Electronics Forum | Fri Oct 08 11:51:10 EDT 2004 | blnorman
Since you are using an Ionograph you need to use IPC-TM-650 method 2.3.25, static method. The test method is free on the IPC website. You'll need to get your customer to give you an acceptable cleanliness level to test to.
Electronics Forum | Mon Jan 08 20:57:52 EST 2001 | Dave F
Are you talking about bare board cleanliness or assembly level cleanliness? Bare board cleanliness is still primarily measured by resistivity of solvent extract (ROSE) using instruments such as Omegameters and Zero Ions. What is considered as "acce
Electronics Forum | Fri Dec 06 10:16:57 EST 2002 | davef
Bare board cleanliness is still primarily measured by resistivity of solvent extract (ROSE) using instruments such as Omegameters and Zero Ions. What is considered as "acceptable" cleanliness varies between specification and from company to company.
Electronics Forum | Thu Sep 17 12:08:13 EDT 1998 | Graham Naisbitt
Wayne, I think Dave and Justin are correct but I would just add my twopennworth: Your customer presumably wants to know if the end-product will be reliable? If he/she wants you to prove cleanliness, ask them for the spec they want to work to and app
Electronics Forum | Fri May 18 13:08:19 EDT 2012 | blnorman
I'll chime in here as well. If you have adhesion problems, 90% of the time it's contamination on the substrate (soldermask, flux residues, cleaner residues, etc.). Like Dave said, omega meter is a test for gross cleanliness, and it's OK for process
Electronics Forum | Thu Nov 02 17:15:48 EST 2006 | Mike Konrad
Asoe, The systems you are describing are Resistivity of Solvent Extract (ROSE) Testers. These systems are available using one of two technologies, Static or Dynamic. Both systems use a calibrated test solution comprised of IPA and DI water. The t
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
Electronics Forum | Mon Apr 15 22:37:27 EDT 2002 | davef
Regarding your customer suditor, it would have been nice if you said something like ... Routinely, our testing shall be less than 1.56 microgram/cm^2 NaCl equivalent ionic or ionizable flux residue, according to TM-650, Method 2.3.35 'Detection And
Electronics Forum | Mon Sep 08 14:29:04 EDT 2008 | davef
�Another direct measurement to determine resistivity values (i.e. of remaining no-clean residues) can be performed through impedance spectroscopy. The surface resistance underneath chip resistors and capacitors can be determined to show the improveme
Electronics Forum | Mon Oct 21 22:15:36 EDT 2002 | davef
First, SIR data is heavily dependant on the test pattern selected. Be very careful when comparing the results of resistance readings taken from different geometric patterns. Second, if yer talkin': * Bare boards, yupper. * Finished assemblies impor
