Layered heater system having conductive overlays
AssigneeWatlow Electric Manufacturing Company
InventorsElias Russegger, Gerhard Schefbanker, Martin Wallinger, Kevin Ptasienski
Life of this patent
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Abstract
A layered heater includes a resistive layer formed from a conductive material and separated into an intermediate area and a resistive circuit pattern by a plurality of cuts that extend all the way through the resistive layer. The resistive circuit pattern includes termination pads electrically connected to the resistive circuit pattern with the intermediate area being electrically inactive. A conductive overlay is disposed over a continuous portion of the resistive circuit pattern. The plurality of cuts extend longitudinally into the conductive overlay such that no portion of the resistive pattern is present outside the conductive overlay.
Claims20
A layered heater comprising:
- a resistive layer formed from a conductive material and including an intermediate area and a resistive circuit pattern spaced apart from the intermediate area by a plurality of cuts that extend all the way through the resistive layer, the resistive circuit pattern including termination pads electrically connected to the resistive circuit pattern with the intermediate area being electrically inactive due to separation from the resistive circuit pattern by the plurality of cuts, and a conductive overlay disposed over a continuous portion of the resistive circuit pattern,
- wherein at least one cut of the plurality of cuts has an end proximate the conductive overlay extending longitudinally into the conductive overlay such that no portion of the resistive pattern is present outside the conductive overlay proximate the end of the at least one cut.
A layered heater comprising:
- a substrate;
- a first dielectric layer formed on the substrate;
- a continuous resistive layer formed on the dielectric layer, the continuous resistive layer comprising a conductive material and including an intermediate area and a resistive circuit pattern spaced apart from the intermediate area by a plurality of cuts that extend all the way through the continuous resistive layer, the resistive circuit pattern having at least one bend portion and at least one straight portion;
- termination pads electrically connected to the resistive circuit pattern;
- the intermediate area being electrically inactive;
- a plurality of conductive overlays disposed on at least one of the at least one bend portion and the at least one straight portion;
- wherein at least one cut of the plurality of cuts has an end proximate an adjacent one of the conductive overlays extending longitudinally into the plurality of conductive overlays such that no portion of the resistive pattern is present outside the adjacent one of the conductive overlays proximate the end of the at least one cut;
- and
- a second dielectric layer formed over the resistive layer and the plurality of conductive overlays.
Dependencies are inferred from the claim text.