Electronics Forum: led silicone (Page 1 of 2)

how to remove bubbles on silicone coating?

Electronics Forum | Mon Jul 11 11:40:11 EDT 2011 | blnorman

According to the datasheet, this is a LED encapsulant, is that how you are using it? It also had a section on compatibility, which indicates that it is an addition-cure silicone prone to cure inhibition.

Masking with hight temp non silicone tape before wave

Electronics Forum | Wed Feb 18 12:21:42 EST 2009 | glynnhamer

HI again Dave, I was wondering what kind of problems you were experiencing with the silicone tape that led you believe that it wasn't the correct tape and question the manufacturer? Were there more failures and solder issues ? Thanks

LED sticking into carrier tape

Electronics Forum | Tue Aug 01 09:27:13 EDT 2017 | tmennink

Hi all, We are having a lot of trouble with mis-pick trying to place silicone dome LEDs(3535 package) It seems that the silicone of the LEDs is sticking to the side wall of the carrier tape pocket. The vacuum nozzle would normally suck up the led an

LED Stick To Cover Tape

Electronics Forum | Fri Jun 11 19:33:19 EDT 2010 | bocci572

Are these silicon based LED's? If so we are experiencing the same issue at our facility.

LED Pick up Issues during Feeder Feeding

Electronics Forum | Thu Mar 14 07:22:22 EDT 2013 | fredcalkins

This problem has become a real issue with the tacky silicon used in many LEDs. Cree has recomended that the pull off angle be changed for the cover film as mentioned by the previous commentor. With these new silicon LEDs they are recomending teflon o

Panasonic CM Nozzle shifts LED's positions

Electronics Forum | Mon Apr 18 19:58:22 EDT 2022 | cbeneat

I had the same question. We have custom nozzles made by Count on Tools. I believe we found urethane works the best for the silicon domed LEDs. Have you slowed the feed rate down on the feeder? Also adjust the top tape to the back slot on the feeder.

SMT LINE CHOICE

Electronics Forum | Wed Mar 21 14:12:38 EDT 2018 | rob

Yep, especially if they are the silicon domed type that mark easy. We gang pick LEDs on our Yamaha kit, getting 12 at a time per side, but we have the luxury and volume of having multiple reels of the same components.

Panasonic CM Users

Electronics Forum | Sat Feb 11 09:58:20 EST 2012 | cbeneat

I have a question for any Panasonic CM 402/602 users. We run Cree XPE/XPG/XPC LED's on our machines, and have struggled for years with the lights sticking in our nozzles. We have two types, I believe both designed by Cree, one picks the light up by

LED sticking into carrier tape

Electronics Forum | Wed Aug 02 10:13:24 EDT 2017 | proceng1

Are the parts kept in a humidity controlled environment ? Perhaps a little humidity is making the silicon "sticky".

Easy and inexepnsive SMT machine?

Electronics Forum | Wed Mar 23 19:57:18 EDT 2011 | dlou87

Im sure this has been gone over before, but what the heck! We are mounting LEDs on metal core PCBs. Almost all of them have domes of silicone on top. We have some large boards (largest is 2ft x 3") Not concerned with parts/hour or fancy features.

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