Electronics Forum | Mon Jan 25 18:15:39 EST 1999 | Joe
Greetings, We are discussing what should and what should not be baked and vacuum packed. Should we just concentrate on the fine pitch packages and the bga's? What about those components which come on blister tape, should they get baked and re-packed
Electronics Forum | Mon Jan 25 21:14:08 EST 1999 | Dave F
| Greetings, | | We are discussing what should and what should not be baked and vacuum packed. Should we just concentrate on the fine pitch packages and the bga's? | What about those components which come on blister tape, should they get baked and r
Electronics Forum | Tue Feb 02 11:07:36 EST 1999 | justin.medernach@flextronics.com
| Greetings, | | We are discussing what should and what should not be baked and vacuum packed. Should we just concentrate on the fine pitch packages and the bga's? | What about those components which come on blister tape, should they get baked and r
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 | Thu Jul 03 08:40:23 EDT 2003 | Kris
Hi, undercured solder resists may be a defect people have seen so far. Some of the probles arising is blistering as well as reaction with wave solder flux that may lead to some kind bad gel like formations. Gels the idea would be to reflow the ba
Electronics Forum | Thu Aug 21 16:00:31 EDT 2014 | davef
This links to a NPL presentation on moisture removal from PCB http://www.npl.co.uk/upload/pdf/20140318_effect_baking.pdf Consider: * Focusing on preventing moisture contamination of boards, rather than removing moisture * There will be no standard
Electronics Forum | Sun Sep 07 20:51:52 EDT 2014 | natashakt
1. Is the high RH environment consistently at 72% RH and 21.4 degrees Celsius? No, over the past 2 weeks I have recorded the highest at the moment: 67% RH at 22.6 degrees C and lowest (it is Spring not summer yet): 31.9% RH at 19.0 degrees C. Or d
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 Aug 18 15:04:25 EDT 2014 | rgduval
Off hand, I can't recall a "formula" for how long boards could sit in a specific RH environment. I've done a couple of quick Google searches, and can find a bunch of information on the dispersion rate of moisture in various PCB materials, but, nothi
