Electronics Forum | Mon Feb 02 05:08:37 EST 2004 | heccles
Anybody seen problems with potted trimpots and reflow soldering - specifically poor wetting as a consequence of lead contamination from the potting compound. Regardless of reflow profile used (MIL -STD -202) cannot get a good joint formed ! If you us
Electronics Forum | Thu Feb 12 10:19:46 EST 2004 | Bryan
Hi all, These days our customer asks us to figure out ,during reflow,the BGA ball and solder paste,which will first melt? I think it's very hard to get the rusult.coz I think it'll vary at diffrent part of the BGA,and how can this affect the perf
Electronics Forum | Fri Feb 27 12:33:49 EST 2004 | Gabriele
Some literature recommand to increase TG of PCB when Soldering Lead Free (ie.SAC allow Reflow and Wave ), some literature do not mention it, some recommand it only in case of large panels, etc. According to your experience,what is the best practice
Electronics Forum | Fri Feb 27 12:35:13 EST 2004 | Gabriele
Some literature recommand to increase TG of PCB when Soldering Lead Free (ie.SAC alloy Reflow and Wave ), some literature do not mention it, some recommand it only in case of large panels, etc. According to your experience,what is the best practice
Electronics Forum | Tue Mar 09 03:52:56 EST 2004 | vantott
what you have provided are the settings on the oven and not the temperature profile (which represents the actual temperature experienced by the cards as they pass thru the chambers). Usually, solder paste manufacturers provide recommended specs for
Electronics Forum | Thu Mar 11 12:45:40 EST 2004 | Daniele
Hi I have a question about proper installing thermocopule to PCB. I have thermocouple which consist of two wires and they are conected at the end by solder bead. I would like to use adhesive tape to connetct it to the PCB. Should i remove solder bea
Electronics Forum | Thu Mar 18 23:04:49 EST 2004 | martz
A lot of component vendors already shifted to Pb-free products but our process is still using 63Sn/37Pb solder paste and SMDs. What would be the result if we introduce some Pb-free components to our current process (i.e without changing the reflow p
Electronics Forum | Mon Mar 22 19:46:17 EST 2004 | pdeuel
The bottom side is going into reflow somewhare near melting point of solder. Reduce bottom side temprature. Get a good mole so ramp and soak tempratures can be checked on bolth sides of the PCB. The object is to keep bottom side parts from approching
Electronics Forum | Tue Mar 30 02:58:55 EST 2004 | Grant Petty
Hi, Thanks for the ideas. With the solder mask curing problems, can you normally wipe off the white residue, as we can do this on our boards with our fingers. It's almost like the surface of the board has a "wet dried up" look to it, and it's a smok
Electronics Forum | Wed Mar 31 20:49:11 EST 2004 | marcowong
We are trying to buy used double wave solder and ICT machine and we need some advice on selecting the machine and things to be cautious with. It will be greatly appreciated if someone can offer us good suggestions that will help us to minimise mist
