Generally, custom PCB manufacturing workshops have the following requirements for dust-free environment. First, the load-bearing capacity, vibration, and noise requirements of the plant. The bearing capacity of the plant road surface should exceed 8KN/m2; the vibration should be controlled within 70dB, and the highest value is not Over 80dB; noise should be controlled within 70dBA; switching power supply generally requires single-phase AC220 (220±10%, 0/60Hz), three-phase AC380 (380±10%, 50/60Hz), and the output power of the switching power supply must More than double the functional loss.
Next is the air source requirements of PCB manufacturing and assembly workshops. The air source pressure is equipped according to the equipment requirements. The air source of the factory can be used, or an oil-free compressed air machine can be independently equipped. The general pressure exceeds 5kg/cm2. Clean and dry purified air is required, so compressed air must be degreasing, dusting, and sewage treatment. Use stainless steel plates or pressure-resistant plastic hoses as gas pipelines. There are also requirements for an exhaust system, and the reflow oven and wave soldering machine must be equipped with exhaust fans. For a full hot blast stove, the minimum flow rate of the exhaust system pipe is 500 cubic inches/minute (14.15m3/min).
The ideal lighting number in the PCB assembly and production workshop is 800~1200LUX, at least not less than 300LUX. When the lighting level is low, install some lighting in areas such as inspection, maintenance, and precise measurement. The PCB assembly production workshop must maintain daily cleaning, dust-free, and corrosive vapor. The production workshop needs to have cleanliness control, and the cleanliness control is: 500,000; the working temperature of the production workshop is 23±3℃ as the best, generally 17～28℃, and the air humidity is 45%～70%RH; The specification and size of the production workshop are set with suitable thermometers and hygrometers, which are monitored regularly and equipped with equipment for adjusting temperature and humidity.
The above are the requirements for the clean workshop of pcb manufacturing. I hope that after reading it, it will be helpful to you. If you want to know more about SMT patch processing, please consult online customer service or call our company's service hotline (0755 -26978877) for consultation, we will wholeheartedly provide you with quality service!