Electronics Forum | Mon May 07 10:27:40 EDT 2007 | colormaker
The spray bottle puts more flux on the board but I am not sure how to measure ? I just got the Novastar 12S and its very difficult to set up. When I fix one problem another one show up. When I do get good results I dont make changes and then after a
Electronics Forum | Mon May 28 07:50:08 EDT 2007 | pavel_murtishev
Good afternoon, Have you checked placement accuracy? Is it installed without shift prior to reflow? Are you sure it shifts in the oven? I believe tension cannot cause QFP shift since QFP has quite low self centering ability. Such kinds of shifts are
Electronics Forum | Fri Jun 22 09:56:24 EDT 2007 | crashoveride
uhm.... we're not doing this solderability test that often... it's more likely of a run-to-failure, lolz.. anyway, i think this should be quality department's problem since they do the production monitoring (In- line QC), Material sampling and gatin
Electronics Forum | Wed Aug 01 11:51:05 EDT 2007 | patrickbruneel
With the rising cost of lead-free, reliability and many other issues I�m sure �it� will get some serious reviews by OEM�s. Comparing this technology with leaded soldering I agree with you Chunks. But it sure does make a whole lot more sense than lea
Electronics Forum | Wed Feb 20 12:22:14 EST 2008 | tonyamenson
iv40, I don't suppose you know/remember what base material you were using that caused the problem and what material you switched to was, do you? We just pre-bake all our lead free PCBs as a precuation but I would like to remove the process if I can
Electronics Forum | Thu Aug 23 11:24:16 EDT 2007 | hussman
Welcome to Chine. Your best bet is to specify the type of mask you want and the type of finish you need. If not, they run what ever they have available. You may want to contact you board vendor and find out what they can offer. That's what we had
Electronics Forum | Mon Nov 05 02:51:48 EST 2007 | omidjuve
our boards have many smd pads that has vias under them so when the screen printer wants to print the solder paste on it , it will penetrate through the via to the bottom side of the board and cause many problem for us . i want to know that is it sta
Electronics Forum | Fri Nov 23 14:55:11 EST 2007 | aj
A couple of points - 1.I would recommend that you get your solder paste supplier involved as this could be their issue , let them do some research into proving that its not ! 2.Is the problem happening on this product only or do you see it on other
Electronics Forum | Mon Nov 26 22:05:34 EST 2007 | shy
currently i'm open my stencil aperture is 80% from the land pattern. is this will cause insufficient solder at the terminal component or not? the stencil thichness is 6mil and the board run using SMT pallet which i consider there will be no option f
Electronics Forum | Thu Dec 06 11:19:34 EST 2007 | samir
AMEN TO THAT! The only problem is...what's left of U.S. Electronics Manufacturing is Contract, and as most of us in the CM world can attest to, our customers violate DFX guidelines left-and-right. I agree, also, that the PCB layout guy who also kno
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