Electronics Forum | Fri Sep 17 03:13:00 EDT 2010 | grahamcooper22
In HASL pcb coating you need to fully coat the pads with solder and then blow off any excess solder to leave a nice coating on each pad. Generally pcb manufacturers try to give you a flat pcb pad to make your solder paste printing more consistent. To
Electronics Forum | Thu Apr 19 16:54:32 EDT 2007 | flipit
I don't suggest using Pd/Ag or Ag/Pd terminated components unless you are forced to use them. You often see a line of demarcation that suggests a poorly wetted solder joint. I have had bad experiences with Pd/Ag terminated capacitors. Even when so
Electronics Forum | Fri Jun 09 05:18:07 EDT 2006 | Rob
Hi Shawn, that you're baking the components makes me think that they are either old, or have been sitting around for a while (or none of the above & you are really dilligent!) Whilst baking will sort out the MSD issues (such as popcorning) it will
Electronics Forum | Tue Jun 13 17:16:44 EDT 2006 | slthomas
"I believe I was the one who stated in an old post that prying the leads is rediculous." I have been down this road as well. The prez of my previous employer decided that because he could pry .012" leads off the pads with a screwdriver that we had a
Electronics Forum | Wed Apr 04 03:07:16 EDT 2007 | pavel_murtishev
Good morning, Problem definition Poor soldering of thermistors with Ag/Pd termination Background Process: lead free reflow soldering Paste type: Multicore LF300, SAC305 Component type: 0805 chip thermistor, Ag/Pd termination PWB finish: immersion A
Electronics Forum | Wed Jan 30 17:48:31 EST 2002 | davef
Expanding on a previous poster's comments ... Vapor Phase Soldering. A solder reflow technology that uses a heated solvent to melt the solder. Buried deep in the recesses of the SMTnet Library is �Terms & Definitions�. We started using vapor phas
Electronics Forum | Mon Dec 17 11:55:08 EST 2007 | chef
I recently had the same problems, solder bridges on every thing I made, different customers boards, etc. I wave with no-clean flux. As I sorted out problems (pin holes, blow holes, splatter, etc.) I found a lot of variable factors. I changed flux,
Electronics Forum | Thu Jun 08 23:26:28 EDT 2006 | Shawn Vike
We are a small company, reletivly new to doing our own SMT (1 year) and we are having an issue, I think. We manufacture many board with no problems, but we have one that constently defeats us. This particular PCB has ENIG finish, and we have had th
Electronics Forum | Fri Jun 09 12:13:11 EDT 2006 | Chunks
Rob and Pete are both right. "We" had the same problem, with just one manufacturer of the same style QFP (don't want to name names here). We had the same style of QFP from a different manufacture right next to the problematic one on about 3 product
Electronics Forum | Thu Jul 02 11:11:31 EDT 2020 | dontfeedphils
Most select solder machines I've dealt with use conductance sensors to detect solder.
