Inductor and manufacturing method thereof, filter and electronic device

A method for manufacturing an inductor, comprising:

• providing a first dielectric substrate, wherein the first dielectric substrate comprises a first surface and a second surface opposite to each other along a thickness direction of the first dielectric substrate, the first dielectric substrate is provided with first connection vias penetrating through the first dielectric substrate along the thickness direction of the first dielectric substrate, and a first groove penetrating through a part of the first dielectric substrate in the thickness direction of the first dielectric substrate;
• and
• forming first sub-structures on the first surface;
• forming second sub-structures on the second surface;
• forming first connection electrodes in the first connection vias, forming a magnetic core in the first groove;
• wherein the first sub-structures and the second sub-structures are sequentially connected together through the first connection electrodes to form a coil structure of the inductor;
• and the magnetic core is insulated from the first sub-structures and the second sub-structures to be in the coil structure.

A filter, comprising an inductor, which comprises:

• a first dielectric substrate comprising a first surface and a second surface opposite to each other along a thickness direction of the first dielectric substrate, wherein the first dielectric substrate is provided with first connection vias penetrating through the first dielectric substrate along the thickness direction of the first dielectric substrate, and a first groove penetrating through a part of the first dielectric substrate in the thickness direction of the first dielectric substrate;
• first sub-structures on the first surface;
• second sub-structures on the second surface;
• first connection electrodes in the first connection vias, wherein the first sub-structures and the second sub-structures are sequentially connected together through the first connection electrodes to form a coil structure of the inductor;
• and
• a magnetic core arranged in the first groove and insulated from the first sub-structures and the second sub-structures to be in the coil structure.