日本語
Hey All,
Lately I've been fighting popcorning of some 5050 LEDs. I see about a 20% fail rate per panel of 72 LEDs. I ordered them from China and they don't come in moisture protective packaging, unlike my MSL parts shipped from US suppliers, and I dont know how long the LED's were in the warehouse conditions. At least popcorning is the only thing I can think of, with that kind of fail rate.
Profile / solder:
Hold @ 225C (Max 230C) for 50 seconds in a Controleo 3 BD toaster oven. Chipquick SAC305 solder paste.
WS2812B 5050 LED on a reel, specifically. (they have an IC built into the chip)
Data sheet doesn't cover MSL.
I was thinking about getting one of those Ziplock tupperware boxes and a large desiccant device for storage, but I'm not sure how to bake them, and I think they NEED to be baked. I believe 40c is the max temp because of the reel, but any recs on how long? I found a lot of info for IC's but not much for large LEDs. The supplier is no help (I don't speak Mandarin).
Thanks for any info!
- Comments(1)
A****min
Oct 10.2019, 14:44:08
What do people here use for MSL part baking when they do their own assembly?
Do you have an actual dry cabinet that also does humidity extraction, like you see in assembly houses?
Or do you just whack your stuff into a toaster oven? (or something in between?)
