JPH02118910A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To eliminate the deviation of the center of an erase track by cutting a track groove after a preceding erase core and a recording/reproducing core are bonded incorporatedly so as to form an erasure track and a recording and reproducing track simultaneously. CONSTITUTION:A nonmagnetic SiO2 thin film being an R/W gap spacer is formed by sputtering to a bonded face of a ferromagnetic ferrite core 1 having a winding groove 5 with cutting with respect to a flat core (ferrite) 3, and nonmagnetic SiO2 thin film being an erasure gap spacer is formed by a method such as ion plating to a bonded face of a core 2 having a winding slot 5 with cutting with respect to a flat core half 4 similarly. Then the members are butted and heated and bonded by glasses 8, 9 to integrate them thereby obtaining a magnetic head core block 10. Then a track groove 12 is formed to the apex 11 of a block 10 with cutting so as to form a prescribed size to the erasure track and the R/W track respectively, a glass 13 whose melting point is lower than that of the glass bonded and integrated to a track slot, the apex end is ground to form a prescribed gap depth (d) and slicing is applied as shown in chain lines l.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a magnetic hennode for high-density perpendicular magnetic recording, and more particularly to a method of manufacturing a leading wide erase type magnetic hennode suitable for barium ferrite media.

]←Pd1 Original 2 Review Vol. 40 No. 13 (published on 12/1/985)
As disclosed in P and IIIG, track [1] has a narrow gap corresponding to high-density recording, and the erase-only gap ( A leading wide erase head in which an erase gap (erase gap) is placed in a position preceding a recording/reproducing gap (R/W gear, p) is used for barium ferrite perpendicular recording media.

A method of manufacturing this advance wide erase head will be explained with reference to the drawings.

As shown in FIG. 4, first, in the same manner as the normal magnetic head, the erase core block 15 and the R/W core block 16 are machined with trunk grooves 17 so that they each have a predetermined track [1], and then a predetermined gear A non-magnetic gap spacer 18 is formed on the bonding surface so as to have a long length, and the glasses 19 are heated to melt the glass 19, and are bonded and integrated.

After that, the erase core block 15 and the R/W-ff block 16 are polished and butted together so that the erase core block 15 and the R/W-ff block 16 have a predetermined gear spacing, and then heated again and bonded with the center glass 20 having a lower melting point than the gap forming glass. They are integrated and the top end is polished to a predetermined gap depth d.

Next, slice this block along the chain lines, J, J,... to obtain magnetic henotchi.

Thereafter, a thin wire is wound around each core to form a magnetic head, but since this step is a common method, a description thereof will be omitted.

As explained above, in the conventional method, the erase core block and the R/W core block are created separately and then butted and integrated. As a result of poor alignment accuracy, many defects were occurring due to misalignment of the erase track and R/W rack.

Furthermore, since the distance between the erase gap and the R/W gap is an area where recording and reproduction cannot be performed, it is desirable that it be as small as possible (200 μm in the disclosed example).
The thickness of the half core corresponding to the joint between the erase core and the R/W core cannot be made thinner from the viewpoint of strength, so it is necessary to reduce the thickness by polishing after processing the core block before joining.

In order to solve the above-mentioned problems, the present invention uses a flat core with no track grooves formed to form an erase core and R.
After the /W core is joined and integrated, the trunk groove is processed to form the erase trunk and the R/W track at the same time.

1. As described above, in the present invention, the erase core and the R/W core are created using a flat core half-shaped without track grooves processed, and after joining and integrating them, the track grooves are processed. /W Trunk center shift does not occur.

Furthermore, since the core half-hole corresponding to the joint between the erase core and the R/W core is also flat, thin material can be used from the beginning, and gear knobs with narrow spacing can be easily manufactured.

EMBODIMENT OF THE INVENTION An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

As shown in Fig. 2, a flat core (ferrite) of a ferromagnetic core (ferrite) 1 with winding and wire grooves 5 cut out.
A non-magnetic thin film (S i 02 ) 6, which will become a R/W gap spacer, is formed at the junction with 3 to a thickness of 0.3 to 0.5 μm by sputtering or the like. Similarly, a non-magnetic thin film (Si02) 7 which becomes an erase gear and a bus baser is placed at the joint part between the flat core 1' and the body (ferrite) 4 of the ferromagnetic core (ferrite) 2 with the winding groove 5 machined. is formed to a thickness of 1 to 2 μrri by ion blating or the like.

Next, the above-mentioned members are butted together and heated, and each is joined with glass 8°9 to integrate them to obtain Tococoa Pro 10.

Thereafter, as shown in FIG. 3, the erase trunk, R
/W track grooves 12 are formed so that each track has a predetermined size.

Next, a glass 13 having a lower melting point than the bonded and integrated glass is molded into this track groove portion, and the top end portion 11 is polished to a predetermined gap depth d.

Thereafter, it is sliced along the dashed lines /, , &, . . . to obtain the magnetic strips 14 shown in FIG.

``Light''■ 辷联附As explained above, in the present invention, the erase core and R/W
After the cores are integrally joined, the track grooves are machined to form the erase track and the R/W track at the same time, so there is no center shift of the erase track, and the gap interval is narrow because the core is half-circumcised in the form of a flat plate. can also be easily manufactured.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a magnetic core chip that is an embodiment of the present invention, Fig. 2 is a perspective view of a magnetic core block that is an embodiment of the present invention after being integrated and joined, and Fig. 3 is a perspective view of a magnetic core chip that is an embodiment of the present invention. FIG. 4 is a perspective view of the track groove side of the magnetic core blower according to the embodiment of the present invention after the Nigarasu molding is performed, and FIG. 4 is a schematic diagram illustrating a conventional example. 1.3... Strong magnetic material for R/W core, 4...
...Ferromagnetic material for erase core, 5...Winding groove, 6...R/W gap spacer nonmagnetic thin film, 7
...Erase gap spacer non-magnetic thin film, 8
．． 9... Bonding glass, 10... Magnetic head core block, 11...
... Top end portion, 12 ... Track groove, 13 ... Low melting point glass for mold, 14 ...
...magnetic hesodocoatinop. −111111koψ

Claims (1)

[Claims] In the manufacture of advanced wide erase magnetic heads in which the erase gap is placed in a position preceding the recording/reproducing gap, the preceding erase core and the recording/reproducing core are bonded and integrated, and then track grooves are cut to form the erase track and the recording/reproducing track. A method of manufacturing a magnetic head, characterized by simultaneously forming a magnetic head.