Electronics Forum | Fri Feb 23 10:42:16 EST 2001 | Greg Jones
Donnie: I was surprised to see your comment "a little more up to date than KIC." Please contact me for information about our new product lines. I can gaurantee you they're more then "up to date." Greg Jones DrJ@kicmail.com
Electronics Forum | Tue Feb 20 15:30:23 EST 2001 | kerryn
We have a high-mix, low-volume type shop and clean over 50 stencils per day. The wash and rinse cycles in our aqueous stencil cleaner is ok, but the drying time takes too long (15 - 16 minutes per stencil). You indicate that hot air can damage a
Electronics Forum | Wed Feb 21 11:25:04 EST 2001 | Dave E
We have had a problem with some resistors on some conformally-coated boards which, after a few months in the field, started going bad -- a real worst-case situation. The resistors would increase in value dramatically and sometimes develop diode-like
Electronics Forum | Wed Feb 21 21:21:05 EST 2001 | Dave E
Realistically it seems like a component problem that the vendor is trying to blame on our processes. The problem is internal to the 0805 resistors so I suppose they are perhaps porous to some degree. I have only heard 3rd hand about the analysis that
Electronics Forum | Thu Feb 22 07:03:12 EST 2001 | davef
I guess the answer to that would have something to do with the distribution of the problems across the various components on the board. [I hear you saying that it's isolated to a specific component, from a specific supplier; rather than being more l
Electronics Forum | Mon Feb 26 09:36:08 EST 2001 | blnorman
ASTM E 443 is a test for sulfur by Oxygen Flask Combustion. Other instruments will detect sulfur (I assume a SEM with EDS capability will pick up the sulfur). We had an addition cure silicone potting compound inhibition problem last year that was t
Electronics Forum | Wed Feb 21 14:18:37 EST 2001 | jagman
Could anyone please give me some insight on the time/temperature requirements for curing SMT adhesive used for a high temperature (96/4 solder) application in a bake oven, rather than using reflow? I understand that it would probably vary from epoxy
Electronics Forum | Wed Feb 21 16:03:14 EST 2001 | blnorman
You're right, manufacturers time/temps will vary. A single manufacturer will have a host of materials with different cure schedules. We currently use 2 epoxies that cure in 2 - 3 minutes at 150�C. One will also cure in 5 minutes at 125�C. Talk t
Electronics Forum | Wed Feb 21 17:27:02 EST 2001 | jollyrodger
HELP...... I have recently taken on the post of line technician at my place of work. I require as much information as you can give me on all SMT processes. We work with Fuji CP643E, Philips FCM, Dek 265, Universal GSM, BTU Paragon ovens. All infor
Electronics Forum | Thu Feb 22 21:01:12 EST 2001 | davef
We don't do this, but if we had to and lacking better advice, for all components I�d dry pack according to J-STD-033, store in a low temperature and humidity controlled environment [maybe using some semicon fab inert storage cabinets], review the eff
