Wireless charging antenna arrays with enhanced coil uniformity and methods of producing the same

A method of forming a wireless charging array, the method comprising:

• providing a first insulating member having a first surface and an opposing second surface;
• patterning a first conductive trace on the second surface of the first insulating member;
• providing a second insulating member having a first surface and an opposing second surface;
• patterning a second conductive trace on the second surface of the second insulating member;
• stacking and compressing the first insulating member, the second insulating member and a third insulating member such that the first conductive trace is disposed between the second surface of the first insulating member and the first surface of the second insulating member, and the second conductive trace is disposed between the second surface of the second insulating member and the third insulating member;
• and
• wherein the first conductive trace has a first cross-sectional area that is different from a second cross-sectional area of the second conductive trace.