Can I put a via on a pad?
Via in pad is the design practice of placing a via in the copper landing pad of a component. Compared to standard PCB via routing, via in pad allows a design to use smaller component pitch sizes and further reduce the PCBs overall size.
What is a via pad?
In PCB design, via refers to a pad with a plated hole that connects copper tracks from one layer of the board to other layer(s). High-density multi-layer PCBs may have blind vias, which are visible only on one surface, or buried vias, which are visible on neither, normally referred to as micro vias.
Should vias be tented?
Vias that are also in close proximity to SMT pads should also be tented. This will prevent the solder paste from wicking into the via and creating a poor solder joint. This is especially important with dogbone style BGA escaping. Vias are tented to prevent solder paste from flowing into the via.
When is via in a pad a bad thing?
Via in pad is a bad thing if your via’s hole occupy more than 30% of the pads area AND if your pad is too small too! If your pad be too small and you use mechanical drill this might blow out the pad. In this case your manufacturer may recommand to you that use laser drilling instead of mechanical drill and it surely cost you more.
What does via in pad PCB design mean?
Via in Pad PCB Design. Via in pad is the design practice of placing a via in the copper landing pad of a component. Compared to standard PCB via routing, via in pad allows a design to use smaller component pitch sizes and further reduce the PCBs overall size.
Is it bad to drill via in pad?
Myth: via-in-pad is a bad practice. Via in pad is a bad thing if your via’s hole occupy more than 30% of the pads area AND if your pad is too small too! If your pad be too small and you use mechanical drill this might blow out the pad.
Why is the via hole inside the pad?
With via in pad, the drill hole for the via is inside the pad. This means you can not tent the via with soldermask. Leaving the via open to allow the paste to wick into the barrel will cause reliability problems during manufacturing.