Electronics Forum | Fri May 09 14:56:37 EDT 2008 | markhoch
The paste dispensers work well as long as the humidity in your shop is properly controlled. If it gets too humid, and the paste gets "soupy", then it will take less air pressure to dispense it onto the stencil. Paste dispensers use a controlled, pre-
Electronics Forum | Wed May 07 14:43:45 EDT 2008 | patrickbruneel
This is strange EPA is not out to fine companies but to enforce regulations. We are in the solder and flux business and get audits at least twice a year. We are not perfect (yet) so there are times that we have non compliances. When that happens we g
Electronics Forum | Sat May 17 09:12:50 EDT 2008 | davef
Lead-free means expensive tin. Tin is an excellent solvent. So, metal parts in contact with molten tin must be expensive enough to resist that nature of tin. To learn more about this: * Search the fine SMTnet Archives * Look here: "Liquid Tin Corrosi
Electronics Forum | Tue Jun 03 01:03:04 EDT 2008 | daxman
Hi, I think what you are describing is a half-etch QFN, which causes the 3 mil gap. In our process, we don't require solder to bridge this gap as it's internally connected to the bottom lead. I'm not sure if this is the question you're asking, but
Electronics Forum | Sat May 31 09:44:56 EDT 2008 | gregoryyork
looks like the board has gone through and not actually fluxed properly,trying hand applying and it should fix it. IF it still occurs put the pallet through without pcb and without flux and see what residues come off in the wave. residues you are seei
Electronics Forum | Thu Jun 12 03:37:05 EDT 2008 | benefon
It is also possible to etch the barcodes directly on the PCB by using a laser. The solder resist mask is easily burned by laser and if there is copper underneath the contrast is quite good. The contrast is satisfactory even if there is no metal under
Electronics Forum | Thu Jun 12 23:41:51 EDT 2008 | pickyplacer
charliem, thanks for the reply. I have to admit that I find writing barcodes with a pen a little difficult. AR, I still look at writing directly onto the PCB. But seems those systems are really expensive. I will look further into the normal label
Electronics Forum | Wed Jun 11 13:11:33 EDT 2008 | namruht
We are currently completely building lead based assemblies. We are going to start doing our homework based on Management request. I have a pretty strange question that I was asked but really did not have an answer to. Can a Lead-Free assembly have a
Electronics Forum | Thu Jun 19 04:16:11 EDT 2008 | more_sunshine
actually this is my little problem, i don't know about the material except that it comes in a paste form and it has to be diluted with acetone and it has a green color. i wish that the compounds used to make a solder mask aren't that numerous to be d
Electronics Forum | Fri Jun 20 14:03:33 EDT 2008 | wavemasterlarry
LiSten my Consultancy Firm has branched out into all matters not just wave related but related to any type of production processees. I myself not only consult in a wavemaster soldering expert role but also am willing to work in an operator type of ca
