Via in PAD
Connect via in solder pads is a big trouble in pcb assembly process.
Especially,when the via in BGA pads,
But the designer often based on its design can not achieved.
In face,the electronic products is getting smaller,
printed circuit board going to smaller, high density and more layers,so,many CAD Engineers( PCB Layout engineers) design the via in pads.In particular,small BGA ball space of BGA Pads,there is no enough place
Could place the via holes.It is disaster for SMT engineers.With the improvemet of via in pad technology,The solder problem can be solved.
Smallest Hole:4Mil(Laser) 6Mil(Machine)
Smallest BGA: Holes+6Mil
Aspect Ratio:1:1(4Mil) 12:1(other)
Via in BGA
Finished Board Thickness:62Mil