Electronics Forum | Thu Aug 31 18:48:25 EDT 2023 | SMTA-64387600
I presume you have a local flux spray with your selective solder machine (I have no idea what you use). If I have a group of leads in close proximity like this, I would be trying to design a well and nozzle setup that I can use to solder all the joi
Electronics Forum | Mon Oct 22 15:41:39 EDT 2007 | davef
Bruno The real question about your troop using Kester 951 wave solder flux on boards is: how is the flux applied and controlled. See, when you apply this flux with your wave solder fluxer, it is ideally applied in a metered fashion with your fluxer
Electronics Forum | Thu Jan 14 16:32:58 EST 1999 | Dave Jurena
Hi all, I thought I'd use this forum to ask a couple general questions on fluxes for manual operations: First - Is it OK to use a wave soldering type flux (specifically OA)? Thinking about activation temperatures and the ramp rate of the wave solder
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 Oct 23 16:01:18 EDT 1998 | Earl Moon
| I need some info on how to stop the bridges I'm having on | radial and axial parts that are in the same place on every board. I'm also having problems with sot-25 bridging. I'm using a Electrovert E-pak. I tried leveling the machine,solder pot, an
Electronics Forum | Sat Dec 30 04:23:50 EST 2023 | 012band
I have used LTS (Sn57.6%Bi0.4%Ag) solder balls for soldering on Ni/Au pads, and I have observed a wrinkle pattern on the ball surface. When you attempted soldering on CuOSP substrate pads under the same conditions, the surface appeared normal. Additi
Electronics Forum | Mon May 24 05:53:24 EDT 2004 | johnwnz
Here's an interesting fact, some pastes just don't wet as well as others!.. there I've said it and now people will complain but that's life. Some pastes are formulated to run in air, some in N2, soem are specifically designed to be more aggressive fo
Electronics Forum | Thu Feb 19 12:45:05 EST 1998 | Earl Moon
| I have an Electrovert Ultrapak 445 Wavesolder machine with 3 IR preheat zones and a single wave with omega wave. | I want to run a DOE (Taguchi) to determine the optimum settings for soldering both single-sided and | double-sided boards. Can any
Electronics Forum | Mon Oct 26 16:01:33 EST 1998 | tom Gervascio
| | I need some info on how to stop the bridges I'm having on | | radial and axial parts that are in the same place on every board. I'm also having problems with sot-25 bridging. I'm using a Electrovert E-pak. I tried leveling the machine,solder pot
Electronics Forum | Wed Jan 23 19:44:45 EST 2008 | hegemon
In addition to the pre-emptive steps mentioned above, in my experience there are certain BGA package designs that seem more prone to that corner bridging. I have seen some packages that will essentially "curl" down at one corner as the package begin
