Electronics Forum | Thu Dec 14 04:42:11 EST 2017 | jineshjpr
Can anybody suggest how can I achieve good solderability in convectional reflow oven If I reduced Convection Air Speed 80%. The whole purpose is to reduce 0402 LED tilting in the convectional reflow and the PCB having QFN with 60 to 120 sec soak, 30
Electronics Forum | Thu Dec 14 05:07:55 EST 2017 | tsvetan
picture of the problem would help people to speculate what you do wrong
Electronics Forum | Thu Dec 14 15:05:17 EST 2017 | emeto
I am pretty sure, you are looking into the wrong spot. Your paste is too much, or your part has very inconsistent narrow leads(that includes wrong pad design as well.)
Electronics Forum | Wed Dec 20 07:16:16 EST 2017 | stephendo
I agree with Evtimov. What he didn't point out is that the surface tension of the solder would vastly overwhelm any force from air flow.
Electronics Forum | Wed Apr 16 08:43:00 EDT 2003 | davef
Given that the LED work properly after being touched-up and that you don't have problems with other components, you may not be wetting the LED termination solderability protection during your normal reflow. Use a profiler to check the temperature on
Electronics Forum | Wed Jan 09 09:31:53 EST 2008 | flipit
I solder LEDs everyday from 0402 sizes on up. I work for an optical company so every product I make has LEDs. Some products have hundreds of LEDs per circuit. The problem is that clear materials are not filled materials and thus don't have the adv
Electronics Forum | Wed Jun 18 19:16:56 EDT 2003 | GEJames
hello all - i am i need of a simple electronic counting device but i know little about electronics. would someone please describe to me the parts I'd need and the assembly process to create a computer that meets the following specs: 2 digital LED t
Electronics Forum | Fri Jun 10 19:42:46 EDT 2005 | ktron
Thank D.B. Cooper, actually this LED has 3 sides termination but no termination at underneath of LED. So this LED tends to float rather than performing solder joint during reflow process.
Electronics Forum | Sun May 20 00:11:45 EDT 2012 | kiss
We are mounting 3528 package LEds with pick & > place machine.The problem is , nozzle picks up > the LED , but it stick to the nozzle & not > placed. Then it gives error in the next cycle. > Can anybody suggest the solution? Please advise on mo
Electronics Forum | Mon Jul 10 08:17:06 EDT 2017 | philc
Just a random thought, but we had an issue with having to replace faulty LED's on a PCB, and the solution turned out to be pre-baking the LED's prior to build. Just put them in an oven at 40C for 24 hours, then build. Result was zero defective LED's.
