METHOD FOR ADDITIONALLY FORMING ELECTRIC TERMINALS ON BOTH SIDE SURFACES OF COMPOSITE POWER INDUCTOR

摘要

Provided is a means that, in addition to two electric terminals formed at opposite ends of the bottom surface of an existing composite or power inductor, forms through a sputtering technique of electric terminals on the corresponding left and right side surfaces of the inductor which are connected to the terminals formed on the bottom surface, thereby significantly reinforcing a welding force of solder between the inductor and a circuit. Namely, a method for forming additional terminals on both side surfaces of an inductor is disclosed. The method comprises: a first step for obtaining a plurality of air-core coils (33) connected to one another, by continuing to wind an electric wire around each of a plurality of coil winding pins (31) in a coil winding plate (30); a second step for obtaining a primary shaped body (36) including a plurality of individual inductors (CI) therein, by placing the coil winding plate (30), in the state in which the air-core coils (33) are wound in the first step, in a molding machine (34') for molding the upper part of an inductor, injecting metal magnetic powder (35) into the molding machine (34'), and then making the powder subject to compression-molding; a third step for obtaining a secondary shaped body (37) having the plurality of individual inductors (CI) embedded therein, by moving the primary shaped body (36), from which the coil winding plate 30 is removed, from the molding machine in the second step to a molding machine (34") for molding the lower part of an inductor, adding the metal magnetic power (35) to the primary shaped body (36), and then making the powder subject to compression-molding; and a fourth step for simultaneously and integrally forming bottom terminals (Ta', Tb') and side terminals (Ta", Tb"), by boding masking shields (39) for terminal separation to the surface of the secondary shaped body (37) on which two bottom terminals are to be formed, depositing a metal film through a sputtering technique on elongated slits (40) formed between the masking shields in the longitudinal direction, and then detaching and removing the masking shields 39.