Additively manufactured gas distribution manifold

A method for creating a heater on a tubular passage using additive manufacturing, the method comprising:

• providing the tubular passage;
• depositing a first flowable dielectric onto the tubular passage using a computer controlled first nozzle;
• curing the first flowable dielectric;
• depositing a resistive heating element onto the cured first flowable dielectric using a computer controlled second nozzle;
• curing the resistive heating element;
• depositing a second flowable dielectric onto the resistive heat trace using a computer controlled third nozzle, wherein the resistive heating element is interposed between the first cured flowable dielectric and the second flowable dielectric;
• and
• curing the second flowable dielectric.

A method for creating a heater on a tubular passage using screen printing, the method comprising:

• providing an additively manufactured tubular passage, wherein:
• the tubular passage follows a two-dimensional pathway and has an exterior surface that includes a runway,
• the runway includes a surface defined by a first profile that is swept along the pathway,
• the first profile is in a plane perpendicular to the pathway, and
• the first profile is substantially linear;
• screen-printing a first dielectric layer onto the runway;
• curing the first dielectric layer;
• screen-printing a resistive heating element onto the first dielectric layer;
• curing the resistive heat trace;
• screen-printing a second dielectric layer onto the resistive heating element, wherein the resistive heating element is interposed between the first dielectric layer and the second dielectric layer;
• and
• curing the second dielectric layer.