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PCB Pad

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Pad cratering is a mechanically induced fracture in the resin between copper foil and outermost layer of fiberglass of a printed circuit board (PCB). It may be within the resin or at the resin to fiberglass interface. Do you have ever problems about pcb pads? please talk here.

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Ixidized pads
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Ricardo Medda

We have received in one lot PCBs with defect of not wetting properly. Pads were finished with HASL but they were matte rather then shiny (attachment). For me looks like they are oxidized. Interesting is there was just top side with such defect. We have treated them with izpropanol and it worked.
What could couse such defect ? What exactly our PCBs manufacturer did wrong during process ? I think those PCBs were exposed for a long time on high temperature and it coused oxidation.
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Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.

CORRERA A.

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Alessandro Cappello

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oficinatecnica

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Bob srfdeiasn

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leonard.roussel

Very valuable!

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