Electronics Forum | Fri Oct 27 13:49:11 EDT 2000 | dpoling
We are currently having problems with tombstoning and minor lifting on small SMT stasck film capacitors. Does anyone have any ideas?
Electronics Forum | Thu Mar 29 11:11:49 EST 2001 | pzohbon
Rob, How does your chemistry stack up against the 440R? I see you mentioned ease of maintenance as one down fall in that chemistry's make-up. Could you elaborate for me. Thanks.
Electronics Forum | Tue Dec 07 14:13:59 EST 1999 | vahid vatannia
Is it true that "square" fiducials cause less error than round fiducials? Also, how does Panasonic machines stack up against Fuji, Siemens, or Philips placement machines? Thank you.
Electronics Forum | Fri Jan 23 07:20:12 EST 1998 | Chris Chorley
What is the lifetime for a typical solder paste ? How long can boards be stacked waiting before the paste goes off ?
Electronics Forum | Sat Apr 06 09:37:13 EST 2002 | davef
Thanks. That is exactly what freaked me out. We run Impells and so are not excited about pushing the 'waste' out the 'stack'. I imagine we'd just cut the line and divert the stuff to a collection reservoir.
Electronics Forum | Fri Apr 12 16:13:36 EDT 2002 | pjc
Dave, USI makes spray fluxers with stepper motor and servo motor controlled traverse heads that only spray on the board. Virtually no waste going up the stack. www.ultraspray.com
Electronics Forum | Tue Aug 13 16:47:22 EDT 2002 | mick
The residues are from the flux, not adhesive. Do you have flux management system in oven? You also need to check the flux type = can you use low solids. The effect is the same as steam in bathroom - it is cooling affects in exhaust and flux reforming
Electronics Forum | Fri Jul 16 03:40:17 EDT 2004 | Rama
We are going to start producing product that require us to assemble Stacked BGAs. My question - how to rework this package, as the the process of either removing or re-placing them onto the PCB will the effect the BGA sitting on top of it. Pls help.
Electronics Forum | Thu Aug 05 17:21:48 EDT 2004 | russ
A stackup is basically this, if all parts (mating) are at the high end or low end of tolerances will they still fit together or meet any dimensional requirements as an assembly.
Electronics Forum | Fri Feb 18 13:15:10 EST 2005 | need help
we are having problem with the flipchip sticking to the tape and reel cover, jumping around the tape pockets, and double stacking at placement during production. Does anybody else have this problem? Does anybody have a solution.
