Inductor and manufacturing method thereof

A method for manufacturing an inductor comprising the steps of:

• molding a magnetic material prepared by blending a magnetic powder, a resin and a component to function as nuclei for applying electroless plating into a molded body having a desired shape so that an inner conductor functioning as an inductance element is embedded within the molded body, thereby forming a molded magnetic material member having a surface at which a portion of the inner conductor is exposed;
• forming a selectively coated molded body so that an area outside of an area to be provided with external electrodes on the surface of the molded magnetic material member is coated with an insulating resin;
• and
• forming the external electrodes including electroless plating films on the area to be provided with the external electrodes by applying electroless plating on the selectively coated molded body.

A method for manufacturing an inductor comprising the steps of:

• molding a magnetic material prepared by blending a magnetic powder with a resin into a molded body having a prescribed shape so that an inner conductor that functions as an inductance element is embedded within the molded body, thereby forming a molded magnetic material member having a surface at which a portion of an inner conductor is exposed;
• coating the entire surface of the molded magnetic material member with an insulating resin;
• removing the insulating resin coating in a region to be provided with external electrodes on the surface of the molded magnetic material member by a blast medium blowing method;
• roughening the exposed surface of the molded magnetic material member;
• and
• forming the external electrodes including electroless plating films on the region of the molded magnetic material member where the external electrodes are to be provided by applying electroless plating.

A method for manufacturing an inductor comprising the steps of:

• molding a magnetic material prepared by blending a magnetic powder, a resin and a component that functions as nuclei for applying electroless plating into a molded body having a prescribed shape so that an inner conductor that functions as an inductance element is embedded within the molded body, thereby forming a molded magnetic material member having a surface at which a portion of the inner conductor is exposed;
• coating the entire surface of the molded magnetic material member with an insulating resin;
• removing the insulating resin coating in a region to be provided with external electrodes on the surface of the molded magnetic material member by a blast medium blowing method;
• roughening the exposed surface of the molded magnetic material member;
• and
• forming the external electrodes including electroless plating films on the region of the molded magnetic material member where the external electrodes are to be provided by applying electroless plating.

An inductor comprising:

• a molded magnetic material member including a magnetic material having blended magnetic powder and resin;
• an inner conductor defining an inductance element and embedded within the molded magnetic material member;
• and
• external electrodes having a monolayer or multilayer structure including at least one electroless plating film layers that is provided on a roughened area on the surface of the molded magnetic material member;
• wherein the area not provided with the external electrodes on the surface of the molded magnetic material member is coated with an insulating resin.

An inductor comprising:

• a molded magnetic material member including a magnetic material having blended magnetic powder, resin a component functioning as nuclei for applying electroless plating;
• an inner conductor defining an inductor element embedded within the molded magnetic material member;
• and
• external electrodes having a monolayer or multilayer structure including at least electroless plating layers provided on a roughened area on the surface of the molded magnetic material member;
• wherein the area not provided with the external electrodes on the surface of the molded magnetic material member is coated with an insulating resin.