초록 ▼

The heater is formed from a substrate layer, a feeder buss layer, a dielectric layer, a PTF (polymer thick film) conductor or main buss layer, a PTC (positive temperature coefficient) thermistor layer and an external laminated adhesive layer. All of the layers are substantially coextensive. The feed

The heater is formed from a substrate layer, a feeder buss layer, a dielectric layer, a PTF (polymer thick film) conductor or main buss layer, a PTC (positive temperature coefficient) thermistor layer and an external laminated adhesive layer. All of the layers are substantially coextensive. The feeder buss layer, dielectric layer, main buss layer and PTC thermistor layers are preferably screen printed or otherwise selectively applied. The feeder buss layer includes first and second external electrical terminals formed on a single side thereof, and a buss for providing electrical communication from the first terminal to a connector diagonally removed from the second terminal. The connector and the second terminal provide electrical communication to diagonally opposed corners of the PTF conductor or main buss layer thereby providing relatively uniform current path distances through the thermistor layer.

대표청구항 ▼

[ What is claimed is:] [1.] A heater including:a substrate layer;a buss layer including a first terminal and a second terminal formed adjacent to a single side of said buss layer, and a first buss for providing electrical communication from said first terminal to an extended terminal portion, said e

[ What is claimed is:] [1.] A heater including:a substrate layer;a buss layer including a first terminal and a second terminal formed adjacent to a single side of said buss layer, and a first buss for providing electrical communication from said first terminal to an extended terminal portion, said extended terminal portion being formed on said buss layer at a distance from said second terminal greater than a distance between said first terminal and said second terminal;a selective conducting layer having a third terminal in communication with first conducting strips via a second buss and a fourth terminal in communication with second conducting strips via a third buss, said third terminal being in electric communication with said second terminal, said fourth terminal being in electrical communication with said extended terminal portion; anda thermistor layer providing electrical communication between said first conducting strips and said second conducting strips.