We have a member who indicates that components (resistor networks) are 
outgassing during assembly, causing small and large pinholes and full 
bubbles on the board. If they reflow the boards a second time, the holes 
and bubbles go away, but they are concerned about the long-term 
reliability and possible contamination of the lead. (The end-product is 
Class 2 medical equipment.)

Has anyone seen this before, and what types of problems might this cause 
long-term?

Mike Buetow
IPC Technical Staff
7380 N. Lincoln Avenue
Lincolnwood, IL 60646
P: 708-677-2850, ext 335
F: 708-677-9570
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