Patent ID: 8643455

Claim:
A coil component characterized by comprising: a magnetic core integrally having a sheet part and a pillar part formed on a top face of the sheet part; a pair of first conductive films formed from a side face to a bottom face of the sheet part of the magnetic core; a coil integrally having a spiral part where a conductive wire whose cross-section shape is a rectangle having a long side and a short side is spirally wound, and a one end of the conductive wire and an other end of the conductive wire are drawn from the spiral part, wherein the spiral part is placed around the pillar part of the magnetic core, and the long side at the one end of the conductive wire is joined to a surface of the side face of the one first conductive film, while the long side at the other end of the conductive wire is joined to a surface of the side face of the other first conductive film; a magnetic sheath formed so as to cover each of: the top face of the pillar part and the side face of the sheet part of the magnetic core, surfaces of the side faces of the first conductive films, and surfaces of the spiral part, one end of the conductive wire, the joined part at the one end of the conductive wire, the other end of the conductive wire and the joined part at the other end of the conductive wire, of the coil; a pair of second conductive films formed from a side face of the magnetic sheath to a bottom face of the sheet part of the magnetic core, via a bottom face of the magnetic sheath, so that the surfaces of the bottom faces of the first conductive films are covered, respectively; and a pair of third conductive films formed so as to cover surfaces of the respective second conductive films; wherein the one first conductive film, one second conductive film and one third conductive film constitute a first external terminal, while the other first conductive film, other second conductive film and other third conductive film constitute a second external terminal; wherein the joined part at the one end of the conductive wire and the joined part at the other end of the conductive wire of the coil are sandwiched by the side faces of the first conductive films and a part of the magnetic sheath covering the side face of the sheet part of the magnetic core, respectively; and wherein the parts of the magnetic sheath covering the surface of the joined part at the one end of the conductive wire and the surface of the joined part at the other end of the conductive wire are sandwiched, with each joined part in between, by the side face of each of the first conductive films and the side face of each of the second conductive films as well as the side face of each of the third conductive films, respectively.