Wearable physiological characteristic monitoring device

A method of manufacturing a wearable physical characteristic monitoring (PCM) device, the method comprising:

• providing a substrate being composed of a starch-based material;
• forming two or more electrical traces as laser-induced graphene (LIG) in the substrate;
• mounting a set of electrical components for electrical communication between two of the two or more electrical traces:
• a first electrical component comprising a sensor that provides a signal responsive to physiological characteristics of a patient wearing the PCM device, and a second electrical component comprising a communication device to communicate physiological characteristics data from the PCM device;
• applying a starch-based layer to the substrate to cover the two or more electrical traces and one or more electrical components in the set of electrical components;
• and
• curing the starch-based layer to combine the starch-based layer and the substrate.