Electronics Forum | Wed Aug 09 11:59:19 EDT 2017 | dleeper
As you already know, it depends on the paste. There isn't really a rule of thumb, but less time exposed it better. The issue is the flux exposure to the air and ambient conditions. The flux can evaporate or absorb moisture from the air. If the paste
Electronics Forum | Wed Aug 20 11:15:40 EDT 2008 | 18424
Hi all, Wanted to get some input from you guys and gals, I have check the archives and found not much. I am putting together an MSD program here at the company i work for, and was wondering how other people are tracking their times in/out for compone
Electronics Forum | Fri Sep 14 03:43:16 EDT 2012 | mili
Hello!I have a delta wave with these problems:offtime of lambda wave tracking is too long and when modify offtime setting to a negative value for a fast stop on tracking position of lambda wave, the wave pass on stand-by with a delay of half of leg
Electronics Forum | Fri Sep 14 04:11:16 EDT 2012 | mili
Hello!I have a delta wave with these problems:offtime of lambda wave tracking is too long and when modify offtime setting to a negative value for a fast stop on tracking position of lambda wave, the wave pass on stand-by with a delay of half of leght
Electronics Forum | Mon Jun 18 18:14:59 EDT 2001 | davef
Would comment extensively on the following? The time is a fact for X-ray inspection. If you set the contrast, tilting angle correctly (provide you did enough cross section to know the few type of failure mode: e.g. smaller balls, shorts, missing on
Electronics Forum | Wed Jan 12 10:05:20 EST 2005 | Dreamsniper
we are using polyimide boards 6 inches x 7 inches, 2.5mm thick, 12 to 14 layers, for aerospace industries. I am using a long bake of 12 hours at 70'C prior to manufacturing or exposure to elevated reflow and wave soldering temperature. If schedule i
Electronics Forum | Fri Apr 23 08:45:33 EDT 1999 | Steve LeCour
At Sanders (Military manufacturer), we have only started using plastic parts within the past few years. After being tasked with reviewing the new J-Std-033, it became obvious to me our process for controlling device exposure is weak. We build very lo
Electronics Forum | Mon Jan 12 14:07:53 EST 1998 | Yves Trudell
I've heard of a series of labels that absorb moisture at different rates and/or change appearance when a specific saturation level is reached. If such labels exist and if they could be correlated to the exposure limits of specific moisture sensitivit
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 | Wed Aug 24 10:07:56 EDT 2005 | stepheniii
I think where the fuzzy thinking starts is by calling the recipe's; profiles. Or maybe I"m being too fussy. Idealy you want every solder joint to have the same thermal "profile" (not recipe). That is the temperature over time is best if identical fo
