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THE SHELF LIFE AND PRECAUTIONS FOR DIFFERENT KINDS OF SURFACE TREATMENTS OF PCB Date:【2018-01-05】 Read【168】 【Back

1, taking into account the difference between the product process and storage conditions, printed circuit board should be promptly used after unpacked (recommended within 24 hours), and the proposed pre-drying, especially in the flexible circuit board PI substrate board , If necessary
Patch welding, it must be pre-drying treatment.
2, for chemical immersion tin or immersion silver products after unpacking recommended within 12 hours of use, or to be re-packaging.
3, if stocked more than the effective shelf life, the boards should be baked first, then test a trial use. some performances should be retested if necessary before using.
4, usually save more than 3 months in the machine before the patch in order to avoid the dangers of moisture, the need for 2 hours 150 degrees baking.
5, storage environment:
  A, good storage conditions: refers to the temperature is less than 25 degrees, relative humidity of not more than 65%, there is temperature control, non-corrosive gas indoor environmental conditions.
  B, the general storage conditions: refers to the temperature is not higher than 35 degrees, relative humidity of not more than 75%, non-corrosive gas indoor environmental conditions.