source:Industry News release time:2022-08-25 Article author:yu Popular:pcb
With the development of electronic products in the direction of miniaturization, the size of chip components is getting smaller and smaller, and the requirements of Mingao components on the processing environment are also becoming higher, which puts forward higher requirements for SMT chip processing. As a In addition to the strict control of the process flow, the SMT chip factory with efficient operation and good quality control needs to strictly control the environment of the SMT workshop, and clearly understand some precautions.
1. Environmental requirements of SMT chip processing workshop
SMT chip production equipment is a high-precision mechatronics equipment. The equipment and process materials have certain requirements on the cleanliness, humidity and temperature of the environment. In order to ensure the normal operation of the equipment, reduce environmental damage to components and improve quality , The SMT workshop environment has the following requirements:
1. Power
Generally, single-phase AC220 (220±10%, 0/60Hz), three-phase AC380 (380±10%, 50/60Hz) are required, and the power of the power supply should be more than double the power consumption.
2. Exhaust
Exhaust fans are required for reflow and wave soldering equipment. For full hot blast furnaces, the minimum flow rate in the exhaust duct is 500 cubic feet per minute (14.15m3/min).
3. Temperature and humidity
The best ambient temperature in the production workshop is 23±3°C, generally 17~28°C, and the relative humidity is 45%~70%RH. According to the size of the workshop, a suitable temperature and humidity meter is set up for regular monitoring, and it is equipped with temperature adjustment. Humidity facility.
4. Air source
The pressure of the air source is configured according to the requirements of the equipment. The air source of the factory can be used, or an oil-free compressed air machine can be configured separately. The general pressure is greater than 7kg/cm2. Clean and dry purified air is required, so the compressed air needs to be de-oiled , Dust removal, water removal treatment. Use stainless steel or pressure-resistant plastic pipes as air pipes.
5. Anti-static
Workers need to wear anti-static clothing, shoes, and anti-static wristbands to enter the workshop. The anti-static work area should be equipped with anti-static floors, anti-static seat pads, anti-static packaging bags, turnover boxes, PCB racks, etc.
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