Electronics Forum | Mon Jun 19 07:59:01 EDT 2017 | emeto
Hello, I am planning to use a water wash flux. As this is new to me, would you guys share what should I be aware of? I know cleaning PCBs itself presents issues. If you can share your experience so I can prepare better, it would be great.
Electronics Forum | Mon Feb 05 11:31:37 EST 2007 | davef
While you're waiting for others to reply, look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=19507
Electronics Forum | Wed Mar 01 10:46:26 EST 2000 | Robert Hartmann
Kelvin, Thanks for the help. The actual opening size is .440 mm, but I think what you said makes sense. After discussing with the customer, it looks like it is the height which matters, more than the diameter. We have learned that the height of t
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
Electronics Forum | Wed Mar 01 10:46:26 EST 2000 | Robert Hartmann
Kelvin, Thanks for the help. The actual opening size is .440 mm, but I think what you said makes sense. After discussing with the customer, it looks like it is the height which matters, more than the diameter. We have learned that the height of t
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
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
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
Electronics Forum | Tue Feb 29 21:53:46 EST 2000 | Kelvin Chow
Dear Robert, On PBGA assembly, BGA sphere shrinkage number depends to the following factors, a. BGA Sphere size (before reflow) b. Solder mask opening diameter As far as I know, no formular has been established yet. Most of my friends just collect
Electronics Forum | Tue Feb 29 21:53:46 EST 2000 | Kelvin Chow
Dear Robert, On PBGA assembly, BGA sphere shrinkage number depends to the following factors, a. BGA Sphere size (before reflow) b. Solder mask opening diameter As far as I know, no formular has been established yet. Most of my friends just collect
