Hi all,
I want to know the size of micro via for .265mm pad and .4mm pitch WLCSP package.
For the same i want to know whether via on SMD pad is possible if so what will be the dia of that micro via.
IEC standards!!!!
The footprint standard for surface mount devices is IPC-7351 if you are serious about PCB design I would recommend getting to know this standard.
As to microvias, generally based on a 0.1mm pad with a 0.3mm target area...in your case and mine in the past I have done a micro via with a land the same size as the width of the pad for the device and talked very nicely to my PCB manufacturer, it is doable.