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The process uses a commercial laser that writes graphene patterns into surfaces that have so far included wood, paper and food.
According to Rice, the new iteration writes fine patterns of graphene into photoresist polymers. Baking the film increases its carbon content, and lasing solidifies the robust graphene pattern, after which unlased photoresist is washed away. Details of the PR-LIG process appear in
“This process permits the use of graphene wires and devices in a more conventional silicon-like process technology,” Tour said in a statement. “It should allow a transition into mainline electronics platforms.”
The Rice lab produced lines of LIG about 10 microns wide and hundreds of nanometres thick, which the team said is comparable to what can be achieved with more cumbersome processes that involve lasers attached to scanning electron microscopes.
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IMAGE: Rice University chemists have adapted their laser-induced graphene process to make conductive patterns from standard photoresist material for consumer electronics and other applications. view more
Credit: Tour Group/Rice University
HOUSTON - (May 6, 2021) - A Rice University laboratory has adapted its laser-induced graphene technique to make high-resolution, micron-scale patterns of the conductive material for consumer electronics and other applications.
Laser-induced graphene (LIG), introduced in 2014 by Rice chemist James Tour, involves burning away everything that isn t carbon from polymers or other materials, leaving the carbon atoms to reconfigure themselves into films of characteristic hexagonal graphene.
The process employs a commercial laser that writes graphene patterns into surfaces that to date have included wood, paper and even food.