Meaning
Financial projection of the expenses associated with different circuit board plating options allows procurement teams to balance performance against budget. Effective surface finish cost modeling accounts for the price of raw metals and the complexity of the chemical application process. This analysis excludes the cost of the base laminate and focuses on the final treatment of the exposed copper.
Pricing Logic
Market fluctuations in the price of gold and palladium have a direct impact on the final cost of a board. During surface finish cost modeling, the thickness of the plating is multiplied by the current metal spot price to estimate the material overhead. This calculation shows that electrolytic gold is significantly more expensive than organic solderability preservatives which use no precious metals.
Yield Influence
Potential for defects during the assembly process can change the effective cost of a cheap finish. While OSP has a low initial price, surface finish cost modeling may show it is more expensive overall if it leads to more solderability failures. ENIG provides a more consistent surface for fine pitch components, reducing the scrap rate and lowering the total cost of ownership for complex designs.
Market Variation
Supplier location and the volume of the order also play a role in the final quote provided by a factory. Detailed surface finish cost modeling includes the environmental compliance fees associated with treating the waste from the plating tanks. Choosing a finish that is widely available in the local supply chain can reduce lead times and shipping costs.
