JPS61278011A - Manufacture of floating type magnetic head - Google Patents

Abstract

PURPOSE:To obtain a magnetic head which is excellent in its adhesive strength by applying the filming by a sputter to formation of one gap of a floating type magnetic head, and forming the other gap by means of glass penetration. CONSTITUTION:A glass thin film 8 of quartz glass, boro-silicate glass, lead glass, etc. is made to stik by sputtering to a front gap surface 5 for constituting a magnetic gap of one core 1, and also an inserting groove 3 of glass is provided on a back gap surface 4 of at least one core. Thereafter, the two cores 1, 2 are superposed, pressed by using a jig 10, and a frong adhesive glass 7 and a back glass 8 whose work temperature is lower than that of the sputter glass 8 are inserted, and heatd to a temperature of 600-800 deg.C by an electric furnace. The core 1 and the core 2 are formed as one body, and after cutting it, a floating type magnetic head of a monolithic type is obtained through a grinding process.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a floating magnetic head used in a magnetic disk device or a magnetic drum device.

2. Description of the Related Art Conventionally, a method for forming a gap in a ferrite core for a floating magnetic head is disclosed in Japanese Patent Laid-Open No. 50-44812, in which a glass frit is precipitated on the gap surface of at least one of a pair of ferrite cores by centrifugation. ,
After that, the baking is done and the glass film thickness is adjusted using wrapping tape, and after the two cores are overlapped, adhesive glass is inserted and the whole is heated under pressure to melt the gap glass and the adhesive glass to create a predetermined magnetic gap. As shown in Japanese Unexamined Patent Publication No. 39-28376, a spacer is placed between a pair of ferrite cores, the two cores are overlapped, adhesive glass is inserted, and the whole is heated under pressure. , the gap could be made with impregnated adhesive glass.

Problems to be Solved by the Invention However, in the former method, the adhesive strength is low, and in both cases, it is difficult to precisely control the magnetic gap (it is difficult to mass-produce the magnetic gap, and it is even more difficult to produce the magnetic gap in a core with a narrow gap).

This invention aims to eliminate the above-mentioned conventional drawbacks.

Means for Solving the Problems The present invention applies film deposition by sputtering to form one gap of a floating positive magnetic head, and forms the other gap by glass infiltration while taking advantage of the advantages of the sputtered film.

Effect: The above structure provides a method of manufacturing a magnetic head with excellent adhesive strength.

Example .

An embodiment of the present invention will be described below.

As shown in FIG. 1, a glass thin film 8 of quartz glass, borosilicate glass, lead glass, etc. is deposited by sputtering on the front gap surface 5 forming the magnetic gap of at least one core 1 forming the magnetic head. Further, a groove 3 for inserting glass is provided in the back gap surface 4 of at least one of the cores. Thereafter, the two cores 1 and 2 are stacked together and pressurized using, for example, a jig 10 as shown in FIG. and heated to a temperature of 600 to 800°C in an electric furnace. At this time, the back glass 6 must completely penetrate into the back cap, so it is best to have a low viscosity of 10''-103 poise. In order to prevent reaction with the sputter glass 8, it is preferable that the viscosity is around 104 voices.The front adhesive glass 7 and the back glass 6 both have a viscosity of 600 mm.
It must not react with the core at temperatures of ~800°C. 600
By keeping the temperature at ~800°C for 1 to 2 hours and then cooling, core 1 and core 2 are integrated, which is cut as shown in Figure 3 and then subjected to a grinding process to form the material as shown in Figure 4. This provides a monolithic floating positive magnetic head. In addition, when the magnetic gap length becomes a narrow gap of 0.5 μ or less, the back gap distance becomes O due to the deformation of the core.
Therefore, the back glass does not flow stably, but in such a case, as shown in Figure 5, when forming the glass thin film 8 by sputtering on the front magnetic gap, at the same time, a thin film 8 is also sputtered on a part of the back gap surface. It is also possible to form, stabilize the back gap, and flow the back glass.

Effects of the Invention As described above, the method for manufacturing a floating positive magnetic head according to the present invention combines a sputtering film deposition method and a glass infiltration method, making it possible to obtain a floating positive magnetic head with high adhesive strength. It is possible to provide a manufacturing method that is significantly superior to conventional manufacturing methods, which allows high accuracy of the magnetic gap and mass production.

[Brief explanation of the drawing]

1 to 4 sequentially show an example of the manufacturing method of the present invention, and FIG. 1 is a perspective view of a half-core core coated with a film by sputtering in contact with another half-core, and FIG. Fig. 2 is a side view showing the gap and the forming jig, Fig. 3 is a perspective view after gap forming heat treatment, Fig. 4 is a perspective view showing the completed state of the floating positive magnetic head after processing, and Fig. 5 is the present invention. It is a perspective view showing some steps of another example. ■, 2... Ferrite core 3... Back glass insertion groove 4... Back gap surface 5... Front cap surface 6... Back glass 7... Front adhesive glass 8 ...Name of sputtered film agent Patent attorney Toshio Nakao One idiot Figure 1
No.! Figure 2 Shin Tokukai Sho 6l-278011 (3) Figure 3 Figure 55 Figure 1 Shin C door-11-7

Claims (1)

[Claims] In a method of manufacturing a floating magnetic head in which a part of the magnetic circuit of the magnetic head core is also used as a floating slider, a glass thin film is sputtered on the front gap surface of at least one of the cores constituting the magnetic gap, and at least one A process of forming grooves into which glass rods are inserted in the back gap surfaces of the cores, then overlapping the two cores, inserting the front bonding glass and the back glass, and bonding the pair of cores together by applying pressure and heat to the entire core. A method of manufacturing a floating magnetic head, comprising: