High Temperature and High Reliability Performance of Electrically Conductive Film Adhesives for RF Grounding Applications

Abstract

Over the past decade, electronic parts have become smaller, more complex, and highly functional. This is well understood for many products within the consumer and handheld markets. Miniaturization, however, is also impacting sectors such as aerospace and automotive, pushing the limits of already harsh environments. As more power is driven through active devices, the integrity of materials used to provide the electrically conductive interfaces is becoming increasingly critical. For many applications, adhesive films have been the preferred material because they offer a variety of performance and operational advantages such high electrical and thermal conductivity, uniform bondlines, superior adhesion, and low processing temperatures. Today, as miniaturization pushes power-density limits and although devices are also being exposed to high operating temperatures, even for traditionally robust adhesive films, it is challenging to cope with these conditions. In sectors such as aerospace where high reliability is essential, material capability must evolve to deliver on fail-safe performance expectations. This study compares the performance of an established and widely used electrically conductive film adhesive with that of a newly developed film designed to provide improved mechanical performance over a higher elevated temperature range.

A Thermally Enhanced Film Adhesive for Assembling High Power Density Electronic Devices

“…Film adhesives were developed to overcome the limitations of liquid adhesives. These adhesives are typically a blend of solid resins, hardeners, and fillers, produced in a dry sheet format [1]. One of the main differences that distinguish films from liquid adhesives is room temperature viscosity.…”