Inductor device

An inductor device, comprising:

• a plurality of coils comprising:
• a first winding comprising a plurality of first coils;
• and
• a second winding comprising a plurality of second coils;
• a first central connecting portion configured to couple the plurality of first coils and the plurality of second coils which are interleaved, so that a first one of the plurality of second coils is coupled to a second one of the plurality of second coils;
• and
• a plurality of side connecting portions configured on two sides of the first central connecting portion and each configured to couple the second one of the plurality of second coils to a third one of the plurality of second coils, so that the second one of the plurality of second coils and a first one of the plurality of first coils compose one of the plurality of coils of the inductor device;
• wherein the second one of the plurality of second coils is close adjacent to the third one of the plurality of second coils,
• wherein the plurality of first coils comprises a middle first coil, the plurality of second coils comprises an outermost second coil, and the plurality of side connecting portions each are further configured to couple the middle first coil and to couple the outermost second coil,
• wherein the plurality of side connecting portions each comprises:
• a first connecting member configured to couple a first part and a second part of the middle first coil;
• and
• a second connecting member configured to couple a third part and a fourth part of the outermost second coil, wherein the first connecting member and the second connecting member are intersected with each other, and the first connecting member and the second connecting member are in different layers.