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Screen Printing Adhesive on Mixed Technology Boards

Electronics Forum | Tue Nov 20 20:56:23 EST 2001 | davef

You�re correct. The release characteristics of epoxy differ from solder paste. Consider: * Using print/flood stroke, on-contact print cycle. * Printing slow enough to fill the hole with adhesive. * Overcoming the thixotropic [The viscosity of thixo

changing from no-clean to clean

Electronics Forum | Tue May 21 17:16:51 EDT 2002 | davef

Larry, Yes, no matter how much you�d like to avoid using NC, you probably will have to start using the stuff, if the design [sales, in your case] types have their way. We can clean WS under 1mm and 1.25mm pitch BGA. For 0.8mm pitch BGA, we use NC.

CSM Technical Question

Electronics Forum | Thu Oct 11 09:01:04 EDT 2007 | actech

Jon, Thank you for your input, I think you may be correct in that the Brd./Comp. of Fid data may not be correct any more. The unit was caught up in a flash flood just high enough in our facility to get the processor board. After cleaning and drying a

CSM Technical Question

Electronics Forum | Wed Oct 17 09:19:23 EDT 2007 | actech

This box has the I/O card mounted sideways under it's own cover on the side of the main box. The CPU card is the bottom card. The Two driver cards X/Y and R/Z are side by side and mount to a steel base pannel with there relays at the back. but even i

QFN aligment issues

Electronics Forum | Mon Jul 09 18:11:20 EDT 2012 | rsikora

Your selection of pads to use as Fids will be critical. In your pictures of the QFN component, the pcb pads are primarily non-solder mask defined, but on 3 sides of the QFN the corner pads become solder mask defined due to the copper ground flood.

Re: Quad 100 History

Electronics Forum | Tue May 11 15:50:25 EDT 1999 | Russell Bartley

| | | | What is a Quad 100 with vision and glue dispenser worth these days? | | | | | | | JJ: It's similar, but not the same ... A friend bought a Quad 100, vision, couple of 8mm feeders, and 13 vib bases w/platforms for $5k last month. I told him

Re: Selective Wave Soldering

Electronics Forum | Tue Jan 12 17:51:41 EST 1999 | Tom Gervascio

I've been using selective soldering process for about 18 months. The major problem concerns tight spacing- the distance between the SMT pads to be masked and the thru hole leads to be wave soldered should be no less than 0.150 inches. Keep the wall

Re: PCB panellisation

Electronics Forum | Fri Apr 03 13:53:41 EST 1998 | Ron Beasley

| | | We are in the process of deciding whether to change a PCB product from a single board to a 3 up panel array. Could you please advise on the most effective removal design, either scoring or snap off, taking into account that material utilisati

Re: PCB panellisation

Electronics Forum | Sun Apr 05 14:57:10 EDT 1998 | Earl Moon

| | | | | We are in the process of deciding whether to change a PCB product from a single board to a 3 up panel array. Could you please advise on the most effective removal design, either scoring or snap off, taking into account that material utili

Had to share that one, its related to mfg. in the 21st century

Electronics Forum | Thu Jan 12 11:45:18 EST 2006 | patrickbruneel

Noah 2005 In the year 2005, the Lord came unto Noah, who was now living in the United States, and said, �Once again, the earth has become wicked and over-populated, and I see the end of all flesh before me. Build another Ark and save 2 of every liv


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