Electronics Forum | Tue Mar 09 20:08:08 EST 2004 | davef
Warping BGA are the usual cause of shorts in the corners and are usually caused by the reflow profile. BGA have a natural tendency to warp due to CTE and package thermal mismatch, as you have seen at rework. The PBGA will go from a bowl shape to an
Electronics Forum | Wed Feb 14 21:14:45 EST 2001 | davef
BGA Shorting 1 Damaged mask in between the BGA pad and via on the substrate. 2 Poor print registration. 3 Poor via segregation from the pads? Are they tented or is there just a dam in between? 4 Review the profile. You can run into a number of p
SMTnet Express, January 2, 2020, Subscribers: 33,306, Companies: 10,954, Users: 25,467 Temperature Cycling and Fatigue in Electronics Credits: DfR Solutions The majority of electronic failures occur due to thermally induced stresses and strains
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/trimming-heels-under-the-component-body_topic12_post3020.html
. I am thinking thermal stresses are probably not a concern as long as the solder and package shrink a little when they cool off
