Electronics Forum | Tue Oct 07 10:23:35 EDT 2014 | reballer
I have been applying solder spheres to BGA packages. During the process, the spheres are run over a stencil for placement. The spheres tend to stick to each other (and clump), even away from the stencil pattern, when it is humid in the work area. I'm
Electronics Forum | Sat Oct 18 11:01:04 EDT 2014 | leadthree
I just like to ask if somebody else experienced a similar problem: We press rigid flex PCBs at 356°F (180°C). The buffer layer construction is: Plate PET PVC PET PCB etc So far there were never any problems. But suddenly the PVC becomes very blac
Electronics Forum | Sun Dec 21 04:27:44 EST 2014 | leadthree
Are you really sure that related to my issue? Anyway, in the meantime I experimented a bit with a PVC supplier and now I have a soft PVC that can handle my 185°C (365°F) for 90 Minutes. It becomes a little bit yellow - the previous got cat-black.
Electronics Forum | Fri Jan 10 00:52:46 EST 2014 | mmdashti
Dear Madam/Sir; 1)Unfortunately after some installations and commissioning SMT and THT machines from Beijing Torch (Termway) company in Iran , the quality and operation of these machines seems so so... bad in quality. Because we have some advertise
Electronics Forum | Sun Jan 12 09:29:20 EST 2014 | spoiltforchoice
Subtle spamvertising there. Lower Cost small machine brands worth looking at are probably: Mechatronic Intelligent Drives (UK only?) TWS Autotronik or their Manncorp branded models in the USA Fritsch Innotech Heeb (a virtually invisible market share
Electronics Forum | Sun Aug 17 19:06:42 EDT 2014 | natashakt
Hi All, I have been looking in to some failures of PCB's in Assembly. After SMT the boards are stored for different periods of time in high humity environment (72% RH and 21.4 degrees Celsius) before being sent to Assembly to be handsoldered/put thr
Electronics Forum | Thu Sep 04 03:26:18 EDT 2014 | eurekadrytech
Hi all: Interesting question you have raised as it concerns the rate of absorption by the board material. I represent http://www.EurekaDrytech.com and could assist in resolving the blistering problems you're facing. First some questions. 1. Is the
Electronics Forum | Mon Sep 08 21:12:29 EDT 2014 | eurekadrytech
Hello, Manufacturing process with high moisture and humidity environments and long term storage will definitely see pop corning effects once high temperature from soldering and/or re-flow process. The moisture that has been adsorbed is likely the ro
Electronics Forum | Mon Nov 10 09:11:51 EST 2014 | rgduval
The centering jaws are made out of copper, I believe...and conductive. I'd suggest that the conductivity of the copper makes it a fairly poor source of ESD damage in a component. I have observed physical damage to components from the centering jaws
Electronics Forum | Mon Jul 07 00:45:39 EDT 2014 | comatose
If you study how the process is done now, it isn't that different from what you describe. Instead of glue, we use solder paste, and instead of spraying it we screen print it. But not that different. For feeding boards we use conveyors instead of rubb
