Hello All,

 

What is the expected shelf life for PCBs with ENIG finish? IPC-4552,
Table 3-1 suggests the PCBs to meet solderability requirements of
category 3 durability with six months shelf life. I would appreciate
your response to the following questions:

1-       How should the PCBs be handled during this time period?

2-       What should be the temperature swing?

3-       What should be the humidity range?

4-       What if the PCBs are older than 6 months and cost a lot of $?
How could we justify to use them?

 

 

Thank you in advance,

Paymon


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