Variable watt density layered heater
First Claim
1. A layered heater comprising:
- a dielectric layer;
a resistive layer formed on the dielectric layer, 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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Accused Products
Abstract
A layered heater is provided with a resistive layer having a resistive circuit pattern, the resistive circuit pattern defining a length and a thickness, wherein the thickness varies along the length of the resistive circuit pattern for a variable watt density. The present invention 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. Methods are also provided wherein the variable thickness is achieved by varying a dispensing rate of a conductive ink used to form the resistive circuit pattern, varying the feed rate of a target surface relative to the dispensing of the ink, and overwriting a volume of conductive ink on top of a previously formed trace of the resistive circuit pattern.
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Citations
11 Claims
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1. A layered heater comprising:
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a dielectric layer; a resistive layer formed on the dielectric layer, 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 dielectric layer; at least one resistive layer formed on the dielectric layer, the resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a trace having a width and a spacing; and a protective layer formed on the at least one resistive layer, wherein a 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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11. A layered heater comprising:
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a substrate; a dielectric layer formed on the substrate; a resistive layer formed on the dielectric layer, the resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a trace having a length and a thickness; 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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Specification