Apparatus, system and method of producing planar coils

A flexible planar inductive coil suitable for embedding in a product, comprising:

• at least one flexible substrate receptive to additive printing of inks;
• a set of successive additively printed ink layers, each matched to at least:
• a receptivity of the flexible substrate onto which the additively printed ink layers are printed;
• a conductivity of the substrate;
• and
• a chemical reactivity as between the substrate and each of the additively printed ink layers;
• the set of additively printed ink layers being successively located atop one another, each of the additively printed ink layers having a printed line height in a range of 4.58 μm+/−0.6 μm, and a base one of the successively located additively printed ink layers being located directly upon the at least one flexible substrate,
• the successive ones of the successively additively printed ink layers being successively located on the base one to in combination form at least one first additive concentrically successive conductive trace located and sized with alternating line widths and inter-line gaps about a first center axis, the first additive concentrically successive conductive trace being capable of receiving current flow from at least one source in at least one plane parallel to the at least one substrate;
• at least one via between successively additively printed layers, wherein the at least one via is substantially outside all of the successive conductive traces;
• and
• at least one second additive concentrically successive conductive trace about a second center axis, comprising a second set of successively additively printed ink layers, capable of receiving current flow through the at least one via from the first additive concentrically successive conductive trace;
• wherein at least one of the first or second additive concentrically successive conductive traces comprises a variable trace line width or a variable pitch.