Electronics Forum | Thu Feb 05 19:40:37 EST 2009 | davef
There is no standard for deionzed water when used to clean boards. As you state, J-STD-001 defines a cleanliness requirement and a method for determining cleanliness. How you go about meeting that requirement is your decision, as it should be. Fresh
Electronics Forum | Fri Dec 07 10:34:05 EST 2012 | davef
Your machine is a quality control tool. It's good for measuring trends, like the way that you use the scale in your bathroom. It's not intended to be an absolute measure. Background on cleanliness tests * http://www.empf.org/empfasis/oct03/603clean.
Electronics Forum | Fri Aug 30 22:51:14 EDT 2013 | cvogel
IPC-J-STD-001E in regards to Ionic Cleanliness standards states less than 1.56 µg/cm² of total NaCL. Assuming a typical electronic process which involves smt, wave, and post-hand soldering and uses NO-Clean flux throughout all process, is it typi
Electronics Forum | Mon Jan 22 22:37:27 EST 2001 | davef
50 ppm oxygen was on half joints reflowed in air. 3d Human factors PCB pad cleanliness: Handling of bare board pads creates excessive voiding. Print rejection: Cleaning of OSP pads with acetone or isopropanol increases voiding.
Electronics Forum | Fri Dec 10 08:44:52 EST 1999 | Dave F
Vinesh: You�ll find no papers that "clearly describes the harmful effects" of your style "of white residues," because no one is crazy enough to brag that they are doing what your customer wants you to do. The residue of no-clean fluxes are designe
Electronics Forum | Mon Aug 27 22:55:45 EDT 2001 | dougk
If it's inconsistent, reflow and part cleanliness is most likely OK. Check you stencil printing process. How do you perform post-print inspection? What is the stencil-life of your paste? How often is the stencil underwiped? Do you track paste additio
Electronics Forum | Mon Sep 10 13:54:29 EDT 2001 | zbosskc@netscape.net
We currently use 120 psi top pressure and 110 psi bottom pressure using a Westek Triton DI wash and have had no cleanliness issues with any of our vendors and with surface analysis.
Electronics Forum | Thu Jan 03 21:43:20 EST 2002 | davef
Resistivity [1/ohm] readings are determined by the "cleanliness" that you desire to ensure the proper performance of your product. Check the fine SMTnet Archives for background. Contact USFilter [ http://www.usfilter.com/ ] for help.
Electronics Forum | Mon Jan 28 07:48:18 EST 2002 | cnotebaert
Did you perform a cleanliness test on the boards? did it pass? if yes whats the issue? visual attributes like this will not effect form fit or function of the device. Finding this under 30X, wow, why 30X????
Electronics Forum | Wed Mar 06 21:16:17 EST 2002 | davef
�What does 5 micrograms of chloride mean to me?� * With SIR testing, you can show no detrimental leakage currents under humid conditions, no corrosion, no metal migration, which are the big factors in figuring out electrochemical reliability. People
