Rumors have it that Glob-Top BGA gave poor coplaranity. Some studies 
indicated that  glob top has significantly lower reliability than over 
molded BGA. I suspected that the high CTE and  shrinkage characteristics of 
the material  are the most significant contributor to this effect.  Anyway, 
have you guys seen anything coplaranity in real life manufacturing?

Thank you in advance for your responses!


:-->






***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************