Issue link: https://iconnect007.uberflip.com/i/1494346
76 DESIGN007 MAGAZINE I MARCH 2023 Article by Anaya Vardya AMERICAN STANDARD CIRCUITS One of the biggest challenges facing PCB designers is not understanding the cost driv- ers in the PCB manufacturing process. ere are many design considerations that need to be factored into any decision of which final finish to select for a particular application. We will cover these in this final installment of final finish DFM. Final Finish Design Guidelines Shelf Life e shelf lives shown in Table 1 assume that the materials have been stored in the original unopened package under conditions of 68° to 77°F (20-25°C) and < 50% RH. DFM 101 Final Finish Design Guidelines Table 1: Final finishes and corresponding shelf lives