Wireless charging coil and manufacturing method thereof

Abstract

A method for manufacturing a wireless charging coil, comprising the steps of: providing a first elastic body and a second elastic body and stretching the first elastic body and the second elastic body; respectively stretching the first elastic body and the second elastic body The first inner layer circuit layer and the second inner layer circuit layer are formed on the upper layer, the first inner layer circuit layer and the second inner layer circuit layer both include a plurality of parallel lines, and the extending direction of the lines of the first inner layer circuit layer The extension direction of the line of the second inner circuit layer is perpendicular to the stretching direction of the first elastic body and the second elastic body respectively; the tension is released to make the stretched first elastic body and the second elastic body retract to The original state, thereby forming the first circuit substrate intermediate body and the second circuit substrate intermediate body respectively; pressing the first circuit substrate intermediate body and the second circuit substrate intermediate body, the extending direction of the circuit of the first inner layer circuit layer and the second The extending directions of the lines in the inner line layer are perpendicular to each other. The invention also provides a wireless charging coil.

Description

technical field [0001] The invention relates to a wireless charging coil and a manufacturing method thereof. Background technique [0002] When wireless charging technology is about to become a new favorite in the field of consumer electronics, it has become a trend to use flexible circuit boards to make wireless charging coils. Nowadays, flexible circuit boards are often used to make wireless charging coils. Generally, thick copper double-sided boards are used to make conductive lines to form wireless charging coils. However, thick copper is not easy to make lines with small line spacing, and if the lines made of thick copper If it is filled and exposed to the air, there is a risk of oxidation and contamination of the wiring, so the miniaturization of the coil cannot be achieved. Contents of the invention [0003] In view of this, the present invention provides a thick copper fine-pitch wireless charging coil capable of miniaturizing the coil and a manufacturing method t...

AI Technical Summary

Problems solved by technology

Nowadays, flexible circuit boards are often used to make wireless charging coils. Generally, thick copper double-sided boards are used to make conductive lines to form wireless charging coils. However, thick copper is not easy to make lines with small line spacing, and if the lines made of thick copper If it is filled and exposed to the air, there will be a risk of oxidation and contamination of the circuit, so the miniaturization of the coil cannot be realized

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