Electronics Forum | Fri Mar 02 16:47:39 EST 2001 | traviss
If the thinner you are using is 4662 and the correct amounts that should not be the problem. Is this the first solder operation? I would start by looking for rosen or no clean flux getting on the boards at some point before wave soldering and not bei
Electronics Forum | Tue Mar 06 13:59:39 EST 2001 | dason_c
I have experience to the Kester 2331 water soluble flux long time ago with white residue and it related to the solder masking. Check what kind of the solder mask and ask Kester to do the test for you. Rgds.
Electronics Forum | Thu Mar 08 14:17:56 EST 2001 | Fred Jung
My company is planning on utilizing SMT on a new product line. We would like to have several of our production people trained on SMT solder rework and repair. Can anyone suggest an appropriate training class in the New York metropolitan area?
Electronics Forum | Thu Mar 22 16:06:22 EST 2001 | dblsixes
Our next plan of attack is to dog-bone the solder aperature. By reducing the width of the solder paste at the heel, we hope to slow the flow up the leg of the pin while the temperature of the pad catches up. We have boards that were HASL ...
Electronics Forum | Fri Apr 06 04:10:25 EDT 2001 | kensmoke
We recently had a multi block panal change at the vendor Now the production lines are producing solderability defects in great number. The makeup of the pcb is a type of fiber glass mask green in color and pads with no tinning just copper lands.
Electronics Forum | Tue Apr 10 10:41:23 EDT 2001 | GregH
What's wrong if my solder joint is grainy ? what will be the effect on its strength ? what process problem is causing that ? regards
Electronics Forum | Wed Apr 11 19:32:39 EDT 2001 | Adam
I'm trying to find information/articles describing the effects of temp and humidity on solder paste. Just recently we have gone through a change outside temperature and humdidty and have notice solderabilty problems with smt boards.
Electronics Forum | Thu Apr 12 22:35:42 EDT 2001 | davef
Consider the profile recommended by your solder paste manufacturer to be the starting point to begin tailoring ramp rate, dwell times, and temperature excursions to meet the requirements of your boad design, the capabilities of your components, and t
Electronics Forum | Mon Apr 16 14:33:50 EDT 2001 | dason_c
Consider to use micro via 10 mil or less, it may help to prevent any solder/flux reflow to the other side and affect your next printing operation. Also, solder void need to be under consideration. Dason.
Electronics Forum | Tue Apr 17 21:19:31 EDT 2001 | davef
Curious. Tell us more about: * Murata solderability protection * Solderability protection on the caps used to replace the Muratas * Reflow profile used with each of the two pastes * Differences in the two pastes
