Pcb Shelf Life

[narasimharao]

Hi,

let me know the shelf life before and after assembly of a PCB. Is there any difference between supplier Is there any difference between PCB class 1, 2 and 3 What is the recommended storage environment for PCB Under severe condition such as boat shipment, is there any life span reduction After auto mount insertion process, RHU machine etc, the PWB is exposed to ambient condition, what is the expected life span

Thanks in advance
Narasimha Rao