Through holes in SMT pads

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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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olah.mihaly

Is anyone aware of some guidelines regarding through-hole in SMT pads? One of our designers wants to add through-hole leads in some SMT pads for an inductor. The size of the hole is 0.032 inches and takes-up approximately 25% of the pad area. This SMT component would be reflowed. I am concerned about the paste volume being sucked down the hole.

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2017/2/2 5:06:07

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2017/2/4 5:06:07

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2017/2/4 5:06:07

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2017/2/4 5:06:07

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2017/2/4 5:06:07

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