Patent ID: 9659705
Date: 2017-05-23
CPC Classifications: H01F,Y10T

Claim:
1. A method of producing a surface-mount inductor having a coil encapsulated in a core, comprising the steps of: winding an electrically-conductive wire to form the coil such that each of opposite ends of the wire is positioned on an outer periphery of the coil; forming the core using a sealant primarily containing a metal magnetic powder and a resin to encapsulate the coil in the core in such a manner that a surface of each of opposite ends of the coil is exposed and extended on a surface of the core; reducing smoothness of a surface of the core in an area of the core for forming an external electrode as compared to a surface around the area; and forming the external electrode on the core in such a manner as to be electrically conducted with the coil, by applying an electrically-conductive paste containing a thermosetting resin and metal particles on the area of the core for forming the external electrode, entering the electrically-conductive paste into concave portions on the surface of the core formed in a portion of the core where smoothness is reduced and curino the core and the electrically-conductive paste.