Coil component, method for manufacturing coil component, and electronic/electric device

A method for manufacturing a coil component to manufacture a coil conductor portion having a spiral shape with a first direction as a winding axis direction, the method comprising:

• forming an insulating negative pattern on a conductive layer of a substrate having the conductive layer on a main surface whose normal is the first direction;
• forming a first conductor portion by an electroplating process in which an electric current is applied to the conductive layer;
• removing the negative pattern;
• removing the conductive layer exposed by removal of the negative pattern;
• and
• forming a second conductor portion so as to cover an exposed portion of the first conductor portion,
• wherein:
• the negative pattern has a stripe portion in which a plurality of lines are aligned in a second direction that is one of in-plane directions of the main surface, and
• formation of the stripe portion includes performing exposure such that a portion distal from the substrate in a sheet-shaped negative resist provided on the main surface is positioned in front of a depth of focus.

A coil component, comprising:

• a coil conductor portion including a portion formed with a spiral shape, where a first direction serves as a winding axis direction, and including more than one turn aligned in a second direction intersecting the first direction,
• wherein the coil conductor portion further comprises:
• a first conductor portion made of a first conductive material and having a portion extending along an extending direction of the turn;
• and
• a second conductor portion made of a second conductive material and provided so as to cover at least a part of the first conductor portion,
• wherein:
• when the turn is cut along a plane including the first direction and the second direction to obtain a first cross section,
• among lines forming an outer shape of the first conductor portion in the first cross section, two lines aligned in the second direction are divided into two equal parts in the first direction to define a first region R1 and a second region R2 from one end side,
• among lines forming an outer shape of the turn in the first cross section, two lines aligned in the second direction are divided into two equal parts in the first direction to define a third region R3 and a fourth region R4 from the one end side, and
• for an average inclination angle of each region with respect to the first direction, when an inclination in a direction in which the two lines approach each other is defined as positive,
• the average inclination angle θ1 of the first region is larger than both the average inclination angle θ2 of the second region and the average inclination angle θ3 of the third region.