Methods of forming a variable watt density layered heater
AssigneeWatlow Electric Manufacturing Company
InventorsKevin Ptasienski, James McMillin, Thomas T. Nagl, Rolando O. Juliano
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Abstract
Methods of forming a layered heater are provided that comprise at least one resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a length, a thickness, and a spacing, wherein the thickness varies along the length of the trace of the resistive circuit pattern for a variable watt density. The methods include achieving the variable thickness 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.
Claims20
A method of forming a trace of a resistive circuit pattern of a layered heater, the trace defining a length, a width, and a spacing, the method comprising the steps of:
- (a) dispensing a conductive ink through an orifice of a single writing tip at a rate onto a surface;
- and
- (b) selectively varying the dispensing rate of the conductive ink through the orifice of the writing tip to form a variable thickness trace of the resistive circuit pattern.
A method of forming a trace of a resistive circuit pattern of a layered heater, the method comprising the steps of:
- (a) dispensing a conductive ink through an orifice of a single writing tip at a rate onto a surface;
- and
- (b) selectively varying a feed speed of the substrate relative to the dispensing of conductive ink through the orifice of the writing tip to form a variable thickness trace of the resistive circuit pattern.
A method of forming a trace of a resistive circuit pattern of a layered heater, the method comprising the steps of:
- (a) applying a volume of conductive ink onto a surface with a single dispensing element to form the trace;
- and
- (b) subsequently applying an additional volume of conductive ink onto the trace with the single dispensing element after the volume of step (a) has been applied along the entire trace,
- wherein a variable thickness trace of the resistive circuit pattern is produced.
A method of forming a trace of a resistive circuit pattern of a layered heater, the trace defining a length, a width, and a spacing, the method comprising forming the trace with a variable thickness.
Dependencies are inferred from the claim text.