Electronics Forum | Mon Apr 12 15:52:12 EDT 2004 | wgaffubar
I am using Indium 92J type 4 solder paste due to a BGA site with .008" pads and stencil opening of .009" square and .005" stencil thickness. When I try the type 3 we get insuffecient print. The aspect ratio tells me that I should be using a type 4. T
Electronics Forum | Thu Apr 15 11:53:37 EDT 2004 | Claude_Couture
Hi everyone, Our QC manager is bugging me about calibrating the TC readings on our reflow ovens. I keep telling him that doing a regular reflow profiling with a mole is sufficient to see if the oven temperature are normal. The manuals state that TC c
Electronics Forum | Fri Apr 16 07:34:10 EDT 2004 | Claude_Couture
Ken, thanks for your answer, it is much better presented than what I was fed by our qc. By "calibrating TCs" I meant the readings the controller is displaying on the screen. So that would be the converter that we would check and calibrate. Thank you
Electronics Forum | Wed Apr 21 17:23:19 EDT 2004 | Jack
Thank you for your input. My question was very generic because I neither have an EE background nor am I very familiar with SMT technology. The reason I asked for information regardin minimum efficient production volumes is because the company I wor
Electronics Forum | Wed Apr 28 12:33:05 EDT 2004 | Dave G
Rob, Don't know if you bought an "H" tower with your UP or not. You did you can have a dedicated support plate made from Aluminum that has pockets machined out to match components on the bottom of the board. (Most of the workholder guys can set you
Electronics Forum | Fri Apr 30 22:45:59 EDT 2004 | Bryan She
we can test the defects with multimeter after reflow ,before ICT.and if we replace this damaged parts with good ones.everthing is ok.I'm sure this part is damaged during reflow,but why not other 19 same parts of the 20 on each board?we attach a therm
Electronics Forum | Fri Apr 30 10:56:27 EDT 2004 | Bryan She
We tested J6 open on .5mm pitch CSP(In fact,only resistance much lower than normal).J6 is one of the corner ball of the CSP.Defect rate is about 3%. Stencil:4 mil thickness,10 mil square aperture, solder mask openning:10 mil diameter circle. Board fi
Electronics Forum | Tue May 04 16:43:41 EDT 2004 | russ
So the only difference between the "regular solderers" and the BGA people is trace repair? If that is it than you should put the pay in range with your PCB repair people. We do not pay any extra for BGA rework since all they do is wick pads (common
Electronics Forum | Thu May 13 19:41:17 EDT 2004 | johnww
Hi Everyone, I want to use LEDs in an enclosed box for edge lighting etched glass. There are 15 LEDs in a box and they are set up in 5 series of 3 LEDs. The LEDs are 3.5V 20Ma 8000mcd. I've worked out that I need an 82 ohm resistor for each series
Electronics Forum | Wed May 26 00:41:31 EDT 2004 | fastek
I don't think you can go wrong with either choice. Couple of other things to consider: 1) Are both machines similar in price? 2) CP-6 feeders will work on a CP-7 although the larger pans need to be changed. Used CP-6 feeders go for about $175 on av
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