Electronics Forum | Tue Mar 20 05:29:30 EDT 2018 | rob
Fuji makes great machines, just depends on the local support If you are not doing anything special I'd probably just go with the I-pulses as you'll get a lot more machine for your money, and have some left over for inline AOI/SPI or look at somethin
Electronics Forum | Tue Sep 24 11:10:07 EDT 2002 | Gregg Temkin
I�d appreciate assistance in trying to resolve a placement/soldering problem. My company has designed a board which uses a large number of 0402 LED�s that are .028� high. The LED�s need to be soldered so that they point straight up and are not til
Electronics Forum | Tue May 28 18:31:08 EDT 2019 | jlawson
Solder paste flux is main contributor, Lead termination chemical-oxide by products and PCB Plating-Chemicals. Reflow profile would have very limited if not no impact really unless is way off. Paste volume control and Stencil design plays a big part
Electronics Forum | Mon Apr 25 17:15:45 EDT 2022 | SMTA-64387687
It's difficult to diagnose without the LED specs. Is the spacing between the pads the same? Your pads seem too large for the Nichia part. Try reducing the stencil apertures to deposit less paste and closer to the inside edge. Depending on your oven,
Electronics Forum | Wed Dec 04 04:28:58 EST 2019 | oxygensmd
It seems there isn't right connection between solder and solder-legs. Maybe check that the LEDs get huminidity, have some oxidation on the legs, try different solder paste, check the reflow solder profile. On the photo I can not saw properly reflowe
Electronics Forum | Thu Aug 05 09:43:35 EDT 2010 | dldavis
Try antitombstone paste or if you are using nitrogen back off on the amount of nitrogen used.
Electronics Forum | Thu Dec 19 02:16:19 EST 2019 | sssamw
if use more aggressive paste,be careful risk of electro-chemical migration
Electronics Forum | Fri Aug 24 12:24:35 EDT 2018 | davef
Could be ... Consider this: The LED and the BIG pad reflowed before the small pad. The superior force of the solder on the BIG pad pulled the LED over and the LED took the solder on the little pad along with it. Try this: Print paste on a board. No
Electronics Forum | Wed Jul 12 08:49:38 EDT 2017 | williamaxler
I have a few LED pcb's that have an aluminum > substrate that are ridiculous to rework. They > heat-sink like crazy and I can't reflow the bad > LED's, no matter how much heat I apply. Any > suggestions on techniques or equipment to use? > I ha
Electronics Forum | Tue Jun 13 15:03:54 EDT 2017 | mmjm_1099
For many moons, I have used IPA for our cleaning tanks within out DEK systems. Now we have a new engineering team and he would like to try a stencil cleaning solution (DEK PRO XF). Can everyone tell me there pros and cons of using each of these over
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