Electronics Forum | Wed Mar 24 15:08:08 EST 2004 | John
I'm working on a new product soldering to a thick film material. We currently use only No Clean solder pastes. The vendor that supplies the substrate has suggested going to an RMA paste to improve solderability. We haven't used any, but I'm not fa
Electronics Forum | Wed Aug 19 15:24:21 EDT 2009 | smt_guy
I have a customer who approved and asked us to process PCB's built with Lead-Free HASL Finish using Eutectic Solder. We did as directed and inspected the result from a 10-PCB Run and couldn't find any problem with solderability or issues. What Issue
Electronics Forum | Sat Jan 19 11:53:51 EST 2019 | davef
cColor is NOT a measure of solder connection quality. It is a process indicator. So, you're being smart by trying to figure out whats causing he discoloration
Electronics Forum | Thu Jul 31 23:52:12 EDT 2008 | roc2x
Hi, Im having problem on tombstone, The part is LF chip component 1005, and my solder paste is WS leded. tombstone is not in a deg angle but one side is soldered but the other side is just sitting on the solder. Looks like my solder can not wick up t
Electronics Forum | Thu Jul 31 23:57:11 EDT 2008 | roc2x
Hi, Im having problem on tombstone, The part is LF chip component 1005, and my solder paste is WS leded. tombstone is not in a deg angle but one side is soldered but the other side is just sitting on the solder. Looks like my solder can not wick up t
Electronics Forum | Thu Aug 24 13:31:55 EDT 2000 | Dave F
At room temperature, how long does it take for the phases of a common tin (Sn) / lead (Pb) solder, say 60/40, to reach equilibrium? While the materials are diffusing toward equilibrium do the material properties of the solder change significantly?
Electronics Forum | Mon Apr 23 15:10:29 EDT 2007 | ccross
We have eliminated the adhesive process as much as possible. We do paste in hole where possible and selective solder the remaining components or hand solder them. We looked at this a number of ways and determined the selective soldering and hand sold
Electronics Forum | Thu Jan 16 17:54:12 EST 2003 | Ren�
Hi burb , reflow temps are same than other profiles just follow your solder paste recomendations , Will help you a lot a solder paste with Silver , or if you want to eliminate completely the granular looking , use nitrogen with your oven ( You will s
Electronics Forum | Mon Dec 13 06:21:14 EST 2004 | Peppe
I work in electronic industry and I'm interested about the standard values of FIT (failure in time or useful lifetime) of soldering. In essenze my question is : how much time can work a good solder joint, before became fail ? Exist a minimum and ma
Electronics Forum | Thu Aug 19 16:03:04 EDT 2010 | kpm135
Are you reusing your paste or putting down new every time? I've seen solder balls before when operators try to use the paste past the recomended stencil life. I've also seen it happen with a bad batch of solder paste from a vendor.
