Electronics Forum | Wed Sep 26 12:16:44 EDT 2012 | bwjm
Hi Guys,recently i am facing an issue. Refer to the attached photo. This PCB is high RF speed, gold immersion single layer. After reflow, my solder seems to have black stains on it. I tried with SAC305 paste water soluble and no-clean, both results a
Electronics Forum | Thu Aug 27 05:06:35 EDT 1998 | John Kirby
Could someone please help me. We clean our PCB's with Safewash at present. As most of our work has to be upto MIL-STD, we cannot clean the PCB when transformers are fitted? Could someone please help???? Thank you J Kirby
Electronics Forum | Wed Jul 02 19:06:21 EDT 2003 | Adrian Espinoza
Last week on my company we began a production for new model. Today we identify a possible non-conformance solder appareance. I have a picture for this defect to show the condition.
Electronics Forum | Wed Jul 02 21:40:44 EDT 2003 | davef
Email me your pix Here how one SMTnetter posted pix: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=6046&#Message24067
Electronics Forum | Mon Aug 08 20:22:43 EDT 2005 | plcc
Hi Ktron, I'm still waiting for my supplier to get back to me on the type of finishing. Usually what type of finishing is recommended for reflow under ROsH condition?
Electronics Forum | Mon Aug 08 20:25:39 EDT 2005 | plcc
Hi Davef, I'm suspecting that too! The recipe we are using is the optimum for good soldering results. I'm checking with our supplier on the type of pcb material. Do you know the recommended material for pcb undergoing reflow, under ROsH condition?
Electronics Forum | Mon Aug 08 21:34:44 EDT 2005 | davef
Jim Can you be more specific? What's going "yellow / beige" on you? * Laminate * Solder mask * Legend
Electronics Forum | Mon Aug 08 22:40:49 EDT 2005 | davef
Jim Can you be more specific? What's going "yellowish" on you? * Laminate * Solder mask * Legend
Electronics Forum | Tue Aug 09 10:02:07 EDT 2005 | davef
Td or Decomposition Temperature (the temperature that the epoxy actualy starts to break down) should be greater than 330*C for lead-free. Search the fine SMTnet Archives for more on Td.
Electronics Forum | Sun Nov 06 20:52:34 EST 2005 | milroyperera
Hi Ken What exactly the best reffered angle for Sn/Pb & Pb-free soldering? Is there a site where I can read the basic engineering concepts about this topic?
