Putting vias in surface mount pads in not a good practice, yet it is sometimes a design requirement. Here are all of my Via in Pad postings in one convenient place. Yes, you can see them all by clicking on the "Via in Pad" category, but then you would have to scroll through all the text.
- Via in Pad Category. About the category.
- LED via-in-pad. An example illustrating the effect vias can have on discrete components.
- A Little Pad in That Via. There is a better way...
- Passives and Via in Pad. It's not just the big parts that have problems.
- Via in BGA Pad Again. Just another example.
- Plugged Micro Via in Pad. Flatness is important too.
- Plugged or Capped Via in Pad. Surface flatness - one more thing to consider.
- Silver Via Problems. Sometimes Immersion Silver vias can't be soldermasked over.
- Microvias, Blind and Buried Vias. The right way to deal with vias in BGA or QFN pads.
- BGA via near pad. Vias can cause problems when near too. Not just when in.
- Soldermask Via Caps. How to properly mask your vias.
- Vias in BGA Pads. If you must, here's some advice.
- Via in Pad Methods. Another option for putting vias in QFN pads.
- Filling Via in Pad - Assembled. Part three of a cautionary tale about a difficult "save" of a near worst-case board.
- Filling Via in Pad - After. Part two of a cautionary tale about a difficult "save" of a near worst-case board.
- Filling Via in Pad - Before. Part one of a cautionary tale about a difficult "save" of a near worst-case board.
- Proto Via in Pad. Issues related to putting vias in pads.
- BGA Via in Pad. About BGA pads and vias.
- Via in Pad. A bit of information on vias in pad.
