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[SOLVED] Integrated Circuit leads with Scuff/scratches

Stoshe

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I am not familiar with IC fabrication and manufacturing practices and was seeking information regarding IC pins with noticeable scuffs in the top portion of the lead. Is this a result of manufacturing process or is this a prior used DIP IC? I want to avoid relying on used parts or potentially duds. I do not see scuffs on the pins that would penetrate into board or socket which would be obvious to a prior use. Any advice on this would be appreciated. I attached a photo of IC with this scuffing/scratching affect.
 

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These are most likely to be from the machine that folds the pins. A used part would show wear on the narrower part of the pin,
The IC would be manufactured with the lead frame (all the pins stamped out of a flat sheet) flat, then the edges of the frame are cropped and the pins folded to the final angle.

Brian.
 
The wettable part of the pins looks fine. Machine
handling at test or lead-form most likely. The lead
finish looks unusual for mainstream, like this part
went through "solder dip"; most PDIPs I have
handled or seem, seem to be bright finish (pre-
molding, leadframes are plated; TI says they do
"solder plate" (85/15 Sn/Pb) and solder dip both.
Industry also has a lot of Ni-Pd plating.
 

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