Electronics Forum | Tue Feb 20 16:33:08 EST 2001 | davef
Time, time, time. There just never seems to be enough!!! Eh? You�re correct. Depending on the material, some trays can take a high temperature bake, while other trays, in addition to tubes, and reels, require a low temperature bake. With this la
Electronics Forum | Wed Sep 05 16:35:22 EDT 2012 | davef
It depends, but I'd guess that as a minimum the floor clock will start when the component returns to room temperature. It's easy to argue that the floor clock starts earlier than that!!! Probably, the floor clock starts a couple degrees lower than th
Electronics Forum | Tue Nov 06 12:43:31 EST 2012 | deanm
4.2.7.1 states, ...If the bake temperature is not greater than 90 °C, there is no practical limit on bake time... If I interpret that correctly, then you may keep MSDs in a 40 deg. C oven indefinitely with no adverse conditions. Instead of opting
Electronics Forum | Sat Dec 13 17:46:27 EST 2008 | ysutariya
If you're military then you're probably just needing standard 130Tg FR4 and tin-lead finish. I would check two things: 1. Bake temperature: Isola recommends 300F for 4 hours to drive moisture out. Lower baking temperatures do not require a linea
Electronics Forum | Thu Mar 16 22:19:38 EDT 2017 | deanm
First, reflow does not reset the clock for MSL exposure. The best solution is to run the second side before the exposure time expires. I am curious to know why they must sit for 40 hours. If that cannot be done, then store the assemblies in a dry c
Electronics Forum | Mon Mar 22 07:59:42 EST 2004 | davef
Search the SMTnet Archives for suppliers of high temperature bake tubes, trays, and reels.
Electronics Forum | Thu Dec 20 19:41:27 EST 2001 | ianchan
I called a cuppa of indutrial friends, and they concluded that the flex-PCB in question, was being subject too high a oven-baking temperature of 100deg-C...50~60deg-C oven-baking temperature would be more appropriate for flex-PCB, due to its very pad
Electronics Forum | Thu Aug 09 19:13:37 EDT 2007 | htran
DaveF, Our customer requirement is to comply with IPC-STD-001 but the J std doesn't specify the bake out temperature for populated boards and the moisture absortion rate. Right now we are baking the populated PWAs after aqueous wash at 80C at 18-48
Electronics Forum | Mon Feb 04 12:30:25 EST 2002 | fmonette
Dave highlighted all the elements that must be considered to determine the optimal temperature and duration for a pre-rework PCBA bake process. As far as the component is concerned, it really depends if you care about not damaging the package for r
Electronics Forum | Thu Feb 05 17:54:04 EST 2004 | davef
Even with the best of intentions, some lots of components just last too long. Recognize that controlled environment storage is only a delaying tactic. So when the piper come to play and baking becomes inevitable, we "repackage" components in tubes
winsouce.jpg)