Electronics Forum: dull solder (Page 1 of 16)

blackened/black solder

Electronics Forum | Wed Mar 28 14:06:46 EDT 2007 | realchunks

Hi A, Your subject is black solder, but you decrribe the solder as dull? Dull solder joints could be dross related, or even flux related. Are there any other related defects? But "dull metal sufaces" makes me thing this board was subjected to so

blackened/black solder

Electronics Forum | Wed Mar 28 14:38:24 EDT 2007 | amelara98

solder joints are dull on the bottom, and surprisingly, darkened, "black" on the top, especially at one location only.

blackened/black solder

Electronics Forum | Wed Mar 28 13:14:38 EDT 2007 | amelara98

I am having problems with a product we receive from our overseas plant, where there is excessive "dullness" of solder joints/metal surfaces after running a board on a pallet through wave solder. Seems to be an issue of the pallet, as the solder appe

Rejuvenated solder paste

Electronics Forum | Sat Dec 18 15:23:05 EST 2004 | grayman

We used to add flux on a "expired" solder paste but we discontinued as there are many problems and customers complaints coming from our American customer. Like unwetted solder pads,dull and cold solder and many others. The profit is really ok but qua

Re: white dirty solder

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

cold solder after drop test

Electronics Forum | Wed Jan 07 07:16:25 EST 2004 | davef

Cold solder prior to properly performing a well designed drop test. Actually, "cold solder" means different things to different people. Two dull solder connection conditions are: * "Disturbed" solder joint: a solder joint that has an "angular face

surface mount connector, disturbed solder

Electronics Forum | Fri Apr 18 15:38:22 EDT 2008 | ck_the_flip

Do you have a picture? SMTNet HAS the technology now to post pictures. "Disturbed" to the typical Q.E. usually means grainy or dull, or a wrinkly solder appearance. All of this has to do with the "grain structure" of the solder joint. Here's a p

Re: solder joint problem?

Electronics Forum | Wed Jun 14 08:08:56 EDT 2000 | Wolfgang Busko

Hi ji tae, we had a similar problem with QFPs 0,5 pitch processed by one subcontractor. The symptoms we noticed were: - the solderjointshape and wetting looked normal - the surface had a dull gray appearance - by pushing a lead sideways with a tweez

Post reflow solder joint inspection

Electronics Forum | Tue Feb 03 06:52:45 EST 2004 | paul_bmc

About 2 years ago our company tried to go with a post reflow AOI inspection. This AOI was suppose to be able to inspect to a level class 3 product. **It is impossible** You cannot inspect for a heel fillet and inspecting for poor wetting is a very

Re: Ceramic + Hi-temp solder

Electronics Forum | Wed Apr 21 22:15:12 EDT 1999 | Chris

| 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 abo

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