Another Land Pattern Mixup

Fri, 02/05/2010 - 9:54am
Screaming Circuits

PCB fab error - L2 pads are not correct Here's an interesting error that doesn't show up very often. Notice that the opening in the solder mask matches about what the copper land pads should be, but the pads themselves are really tiny. To start with, it's not an exact match. It would fit the part a little better if the pads were closer together, but more than that, the pads are just the wrong size. The stencil looks okay and the solder mask opening looks okay (except that it's a little too too wide).

I'm not really sure what went wrong here. Maybe one  person started making a custom library part and PCB Fab error - L2 Pads - Stencil and PCB do not match (stencil correct)someone else finished it, or maybe the component was changed between starting and finishing the library part.

If the stencil photo looks like it's made of cloth - it's not. We just photographed a CRT view of it.

Duane Benson

Need more chocolate.



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