Electronics Forum | Wed Feb 23 08:15:57 EST 2005 | davef
We've talked about this previously. Search the fine SMTnet Archives. For instance: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=31767
Electronics Forum | Thu Feb 24 08:29:01 EST 2005 | davef
We have done some work with conductive adhesives. The main lesson is: They do not adhere well to solder. * For components, a silver-palladium or gold end termination is recommended. * For substrates, gold over nickel should work well.
Electronics Forum | Wed Feb 23 15:57:36 EST 2005 | jh0n
Pretty new to this... How long should you expect nozzles to last? I'm noticing that they're continually clogging with solder paste, leading to TONS of bad picks/rejections. How often should I expect to be replacing them, and why are they clogging
Electronics Forum | Thu Feb 24 11:15:04 EST 2005 | TomA
CJ, Try contacting your current SnPb supplier. Most, if not all suppliers offer lead free products.
Electronics Forum | Fri Feb 25 09:24:16 EST 2005 | pjc
Here are some of the leading No-Pb solderpaste companies: www.indium.com www.kester.com www.alphametals.com www.aimsolder.com www.multicore.com www.qualitek.com They'll all send free samples.
Electronics Forum | Fri Feb 25 12:04:21 EST 2005 | davef
Land grid devices [ie, BCC�, LGA, QFN, MicroLeadFrame�, etc] are essentially BGA devices with the balls removed and with no solder on the pads. Search the fine SMTnet Archives for background discussion.
Electronics Forum | Thu Mar 10 04:08:09 EST 2005 | Rob
It has benefits for solderability too, but costs rather a lot of money to convert your machine & you have to buy in nitrogen on a regular basis (unless you have a generator).
Electronics Forum | Wed Mar 02 06:15:56 EST 2005 | adlsmt
Russ, are you using any reduction on your stencil aperatures? How much for what type of parts? We seem to have to many problems with resistor network aperatures clogging. How well does this paste release from small aperatures?
Electronics Forum | Wed Mar 02 08:53:58 EST 2005 | jdengler
I like Alpha Metals OM-5100. Very long stencil life with good results. Jerry
Electronics Forum | Wed Mar 02 09:28:02 EST 2005 | bobsavenger
I am looking for images of solder paste defects like Past stringing, paste gorging and dog ears. I would also like to have the avi file to show how tombstoning happens in the reflow oven. Thanks Bob
