Electronics Forum | Wed Oct 18 16:33:26 EDT 2000 | Dave F
Mike: An omega meter has very little to do with ion chromatography. * IPC TM-650, 2.3.25B, Detection and Measurement of Ionizable Surface Contaminants is a process control method that washes boards with an isopropanol / water solution and measures
Electronics Forum | Fri Oct 13 05:21:08 EDT 2000 | Robert Steltman
Looking at the original post, it seems that the white residue is formed on the board after wave soldering and becomes evident when it has been left standing for a while. From what I understand, it seems that the solids content of the "no clean" flux
Electronics Forum | Sun Oct 08 14:09:45 EDT 2000 | dtm
Ok here's the story...My company has recently started an in house smt line. (we have been mfg thru-hole for years). We hired a smt op and the most of the rest was from reading and previous experiance from other employees/engineers. Our test departmen
Electronics Forum | Wed Sep 27 17:24:08 EDT 2000 | Wolfgang Busko
Ashok: Plating thickness and ductility of the copper are things to look for. If it�s a crack where two layers are pressed together one possible cause could be bad process parameters while pressing these layers together at the PCB shop with the resul
Electronics Forum | Fri Sep 15 09:24:54 EDT 2000 | C.K.
At my last place of employment, that was the big reason why nobody (especially the Design Engineers) bought into a no-clean process - interference with high-impedance circuits. One guy was so paranoid about flux residues remaining on the board, that
Electronics Forum | Thu Aug 31 12:17:56 EDT 2000 | mike weekes
We are considering alternative Board Finishes to our existing HASL process. The HASL effects opens on 25 and 20 mil packages after reflow and we know if the advantages of CuOSP and other alternatives. OUR Concern: Is there a shelf life and handlin
Electronics Forum | Thu Aug 17 08:44:14 EDT 2000 | Wolfgang Busko
Hi Jaqueline, my first thought goes into the same direction, twist or warp (either the board or the BGA itself). I don�t know the SRT equipment. I�ve noticed with our equipment using a spot underheat element caused some warpage of the PCB making it
Electronics Forum | Tue Aug 08 20:43:41 EDT 2000 | Dave F
Tom: So is warp or is it twist? They�re different problems, possibly with different sources!!! And possibly different solutions!!! Consultants to talk to are: Earl Moon (pod@vcn.com), Werner Engelmeyer (engelmaier@aol.com), Les Hymes (les.hymes@w
Electronics Forum | Tue Aug 01 00:34:45 EDT 2000 | Antonio
I have evaluated SRT, Air-Vac and Conceptronic rework stations. All three machines offer great BGA and Micro BGA rework capability. But the one I have preferred is the Conceptronic Freedom 2000, as a matter of fact I have purchased two freedom 2000 i
Electronics Forum | Tue Jul 25 20:34:48 EDT 2000 | Dave F
Travis: Several points: * When we converted artwork (back in the Jurassic Period), we used a huge digitizer pad and the original artwork. * While your Rube Goldbergian (http://www.rubegoldberg.com/gallery.htm ) arm encoder thing sounds fascinating
