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| February 10, 2012
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Circulation Over 51,000
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July 28, 2010
Soldermask Insulation Issue
We have an unusual component situation. A long lead on an SMT component is overhanging the pad.
Can solder mask in this area provide an acceptable level of insulation between the overhanging component lead and a circuit conductor running below?
F. A.
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No. Solder masks are not designed as dielectric insulators.
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Dr. Craig D. Hillman
CEO & Managing Partner
DfR Solutions
Dr. Hillman's specialties include best practices in Design for Reliability, strategies for transitioning to Pb-free, supplier qualification, passive component technology and printed board failure mechanisms.
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Reader Comments
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The pcg needs to be re-engineering for the component to sit on the pads correctly. This should fix any issues with overhang.
Is this a new vendor for this component, if so does it have the same footprint as the old one?
Another thing to remember is if there is ever a component change on the B.O.M. the PCB may need to be redone for that component.
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