Design and manufacturing of organic RFID circuits: Coping with intrinsic parameter variations in organic devices by circuit design

A detailed study of device characteristics and parameter variations of organic transistors on foil leads to the conclusion that design of p-type only digital circuits needs to focus on optimal yield, rather than on speed. From this perspective, subsequent generations of organic RFID tags have been realized, by increasing complexity (from 64 bit to 128 bit code generators), by adding functionality (Manchester encoding, anti-collision protocols), and by increasing data rate of the generated ID code (from 752 bits per second towards 50 kbit per second). As such, each of the requirements towards EPC compatible organic RFID tags is shown independently in code generators on foil, but not yet in a single RFID tag.