Electronics Forum | Sat Feb 14 12:33:30 EST 2004 | agp
We are currently experiencing solder bursting in one of our smt reflow lines. Burst as small as 5mil diameter are messing gold fingers of the pcbs. Anybody who have experienced same problem? Would appreciate any suggestion.
Electronics Forum | Sat Feb 14 20:30:55 EST 2004 | Dean
What are your preheat rates? Try a slower ramp. A typical insurance policy is to kapton tape the gold card edge. If your problem persists, try baking the boards to drive the moisture out.
Electronics Forum | Mon Feb 16 06:26:14 EST 2004 | Chris Lampron
Jun, What is your RH in the SMT area? Is a different paste used on this product than on the other lines. Could your paste be absorbing humidity from the air and discharging the moisture at reflow? This will cuase what you are describing. Good Luck
Electronics Forum | Tue Dec 14 08:01:14 EST 2004 | paul_fisher
Our paste is no new we have used it before [Cobar no-clean paste]. The solder joints look like they are bursting out salty looking crystals. Maybe the board cleaning is a red herring in that if the boards are clean it stops this crystalisation travel
Electronics Forum | Thu Jun 30 13:49:36 EDT 2005 | John
I had the same incident before, and like GS pointed out, the degassing from the via under the component was responsible. The via was covered with solder mask, but it burst open during the reflow.
Electronics Forum | Tue Nov 14 01:28:10 EST 2006 | CHITRA
When we reflow solder SMT PCB with SMT Electrolytic capacitor- 5MM sized ,the capacitor gets burst and all other adjacent and surrounding components also get disturbed. What could be reason for this. What should be done to avoid this problem.
Electronics Forum | Thu Oct 22 22:09:43 EDT 2015 | myleb
Hi Nhel, You meant the IO board in the Feeder Cart burst, right? Very interesting case here... Thanks for sharing.
Electronics Forum | Wed Feb 18 12:18:28 EST 2004 | babe
Sometimes this is related to oxidized paste or paste that has sat onthe board too long before reflow. However most likely this is related to your reflow process. either too slow or too fast of a reflow ramp rate. Heating up an assembly too quickly wi
Electronics Forum | Wed Jun 27 14:23:20 EDT 2001 | Claude_Couture
I just fell off my chair laughing, reading the above... If I may add my two cents, I would give the customer the option of remote controlled collars for the operators. When they are too slow or make a mistake, ZAP! short burst of high voltage... Sam
Electronics Forum | Fri Oct 08 06:06:09 EDT 1999 | Wayne S.
hey dude pay scale depends on experience, size of the job market for operators, dont mean to burst your bubble but training is available for anyone who wants to be an operator. By the way if your from the Mass. area email me. wsanita@smtnet.com |
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