Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Via in Pad

Yngwie

#21519

Via in Pad | 13 September, 2002

Here's a long survey....Pls help.

1) What is the general feel for via in pad for upcoming designs? - complete Via in pad - partial encroachment - via partially in pad

2) What are the manufacturing bare PCB's related concerns, issues and possible drawbacks for using via in pad? - complete Via in pad - partial encroachment - via partially in pad

3)What are the assembling PCB's related concerns, issues and possible drawbacks for using via in pad? - complete Via in pad - partial encroachment - via partially in pad

4) Will solder flow thru. the vias and cause solder balls on the other side? Please explain different scenarios from your experience. - complete Via in pad - partial encroachment - via partially in pad

5)Are there any reliability concerns and known issues? - complete Via in pad - partial encroachment - via partially in pad

6)Will there be any possible manufacturing related issues regarding solder volume and tombstoning? Please provide any data that is available. - complete Via in pad - partial encroachment - via partially in pad

Please provide different graphical views of possible via in pad solutions if you are aware of with design rules. - complete Via in pad - partial encroachment - via partially in pad

What are the pad sizes we should avoid via in pad for? - complete Via in pad - partial encroachment - via partially in pad

Is it okay to lose soldermask dam using via in pad? Does this lead to cold solder joints? - complete Via in pad - partial encroachment - via partially in pad

yngwie..

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