Transcription of IPC-TM-650 Ionic Conductivity / Ion …
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IPC-TM-650 Ionic Conductivity / Ion …
1 PurposeThese tests are used as process controltools; they can be used to inspect printed boards or printedboard assemblies and determine if they conform to the moni-toring level of the user s performance specification. Bulk ioniccleanliness testing may be accomplished by measuring theionizable surface contaminants extracted by the followingthree methods:1. Manual extraction method2. Dynamic extraction method3. Static extraction methodNote:Please note that this method does not predict reliabil-ity and should only be used as a process control RestrictionsMeasurements of Ionic conductivities donot differentiate between different Ionic species. They simplymeasure conductivities (or resistivities) which can be related toamounts of Ionic materials present in solution. There is noidentification of the contribution to the total Conductivity read-ings of any individual Ionic species which may be extractedinto the solution. For measurement of individual Ionic species(type and level of residue) see IPC-TM-650 , Test , Ionic Analysis of Circuit Boards, Ion simplicity, amounts of Ionic materials in solution can beexpressed by a Conductivity factor which is equivalent to themeasured Conductivity contributed by a known amount of astandard, strongly ionized salt such as sodium chloride (NaCl).
extraction solution before measuring the resistivity of the com-posite sample. 4.2 Test Equipment and Chemicals 4.2.1 Miscellaneous laboratory ware (e.g., beakers, funnels, ...
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