Electronics Forum | Thu May 06 18:31:29 EDT 2004 | Dreamsniper
"Polymide Films absorb a great deal of moisture. Polymide laminates must be baked at more than 1 hour at 100'C or better for a double sided PWB prior to exposing the laminate to elevated temperatures such as that required for soldering. Moisture abso
Electronics Forum | Wed May 12 08:16:33 EDT 2004 | solderpro
woow, slow down hot rod, hey davef, you are alright by me, good to see some one out there that has hands on experience rather than a theory nut.... any how, you need a top of the line profiler, super gold mole, or Kic.... these truly are the best and
Electronics Forum | Mon May 24 05:53:24 EDT 2004 | johnwnz
Here's an interesting fact, some pastes just don't wet as well as others!.. there I've said it and now people will complain but that's life. Some pastes are formulated to run in air, some in N2, soem are specifically designed to be more aggressive fo
Electronics Forum | Fri Jun 11 13:20:32 EDT 2004 | raylawre
We have segregation of materials, Different storage areas for paste and Bar stock, etc. We are bar coding the solder paste materials (have to scan paste container, and blades before use, etc. line won't run unless its good). Also changed packaging s
Electronics Forum | Sun Jun 06 09:20:03 EDT 2004 | michaeljm
My department and I have been working with immersion silver on and off for about four years and we have compiled quite a bit of data for the Alpha and MacDermid immersion silver chemistries. We have not encountered any assembly or storage related is
Electronics Forum | Thu Jun 24 09:19:31 EDT 2004 | Cal
The Angle view (or Variable Angle Viewing) gives you another perspective on joint inspection. Glenbrook has two great illistrations on the varible angle viewing literature (.pdf file): Here are a few examples: 1) Looking straight down on the ball..it
Electronics Forum | Tue Jul 13 16:35:25 EDT 2004 | Richard
Sounds like your Si plalladium finish has oxide on it from the firing or sitting around too long. I used to assemble LTCC and have had plenty of dealings with this matter. The best and easiest is to get an active type flux and solder paste. AIM makes
Electronics Forum | Tue Jul 06 16:59:36 EDT 2004 | davef
I'm sorry for not being clear. The "1 thou" refers to the thickness of copper that rides below your ENIG. If your HIC card is blue that's good. If it's some other color that makes you nervous, then you make of it what you will. They're pretty muc
Electronics Forum | Wed Jul 07 13:56:57 EDT 2004 | Pierre RICHARD
As converting our boards to lead-free finish (Immersion White Tin) we decided to change de mask color from green to blue. We thought this would be a good idea to spread the idea so we could easily recognize the type of solder application related to t
Electronics Forum | Mon Jul 19 21:25:28 EDT 2004 | davef
It seems like the flux is burning-up before the metal begins to flow on this slightly odd component. Alpha talks about alternate reflow recipes for WS609, as follows: * A straight ramp up profile is preferred for reflowing low to medium thermal mass
