Electronics Forum | Wed May 08 14:24:22 EDT 2013 | wahahasteven
we are using acrylic conformal coating on the PCB. Under the same program, same parameters (not changing anything on the machine), and we always found one or two boards have some spots which are not coated (shown as picture). The location of the spot
Electronics Forum | Thu Aug 21 12:31:54 EDT 2003 | adlsmt
I have some finished boards that I have concluded have "black pad" defect. Outside of the black crap on some of the solder joints, if the boards are electrically functional, are they reliable? Any opinions would be appreciated as I dont want to throw
Electronics Forum | Wed Jun 15 23:12:43 EDT 2022 | glasscake
New to X-Ray inspection, looking for documentation on finding, analyzing, determining, ext defects with a 2D 5 axis machine
Electronics Forum | Sun Sep 10 17:22:55 EDT 2023 | davef
Look here: site: smtnet.com/library xray analysis
Electronics Forum | Thu May 09 10:12:08 EDT 2013 | wahahasteven
this is one of my project. I have tried to remove coating only on those areas with alcohol and thinner, then program the machine to coat the removed area again. But the result obviously shows that two different tones of coating on the board. I also
Electronics Forum | Thu Aug 21 20:39:09 EDT 2003 | davef
You have one option: Take the boards to the fabricator that build the board and ask him for $20k.
Electronics Forum | Fri Aug 22 09:49:31 EDT 2003 | davef
Ask your supplier for a corrective active and failure analysis of the boards. In parallel, send the boards to a failure analysis laboratory to determine the material on your gold pads. Take your work to another supplier.
Electronics Forum | Wed Apr 19 04:38:49 EDT 2006 | ge_lim
Hi Refering to the Apr edition of SMT , page 24 to 29, anyone got experience on implementing the AOI or 3D x ray : a) What is the pros and cons? b) What is the trend in the PCBA industry for wave soldering inspection? c) Will this implementation co
Electronics Forum | Wed May 08 20:14:24 EDT 2013 | davef
What happens when you rework those non-coated areas? Please list your rework steps Br, davef
Electronics Forum | Mon Apr 24 15:11:11 EDT 2006 | pjc
For solder joint inspection you cannot beat AXI. That's what is was designed for. AOI machines were designed for component inspections and solder joint checking was an add-on. In transmission AXI you can get a measurement of the whole solder joint. A
