Electronics Forum | Mon Jan 07 17:51:34 EST 2008 | jmelson
The clear plastic packaging for LEDs is a LOT softer thermoplastic than the thermoset epoxies used on ordinary chips. I think people have had high failure rates when reflowing LEDs in all-plastic packages even at SnPb temperatures, and much worse at
Electronics Forum | Wed Jan 09 09:31:53 EST 2008 | flipit
I solder LEDs everyday from 0402 sizes on up. I work for an optical company so every product I make has LEDs. Some products have hundreds of LEDs per circuit. The problem is that clear materials are not filled materials and thus don't have the adv
Electronics Forum | Fri Jan 11 16:33:59 EST 2008 | mgershenson
We have 30 years of soldernig experience, 25 years in soldering robotics, and have had laser based systems for a few years now. I'm not sure you need a laser for this application. It's really going to depend on whether or not an iron tip can get in
Electronics Forum | Fri Jan 18 07:46:34 EST 2008 | adlsmt
The reason we are using laser rather reflow is because the Osram Golden Dragon part my customer needs to use is not rated for reflow. I would prefer to stay away from hot bar as there is maintanance required on the tips, Unitek had a pretty sweet mac
Electronics Forum | Wed Jan 09 09:37:41 EST 2008 | flipit
I would suggest accepting components only in paper tape. I have had better luck with 0402s in punched paper over plastic embossed tape. You can also pick with oversized nozzles if your vision system does not give you trouble with seeing the nozzle.
Electronics Forum | Thu Jan 10 18:32:20 EST 2008 | stevek
Our layout guy recently started making land patterns with the corner lands oversized. These are for leadless and various flatpack parts. He claims this is to improve manufacturing. I had seen a few boards with this just as I got out of the CM worl
Electronics Forum | Wed Jan 23 14:09:10 EST 2008 | lmartenson
We have carriers that we use in wave flow solderers that are machined specifically for each board out of ESD composite. I was wondering if anyone knows about lead contamination of this material and the cleaning of composite? I know that it is a p
Electronics Forum | Sat Jan 26 00:39:21 EST 2008 | fastek
When I left the industry about 15 years ago in the Bay Area, good SMT technicians were making $85K per year at OEM's. The process and manufacturing engineers where I worked were all making $125K and more. Real estate was 1/3 the cost it is today. Gla
Electronics Forum | Tue Jan 29 16:35:36 EST 2008 | fastek
I was waiting for that. Actually it was when the US consumers decided that they wanted their cell phones and computers for free is when the business pretty much died. We were in the business of making Network Adapter Cards for PC's and selling them
Electronics Forum | Thu Jan 31 08:51:31 EST 2008 | tonyamenson
I just made a more in depth query on the floor and what I thought was one issue is many many issues. We are hadn placing parts that came in bulk instead of tubes, another issue is the vision system won't register teh part corrrectly, another is the
.gif)
