Electronics Forum | Thu Mar 20 09:01:33 EDT 2008 | meritajs
Thanks Greg Our main problem is that we are putting small number PCB through, about300 PCB, size180*250. Such number order our customer in week. In result we got such high solder consumption and high production cost. We will tray to use antiacidant.
Electronics Forum | Wed Aug 10 13:31:05 EDT 2005 | patrickbruneel
Joseph, In addition to my previous post The reason why the cracks are most visible at the transformer location is due to the weight of the transformer. The stress on the boards is the highest because the weight of the transformer will warp the board
Electronics Forum | Fri Mar 21 08:39:38 EDT 2008 | lococost
If you are saying you're going through 1kg/h while only producing 300 pcbs a week and the rest of the time the machine is standing still, then 1.there is something seriously wrong with your machine or 2. check if an operator is suddenly covered in sh
Electronics Forum | Wed Aug 10 09:01:15 EDT 2005 | fctassembly
Hello Joseph, Sorry for the bad news but microcracking is a well known potential condition occuring with the SAC305 alloy. Microcracking is a condition being seen with many joints soldered with the SAC305 alloy. It is technically a shrinkage cavity
Electronics Forum | Sat Feb 12 09:33:45 EST 2005 | davef
Here's one thread from the fine SMTnet Archives: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=30307
Electronics Forum | Wed Jul 06 18:05:57 EDT 2005 | Dave
lead free transition. want to use lead free parts w/ lead solder.. any issues I should be aware of???
Electronics Forum | Wed Jul 06 18:11:37 EDT 2005 | russ
Please search the archives as this has been discussed on many occasions. Everything should be fine except for BGAs which will require a higher temp of 235C at the peak in reflow.
Electronics Forum | Tue Sep 13 08:45:51 EDT 2011 | rgduval
Lead free solder does tend to resemble cold solder joints after processing. Generally, this is acceptable. The latest IPC 610 has pictures of acceptability of lead free solder joints, which you can use to compare to the joints that you are seeing o
Electronics Forum | Tue Aug 31 12:01:26 EDT 2004 | russ
Kris, this practice has gone on for years. I have never heard of any problems associated with this. I have heard "grumblings" about tin lead parts being processed with lead free paste, but have seen or heard of no data to support. Russ
Electronics Forum | Mon Sep 12 10:41:50 EDT 2011 | processmxli
Hi All We have run SMT process with SnPb but we’re installing some lead free components like capacitors and resistor lead free. After the reflow oven all components have good appearance with solder join sheen. But the lead free components the solde
