Electronics Forum | Fri Feb 09 11:48:09 EST 2007 | realchunks
0.25mm tilt? That's pretty small depending on you BGA size. Is it failing? Or just your Q.E. being anal? What size BGA we talking about? What ball count? Just one board? Maybe cheaper to just repair. Now assuming there is NO part under the BGA
Electronics Forum | Thu Apr 22 08:43:25 EDT 1999 | Michael N.
| | I'm having problems with trying to get a good solder joint using a Ceramic PCB. We are using AMTECH hi-temp solder (ws-486 96.5/3.5ag). My profile looks great and I used the recommended profile from Amtech with a few adjustments. My max temp is a
Electronics Forum | Wed Feb 21 14:14:11 EST 2007 | rgduval
Hi, Bill, Lead-free solder and paste manufacturers will be a great resource for you during the transition; they've tested their products extensively, and their application groups have been able to help me through the biggest changes. There are a fe
Electronics Forum | Tue May 30 21:06:57 EDT 2000 | Dave F
Thames: Welcome. Consider Rev C. It's current and has "better" descriptions. Consider a course. I believe IPC is doing a tourof A-610 and J-001 classes. Different problems have different root causes. For instance: * Cold solder: Moving the c
Electronics Forum | Mon Mar 09 10:12:43 EST 1998 | Justin Medernach
| Cold Welding | I'm presently doing a project on reflow profiling. | I came across this expression. Can someone please give me a definition. | Best Regards | Tom Mc Grath Tom, I think what you are referring to is also called cold solder. You have
Electronics Forum | Fri Sep 08 11:32:19 EDT 2006 | darburch
Solder joint too shiny, clock wrong color, she's got my chair, radio too loud, can't hear the radio, I'm too hot she's too cold change the A/C.Kindergarten wasn't this petty.OH, wait this is a heath and safety issue, I need the day off with pay. Why
Electronics Forum | Tue Sep 25 12:50:13 EDT 2001 | mparker
Since you are mostly concerned about the flux and suspect an application issue, you need to do a few things to validate whats going on. 1. Forget about speed of processing, length of time to do the job. Focus on accuracy first, then speed. with that
Electronics Forum | Tue Dec 26 11:09:16 EST 2000 | acahill
High temp paste or not, I feel it's all up to the oven,and/or the stencil design. are there sufficient solder joints, before running the opposite side (are the apertures large enough to achieve a hardy fillet or to small, allowing enough paste to vis
Electronics Forum | Thu Jan 15 15:13:50 EST 1998 | justin medernach
| I have a problem! The solder on my pc boards look great comeing out | of my reflow oven. They go thrue the rest of the prossese | and at the end at the qc station it's cold or whitish or gray not shiny. | does any one have a idea on how to correct
Electronics Forum | Fri Feb 09 13:28:24 EST 2018 | jmedernach
Pin holes in the solder joints on various devices can be an indicator of something amiss with the solder paste itself. Solder paste storage may be a concern. Do you possibly have someone putting paste back in the refrigerator after use? Are you tr
