I’ll report later this week about Clumpy and Kloumpios assistance, but we’ve got a question about the interpretation of magnification to be used for inspection of cleanliness.

Both J-STD-001 and IPC-A-610 state if the presence of a defect cannot be determined at the inspection power, the item is acceptable.  For inspecting of cleanliness, magnification is not required but then a reference to a note indicates magnification may be required fine pitch parts are present.  Magnification may be needed to determine whether magnification affects form, fit or function.

If residues are not visible without magnification, but are visible under magnification, but do not affect form fit or function, are the residues defects?

Dick Krug, CSSBB, CSMTPE
Lead Process Engineer
Sparton Brooksville, LLC
30167 Power Line Road
Brooksville, FL  34602-8299
(352) 540-4012
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