Electronics Forum | Fri Apr 30 12:34:12 EDT 2004 | Bryan She
Hello all, these days I've met an OSP board testability issue. 1.OSP board 2.Solder paste:Kester R244 no clean paste 3.Print solder paste on test pad. Issue: There's brone(light yellow)flux residue on test pad,and the probe can't penetrate the residu
Electronics Forum | Fri Dec 07 02:10:26 EST 2007 | mpolak
Hi, Could you guys verify my BTU VIP98N oven settings for lead free process. At the moment as my standard profile im using these settings 140 160 180 207 205 220 257 same temps for bottom and speed 50cm/min. Has anyone got same oven and could
Electronics Forum | Mon Mar 31 11:10:43 EST 2003 | davef
First, most �thermal shock� recipes are not a reliability test. There is no relationship between the failures seem in these tests and in-use application. These tests show you the failures in these tests. That�s it!!! Second, accelerated life test
Electronics Forum | Mon Mar 31 01:11:14 EST 2003 | yukim
Hi, we are about to change solder paste for cost issue. Currently using a no clean Sn63 solder paste and tried several others, all no clean, Sn63 and Sn62. Want to ask about reliability test: we did thermal shock test for 8 days. The flux residue cha
Electronics Forum | Fri Apr 16 12:47:48 EDT 2010 | boardhouse
White solder mask does have a tendency to yellow within the lead free environment. so double coating will not help any. I due believe the flux is a factor in the yellowing but due to the color is the main reason. Find out what brand of S/M mask they
Electronics Forum | Tue Apr 05 12:31:05 EDT 2022 | proceng1
A while back, we had a yellow coating showing up on some solder joints at Selective Solder (LEAD alloy). I contacted the company for our machine and he looked into it. One change we had made not too long before is we switched from Superior 75 to Sup
Electronics Forum | Wed Feb 14 15:37:48 EST 2018 | cbart
Do you mean in a reflow oven or wave solder? if so check your exhaust blower, make sure its still drawing. if not the flux/dust that builds up on the exhaust pipes may be falling into the machine.
Electronics Forum | Tue Jan 16 18:13:25 EST 2007 | greg york
Try to process the composite pallet through the wave without any flux and view volume of smoke and if any residue is deposited in the wave when it exits. My guess is that the pallets are releasing some binders that are high boiling and this in turn c
Electronics Forum | Fri Feb 10 01:20:17 EST 2017 | bukas
is it yellow dust? if yes, 1. you will probably need to clean whole pot. it sticks to walls of the pot and circulates trough alloy. 2. get your alloy checked, how much of unwanted metals/contaminants it has 3. try alloy refresh bars, there was a po
Electronics Forum | Fri Jan 04 06:28:27 EST 2019 | ameenullakhan
Hi, We are observing solder joint discoloration ( yellow color appearance ) in one of assembly after secondary reflow run. Please provide your valuable feedback. Solder paste : water soluble lead free Alloy : SAC305 Flux : ORM1. Please provide v
