Electronics Forum | Fri Mar 19 03:13:35 EDT 2010 | mun4o
Hi, First check what the Moisture Sensitivity > Level of the LEDS is....you may need to ask the > LED manufacturer. Once you've established it is > moisture sensitive then follow latest version of > IPC JEDEC 33 spec. for storage of them and dryi
Electronics Forum | Tue Sep 12 19:36:17 EDT 2006 | davef
We've been soldering leadfree components for maybe 15 years. We'd be surprised not to be able to store components for at least a year, not that we purposely do that. Component fabricator process determine the maximum storage time for components. M
Electronics Forum | Tue Sep 16 20:41:41 EDT 2008 | davef
Q1. Can anyone tell me if there is a procedure for storing raw PCB's? A1. Yes, there are thousands of procedures for storing raw PCB. Why so many? Everyone writes their own procedure. Generally, they say: * Boards require individual separation and p
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 | Mon Jan 10 14:10:10 EST 2005 | mdemos1
p.s. IPC-PE-740 has no information on this.
Electronics Forum | Mon Mar 19 13:44:13 EDT 2012 | vinod
If PCB supplier has stored PCB in complete IPC specified storage condition and let say they kept for 2 Years. Are these PCB still good for use? I understand about shelf life and baking procedure but I am not sure how long PCB are good for use if they
Electronics Forum | Mon Dec 31 05:14:58 EST 2001 | ronih
Hello, Are there any rules for PCB drying (baking) before assembly; Date code criteria, finish process on PCB, storage conditions.. ect. I know some assemblers that are baking all PCB (not ENTEK!) as default before assembly, is it realy nessesary? i
Electronics Forum | Wed Dec 15 18:09:10 EST 2004 | DasonC
Jedec J-STD-033A for components. For the Fab and assy, you can check IPC-PE-740, Para. 1.5.4
Electronics Forum | Fri May 09 09:09:22 EDT 2003 | fmonette
Phil, here is why "dry cabinet storage may not stop the clock" : The moisture diffusion inside a component is actually quite complex. When previously exposed components are returned to dry storage, the moisture gradient that is already absorbed in
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