Electronics Forum | Wed Sep 03 19:54:23 EDT 2008 | vladig
Well, I'm not a sale person whatsoever. I'm a purely technical guy (even PhD :-)) who has been with the industry for quite a few years and I know very well what intermetallics means and how thck it should be for different board finishes and solders
Electronics Forum | Tue Sep 16 16:03:43 EDT 2008 | vladig
Well, typical content of Pb in Sn/Pb polating is a few percent (just to mitigate Sn whiskers growth). Therefore, the lead finished with SAC305 won't be much different from those finished with Sn/Pb. You can make one or two cross-sections for sanity c
Electronics Forum | Fri Sep 26 12:16:52 EDT 2008 | bickt
you cannot swap 0-3 only 0-1 or 2-3 they are not the same euro cards. they function very diffrently. if you look you will see there are more chips and circuitry on one set. there are 2 w/red leds and 2 with green leds. at least thats how they soo
Electronics Forum | Fri Oct 03 16:22:38 EDT 2008 | alien
For plain old QFPs in small quantities, a temperature controlled heat gun + a decent soldering station can do the trick. In my case, Steinel HL 2010 E heat gun (handheld, but with a digital readout) to desolder. Clean up pads with solder wick. Solder
Electronics Forum | Fri Oct 03 16:51:06 EDT 2008 | waveroom
If this is a one time rework might I suggest farming it out? 100pin QFP can be taken off no problemo.. Putting it back down properly and then hand soldering??? I wouldn't want that job. You need excellent placement and imaging and your not going to
Electronics Forum | Wed Oct 08 01:43:24 EDT 2008 | pwilson1
Hi, Thanks for the replies! We currently use a mixture of DEK 265 LT`s and GSX`s. I ll be honest they are all around ten years old and i find them very reliable and easy to set up and maintain, with the only real issues we see now and again is w
Electronics Forum | Fri Oct 03 15:56:04 EDT 2008 | ivanahumpalot
What type of placement machine do you have? How is the machines vision system viewing the part, body x,y only? Do you have the option with the vision system to use just the lead information? Can you use the pin itself for placement from an up look
Electronics Forum | Mon Oct 20 17:03:05 EDT 2008 | davef
Josh From looking at your pix, we don't have a clue. [And we're going down to the nurse's station to get our eye checked because we don't black bubkus.] More than anything else the: * White on the pads could be solder * Copper-penny brown on the pad
Electronics Forum | Mon Nov 03 16:09:42 EST 2008 | Frank
Oddly enough, I find it more often than not that the supply type is not mentioned in the data sheets. And if the original author was saying 0603 in a metric package, then it would be in 8x2 tape. Even in the US, some companies use the metric names
Electronics Forum | Mon Nov 03 11:20:08 EST 2008 | boardhouse
Vlad, That was a bad statement to make... Enig should never be thicker than 5 micro inches max. or it will cause embrittlement. This process does self limit but it can put on as much as 10-14 Micro inches which would be a major cause of concern.
