MULTILAYER FILM FOR ELECTRONIC CIRCUITRY APPLICATIONS AND METHODS RELATING THERETO

摘要

The present disclosure relates to a multilayer film for electronic circuitry applications, having advantageous barrier properties against unwanted electron and electromagnetic wave interference, and also protection against dirt or other similar-type unwanted foreign matter interference. The multilayer films of the present disclosure have at least three layers. The first outer layer contains a polyimide base polymer, a carbon black filler and a dielectric filler. The core layer is a polyimide with less than 5 weight percent filler. The second outer is similar to the first outer layer and contains a polyimide base polymer, a low conductivity carbon black filler and a dielectric filler. The two outer layers can be the same or different. Optionally, additional layers can also be used between the two outer layers.