Electronics Forum | Tue Apr 10 23:33:50 EDT 2001 | zam_bri
Hi.. What is the typical shelf life for chips capacitor 0603/0402 and what is the consequences of using the capacitor which more than 1 year old esplly on double reflow process. Pls help and thank you in advance. cheers
Electronics Forum | Wed Apr 11 23:47:14 EDT 2001 | zam_bri
Thank you for the feedback guys. The concerns I have is related to components' performance as well as chipped-off & cracks. Does the performance also degrading over the time? thx
Electronics Forum | Thu Apr 12 20:27:10 EDT 2001 | davef
Tantalum caps degrade over time. You should not be seeing "chipped-off & cracks" regardless of the age. This should not be a shelf-life issue, unless you are storing them in an aquarium. Tell us the story. Solderability is a shelf-life issue and
Electronics Forum | Fri Apr 13 17:08:57 EDT 2001 | davef
root around the following site http://www.faradnet.com/ ... you should find some good stuff on capacitors
Electronics Forum | Wed Apr 11 11:02:53 EDT 2001 | dave
Hi I found it's hard to attach thermocouple on profile board at fine pitch component by high temp solder. Does any one know the good way to do it? Thanks in advance. Dave
Electronics Forum | Wed Apr 11 11:40:44 EDT 2001 | gcs
High temp solder is the best, but your profiler manufacturer will have some type of adhesive. I know KIC does.
Electronics Forum | Wed Apr 11 17:15:54 EDT 2001 | davef
More often than not lately, we use Al tape [like Brian W mentioned in a recent thread].
Electronics Forum | Tue Apr 17 09:19:11 EDT 2001 | Terry Burnette
Dave, I use Dexter Hysol epoxy 9340 gray. It's a two part epoxy kit. Thermally conductive and electrically insulative. Cures in about 10 minutes at 100C. Terry
Electronics Forum | Wed Apr 11 19:32:39 EDT 2001 | Adam
I'm trying to find information/articles describing the effects of temp and humidity on solder paste. Just recently we have gone through a change outside temperature and humdidty and have notice solderabilty problems with smt boards.
Electronics Forum | Thu Apr 12 02:30:18 EDT 2001 | zam_bri
Thanx for your valuable feedback,Eric. Do you mind sharing with me the pad size change that you have made. I mean from what size to what size. I'm measuring mine now...cheers
