Category:PCB 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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Stencil Aperture Size and Copper Pad Size Reply 2017-02-02 13:16:55
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mattiamanovalanza

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What should be solder paste stencil aperture proper size in comparison with PCB copper pad for lead free technology? When designing PCB foortprints I was using solder paste pad undersize of 2.5 mils (0.06mm) per side (solder paste pad size was 2.5 mils per side smaller that copper pads size) for all pads. Is it value acceptable? Can the same value of solder pads undersize be applied to all pads on the PCB?
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Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.

grzes91

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I have share it with my classmates. They all appreciate it a lot.

kasemkwang

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It is pretty helpful to my daily learning.

Yves van Moerbeke

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Interesting and useful!
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