Electronics Forum | Wed Apr 03 10:50:06 EST 2002 | BTaylor
Any time Dave I can tell from your responses you have been around this block as many times as I have.Your right automotive is tough nowadays not only from the quality standpoint, now they want everything for free.
Electronics Forum | Wed Apr 17 22:43:54 EDT 2002 | ianchan
what process is that? can kindly describe? is it that technology where bricks of solder are "ready made" deposit onto PCB pads thus eliminating the need to solder paste print/dispense by machine?
Electronics Forum | Wed Apr 24 11:02:01 EDT 2002 | cnoonan
This may not be the answer you were looking for, but I have worked for serveral leading technology companies and we used vision (type 10)on IP3, and QP3 machine and never had a problem with placement issues.
Electronics Forum | Fri May 24 14:03:19 EDT 2002 | luvtolean
I have used both immersion silver and immersion gold and found that the immersion silver performed better in reliability studies for BGA's using 63/37 paste.
Electronics Forum | Fri May 10 14:55:59 EDT 2002 | xrayhipp
Pete, thanks for the input. These are microvias and dont go through the pcb -- they are laser cut to various depths into the board and are .006" dia. on gold plated pads. Paul.
Electronics Forum | Fri May 10 17:42:55 EDT 2002 | davef
I don't know �solder ballooning� from a shoebox. So, rather than let this degrade solely into a rant about the evils of via in pad, please get me up-to-speed in jargon.
Electronics Forum | Wed May 22 13:51:20 EDT 2002 | Phil
2 suggestions - Get a good scope - at least a 4X, but more like a 6X, 10X is best. You have a choice on used equipment for a substantial savings. A Leica Stereo 4 zoom is it. You can look for BGA scopes that have a 90` angle for looking at the balls
Electronics Forum | Wed May 29 10:11:50 EDT 2002 | wilcoxito
Thanks for your input, Alex. I appreciate it. I'd still like some input on diamond-shaped apertures if anyone has had experience with them.
Electronics Forum | Wed May 29 10:52:56 EDT 2002 | slthomas
Just wondering why you'd use a diamond shaped aperture? Seems like it'll just fill in the corners and be pretty much round anyway, so why not just start out that way and keep the volume you want?
Electronics Forum | Wed May 29 13:16:33 EDT 2002 | jax
The only reason I can see for doing this is: Apply more paste than a one-to-one round can provide. Square, diamond, etc... does not matter. Normally this is done for PTP applications but,... If it gets the job done, who cares.
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