Patent ID: 7367114

Claim:
A method of manufacturing a positive temperature coefficient (“PTC”) device comprising the steps of: providing a first substrate; placing primary electrodes on at least a portion of opposite surfaces of the first substrate; providing a PTC material over the electrodes and the opposite surfaces of the first substrate; placing secondary electrodes on at least a portion of the PTC material on opposite sides of the first substrate; placing insulative substrates on at least a portion of each of the secondary electrodes; forming at least one first aperture through at least one of the insulative substrates by plasma etching, said at least one first aperture terminating at one of the secondary electrodes; forming at least one second aperture through at least one of the insulative substrates and PTC material by plasma etching, said at least one second aperture terminating at one of the primary electrodes; and electrically coupling the secondary electrodes and primary electrodes to terminals.