Electronics Forum | Thu Jan 05 16:39:47 EST 2006 | pjc
Electrovert has a new nozzle design called UltraFill. It was designed specifically for Pb Free applications and generates about 40% less dross than the previous Lambda design. UltraFill can of course be used for Sn/Pb alloys. The name UltraFill is fo
Electronics Forum | Sat Dec 17 08:07:06 EST 2005 | grantp
Hi, What worries me is that a lot of people speak about what they have heard, but there is no firm facts on exactly what the situation is. I did a seminar on lead free a while ago, and was told that going lead free on the components while running l
Electronics Forum | Thu May 10 19:19:41 EDT 2007 | rgduval
Wayne, I haven't seen anything indicating that Gold Immersion is necessary for lead free... However, it is my companies preferred finish for lead free assemblies. We've taken this stance for the following reasons: 1. Better solder quality on th
Electronics Forum | Wed Mar 15 11:34:28 EDT 2023 | proceng1
I'm sure this isn't the same situation, but we did have a selective solder machine with crazy dross and solder ball build up. Turns out the operator switched the low pressure nitrogen line used for solder level and the high pressure nitrogen line fo
Electronics Forum | Tue Jul 28 02:28:48 EDT 1998 | Bob Willis
The causes for solder on gold are: Paste wash offs Dirty stencils Dirty under stencil cleaning cloths/no solvent Poor handling The most common reason is wash offs when there is a couple of balls left on the tabs and they reflow. With correct profile
Electronics Forum | Sat Jun 24 07:23:06 EDT 2017 | tch
You will need to preheat the boards for a lead free selective solder process. A preheat module is critical for any wave or selective solder process, if you don't get the board preheated properly the solder is going to resist flowing to the top of the
Electronics Forum | Fri Jun 25 16:54:25 EDT 1999 | C.K.
| | | Dear John/Earl | | | | | | Thanks for your clarifications. To me also the problem does not seem to be linked with the PCB. The Pre heater temp. is set at | | | 450 degree C. We are using Alpha Aq. cleanable flux. Can you elaborate on the
Electronics Forum | Fri Jan 30 16:07:45 EST 1998 | Srik Maganti
We are in process of building a product which is a double sided board ( SMT ) and PTH ( topside ). This particular product has a BGA on the topside of the board, which has a kind of plated top on the die. I have heard some companies have had a probl
Electronics Forum | Tue Nov 04 12:10:56 EST 2014 | richearle
Hi, I've got a Microline 200TF - I guess it's a 1980's machine. It's gone pop and I cant fix it without a circuit diagram (there's several pcbs in it with a variety of relays, triacs and what-not). If anybody has a circuit or any othe rinfo on it I
Electronics Forum | Fri Feb 26 23:54:48 EST 2016 | padawanlinuxero
Hello guys Guys I am looking for a IPC 4552 can someone help me with a digital copy, we are a small company and having lots of problems with a ENIG board that goes thru the solder wave and sometimes the golden pads, well they dont look golden more l
