layer 13 4 a heat activated adhesive layer 14 and 5 a relatively thin pressure sensitive adhesive psa layer 15 top woven polymeric sheet or synthetic layer 11 may include a pi pen or pet substrate that is relatively resistant to high temperatures including temperatures that may be at least 200 u00b0 c or more in one form the top layer 11 may include a pi layer that is 30 u03bcm to 100 u03bcm in thickness secondary antenna layer 13 may be provided on a woven textile or fabric or plastics pen substrate secondary antenna layer 13 may include a 17 u03bcm 35 u03bcm thick etched copper layer to provide the radiating loop of the secondary antenna an optional over layer 16 such as polycarbonate sheet or polyester fiber and a polyurethane primer layer 17 may be applied over top layer 11 to make the thermo patch assembly 10 printable and or waterproof primer layer 17 may include a 30 to 40 u03bcm thick white printable polymeric varnish or a white pet pen laminated overlay heat activated adhesive layer 14 may include a 50 u03bcm thick polyurethane adhesive layer such as a layer of hot melt glue psa layer 15 may include a 20 u03bcm acrylic layer with room temperature tack to hold in place rfid tag 18 a plurality of thermo patch assemblies 10 may be optionally applied to a carrier reel or tape including a u201c siliconized u201d or release.