Delaware Patent of the Month – February 2022

Polymer Thick-Film (PTF) is a simple method of making cheap and reliable electronic circuits on printed circuit board (PCB) material. PTF circuits have been used as electrical elements for a long time. PTF pastes can be easily printed as dried films which have considerable resistive properties. DuPont Electronics, Inc. has used their world-class knowledge of PCB manufacturing and materials to modify these PTF circuits to be used in clothing. 

These modifications have introduced a flexibility and stretchability that allows them to move with fabric. It also ensures they can survive multiple wash and dry cycles without losing any conductivity. Their design uses a combination of conductive carbon black powder and organic mediums such as thermoplastic polyurethane resin. 

This PTF composition can be used for wearable heaters. This could be a simple solution for heated seats in a car, or heated gloves in the winter. Beyond this, stretchable and durable circuits can be used in near endless applications.

Are you developing new technology for an existing application? Did you know your development work could be eligible for the R&D Tax Credit and you can receive up to 14% back on your expenses? Even if your development isn’t successful your work may still qualify for R&D credits (i.e. you don’t need to have a patent to qualify). To find out more, please contact a Swanson Reed R&D Specialist today or check out our free online eligibility test.

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