We are a high reliability PCB fab house mostly making multilayer PCB's. We are a high mix small volume mfr. We have observed some diffferences in the boards processed with different qtys. ie between lots processed in desmear and electroless with the baskets fully loaded and partially loaded. Our chemical supplier says that this should not matter much since we maintain the bath well within the limits and has dump schedules almost 60-70% of what is specified. Has anyone experienced a similar situation? Can anyone give your views on this whether there can be a difference in the boards processed with the baskets fully loaded and with boards processed with the baskets partially loaded.

Rgds

Pradeep


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Micropack Ltd, Bangalore, India

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