公开(公告)号：US09659705B2

公开(公告)日：2017-05-23

申请号：US14279032

申请日：2014-05-15

Applicant: TOKO, INC.

Inventor： Keita Muneuchi ,  Masaaki Totsuka ,  Chitoshi Sakai ,  Kunio Sasamori

IPC: H01F41/06 ,  H01F41/10 ,  H01F17/04 ,  H01F41/00 ,  H01F41/12 ,  H01F41/076 ,  H01F41/063 ,  H01F41/066 ,  H01F27/29

CPC classification number: H01F41/005 ,  H01F17/04 ,  H01F27/292 ,  H01F41/06 ,  H01F41/063 ,  H01F41/066 ,  H01F41/076 ,  H01F41/10 ,  H01F41/127 ,  H01F2017/048 ,  Y10T29/4902 ,  Y10T29/49071 ,  Y10T29/49073 ,  Y10T29/49174

Abstract: A method of producing a surface-mount inductor including an external electrode having high fixing strength with respect to an element body even in a high-humidity environment. The method includes the steps of: winding an electrically-conductive wire to form a coil; forming a core using a sealant primarily containing a metal magnetic powder and a resin in such a manner as to encapsulate the coil in the sealant while allowing each of opposite ends of the coil to be at least partially exposed on a surface of the core; reducing smoothness of a surface of at least a part of a portion of the core on which an external electrode is formed as compared to a surface therearound; and forming the external electrode on the core in such a manner as to be electrically conducted with the coil.