Electronics Forum | Thu Mar 18 11:07:45 EDT 2010 | mun4o
hi, lately I have problem with smd leds.After reflow 2-4% of leds are broken.I think , that reason is bad storage of components, because in our stock the tape with leds have not Moisture Barrier Bags.My question is ,how you storage components, which
Electronics Forum | Fri Mar 19 03:13:35 EDT 2010 | mun4o
Hi, First check what the Moisture Sensitivity > Level of the LEDS is....you may need to ask the > LED manufacturer. Once you've established it is > moisture sensitive then follow latest version of > IPC JEDEC 33 spec. for storage of them and dryi
Electronics Forum | Thu Oct 13 15:38:18 EDT 2022 | proceng1
Do you have the ability to add copper thieving or otherwise balance the design? We had a customer making LED boards with a terible inbalance. Some of the boards would "smile" so badly in the oven that the leading edge touched the top. They switche
Electronics Forum | Mon Mar 22 10:24:14 EDT 2010 | mun4o
Hi , I think that our problem is humidity, because when I use leds from new tape ( pack in MBB ) no any defects.After that, we put opened tape in our store.After 2-3 weeks I use the same tape with leds, and we have 2-3% defective leds.I make this tes
Electronics Forum | Thu Mar 18 18:07:21 EDT 2010 | grahamcooper22
Hi, First check what the Moisture Sensitivity Level of the LEDS is....you may need to ask the LED manufacturer. Once you've established it is moisture sensitive then follow latest version of IPC JEDEC 33 spec. for storage of them and drying them if t
Electronics Forum | Thu Mar 18 14:33:46 EDT 2010 | jdumont
Is your peak reflow temp exceeding the LED spec? We store our SMT LED reels on the rack with the rest of the discreets and have never seen this issue...
Electronics Forum | Fri Mar 19 07:18:14 EDT 2010 | grahamcooper22
Hi, do you know if your LEDs are moisture sensitive ? And if so what MSL level ? Surprisingly it seems that not all are, but some seem really sensitive. I imagine the differences are down to the plastics used and the LED manufacturing processes. I a
Electronics Forum | Fri Mar 19 03:50:37 EDT 2010 | grahamcooper22
Some things you have to be sure of... Can you guarantee the LEDS are DRY when you receive them ? They may be packed in dry bags but when was this done and has the LED distributor had them open at his site ? Using vacuum sealed dry packs is a good way
Electronics Forum | Tue Apr 05 12:03:39 EDT 2022 | my3sons
Hello, we can offer you a great solution for handling these LED's which I'm betting are sticking to the nozzle after placement correct? We use a special tip material that doesn't stick...our part # 2014-2146 $450.00
Electronics Forum | Mon Aug 05 22:10:38 EDT 2013 | jaimebc
We have HRFT-301U ( staple bend) is fairly easy to set up. All you need is t-handle Allen that I believe is provided with the machine. All adjustments to form a part, both pitch and lead length are mechanically adjusted by sliding the forming and c
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