Hello:

Using double reflow with BGA's is no different than other packages with
PBGA's. The BGA from the first side reflow will stay on the board when
the second side is reflowed. Our tests also showed no decrease in
reliability for these parts.



Frank Grano
Principal Process Engineer
SCI Technology Division
(256) 882-4903
(256) 882-4700 Box 4903 - Voice Mail

>>> [log in to unmask] 04/11/00 05:13PM >>>
Technetters,

     We are trying to use BGA on both sides of a PWB. The BGA is a 50
mil
pitch 27 mm x27 mm or 35 mm X 35 mm.
We have some experience with BGA , but we have never used it with
double
reflow. Is there anyone that has this experience?. The only concern is
the
conditions of the BGA from first pass when doing the second reflow.
Any
ideas?,  has anyone deal with this issue?


     Any comments, suggestions will be appreciated



Jorge A Rodriguez
Conexant Systems Inc

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