Electronics Forum | Wed Oct 13 15:09:55 EDT 2021 | dingerusaf
What is the proper storage and shelf life after washing a PCB with an OSP finish? We sometimes have to pull the boards off the line and wash the solder paste off the boards.
Electronics Forum | Tue Nov 23 19:47:49 EST 2021 | proceng1
I am aware that RPS was former ACE employees or whatever the relationship was, and that the basic design is very similar. I have a lot of experience with first generation ACE products before they were acquired by NORDSON.
Electronics Forum | Thu Feb 24 15:36:34 EST 2022 | dontfeedphils
Looks like a decent profile. Only recommendation I have would be to possibly try and high-temp solder the thermocouples rather than the aluminum tape/kapton, only because you can get air-gaps and inaccurate readings using the tape method on assemble
Electronics Forum | Thu Feb 24 20:39:05 EST 2022 | joshsvoboda
there is evidence of wetting on the heel. This is the first time I have had this type of joint using SC100C on a leaded part. Usually there is at least some wetting on the sides instead of just looking like it is pressed in and sitting on top of the
Electronics Forum | Thu Mar 03 14:01:16 EST 2022 | chris007
Hello Baking before solder pasting and reflow actually due to poential moisture development. This is JDEC requirement I believe to do so. We AOI after cleaning so we AOI a clean PCBA
Electronics Forum | Mon Apr 25 14:44:26 EDT 2022 | dwl
You could try putting a dot of adhesive like Loc tight chip bonder or similar between the pads. The adhesive will cure before the solder paste hits the reflow temp and hold the LED in place.
Electronics Forum | Mon May 16 21:16:50 EDT 2022 | SMTA-64387687
Can you brush some flux on the connector pins and run them through a heat cycle, hot enough to activate the flux, but not enough for solder to melt or component damage? That should remove most of the oxidation. Then, you can run it through your regul
Electronics Forum | Tue Jul 19 18:40:41 EDT 2022 | emeto
Nitrogen is helping voids, so if you have specific parts that are prone to voids, you might start seeing more voids. Joints will probably look a little dull in comparison and this might affect your existing AOI programs.
Electronics Forum | Thu Oct 27 20:46:35 EDT 2022 | emeto
Also solder paste type, optimized printer parameters suitable for this paste, correct apertures design on the stencil, stencil thickness, proper AAR, mounting accuracy and placement profile, oven profile, board thickness and a few other.
Electronics Forum | Tue Jan 03 13:34:08 EST 2023 | dontfeedphils
Just to add some more caveats, the rate at which the paste leaves the tube will also be dependent on the (somewhat) fluctuating variables of temp and humidity. This is why a height measurement of the paste roll on the screen works better.
