CONFORMAL COATINGS FOR PRINTED CIRCUIT ASSEMBLIES.
Final rept., 1 July 61-30 June 63,
MOTOROLA INC RIVERSIDE CALIF
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This final report covers the research and development work done on conformal coatins and is divided into five phases Phase A - Evaluation of commercially available conformal coatings such as epoxies, polyurethanes, silicons, acrylics and polystyrene materials, and their ability to meet the requirements specified in PRC 61-SIMSA482 in order to obtain data for the preparation of a three services coordinated military specification. In this phase is also discussed the effect of coating thickness on insulation resistance and Q factor at 1, 50 and 100 mc under prolonged high humidity conditions. Phase B Investigation of methods for removing the conformal coating to permit replacement of parts when necessary without impairing the functional operations of the unit. Phase C - Evaluation, for upgrading purposes, of the allowable minimum spacing between conductors on uncoated and coated boards. Phase D - Study the effect of conformal coating on copper, gold and solderplated conductors with respect to their effect on Q factor and capacity at 1, 50 and 100 mc. Author