Bill D Forwarded this message:

"I am trying to locate information relating to the actual usage of Plastic 
Ball Grid Arry (PBGA) devices. I am interested in info relating to the 
mounting, temperature cycling, problems, and long term field performance of 
this type of device.

Am also searching for data that illustrates whether plastic microcircuit 
packages will support the growth of a fungus, or not. Should I be 
concerned, or not, and why....?????


JOHN E. NORTHRUP (607)-770-3173 [log in to unmask] "


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Bill 
Dieffenbacher                 Tel. (607)770-2961 Lockheed Martin Control 
Systems    Fax. (607)770-2056
600 Main St.  Room R52F            email [log in to unmask] Johnson City, 
NY  13790
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My reply:  A good technical source for information would be:

Plastic Ball Grid Array (PBGA), Document # AN1231/D published by Motorola.  
  

Motorola may have some additional reliability data they could share.  

Bob Jacubec
E-mail:  [log in to unmask]

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