Electronics Forum | Thu Jun 16 08:31:15 EDT 2005 | jh0n!
The most part I have the most difficulty with is a 16mil QFN. We found that reducing stencil thickness to 4mil, and reducing aperatures for the IC by 20%, and setting local fiducials to the IC helped immensely. We used to get 75% or more bridged ou
Electronics Forum | Wed Jun 22 09:18:16 EDT 2005 | jdengler
Vision #1 only looks at the outline of the part. Only enter this info. Do not enter any info on the balls. Vision #1 won't care if it's coming from a tray. Triple check data entered. Check max and min nozzle size values. Most likey a typo in th
Electronics Forum | Wed Jun 22 09:42:51 EDT 2005 | davef
Not sure what a higher Tg laminate will accomplish. Can't hurt though. Remember, when soldering to Alloy 42, the surface is 42% nickel. So, you need to raise the reflow temperature some 15 to 20*C over what is needed for copper. Also, sometimes All
Electronics Forum | Thu Jun 23 10:36:04 EDT 2005 | stepheniii
I think the single most important thing will be to maintain positive pressure in the room. All the air filtering will not be able to keep up if dirt is blown into the room everytime a door is opened. The next would be to control as much as possible,
Electronics Forum | Tue Jul 19 06:07:30 EDT 2005 | GS
Yes Rob, I would like to know the type of metal finisching like JST097 or IPC-1066 or IEC .... suggest to do. I would like to avoid i.e. to get Bismuth finish on components terminals that I still have to solder with alloy containing Pb. Also to ha
Electronics Forum | Sat Jun 25 00:52:31 EDT 2005 | ktron
Hi all, Recently I had problem with printing the lead free solder paste, almost every board has bridging especially on the fine pitch locations. Anyway this problem never happens when we use leaded solder paste. So I would like to ask if there are a
Electronics Forum | Wed Jun 29 17:35:46 EDT 2005 | Hiram
Hi all, Does anybody have any comments on the lead-free alloy SN100C from AIM solder? I am in the process of selecting the "right alloy" for our lead-free wave solder machine. We manufacture A/V equipment. I appreciate your feedback as usual. Hir
Electronics Forum | Mon Jul 11 07:49:06 EDT 2005 | davef
Approaches are: * PCDATAK sells [through distributors and hobbist sites] inexpensive layout software and plastic sheets that you run through a copier and then use to image the traces on the bare board. Since you have the software, all you need is th
Electronics Forum | Fri Jul 08 10:38:15 EDT 2005 | patrickbruneel
Hi Inds, Don�t forget to give us an update in about 3 months so we can all learn something from real life experience. Common sense tells me that the alloy will be out of balance in 3 to 6 months (depending on volume and board/comp.plating) but I can
Electronics Forum | Wed Jul 06 04:32:27 EDT 2005 | aj
Guys, I have a Dynapert MPS2500 in house that is taking up space. The machine is still in working order but we have invested in new machines. There is also the majority of a stripped down machine in stores also. Anyone interested in taking this plu
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