Electronics Forum | Sat May 16 19:31:27 EDT 1998 | Graham Naisbitt
Gentlemen, Please consider that ionic testing is designed only for detecting ionic contaminants. Yes there are instances of non-ionic contaminants that cause premature circuit failure. However, more importantly the prevailing specs are less than adeq
Electronics Forum | Fri May 15 10:51:12 EDT 1998 | Justin Medernach
| We understand that testing for ionic contamination and surface insulation resistance measure different properties. We assemble printed circuit boards for other companies. We will not get combs on 90% of the boards that we assemble. | We have no c
Electronics Forum | Fri May 15 12:01:34 EDT 1998 | Justin
| | We understand that testing for ionic contamination and surface insulation resistance measure different properties. We assemble printed circuit boards for other companies. We will not get combs on 90% of the boards that we assemble. | | We have
Electronics Forum | Mon Jan 21 19:22:38 EST 2008 | davef
In your situation, the issue is the compatibility of your flux residues and the encapsulant that you choose. First, contact your encapsulant supplier for advice. They've likely been down this road with other customers and may be able so save you som
Electronics Forum | Fri Nov 20 08:51:34 EST 2009 | Sean
Hello, This is interesting topic that I would like to share and discuss with you.. I came across few projects from various SMT factories where its product(Computer) reach field, experience No Post/boot defect. This problem become very obvious when
Electronics Forum | Mon Jun 11 22:06:00 EDT 2001 | davef
The issue is not the cleanliness of your in-bound water. The issue is the cleanliness of the board your customer receives. Look at J-STD-001C, Para 8, "Cleanliness Requirements". The end product cleanliness is the end result of your: * In-bound
Electronics Forum | Tue Jun 12 18:06:17 EDT 2001 | davef
The criterion you use will depend on the test method you select. For minimum requirements, look at J-STD-001C, Para 8, "Cleanliness Requirements". I figure that you�d measure the residues on a lot of your current product, measure the res on a lot o
Electronics Forum | Mon Jul 30 21:03:44 EDT 2001 | davef
You should specify the level of res based on the effect of the res on the end-use of the product. J-STD-001 defines cleanliness requirements for ALL flux types, including water soluble and no-clean that you mention. 1 There is no equivalency betwee
Electronics Forum | Fri May 15 18:09:00 EDT 1998 | Earl Moon
| | | We understand that testing for ionic contamination and surface insulation resistance measure different properties. We assemble printed circuit boards for other companies. We will not get combs on 90% of the boards that we assemble. | | | We h
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
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