Patent ID: 8901464
Filing Date: 2014-12-02
Classification: H05B,H05K,Y10T

Abstract:
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 each of the resistive layer and the protective layer are formed by a layered process selected from the group consisting of thick film, thin film, thermal spraying, and sol gel, and the thickness of the resistive circuit pattern varies along the length of the trace of the resistive circuit pattern to generate a variable watt density along the length of the trace of the resistive circuit pattern, wherein the resistive circuit pattern includes a curved portion and an inner portion of the curve portion is thicker than an outer portion of the curved portion.