Electronics Forum: oxidized and balls (Page 1 of 30)

QFP w/ oxidized leads

Electronics Forum | Thu Mar 28 11:06:49 EST 2002 | Tony Fox

Our company carries out this service for major OEM and CEM's Our web site address is http://www.retronix.co.uk Every device after it has been re-tinned gose throught a vision inspection system were it is inspected for coplinarity etc, we also re-ball

solder balls and flux

Electronics Forum | Tue Feb 29 10:14:02 EST 2000 | Robert Hartmann

My company is just getting into the flip chip packaging arena. We are putting in a prototype/small volume wire bond PBGA line. We have some questions with regard to choosing solder balls and cleaning of flux. 1) Is there a formula for the shrink

solder balls and flux

Electronics Forum | Tue Feb 29 10:14:02 EST 2000 | Robert Hartmann

My company is just getting into the flip chip packaging arena. We are putting in a prototype/small volume wire bond PBGA line. We have some questions with regard to choosing solder balls and cleaning of flux. 1) Is there a formula for the shrink

Re: solder balls and flux

Electronics Forum | Wed Mar 01 16:59:44 EST 2000 | Dave F

Robert: Expect a 0.033" raw ball to be within 0.022" of the pad, after reflow. To be clear, that�s not a matter of shrinking by 33%. The volume of solder on the pad is the same as the volume of solder in the raw ball. It�s just that the solder is

Re: solder balls and flux

Electronics Forum | Wed Mar 01 16:59:44 EST 2000 | Dave F

Robert: Expect a 0.033" raw ball to be within 0.022" of the pad, after reflow. To be clear, that�s not a matter of shrinking by 33%. The volume of solder on the pad is the same as the volume of solder in the raw ball. It�s just that the solder is

Palladium finish and solder balls

Electronics Forum | Thu Jun 27 21:28:42 EDT 2002 | davef

You're correct that the Ni/Pd termination seems to have something to do with you solder balling. It could be related to the interaction between your paste and the Pd. I assume these are really 'fines' rather than 'balls'. Things that come to mind a

Soldering robot and solder balls

Electronics Forum | Tue Jun 20 15:08:30 EDT 2017 | ranap121212

Hello I have the problem with selective soldering on the robot. Thin balls appear on the laminate. The tin sometimes shoots...? and then the balls are a few millimeters from the soldering point. I tried up or down with temperature, but it did not wor

Re: solder balls and flux

Electronics Forum | Wed Mar 01 16:58:03 EST 2000 | Dave F

Robert: On your balls: Solder suppliers make several "standard balls" and can advise you. On your cleaner: Recycling water / direct to drain? Most batch cleaner suppliers can advise you on recycling and filtering systems to keep you out of troub

Re: solder balls and flux

Electronics Forum | Wed Mar 01 16:58:03 EST 2000 | Dave F

Robert: On your balls: Solder suppliers make several "standard balls" and can advise you. On your cleaner: Recycling water / direct to drain? Most batch cleaner suppliers can advise you on recycling and filtering systems to keep you out of troub

Palladium finish and solder balls

Electronics Forum | Fri Jun 28 04:10:24 EDT 2002 | robbied

Great, now at least I have an explanation of sorts. Thanks, Dave.

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