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 | Wed Feb 07 21:58:38 EST 2001 | davef
We are reviewing our shelf life policy and have the following items listed as shelf life sensitive: Printed circuit boards, peelable solder mask, solder paste, moisture sensitive parts, multiwire printed circuit boards from Icon or Hitachi, NiCd batt
Electronics Forum | Fri Jun 14 14:32:05 EDT 2002 | davef
There is no real reason why you shouldn�t use your current paste. Paste for printing usually is a coarser mesh than paste for dispensing. Dispensing paste is more expensive, because of the mesh and the packaging, but that doesn�t matter now. Compa
Electronics Forum | Mon Jun 17 21:18:24 EDT 2002 | davef
I don't understand "well we can't paste the flip chip on its substrate because we are using flux". There is flux in paste. What's the difference? If you use solder paste, there will be more room for underfill, as compared to flux only. Some peopl
Electronics Forum | Fri Aug 16 17:08:07 EDT 2002 | davef
Could be. It does indicate imperfection. * �The component was manufactured and shipped correctly and should not need baking in order to use it.� => Sounds good. Most classes of MSD packaging have a self-life. Lots of times it�s expired before it
Electronics Forum | Sun Apr 05 00:23:53 EDT 2020 | researchmfg
1. To protect the nickel and copper under gold plating from oxidization before soldering. Gold plating can extend the PCB self-life and improve the solderability for 2nd re-flow. 2. Provide a good bonding strength. For Chip on Board process that Gol
Electronics Forum | Mon Aug 28 17:04:52 EDT 2006 | Board House
ImSn - Immersion Tin - Not Recomended- short shelf life ImAg - Immersion Silver - Prefered Surface finsh by most Board houses, Best reworkablility, 12 moth self life, ENIG - Electroless Nickel Immersion Gold - Second Choice for Board Shops, 12 -
Electronics Forum | Sat Jun 02 16:20:06 EDT 2012 | davef
While the only way this thread could look more like a stealth advert is if it has the word 'advertisement' blinking at us, I'll play along. Questions are: * Have you asked the supplier Fantron Technologies [sales@fantron.com] what they suggest? * Wh
Electronics Forum | Wed Mar 12 15:10:07 EDT 2008 | shrek
KRIKIES Lad Hussman. cynicism and skepticism will only get you so far in life me chap. a quality guy like me self appreciates that there are tools out there for measuring the quality of your processes.
Electronics Forum | Thu May 09 17:28:33 EDT 2002 | davef
There is no IPC specification, nor should there be. * There are just too many peculiarities in the design and fabrication of PWB. * The issue is not defining how to store boards. The issue setting expectation for reliable products and allowing you th
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