Electronics Forum | Fri Feb 18 11:24:52 EST 2011 | pkannan
The following is my opinion on the Shelf life of the Solder paste. Comments are welcome to support or against it. Solder Paste users often have the issue of Shelf life expiry condition. Companies including big MNCs, order certain quantities, but du
Electronics Forum | Wed Aug 04 12:35:15 EDT 1999 | Dave F
| | | | I have been asked to supply a maximum shelf life for our assemblied PCB's. I realise this is dependent on so many factors- temperature, humidity, no of layers etc. But does anyone have a formulae for calculating shelf life, or does anyone kno
Electronics Forum | Sun Jun 23 12:24:37 EDT 2002 | stepheno
I worked at a place where a customer complained that the resistance of some components was lowered. It was found to be flux entrapped from the wave solder process. The tube of epoxy, didn't have a date of manufacture, shelf life, or use by date on
Electronics Forum | Mon Feb 05 07:02:11 EST 2007 | CL
ASIR, Findings for us so far: OSP- has worked well for us for single sided boards only. We have seen problems with using it on double sided reflow applications. Also, some customers have specified OSP, but are intolerant of exposed copper. Limited
Electronics Forum | Wed Feb 23 00:45:49 EST 2011 | tsvetan
Does someone with technical knowledge knows what exactly happend with the solder paste after the shelf life pass? What we have seen is sometimes flux separation which disapear after a good mix, and change of viscosity i.e. drying. The tin, silver and
Electronics Forum | Wed Sep 26 10:05:41 EDT 2012 | testbloke
Although we do not have any soldering issues with our OSP PCB's, I am trying to establish clear rules with regards pcb storage and shelf life. Our PCB's are supplied in metalised moisture barrier bags but without desicant, our current rules as follow
Electronics Forum | Thu Nov 10 20:39:44 EST 2022 | SMTA-64386598
The solderability shelf life of ENIG is related almost entirely to diffusion of O2 through the gold plating. When O2 diffuses through the gold, the underlying nickel is oxidized rendering it unsolderable (with ENIG - you solder to Ni, the gold dissol
Electronics Forum | Sat Feb 19 10:27:38 EST 2011 | kahrpr
Just a thought. What is the real shelf life of the past? Do manufactures low ball the self life to sell more paste. If the past is perfectly good one day before the expiration date is it still bad one day after I doubt it. Right or wrong I have seen
Electronics Forum | Thu Mar 22 03:26:42 EST 2001 | moseschee
Hi Dave, Thank you for your reply.It means a lot to me. By the way, is it possible to have the analysed data on the study you mentioned regarding the solderability "conditioning " ? Can we establish the correlation of solder shelf life based on y
Electronics Forum | Thu May 10 10:27:29 EDT 2001 | davef
It depends ... * Components stored in a garage in Chiriqui,Panama will have a different shelf life than those store in a climate controlled room in Ayrshire, Scotland. * Components from a reputable supplier will likely have a different shelf life tha
