Fig. 1: Overview.
From: Biodegradable elastomeric circuit boards from citric acid-based polyesters
a POMaC pre-polymer is synthesized in a polycondensation reaction from 1,8-octanediol (OD), maleic anhydride (MA), and citric acid (CA). b Elastomeric Circuit Board fabrication. i. Thin films of POMaC are prepared by spin coating and then crosslinked. ii. Next, physical vapor deposition of conductive traces through a shadow mask is used to pattern circuits before films are laser cut and removed from the substrate. iii. POMaC circuit boards are then encapsulated by thermally crosslinking a POMaC top layer to the metallized bottom layer. iv. Surface-mount devices are attached by soldering to openings in the encapsulation layer.
