There is a storage time after PCB complete manufacture.it need be baked if more than storage time,otherwise there easy occur burst board problems when make SMT.The storage time of PCB and the temperature and time of baking PCB are standard in industry.
I. Regulation of PCB control
(1.) PCB unpacking and storage
(2.) PCB Baking
(3.)The method of PCB baking
II. Preservation and baking of PCB in different regions.
The specific storage time and baking temperature of PCB are not only related to the manufacture ability and manufacturing process of PCB manufacturers, but also to the region.
OSP and pure gold PCB, the storage time is usually 6 months, for the OSP process is generally not recommended to bake. The region is a great related to PCBs preservation,in general moisture is heavy in southern region,it’s very damp in Spring.PCBs must be used up within 24 hours,otherwise easy to oxidation,it’s the best used up within 8 hours after unpacking.The weather is generally dry in the Northern region,PCB has a longer storage time and a shorter baking time.the baking temperature is generally 120+/5℃,baking time according to the specific circumstances to decide.
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