Electronics Forum | Mon May 05 11:35:00 EDT 2003 | Grant
Hi, This is an interesting point. I use Koki paste from Japan, and it's wonderful, however what properties of solder paste would make it "anti tombstone" paste? How does led free effect tomb-stoning? That would be interesting to know. We might go
Electronics Forum | Tue Aug 23 08:43:35 EDT 2005 | SuMoTe
Hello all, I am using a led base past on a very thick board. Profiles are 260c in final zone. Currently I am using Biral "NoMelt" grease. This is not good enough for my process. After 1-2 shifts all of the grease is gone. What are you all using?
Electronics Forum | Tue Feb 24 12:45:30 EST 2004 | esoderberg
Contact Kittner equipment supply Ph#607.757.9711 and talk to Walt or Dick. They have modified a unimod in the past to insert the four legged leds.
Electronics Forum | Sun Jun 13 07:57:15 EDT 2004 | Grant
Hi, We have been offered some lead free BGA parts in place of normal lead solder BGA parts in our process, and because we can get them faster it would be a good option. However does anyone know if we can use them as normal. I assume the balls won't
Electronics Forum | Thu Dec 26 12:41:53 EST 2019 | emeto
We agree with your statements. 1. Having manually printed board will compromise your print and you don't know how much paste you have on each pad. 2. LEDs falling off that easily might be related to contamination, considering that your profile is not
Electronics Forum | Thu Apr 17 10:25:42 EDT 2003 | davef
You'd think 219*C should be warm enough, but we'd go higher just to get the part to stick. What is: * LED terminations material? * Alloy and flux type of your solder paste? Is you solder sticking to the pad and not to the component? Or what?
Electronics Forum | Mon Apr 25 14:44:26 EDT 2022 | dwl
You could try putting a dot of adhesive like Loc tight chip bonder or similar between the pads. The adhesive will cure before the solder paste hits the reflow temp and hold the LED in place.
Electronics Forum | Thu Jan 30 11:21:18 EST 2014 | emeto
Hi, we do that for some of our assemblies(the only difference is that our cut in the PCB is bigger and the LED leads step on the paste right away). we place these manually. I assume that you can send them for tape and reel, and if they can find the r
Electronics Forum | Mon May 27 04:28:30 EDT 2019 | SMTA-Rogers
Dear Steve, Thanks for your feedback in our experience add solder paste volume is better for the voids reduce of LED type components.
Electronics Forum | Wed Nov 12 11:32:36 EST 2003 | lloyd
Depending on quantities etc, you probably have a few options. If it's the automated route you require then any of the radial insertion machines from UIC or TDK will do the job. We've inserted LED's in the past with machines over 10 years old, so if
