Electronics Forum | Mon Mar 16 04:52:16 EST 1998 | Grant Petty
We are going to try out a PCB manufacturer that has an Alpha Level for ensuring a flat finish on the PCB's. I am interested to know if anyone has and experiences, either good or bad on how boards treated with this process are to assemble. Is there a
Electronics Forum | Mon Mar 16 04:50:53 EST 1998 | Grant Petty
We are going to try out a PCB manufacturer that has an Alpha Level for ensuring a flat finish on the PCB's. I am interested to know if anyone has and experiences, either good or bad on how boards treated with this process are to assemble. Is there a
Electronics Forum | Thu Feb 19 16:02:49 EST 1998 | Gary Simbulan
I have been involved in SMT for only a few months so I am coming from a position of extreame ignorance. I have been asked to investigate the differences in soldering to components with Paladium coated leads vs the standard Tin_lead. I would appreci
Electronics Forum | Thu Aug 23 15:43:24 EDT 2001 | mparker
Have you considered vacuum package in ESD bags, just like the way the IC's are packaged? What about conformal coating for the units being stored? 10 years is a long time for End of Service life of a product. You may need to get accelerated life testi
Electronics Forum | Tue Dec 11 16:28:17 EST 2001 | genny
Our co. is thinking of moving to smocks, but we aren't there yet. However, I can understand why we might want to. Have you ever seen the static buildup on a wool sweater or a polar fleece vest after rubbing against a chair all day in a cold dry pra
Electronics Forum | Tue Mar 19 07:48:26 EST 2002 | PeteC
Have QFP at o.5mm pitch with leads too oxidized for the flux in the paste to de-oxidize(in stock for boo koo time). I saw three companies on the Internet that can "tin" (solder coat) the leads. Does anybody have any experience with having this done t
Electronics Forum | Tue Apr 02 22:52:38 EST 2002 | davef
Tks BT Can't be many places tougher than automotive, 'cept maybe oil field, down pipe. We use Dexter Hysol flow underfills for both 1 thou and 3 thou gaps, but they wouldn't come close to filling under a BGA. Most BGA are sitting about 16+ thou fr
Electronics Forum | Wed Apr 24 21:28:42 EDT 2002 | davef
We do not conformal coat [CC] over NC flux residues. [Not to say that you cannot do it if you want to do it.] We know that the ability to do this properly depends on the NC flux res and the CC. Some work well and others work like a POS. 'The proo
Electronics Forum | Wed Aug 21 10:26:08 EDT 2002 | stownsend
We are using OSP coated boards and no-clean solder paste. In a few instances, we are seeing increased distortion in an audio circuit. Has anybody seen or heard of surface insulation resistance (SIR) decreasing after reflow on OSP boards? Is it possib
Electronics Forum | Fri Aug 30 04:44:31 EDT 2002 | jason
Hi Dave, Why does it become " a bear" if u leave it unsoldered ?? Does it oxidise or something ?? Question (1): Does Ag imm. PCB need to use Solder paste with AG ?? If yes, why. Question (2): Does Ag imm pcb have poorer surface finishes than HAS
