Patent ID: 9570227
Date: 2017-02-14
CPC Classifications: H01F

Claim:
1. A magnetic excitation coil structure, comprising: a magnetic coil sheet formed of a thin film, rolled as a cylindrical body with a hollow hole, and comprising a flexible substrate, a dielectric layer attached to the flexible substrate, and a plurality of patterned circuit layers embedded in the flexible substrate and in contact with the dielectric layer such that upper surfaces of the patterned circuit layers and an upper surface of the flexible substrate form a co-plane flush and in contact with a bottom surface of the dielectric layer; and an insulation layer covering an outer surface of the cylindrical body formed by the magnetic coil sheet for protection, wherein the patterned circuit layers are formed of an electrically conductive material and horizontally configured in the flexible substrate, any two of the patterned circuit layers are electrically separated, the flexible substrate is formed of a flexible electrical insulation material, the dielectric layer is formed of a dielectric material, and the insulation layer is formed of an electrical insulation material.