Method for manufacturing coil component with magnetic base body formed using metal magnetic grains and resinate

A method for manufacturing a coil component, comprising steps of:

• providing multiple metal magnetic grains;
• preparing a magnetic body paste by mixing the multiple metal magnetic grains, a binder resin containing a resinate having at least one element selected from the group consisting of Si, Al, Cr, Mg, Ti, and Zr, and a solvent;
• forming a compact using the magnetic body paste;
• heat-treating the compact to form, on surfaces of the metal magnetic grains, bonding parts constituted by an amorphous oxide containing carbon and the at least one element selected from the group consisting of Si, Al, Cr, Mg, Ti, and Zr which consitutes the resinate, thereby forming a magnetic base body wherein the multiple metal magnetic grains are bonded via the bonding parts;
• forming a coil that includes a metal conductor;
• and
• forming external eletrodes on surfaces of the magnetic base body and connecting end parts of the coil to the external electrodes, respectively.