Electronics Forum | Sat Dec 30 19:02:19 EST 2006 | mika
This type of component packages works best with vision type: 254 - irregular. Measure the total package length including the leads. Also set the body dimension x-y tolerances to at least 0.35mm and the the pick up x-y tolerences to 0.5mm in the part
Electronics Forum | Thu Jan 04 08:33:08 EST 2007 | davef
You cannot determine foil thickness from its weight per area, because of the significant variation in the density of electrodeposited [ED] copper. But people don't care. They do it regardless. (oz/ft2)||(mils)||(mm) 1/2||0.7||17.8 1||1.4||35.6 2||2
Electronics Forum | Thu Jan 04 15:27:23 EST 2007 | patrickbruneel
Here it is Steve Here's a (427 page) EPA report on Solders in Electronics: A Life-Cycle Assessment http://www.epa.gov/opptintr/dfe/pubs/solder/lca/lfs-lca-final.pdf If you look at page ES-16/table ES-4 and ES-5 it appears that SAC alloys have a hig
Electronics Forum | Thu Mar 15 10:11:27 EDT 2007 | cecil
Just finished using my first Invar stencil. Gotta say I was very reluctant at first but my stencil vendor convinced me to give it a shot. I have to admit that I am pretty impressed. I would have normally used an electroformed stencil for the prototy
Electronics Forum | Mon Mar 12 08:24:30 EDT 2007 | rgduval
ICT is generally a manufacturing verification test. Coverages vary depending on the board. I've run lots with as low as 25% coverage on the board (but produced 98% FPY post board assembly). Functional test is exactly what it sounds like. Checking
Electronics Forum | Fri Apr 06 12:25:55 EDT 2007 | mika
Thanks DaveF, Ohh I still whish there was a way to share some pictures... * Pads on pcb are very very strange: It varies from a non uniform pattern but after we measure these I would say ~0.22 - 0.24mm dia. Haha, We have never discovered such a stra
Electronics Forum | Tue Mar 27 16:22:10 EDT 2007 | donjohnson
60G are common, as are vibration events of >1.5Grms. And drop heights are just outrageous, old billy throwing your new server off the truck doesn't care too much about the glass house theory, but loves to throw anything that he can lift... say he cra
Electronics Forum | Wed Mar 28 21:29:59 EDT 2007 | darby
Component. Press edit on the desired feeder #, let's say 1. The left and right arrow keys will toggle the feeder type eg 8mm, 12mm etc. Press enter The cursor will now shift to the Set No field. Enter the Set No using the numerals on the keypad. To
Electronics Forum | Fri Apr 20 07:54:25 EDT 2007 | Bob R.
I'm in the high reliability (exempt) sector and have thermal cycled hundreds of boards in the past few years. As far as which is more reliable, SnPb or SAC305, my data is similar to what the technical literature is saying, "It Depends". In low stra
Electronics Forum | Tue Apr 17 08:47:13 EDT 2007 | Brett
Oh no! Doom and gloom on the horizon! Why should I even try? Gawd, I've heard this sh@t all my life and ya know what? I went to school, got good grades, worked my ass off, landed a decent job, and still work for a low IQ, non-Chinese, non-Indian