandong ed purification Engineering Co., Ltd. has a special project department responsible for the design, production, installation and commissioning of purification in food workshop, cosmetics workshop, printing and packaging workshop, and electronic dust-free workshop. The company integrates professional scheme design team, complete supporting product channels, professional system construction team and perfect after-sales service. With the relevant construction qualification issued by the national construction department; with an experienced engineering technology research and development team; with years of professional accumulation in the field of purification, combined with the construction management practice of many domestic projects, to provide comprehensive and high-quality overall purification system technical support for domestic customers. If you want to know more about the workshop purification construction, please contact the engineering personnel of the project department in detail. For more knowledge of medical purification industry, please pay attention to WeChat public address: Aide-188 (Ed purify oxygen supply).