Since its discovery, laser-induced graphene (LIG) has attracted much interest because this technique, having all the advantages of a laser processing technology, is more convenient and cost-effective than other graphene production methods. This work offers a detailed analysis of LIG structures produced by UV and CO₂ laser irradiation from polyimide performed with surface scanning Raman spectroscopy combined with microscopy techniques. Although UV LIG has a less ordered structure than that obtained by CO₂ laser irradiation, our study indicates that UV LIG can be patterned with a resolution higher than that obtained with CO₂ laser irradiation and a much smaller penetration depth into the substrate.

Since its discovery, Laser Induced Graphene (LIG) attracted much interest because this technique, having all the advantages of a laser processing technology, is more convenient and cost-effective than other graphene production methods. This work offers a detailed analysis of LIG structures produced by UV and CO2 laser irradiation from polyimide performed with surface scanning Raman spectroscopy combined with microscopy techniques. Although UV LIG has a less ordered structure than that obtained by CO2 laser irradiation, our study indicates that UV LIG can be patterned with a resolution higher than that obtained with CO2 laser irradiation and much smaller penetration depth into the substrate.