Our board supplier is having problems testing one of our board designs
which have several .8mm (.031 pitch, .024 pad dia.) 144 pad and .75mm
(.029 pitch, .016 pad dia.) 48 pad microBGA devices in the design.

They claim that they have to use their Probot flying probe tester, which
is very time consuming and very expensive.

My question is: Are the microBGA designs too tight to utilize "standard"
or even "double" density test  equipment?  With microBGA's becoming so
"common" (?) there must be a way to cost effectively 100% net list test
bare PCB's.  If not, does anyone see a new/iimproved test technology on
the horizon that does allow fast and cheaper testing of these designs,
and when will it be available?

Thanks.

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