Electronics Forum: preheat (Page 92 of 117)

Re: How are your solder balls @ wave solder ?

Electronics Forum | Mon Oct 11 06:00:27 EDT 1999 | Brian

| Folk's, | | I'm just tying up some loose end's on my Master's Thesis on solderballing @ wave soldering and the effect the topography of the mask / PCB has on it. | I was wanting to do a straw poll on you guy's as to the type of resist's you are us

Re: How are your solder balls @ wave solder ?

Electronics Forum | Mon Oct 11 12:24:07 EDT 1999 | John Thorup

| | Folk's, | | | | I'm just tying up some loose end's on my Master's Thesis on solderballing @ wave soldering and the effect the topography of the mask / PCB has on it. | | I was wanting to do a straw poll on you guy's as to the type of resist's yo

Re: How are your solder balls @ wave solder ?

Electronics Forum | Mon Oct 11 13:05:51 EDT 1999 | Dave F

| | Folk's, | | | | I'm just tying up some loose end's on my Master's Thesis on solderballing @ wave soldering and the effect the topography of the mask / PCB has on it. | | I was wanting to do a straw poll on you guy's as to the type of resist's yo

Re: water soluable or no clean flux?

Electronics Forum | Mon Sep 20 09:02:34 EDT 1999 | Wolfgang Busko

| Hi all, | | We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we need your advice. | | We are producing VGA cards and mother boards for PC's all components to be wave soldered are TH, the S

Re: water soluable or no clean flux?

Electronics Forum | Tue Sep 21 02:51:06 EDT 1999 | Mohammed saad

Thank you all for your help. about your question Wolfgang, I am using no-clean solder paste from Kester. Mohammed | | Hi all, | | | | We have a little discussion here about the suitable flux for a certain process, as all of us are beginners we ne

Re: Thermal Stress in Reflow

Electronics Forum | Tue Aug 31 20:41:45 EDT 1999 | Dreamsniper

| | I am looking for a rule of thumb regarding the maximum ramp standard components (chip capacitors) can tolerate without failure during the reflow process. The standard seems to be 3C\second, but this figure is generally derived from the average r

Wave solder edge covers

Electronics Forum | Wed Jun 30 10:37:11 EDT 1999 | Boca

We are wave soldering some fabs with a lot of unmasked trace area along the edges. The trace area is solid copper covered with tin / lead, no masking, no components along the edges, same on solder side and component side (goofy board design). Inste

Re: Wave solder edge covers

Electronics Forum | Wed Jun 30 11:38:05 EDT 1999 | Brian Conner

| We are wave soldering some fabs with a lot of unmasked trace area along the edges. The trace area is solid copper covered with tin / lead, no masking, no components along the edges, same on solder side and component side (goofy board design). Ins

Re: Pin Hole/Blow Hole - Causes and cure please

Electronics Forum | Thu Jun 24 11:41:10 EDT 1999 | John Thorup

| Recently, there has been an upsurge in the Pin Hole/Blow Hole problem in our wave soldering process. We are baking the PCBs for 2 Hrs. at 125 degree C. The Wave Soldering profile seems to be O.K. Still the problem is persistent. Can somebody hel

Re: Warpage at Wave Soldering Stage

Electronics Forum | Tue Jul 20 14:17:34 EDT 1999 | Curtis

| We are a medium sized PCB assy. house manufacturing about 2000 motherboards a day. There is a major problem we are facing at the wave soldering stage, i.e. warpage of the PCB. As soon as the PCB touches the wave it warps severely from the centre


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