High electrical reliability glass-polymer laminates

Abstract

Low-alkali boroaluminosilicate glasses have attracted increasing attention in high temperature dielectric applications due to their excellent dielectric and mechanical properties, and superior thermal stability. Here, we explore an effective approach to greatly improve the electrical reliability of a low-alkali glass by coating a thin polymer layer on top of the glass. In particular, it is shown that the primary breakdown mechanism of the glass is associated with the intensified electric fields in the depletion layers, and the polymer coating can substantially mitigate the local fields in the depleted regions, thus leading to a markedly improved distribution of electrical failures for the glass-polymer laminate. The laminate can exhibit a large breakdown strength of 10.5 MV/cm and a significantly increased Weibull shape parameter of 49.