Electronics Forum | Wed Apr 16 01:40:17 EDT 2003 | praveen
Hi , We are using water wash solder paste to solder the SMT LED's manufactured by Chicago Miniature lamp (CMD93-21 & 22)and Kingbright. Achieving the solder fillet , wetting has no issue but we observe high fallout at the functional testing. If we do
Electronics Forum | Sun Jul 06 14:12:51 EDT 2003 | ramanandkini
I wish to inform you that our boards are reflow soldered with Infineon (OSRAM) make SMT LEDs.
Electronics Forum | Tue Sep 09 07:03:56 EDT 2008 | mun4o
Hi All, we poduce diferent kind of Keyboards, and use a lot of SMT LEDs.When I looking for reflow soldering Conditions i n the Data Sheets, usually I find "IR-reflow" Soldering profile.Our Reflow owen have onli conventional heating.Is that problem?
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 | Tue Jan 11 17:19:15 EST 2005 | vickt
Clark, Which component type are you using? Deform? also, is this a domed led? and if so, are you using a nozzle with an approriate ID to seal on the body? Not every LED may be able to be placed with a 4791. Todd
Electronics Forum | Fri Sep 12 18:19:59 EDT 2008 | davef
Questions are: * Why aren't the defective LED blinking? * Do the defective LED blink when removed from the board and tested according to the functional test that you used prior to assembling the boards? * Do the defective LED blink after the solder i
Electronics Forum | Tue Aug 20 08:51:58 EDT 2013 | proceng1
I don't know about a poster, but we just print the Data Sheet for parts with questionable polarity markings. Just remember, that not all SMT LEDs are marked by Cathode. We have ONE LED that we use that the manufacturer puts a dot on the anode side.
Electronics Forum | Fri Jul 04 12:32:33 EDT 2003 | sam
I need some advice about a problem that happened in a SMT LED: The failure symphoms of this SMT LEDs is that the LED body itself seemed to be functional, but when soldering on the products, it showed good wetting and soldering, LEDs are bright and l
Electronics Forum | Fri Dec 08 16:54:42 EST 2006 | flipit
My experience with SMT LED packages is that certain LED package styles tend to float. This floating is caused because the LED is often only terminated on the bottom side of the LED package. Sometimes the LEDs are terminated like a SMT resistor with
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?
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