Electronics Forum | Thu Dec 14 15:05:17 EST 2017 | emeto
I am pretty sure, you are looking into the wrong spot. Your paste is too much, or your part has very inconsistent narrow leads(that includes wrong pad design as well.)
Electronics Forum | Sun Jan 07 08:46:08 EST 2018 | spoiltforchoice
Your paste should specify a number of times it is OK for various things to happen. The two you might care about are the "Stencil Time"/"Working life", which is how long the paste can be out of the pot on your stencil while you print PCBs. The othe
Electronics Forum | Fri Feb 13 03:01:57 EST 2015 | eniac
Yes, Kester it's a very good brand in solder materials. I use Kester solder paste and cored wire 10 years - and I naven't any problems. About screen printers - check information about SJ Inno Tech equipment. This is South Korea brand, I have a 4 pri
Electronics Forum | Tue Dec 23 09:13:12 EST 2014 | jeff701
I'm in a manufacturing environment with a very high mix of boards, and some low-mid volume. A "large" production run might consist of 100 boards. Volume: There are numerous boards that have a volume of 1-3 pieces. There are a few boards with an annua
Electronics Forum | Tue Jul 19 09:14:49 EDT 2011 | kahrpr
All I can tell you about what people do with solder paste at the end of the day or for the weekend is. What the manufacturer recommends. What people say in public? What companies actually do as far as reusing it? I am not passing judgment on 1 or 3
Electronics Forum | Fri Feb 23 10:10:32 EST 2024 | emanuel
Well, the story is a little more complicated. The product is also an LED lamp made on an aluminum PCB with the LEDs on one side and the drivers on the other. The board itself is not big, about 90x90mm and most of the components are soldering well. Us
Electronics Forum | Fri Feb 23 09:55:02 EST 2024 | carl_p
Got you. 225C for peak does seem low to me. Henkle is the main one i've used with a peak of 245c & Alpha around the same although I try to keep that at no higher than 235C as we use it for LED arrays. If the peak is that low, is the liquidus te
Electronics Forum | Tue Aug 23 13:35:23 EDT 2005 | SuMoTe
I should read this closer before I post it. It should read "Lead" paste not "Led" paste. This is grease for the screw shaft that brings the rails in/out on the reflow oven.
Electronics Forum | Thu Dec 07 19:20:28 EST 2006 | ganoi
Most likely there is movement during reflow. How about conduction oven over convection oven for reflow? This is a small PCB with the LED sitting on a Flex-Rigid extension from the PCB. I was thinking if the stencil aperature for the LED was to be cu
Electronics Forum | Tue Aug 14 10:53:15 EDT 2007 | rgduval
Should be do-able. Check out a couple of things: 1. Temperature tolerance of the LED's. If they can't withstand reflow, then you won't be able to do it. 2. Height of the LED's versus the travel of your pick/place. If your pick/place head won't t
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