Sanyo Electric Co., Ltd.

Kazuaki Koyama

Yoshihiko Kawai

Isao Yasuda

Yorinobu Yoshisato

Yasuda, Isao

A magnetic head comprises a main core (41) made of sendust material and a pair of reinforcing cores (45) for holding the main core so that the main core is sandwiched between the pair of reinforcing cores, in which the main core is adhered to the pair of reinforcing cores by glass material through transition metal layers (48) formed on both sides of the main core. The main core is comprised of a pair of core halves (41a, 41b) having their respective transition metal layers formed on their contacting surfaces, the pair of core halves with transition metal layers (25) being adhered to each other by glass material (29).

Method of making a magnetic head

A magnetic head comprises a main core (1) made of sendust material or amorphous alloy and a pair of reinforcing cores (5,5) for holding the main core so that the main core is sandwiched between the pair of reinforcing cores. The main core (1) is comprised of a pair of core halves (1a, 1b), the pair of core halves being adhered to each other by glass material containing phosphorus pentaoxide (P.sub.2 O.sub.5) and barium oxide (BaO) as main constituent elements. P.sub.2 O.sub.5 is about 40% of the whole glass material and BaO is about 50% wt. of the whole glass material.

Magnetic head incorporating a glass composition of barium oxide and

Magnetic head

A magnetic transducer includes sendust center core having an opening and a head gap extending from the opening to one side of the center core, and a pair of reinforcing cores. Each of the reinforcing cores includes a ferrite plate and a glass member mounted on one side of the ferrite plate. The center core is sandwiched between the two reinforcing cores such that the glass members are located on opposite sides, respectively, of the center core where the head gap is formed, and that one side of the center core is in flush with, or projects from, respective side faces of the glass member. The glass member is formed by a material having an abrasiveness resistivity which is smaller than that of said center core.

Magnetic transducer

In a magnetic head including an inner core of metallic magnetizable material sandwiched between a pair of outer reinforcing cores each having a coil winding insertion opening formed in it, the inner core includes a first core block which has a front gap defining surface and a back or rear gap defining surface respectively provided at one side and the other side of the first core block and a coil winding recess provided in a position adjacent to the front gap defining surface, and which is formed, between the front gap defining surface and the coil winding recess, with a space or groove for setting the lower end of the front gap defining surface and a brazing material layer for connecting the space or groove with the coil winding recess, and a second core block to be combined with the first core block so as to constitute the inner core.

Growing community of inventors

Katano, Japan

Kazuaki Koyama