In-situ laser-induced graphene from the quartz fiber-reinforced cyanate ester composite for assembly of functional electronics

Integrating functional electronics on advanced composites appeal significantly to the next-generation intelligent manufacturing industry, while assembling numerous surface-mounted components complexes the integration process. Herein, we propose an in-situ direct laser writing route to help relieving this issue. It can transform the resin from composite’s surface into graphene with controllable sheet resistance with values spanning four orders of magnitude. This controllable manufacturing is achieved by simply tuning the conversion rate of graphene of near-surface resin through varying the laser energy density input. Finally, LED parallel circuit and directly coupled amplifier (with an amplification factor of 8.47) have been demonstrated, using the formed graphene as both balanced resistance and conductive lines. This work emphasizes the customizable processing capabilities of direct laser writing technology for in-situ manufacturing of integrated functional electronics.