Variable watt density layered heater
First Claim
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1. A layered heater comprising:
- a substrate;
a resistive layer formed on the substrate, the resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a trace having a length, a thickness, and a spacing; and
a protective layer formed on the resistive layer, wherein the thickness of the resistive circuit pattern varies along the length of the trace of the resistive circuit pattern for a variable watt density.
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Abstract
A layered heater is provided that includes at least one resistive layer having a resistive circuit pattern, the resistive circuit pattern defining a length, a width, and a thickness, wherein the thickness varies along the length of the resistive circuit pattern and/or the width of the resistive circuit pattern for a variable watt density. The present disclosure also provides layered heaters having a resistive circuit pattern with a variable thickness along with a variable width and/or spacing of the resistive circuit pattern in order to produce a variable watt density.
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Citations
21 Claims
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1. A layered heater comprising:
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a substrate;
a resistive layer formed on the substrate, the resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a trace having a length, a thickness, and a spacing; and
a protective layer formed on the resistive layer, wherein the thickness of the resistive circuit pattern varies along the length of the trace of the resistive circuit pattern for a variable watt density. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A layered heater comprising:
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a resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a trace having a length, a thickness, and a spacing;
terminal pads in contact with the resistive layer adapted to connect the resistive layer to a power source; and
a protective layer formed on the resistive layer, wherein the thickness of the resistive circuit pattern varies along the length of the trace of the resistive circuit pattern for a variable watt density. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 21)
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20. A layered heater comprising:
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a resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a trace having a length, a width, a thickness, and a spacing;
terminal pads in contact with the resistive layer adapted to connect the resistive layer to a power source; and
a protective layer formed on the resistive layer, wherein the thickness of the resistive circuit pattern varies across the width of the trace of the resistive circuit pattern for a variable watt density.
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Specification