Specific heater circuit track pattern coated on a thin heater plate for high temperature uniformity

A low volume heater plate comprising:

• heater circuit track pattern, coated on a substrate in order to achieve high uniform heat distribution and fast heating up, low power consumption and prevent current crowding with high fill factor;
• a substrate layer;
• a bottom layer of the low volume heater plate, wherein the bottom layer is electrically insulative;
• wherein the substrate layer is highly thermally conductive;
• wherein the substrate layer has a low heat capacity;
• wherein the substrate layer has a critical heating surface on one side and a heating circuit surface on another side;
• wherein the heater circuit track pattern includes
• a conductive layer;
• wherein the conductive layer is made of a highly conductive material;
• wherein the conductive layer is coated on the heating circuit surface;
• wherein the conductive layer has a plurality of power pads, a plurality of main power lines, a plurality of electrical transfer pads, and a plurality of sub-conductor lines;
• wherein the plurality of power pads, the plurality of main power lines, the plurality of electric transfer pads, and the plurality of sub conductor lines are made of a conductive material;
• wherein the plurality of power pads, the plurality of main power lines. the plurality of electrical transfer pads, and the plurality of sub conductor lines distribute power equally to a resistive layer;
• wherein the resistive layer, is coated on the heating circuit surface;
• wherein the resistive layer has a plurality of resistive portions formed by a resistive ink to heat up the heater plate;
• wherein the resistive plate and the low volume heater plate provide highly uniform heat distribution;
• wherein the resistive plate provides low heating up time, low power requirements, high fill factor, and prevents a current crowding phenomenon for the low volume heater plate;
• wherein the resistive layer has
• a first resistive portion, including a first portion resistive part defining a circular arc with a central angle of α=360°−Δθ, wherein Δθ is a smallest distance between the conductive or resistive parts, and
• a second resistive portion, encircling the first resistive portion. the second resistive portion including two second portion resistive parts defining a circular an with a central angle of β=180°−Δθ.