Electronics Forum | Thu Sep 15 17:44:15 EDT 2022 | decaire
I agree with Evtimov that sticking with the J-Std-033 is preferable to creating your own procedure at a different temp, especially if you need to pass an audit since the auditors will compare your process to the J-Std. My understanding is that oxida
Electronics Forum | Tue Jun 10 11:07:33 EDT 2003 | fmonette
Another important element to consider is the impact of ambient temperature and humidity on Moisture Sensitive Components. The majority of plastic encapsulated ICs are classified as moisture-sensitive devices (MSD). This means that they are qualifie
Electronics Forum | Wed Mar 24 16:54:38 EDT 2010 | stepheniii
J-STD-033B.1 Says "For cavity packages in which water may be entrpped, water clean processes after first reflow can be an additional source of moisture. This may present an additional risk, which should be evaluated." And it talks about derating if
Electronics Forum | Tue Feb 15 18:09:45 EST 2005 | GS
Hello everybody, according to your experience, what is the allowed or suggested (by Suplliers,or Standards,or best pratics) shelf life for components (SMD/PTH) from fabbrication date to the soldering date ? Let's consider best case when compon
Electronics Forum | Fri Jan 21 18:47:14 EST 2000 | Ashok Dhawan
This massage is for clarifications on storage and handling of Moisture sensitive parts: Does chip resistors,capacitors and inductors need vacuum packing during usage life? For repacking of FPDs to limit reuse, is it necessary to use vacuum seler or s
Electronics Forum | Sat Nov 26 21:44:43 EST 2005 | mika
My enlgish & gramma is not that good, but perhaps You will understand me? We all know that the way we handle the MSD (Moisture Sensitive Devices) are crucial. We have been through this in a lot of other postings; but I feel there could be some remai
Electronics Forum | Mon Jan 22 20:14:52 EST 2001 | davef
Take note that contrary to popular belief, it is not acceptable to assume that the floor life clock will be temporarily stopped when components are put back in dry storage following exposure to ambient conditions exceeding one hour. ... why doesn�t
Electronics Forum | Sat Jan 20 20:54:03 EST 2001 | fmonette
Dear Mike, As you might have noticed from the labels on the dry bags, the maximum floor life is specified by the component manufacturer and it can range from 1 year (level 2) down to a few hours after mandatory bake (level 6). This limit is based o
Electronics Forum | Tue Jan 23 09:03:00 EST 2001 | fmonette
This guideline is actually in the IPC/JEDEC standard J-STD-033, May 1999 (although it is not spelled out very clearly, thus the current confusion in the industry). The technical reason is that moisture diffusion is a very slow process. Once parts ha
Electronics Forum | Tue Jan 13 15:48:58 EST 2015 | natashakt
170 degrees Celsius) and regular FR4 materials. I am trying to see if we can use table 5 on page 14, "Recommended Equivalent Total Floor Life (Days)" to find out how long (at specific humidity and temperature) our populated and unpopulated PCB's can
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