D.B. Mitzi, C. Dimitrakopoulos, et al.
Chemistry of Materials
Printed wiring boards (PWB) are epoxy/fiberglass laminates onto which electrical components are mounted. Laminates used in PWB's must meet a wide range of requirements for performance and reliability, including a glass transition temperature (Tg)≥110°C, low water absorption, high thermal stability, flame retardancy and good dielectric properties. Replacement of the currently used petroleum based epoxy resin components with bio-based materials would reduce the environmental concerns with the fabrication, assembly, and disposal of PWB's. Lignin, a by-product of paper manufacturing, is the only common phenolic-based biopolymer. It is naturally hydrophobic and has good thermal stability. Initial resin formulations which contain at least 50% lignin exhibit acceptable thermal and electrical properties for PWB applications. Laminates formed from lignin based resins can be processed in a similar fashion to current laminates, minimizing the financial considerations of converting to this resin system.
D.B. Mitzi, C. Dimitrakopoulos, et al.
Chemistry of Materials
I. Dierking, L.L. Kosbar, et al.
Journal of Applied Physics
T. Graham, A. Afzali, et al.
Microlithography 2000
E. Babich, J. Paraszczak, et al.
ACS National Meeting 1989