Electronics Forum | Wed Aug 01 11:11:38 EDT 2001 | JohnW
hi Folk's, Ok so I'm looking for some thoughts on Conductive Epoxy's. I'm trying to replace a material that i can place between a QFP and the PCB to transfer heat from the component to the PCB. The material has to be able to be injected thro' a hole
Electronics Forum | Mon Jun 06 09:05:02 EDT 2005 | cmiller
How do apply it in your process? It would seem best to screen the electrically conductive epoxy then dispense the thermally conductive epoxy to bond the part to the heat sink pad. Any help or opinions would be appreciated. I dont think the System Uni
Electronics Forum | Mon Jun 06 10:02:39 EDT 2005 | cmiller
How do apply it in your process? It would seem best to screen the electrically conductive epoxy then dispense the thermally conductive epoxy to bond the part to the heat sink pad. Any help or opinions would be appreciated. I dont think the System Uni
Electronics Forum | Wed Dec 06 10:41:06 EST 2000 | Travis Slaughter
Sounds to me like they used conductive epoxy instead of plating the vias. I had to deal with boards like that when I was doing consumer electronics developed in Japan.
Electronics Forum | Wed Aug 01 11:57:55 EDT 2001 | mparker
It's amazing the eclectic applications that Silly Putty works for, what the heck, give it a shot! One question, seriously, what are the QFP dimensions? x, y, z? can you stand for the injected material to flow past the leads?
Electronics Forum | Wed Aug 01 12:34:12 EDT 2001 | JohnW
The material has to be injected from beneath the component, it's a 240 pin QFP, ideally I wouldn't want the material gong past teh leads as I have to have the option to rework the thing if, perish the thought, it fail's and need's fixed.....
Electronics Forum | Wed Aug 01 20:21:34 EDT 2001 | davef
0.4 W/m�C [er sumpin like thet]. But it's real brittle. Sofer rework, ya can just pop that sucker [component to be replaced] right arf.
Electronics Forum | Wed Aug 22 14:24:39 EDT 2001 | markhoch
I used a CamAlot 5000 to apply conductive epoxy on an aluminum substrate about 4 years ago. I used the largest diameter nozzle CamAlot had, and I bumped the dispense and dwell times way up. It was the slowest stage in the process, but it worked out o
Electronics Forum | Tue Nov 09 10:44:29 EST 2004 | stefwitt
If you are doing small circuits, you could use glass slides http://www.hometrainingtools.com/catalog/microscopes-accessories/cat_microscope-slides.html apply conductive epoxy traces, place your components in it and cure at ~ 120 Degree C
Electronics Forum | Mon Jan 27 10:09:33 EST 2020 | charliedci
Looks like a screen printed circuit using a platinum or palladium silver paste. This would account for the grainy appearance. I 've seen this on a white ceramic substrate but not on aluminum. Any components are attached using a silver conductive epox
