Electronics Forum | Mon Jan 10 12:00:06 EST 2000 | Dave F
First, I agree with Wolfgang, in response to Wister. Second, Wolfgang: Sometimes, our blanket purchase order for paste schedules delivery of the paste in advance of production requirements. (What!!!???? In-bound material schedules don't match out-
Electronics Forum | Mon Jul 22 11:51:28 EDT 2002 | philclegg
Has anyone had experience using Copper Passivate coated PWB's, our supplier calls them "flux coated" but as it's an Organic finish is it handled the same as Entek and where can I get details about it?. I have used Entek CU56 & Entek Plus coated PWB's
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
Electronics Forum | Mon May 13 11:17:57 EDT 2002 | genny
I think for our company, the reason we have not yet tried it is two fold. One - we are just barely starting to see a need on a new product under design for a flat finish, so currently we don't use any of the really flat finishes available. Two - Silv
Electronics Forum | Tue Sep 23 10:22:40 EDT 2008 | kumaravelu
Is there any specific method or product available to implement FIFO system. Currently we stack all the D/C in a shelf and we don't have a method to pull the latest D/D first. I would appreciate any help in this regard. Sundaram
Electronics Forum | Mon Jun 21 16:11:41 EDT 1999 | John Thorup
| | I am finding that some of our IC's are coming from the supplier with the humidity gauge in the bag reading 10-20%. Has anybody done any tests to determine what humidty level in a package will cause problems during reflow? | Usually a proper m
Electronics Forum | Tue Feb 07 05:40:16 EST 2006 | pavel_murtishev
Good day, J-STD-033A: 4.1.2.2 Moisture Sensitivity Levels 5-5a For moisture sensitivity Levels 5 and 5a with floor life exposure not greater than 8 hours, a minimum desiccating period of 10X the exposure time is required to dry the SMD packages en
Electronics Forum | Fri Aug 01 08:10:29 EDT 2008 | scotceltic
Has anyone come across a standard or study (JEDEC, IPC) where it has the recommended shelf life outside of a dry box for immersion silver coated PCB's to prevent oxidation from affecting the soldering process (Both reflow and Wave). I know it will
Electronics Forum | Sat Oct 24 13:03:20 EDT 2015 | mikekeens
With regards to PCB surface finish I would recommend Electroless Nickel Immersion Gold (ENIG) because of the long shelf life, tarnish resistance, RoHS-compliance, and easy soldering compared to other surface finishes. http://www.surfacemountprocess.
Electronics Forum | Mon Jun 30 08:55:31 EDT 2008 | davef
It will be tough to find a dimensional thickness specification for HASL. IPC-6012 Table 3-2, line "Fused tin-lead or solder coat - Coverage and Solderable" states the requirement that there has to be complete coverage of solder on the land, and it mu
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