A method to quantify the surface insulation resistance performance of glob tops exposed to different temperature/humidity combinations

Often the only information that suppliers of glob top encapsulant and dam and fill materials provide for users of their materials is a single value of surface insulation resistance. This datum provides very little information about the encapsulant performance over the wide range of different humidity/temperature conditions that it may encounter in its service life. This procedure describes a simple method for characterising the performance of encapsulant materials over a broad range of environmental conditions. The resultant data can be used to assess the performance of different manufacturers´ formulations or types of encapsulant dispensed on to different board finishes or on to different board materials