Electronics Forum | Sat Jun 23 11:35:58 EDT 2007 | grantp
Hi, Yes, we just built a new plant, and used copper again. The stuff we cut out of the old building was copper, and it was fine without any issues. We lay it on an angle so condensation flows to an end, and can be periodically vented, and we take a
Electronics Forum | Tue Jun 26 14:28:50 EDT 2007 | bjrap3
I have been trying to rework a lead-free BGA. For some reason, when I remove the BGA the corner pads on the board come off and the board must be scrapped. If I do manage to remove the BGA successfully, when I solder the BGA, the corners of the BGA
Electronics Forum | Wed Jun 27 11:59:55 EDT 2007 | samir
*Preheat zone *Maximum slope is a time/temperature relationship that measures how fast the temperature on the printed circuit board changes. The ramp�up rate is usually somewhere between 1.0 �C and 3.0 �C per second, often falling between 2.0 �C and
Electronics Forum | Fri Jun 29 09:40:46 EDT 2007 | dphilbrick
We have 2 ovens and 2 wave solder machines using nitrogen. When we were running 2 shifts a day 6 days a week we were spending about $3500 per month. Currently running 1 line 5 days a week we are at about $650 per month. These costs include taxes, tan
Electronics Forum | Mon Jul 23 17:49:04 EDT 2007 | davef
We know nothing of DeFelsko, but do understand how they distinguish between the solder mask and the conformal coat. DeFelsko manufactures hand-held, non-destructive coating thickness gages that are ideal for measuring the dry film thickness of confo
Electronics Forum | Wed Jul 25 11:55:21 EDT 2007 | ck_the_flip
Zoinks!! Doing the homeplate design on 0402 will actually make your tombstones WORSE! Think about it. Your wetting forces are now on the ENDS of the device with no solder paste toward the middle of the device to tack the part down - a gauranteed f
Electronics Forum | Fri Aug 03 11:09:33 EDT 2007 | realchunks
Well, Ray Rassmussen believes that "IT" may put China on it's ear. Not sure about any of you, but I never felt the need to splash water on my face whilst reading this white paper. Hate to see how he'd react to seeing a board going over a 500 degree
Electronics Forum | Fri Aug 03 11:58:35 EDT 2007 | patrickbruneel
This is the last comment I will make on this subject. To me this occam process makes a whole lot more sense than lead-free. My whole life I made a living in soldering so I would hate to see it go, but we can�t ignore innovative new technology. Lead-
Electronics Forum | Fri Jul 27 10:07:18 EDT 2007 | rgduval
Our preference has been ENIG. We find that we achieve higher quality (visually) soldering for through hole and surface mount parts, with less handling issues than when we use white-tin, or immersion tin. We are about to do a test on some boards tha
Electronics Forum | Mon Jul 30 16:34:45 EDT 2007 | John S.
We're seeing shorting from the lead of an electrolytic cap to the can. It appears to be solder wicking up the lead, through the boot, and then shorting to the can. Has anyone else experienced this? It is a very cheap cap from China of course, but
