JPH081115U - Magnetic head - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention allows a narrow gap to be defined even when core halves composed of a plurality of magnetic films laminated on a non-magnetic substrate are butted. It is an object of the present invention to provide a magnetic head capable of high density recording. [Structure] A pair of core halves 1 composed of a plurality of magnetic films 12b and 13b laminated on non-magnetic substrates 12a and 13a.
Butt 1 and 12 are butted against each other so that the magnetic film extends perpendicularly to the gap.
In the magnetic head 10, the gap forming portions 13c, 1 of the abutting surfaces 13, 14 of the core halves are defined.
The magnetic head 10 is configured so that 4d includes a magnetic film parallel to the gap portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic head used in, for example, a high-density magnetic recording / reproducing device such as a high-definition VTR device.

[0002]

[Prior art]

 Conventionally, such a magnetic head is configured as shown in FIG. 4, for example. That is, in FIG. 4, the magnetic head 1 is composed of a pair of core halves 2 and 3 composed of a plurality of magnetic films 2b and 3b laminated on the non-magnetic substrates 2a and 3a, Gap forming portions 4a and 5a and rear joint portions 4b and 5b are formed on the abutting surfaces 4 and 5 of the core halves 2 and 3, respectively.

Here, the abutting surfaces 4, 5 of the core halves 2, 3 are configured so that the gap portions 6 can be formed by abutting the gap forming portions 4 a, 5 a at a predetermined interval. Has become. Further, the magnetic films 2b and 3b forming the core halves 2 and 3 extend perpendicularly to the gap portion 6.

Further, one core half 2 is provided with a groove portion 4c on the side of the abutting surface 4 on which a winding is wound, and this groove portion 4c is joined to the other core half 3. By defining the winding window 7 at this time, a coil winding (not shown) can be wound around the groove portion 4c of the core half 2 through the winding window 7. There is.

According to the magnetic head 1 configured as described above, the gap portion 6 defined by the gap forming portions 4a and 5a of the core halves 2 and 3 has the entire thickness of the magnetic material films 2b and 3b. However, since it corresponds to the track width, it can correspond to a wide band.

Therefore, a magnetic tape (not shown) slides along the curved upper surfaces of the cores 2 and 3 of the magnetic head 1 so that magnetic recording is performed on the magnetic tape. The data and so on can be converted into an electric signal by the coil winding and can be reproduced.

[0007]

[Problems to be solved by the device]

 However, in the magnetic head 1 configured as described above, when the abutting surfaces 4 and 5 of the core halves 2 and 3 are polished when the core halves 2 and 3 are manufactured, the core halves 2 and 3 are polished. Since the magnetic material films 2b and 3b made of different materials are laminated on the non-magnetic material substrates 2a and 3a, respectively, after polishing, the non-magnetic material substrates 2a and 3a and the magnetic material films 2b and 3b are As shown in FIG. 5, a step will be formed between 3b and 3b.

Therefore, when the core halves 2 and 3 are joined, as shown in FIG. 6, a gap based on the step is generated, so that a narrow gap portion 6 of, for example, 0.2 μm or less is defined. However, it is difficult to record in a wide band such as 0 to 100 MHz, and high density recording cannot be achieved.

According to the present invention, in view of the above points, a narrow gap portion can be defined even when the core halves made of a plurality of magnetic films laminated on a non-magnetic substrate are butted. Therefore, it is an object of the present invention to provide a magnetic head capable of high density recording.

[0010]

[Means for Solving the Problems]

 According to the present invention, according to the present invention, a pair of core halves composed of a plurality of magnetic films laminated on a non-magnetic substrate are butted against each other so that the magnetic films are perpendicular to the gap. In the magnetic head in which the gap is defined so as to extend, in the region of the abutting surface of each core half, the core half removes the portion of the non-magnetic substrate, leaving the magnetic film. At the same time, it is achieved by a magnetic head characterized in that the gap forming portion of the abutting surface is provided with a magnetic film parallel to the gap portion.

[0011]

[Action]

 According to the above configuration, since the non-magnetic substrate is removed from the abutting surface of the core half, only the laminated magnetic film is polished during polishing. Since there is no step on the butt surface of the slab and therefore it is formed substantially flat, a relatively narrow gap portion can be defined when butting each other.

Therefore, high-density recording becomes possible, and magnetic lines of force run perpendicularly from the head sliding surface along the magnetic film, that is, the gap portion, so that higher-density recording can be performed more easily. You will get it.

[0013]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 shows an embodiment of a magnetic head according to the present invention.

The magnetic head 10 is composed of a pair of core halves 11 and 12 composed of a plurality of magnetic substance films 12 b and 13 b laminated on the non-magnetic substance substrates 12 a and 13 a. The gap forming portions 13c and 14d and the rear joint portions 13b and 14b are formed on the abutting surfaces 13 and 14 of the first and second portions 12, 12, respectively.

Further, one core half body 11 is provided with a groove portion 13e on the side of the butting surface 13 on which the winding is to be wound, and this groove portion 13e is joined to the other core half body 12. By defining the winding window, the coil winding (not shown) can be wound around the groove 13e of the core half 11 through the winding window.

The above structure is similar to the conventional magnetic head 1 shown in FIG. 4, but in the magnetic head 10 according to the present invention, the abutting surfaces 13, 14 of the core halves 11, 12 are abutted. As shown in detail in FIG. 2, magnetic thin films 15 and 16 made of a metal, which is a ferromagnetic material such as Fe, Al, and Si, are formed on the surface of the film, so that they are brought into abutment with each other. When bonded, the gap portion 17 having the metal magnetic films 15 and 16 can be formed.

At this time, the magnetic films 12b and 13b forming the core halves 11 and 12 are arranged to extend perpendicularly to the gap portion 17, and the metal magnetic films 15 and 16 are It will extend parallel to the gap portion 17.

As will be described later, the core halves 11 and 12 have non-magnetic substrates 12a whose abutting surfaces 13 and 14 form the core halves 11 and 12 before they are joined to each other. , 13a are removed and then polished, and then the metal magnetic films 15 and 16 are formed in the vicinity of the upper surface to which the magnetic tape is to be abutted, so that it can be configured.

Here, the magnetic head 10 is manufactured as shown in FIG. That is, first, in FIG. 3 (A), the substrate 20 has a plurality of magnetic films 22 (see FIG. 3B) on a non-magnetic substrate 21 made of a ceramic material such as ceramics or glass ceramics. As shown in FIG. 3C, a plurality of individual substrates laminated with the glass 23 in between are stacked and bonded to each other to form the substrate.

The substrate 20 thus formed is then reinforced on the side surface facing up and down in the drawing and the winding groove 24 on the side surface facing up again, as shown in FIG. 3 (D). After the groove 25 is processed and the reinforcing glass 25 is filled with the bonding glass 26, the upper bonding surface 20a is polished in the drawing.

Thereafter, with respect to the bonding surface 20a, a track groove 27 is processed on the bonding surface 20a so as to remove the non-magnetic substrate 21 while leaving the portions of the magnetic films 22 (see FIG. 3E). )), And subsequently, as shown in FIG. 3F, a magnetic thin film 28 is formed in the joint surface 20a and the track groove 27, and the track groove 27 is filled with a bonding glass 29. After that, the joint surface 20a is polished again (see FIG. 3 (H)).

Further, a gap material 30 is formed in the remaining region of the bonding surface 20a by sputtering or the like (see FIG. 3 (I)), and a plurality of core halves are integrally arranged in a core half. The body block 31 is completed.

As shown in FIG. 3 (J), the two core half blocks 31 thus formed are joined so that their joint surfaces 20 a face each other. After the end surface is polished, the tape sliding surface 20b exposing the track groove 27 is polished into a cylindrical shape as shown in FIG. 3 (K), and finally shown in dotted line in FIG. 3 (L). As described above, the individual magnetic heads 10 are completed by slicing along the longitudinal direction.

The magnetic head 10 according to the present invention is configured as described above, and the gap portion 17 defined by the gap forming portions 13c and 14d of the core halves 11 and 12 has the core halves 11 and 12, respectively. Can be defined by the metal magnetic films 15 and 16 formed on the surfaces of the butted surfaces 13 and 14. As a result, the magnetic tape (not shown) slides along the curved upper surfaces of the cores 11 and 12 of the magnetic head 10 to record the data magnetically recorded on the magnetic tape. Etc. can be converted into an electric signal by the coil winding and reproduced.

Further, according to the present magnetic head 10, the abutting surfaces 13, 14 of the core halves 11, 12 have the non-magnetic substrates 12a, 13a with the magnetic films 12b, 13b left in advance. Since it is removed by forming the track groove 27, a step is not generated by polishing. As a result, the gap portion 17 can be defined as a narrow gap of, for example, about 0.2 μm or less, which enables high density recording.

At this time, magnetic force lines run in the vertical direction from the head sliding surface through the metal magnetic films 15 and 16 extending along the gap portion 17, so that higher density recording can be easily performed. You will get it.

[0027]

[Effect of device]

 As described above, according to the present invention, even when the core halves composed of a plurality of magnetic films laminated on the non-magnetic substrate are abutted with each other, the narrow gap portion can be defined, and thus the high gap can be formed. It is possible to provide an extremely excellent magnetic head that enables density recording.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a magnetic head according to the present invention.

FIG. 2 is an enlarged plan view of a gap portion of the magnetic head of FIG.

3A to 3C are process diagrams sequentially showing a manufacturing process of the magnetic head of FIG.

FIG. 4 is a schematic perspective view showing an example of a conventional magnetic head.

5 is an enlarged cross-sectional view of the gap portion of the magnetic head of FIG. 4 after polishing.

FIG. 6 is an enlarged cross-sectional view of the gap portion of the magnetic head of FIG. 4 after joining.

[Explanation of symbols]

 10 magnetic head 11,12 core half body 12a, 13a, 21 magnetic substance substrate 12b, 13b, 22 magnetic substance film 13, 14 abutting surface 13c, 14d gap forming part 13b, 14b rear joint part 13e groove part 15, 16 metal magnetic film 17 Gap Part 20 Substrate 23 Glass 24 Winding Groove 25 Reinforcing Groove 26, 29 Bonding Glass 27 Track Groove 28 Magnetic Thin Film 30 Gap Material 31 Core Half Block

[Procedure amendment]

[Submission date] October 31, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 7]

[Figure 8]

[Figure 5]

[Figure 6]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a magnetic head according to the present invention.

FIG. 2 is an enlarged plan view of a gap portion of the magnetic head of FIG.

3A to 3C are process diagrams sequentially showing a manufacturing process of the magnetic head of FIG.

4A to 4C are process diagrams sequentially showing a manufacturing process of the magnetic head of FIG.

5A to 5C are process diagrams sequentially showing a manufacturing process of the magnetic head of FIG.

FIG. 6 is a schematic perspective view showing an example of a conventional magnetic head.

7 is an enlarged cross-sectional view of the gap portion of the magnetic head of FIG. 6 after polishing.

FIG. 8 is an enlarged cross-sectional view of the gap portion of the magnetic head of FIG. 6 after joining.

[Explanation of reference numerals] 10 magnetic head 11,12 core half body 12a, 13a, 21 magnetic substance substrate 12b, 13b, 22 magnetic substance film 13, 14 abutting surface 13c, 14d gap forming portion 13b, 14b rear joint portion 13e groove portion 15 , 16 Metal magnetic film 17 Gap part 20 Substrate 23 Glass 24 Winding groove 25 Reinforcing groove 26, 29 Bonding glass 27 Track groove 28 Magnetic thin film 30 Gap material 31 Core half block

Claims (1)

[Scope of utility model registration request] 1. A gap portion is formed by abutting a pair of core halves made of a plurality of magnetic films laminated on a non-magnetic substrate so that the magnetic films extend perpendicularly to the gap. In the area of the abutting surface of each core half in the magnetic head, the non-magnetic substrate part is removed from the core half, leaving the magnetic film, and A magnetic head, wherein the gap forming portion is provided with a magnetic film parallel to the gap portion.