Electronics Forum | Mon Aug 09 16:22:17 EDT 2004 | AJ
Thank you all for replying and helping me out. Obviously there is much more information to be found on this technology. Before I leave for school I will post all the info (links to articles and other bits of info) I have gathered on SSD, for you guys
Electronics Forum | Wed Aug 04 00:22:17 EDT 2004 | Shean Dalton
and one more thought about your original question, if the flux does look really strange and out of place, then inspect the reflow oven. A great amount of flux condensation in the reflow oven's cooling zone can cause crystalized flux to become airbor
Electronics Forum | Wed Aug 04 16:46:40 EDT 2004 | davef
We assume this is different discussion that the discussion about "crystallized flux under BGA". Correct? Milky residue with water washing makes us think "noclean flux res that just got washed". We know what you said, but we can't help ourselves.
Electronics Forum | Mon Aug 09 17:02:32 EDT 2004 | arminski
Hi Shean, Thanks for the analysis. "Your product looks like it may have non-solder-mask-defined pads." Yes. It is a NSMD PCB. "Does there appear to be any residues on the bare boards, and/or, BGA components prior to applying the solder paste?"
Electronics Forum | Wed Aug 04 10:20:13 EDT 2004 | santech
I am looking for an inexpensive way to mark pcb's. Anyone out there got any ideas? I need to print out 2-5 characters on an array of 40-60 boards. currently using silk screens and an old screen printer, but I can see that in no time I will have ov
Electronics Forum | Tue Aug 10 14:12:53 EDT 2004 | Fillmore
The alternatives are ink-jet and laser and you'll spend way over $20,000 for that solution! Screen printing is still the best at ROI when doing multiple panels and lot's of legends. We used a rubber stamp inked with Hysol for smaller quantities and o
Electronics Forum | Wed Aug 11 09:35:15 EDT 2004 | loz
Last time I experienced this, one of the operators had increased the wave height. Reverted it back to the original setting and no more balls. Under cured solder resist again? Mr Greg? Not doubting your summation but PWB vendors are too blame again?
Electronics Forum | Thu Aug 12 08:03:54 EDT 2004 | Rafal M.
We used fluxes: Cobar 94-QMB (no bismuth), RF800, Cobar94RXZ-M, with foam and spray fluxers: MBO clean alloy SN63PB37.experienced with changing preheatting, speed of covoyer single and double wave., we tried every combination. I think the problem is
Electronics Forum | Wed Aug 04 17:16:13 EDT 2004 | Richard
Can anyone comment on inspection criteria for PIH applications. I'm of the opinion that the inspection criteria used for wave soldered joints should be used for PIH. Some colleagues believe that a bottom side fillet is not necessary since the solde
Electronics Forum | Thu Aug 05 16:15:18 EDT 2004 | pjc
Are you considering baking due to moisture exposure? Not all OSPs are created equal. I would check with your PWB fabricator about dry times and effects on their OSP finish. After you get it, I'd still try just one PWB for bake-dry out and check solde
