Smt Resistor
I am running SMT Boards thought a Reflow oven and getting Solder Balls . how can I stop them (Not lead free )?
Yes Not a lead free operation I am running boards and I keep getting solder balls on some of the smaller resistor. Isn't there a process for this or what could I do.
Is your solder paste old (past its expiration date)?
Is the solder mask for the paste made to the right tolerances?
Is part of the pre-processing of the blank board to the new ROHS standards incompatible with the lead solder paste?
Those are the only things I can think of, because my main area of expertise is not in manufacturing -- I'm mainly a designer/analyst who makes it out to the factory floor occasionally.
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