JPS6284417A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To simplify steps by butting the blocks of a pair of core half bodies to form them in one body, obtaining a core block and cutting said block to obtain the core of a magnetic head. CONSTITUTION:A supporting substrate A is cut at the prescribed same intervals l1, l... and divided into plural materials B, B... for the core block in such a way that said substrate A can intersect orthogonally with the attachment surface of a thin film 1 made of a wear-resistant material and can be in parallel with a plane having an angle theta the same as an azimuth set to the magnetic clearance of the magnetic head with respect to one side (a). Then plural materials B, B... are laminated, which the thin film 4 made of a ferromagnetic material attaches to and is formed on. After they are again divided into materials B, B..., the attachment surface of the thin film 1 is arranged to obtain a laminated body C. Then it is cut at the prescribed interval L to obtain the blocks D, D... of the core half bodies, and a butting surface (c) is ground. A gap material attaches to the blocks D, D... to form them in one body, thereby obtaining the core block F. Thus a thin film magnetic head equipped with the prescribed azimuth in the magnetic clearance can be easily obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a magnetic head, particularly a magnetic head made of a thin film of a ferromagnetic material such that a predetermined azimuth angle is attached to a magnetic gap portion. This article relates to a method of manufacturing a magnetic head.

(Prior Art) With the progress of high-density recording of information 4F4h on magnetic recording media, recording and reproduction of information signals from magnetic recording media has become necessary as a result of the need to narrow the recording trace r11 (track "tl"). It is well known that magnetic heads used in the field have come to be required to have smaller tracks, and various types of magnetic heads with narrower tracks 111 have been proposed. In addition, as a means to realize the demand for high-density recording of information signals on magnetic recording media, we have developed two magnetic heads for recording and reproduction, in which the direction of the magnetic gap in the track is in the middle of the recording trace. By using a magnetic recording medium that is inclined by a minute angle (for example, 16 degrees) to ,
By preventing the information of adjacent recording traces from being reproduced due to so-called azimuth loss, the existence of non-recorded parts (guard bands) conventionally provided between adjacent recording traces is unnecessary.
Efforts have also been made to enable high-density recording on magnetic recording media.

(Problems to be Solved by the Invention) By the way, the magnetic heads that have been proposed in the past as a narrow magnetic head in a track include (1) the magnetic head currently widely used as a magnetic head for vTR; (2) A magnetic head in which the track near the magnetic gap is narrowed by cutting and removing the part on the magnetic gap side of the abutting surfaces of two bulk magnetic core halves. A magnetic head in which the thickness of a thin plate of magnetic material itself or the thickness of a thin film of ferromagnetic material is in the track of the magnetic head (3
) A typical example is a magnetic head in which the magnetic core, coil, insulating layer, etc. are constructed by applying film-forming technology, such as those used in floating-L type magnetic heads.

(Problem to be Solved by the Invention) However, in the conventional magnetic head having the configuration shown in (1), the inside of the track of the magnetic head is determined by machining, so the inside of the track is about 20 microns. The track width is processed for each magnetic head, which takes time to produce, and if the material used for the magnetic core has a high saturation magnetic flux density, There are problems such as the fact that there is currently no known material that can be machined in a manner similar to that used for ferrite. In order to track the magnetic head using a thin plate or film of ferromagnetic material itself, the thin plate or film of ferromagnetic material is sandwiched between wear-resistant supports from both sides and supported. Furthermore, the conventional magnetic head having the configuration shown in (3) has the problem that a predetermined minute tracking width is formed on the substrate by, for example, lithography. Although it is possible to easily make a magnetic head with a magnetic core formed from a pattern of ferromagnetic material having Therefore, there are problems such as low efficiency of the magnetic core, easy saturation of the magnetic core, and inability to increase the number of turns of the coil. There is a problem in that the process becomes complicated in order to configure a predetermined azimuth angle.

(Means for Solving the Problems) The present invention provides a thin layer of wear-resistant material on a support substrate, such as a thin layer of wear-resistant material attached to a surface to be a sliding surface of a magnetic head. perpendicular to the layer attachment surface, and
The substrate is cut at predetermined equal intervals parallel to a plane having an angle equal to the azimuth angle to be set in the magnetic gap of the magnetic head with respect to one side of the planar shape of the attachment surface to form core blocks. The process of obtaining the raw material, and after laminating the core block materials obtained in the above process by rotating them by 90 degrees in a certain direction, the surface to which the thin layer of the wear-resistant material is applied is laminated. A step of depositing a thin film of ferromagnetic material on a surface perpendicular to A step of laminating the layers so that the surfaces thereof are on the same plane, and adhering the surfaces perpendicular to the surfaces to which the thin film of the wear-resistant material is attached to each other to obtain a laminate; cutting the produced laminate at predetermined equal intervals adjacent to the surface to which the wear-resistant material is attached and parallel to the side surface existing in the lamination direction to obtain blocks of core halves; A step of forming grooves for coil winding in each pair of core half blocks by forming a pair of core half blocks in each of the multiple core half blocks produced by the above-mentioned process; a step of polishing the abutting surfaces of the body block and attaching a gap material to the surfaces;
To provide a method for manufacturing a magnetic head, which comprises the steps of: obtaining a core block by butting and integrating the pairs of core half blocks described above; and obtaining a core of a magnetic head by cutting the core blocks into the core blocks. It is.

(Example) Hereinafter, specific details of the method for manufacturing a magnetic head of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 shows wear-resistant material on the surface that is to be the sliding surface of the magnetic head.
A supporting substrate A, for example on which a thin layer 1 of glass is attached.
2 is a perspective view of the support substrate A, and 2 is the main body portion of the support substrate A. As the main body portion 2 of the support substrate A, for example, a ferrite plate is used.

The support substrate A shown in FIG. A predetermined equal interval Q, 1 parallel to a plane having an angle θ equal to the azimuth angle θ to be set in the gap g (see FIG. 8).
1. By cutting at ..., it is divided into a plurality of core block materials B, B, and so on.

Straight line 3 indicated by numerals 3, 3... in Figure 1
, 3 . . . are lines for indicating cutting locations of the support substrate A. The cords B, B, etc. of the plurality of core blocks obtained by cutting the support substrate A as described above are laminated as shown in Fig. 2 with them rotated by 90 degrees in a certain direction. Then, in the laminated state shown in FIG. 2, arrows X, X, For example, by applying the sputtering method from the direction indicated by...
A thin film 4 (see FIG. 4) of ferromagnetic material is deposited.

The core block with the thin fl14 of ferromagnetic material adhered thereto as shown in the fourth figure is divided into the cords B, B, etc. of each core block again through the above process, and then the wear resistance of the cables B, B, etc. The adhesive surfaces of the thin films 1 of wear-resistant materials are aligned on the same plane, and the surfaces perpendicular to the surfaces to which the thin films 1 of wear-resistant materials are adhered to each other are stacked as shown in FIG. A laminate C is obtained. Material B of each core block carried out in the step of obtaining the laminate C,
The fixing between H... is performed using, for example, glass welding or an adhesive.

Next, the laminate C made in the above process is placed at predetermined equal intervals 1. The core is cut into half core blocks D, n, . . . as shown in FIG. Fourth
The position indicated by the dotted line in the figure is the cutting position in the laminate C.

Two each of the many core half blocks D, D, etc. produced by the above process are cut into pairs of core half blocks D, D, and subjected to cutting. This forms a groove E for winding the coil (see Fig. 6).

Next, the abutting surfaces C of the blocks D, D, etc. of each of the core halves described above are polished, and a gap material is attached to that surface, and then the blocks D of the pair of core halves described above,
A core block F is obtained by butting D together and integrating them as shown in the seventh figure.

By cutting the core block F shown in No. 7riA at the positions indicated by dotted lines in FIG. 7, the cores of individual magnetic heads can be obtained. After polishing the sliding surface of the core of each magnetic head obtained as described above,
A magnetic helad is obtained by winding a coil.

FIG. 8 is a plan view of the sliding surface of the magnetic head manufactured according to the manufacturing method of the magnetic head of the present invention, and as shown in FIG. The head has an azimuth angle of angle θ attached to its magnetic gap g.

(Effects) As is clear from the above detailed explanation, the manufacturing method of the magnetic head of the present invention is such that a thin layer of wear-resistant material is attached to the surface that is to be the sliding surface of the magnetic head. An angle that is perpendicular to the surface to which the thin layer of wear-resistant material is attached on the support substrate, and that is equal to the azimuth angle to be set in the magnetic gap of the magnetic head, with respect to one side of the planar shape of the surface to be attached. A step of cutting the substrate described above at predetermined equal intervals in parallel to a plane having
a step of stacking them with each of them rotated by 90 degrees in a fixed direction, and then depositing a thin film of ferromagnetic material on a surface perpendicular to the surface to which the thin layer of wear-resistant material is attached; The materials of each core block on which the thin film of ferromagnetic material has been deposited are made so that the surfaces on which the thin film of the wear-resistant material is attached are on the same plane, and obtaining a laminate by adhering them to each other on surfaces perpendicular to the attachment surfaces of the thin films; placing the laminate produced in the above step adjacent to the attachment surface of the wear-resistant material; and a step of cutting parallel to the side surfaces existing in the stacking direction at predetermined equal intervals to obtain core half blocks, and a step of cutting each of the many core half blocks made by the above steps into two pieces. , a step of forming grooves for coil winding in each pair of core half blocks, and polishing the abutting surfaces of each of the core half blocks described above, and adhering a gap material to the surfaces. The process consists of a process, a process of butting and integrating the pairs of core half blocks to obtain a core block, and a process of cutting the core block to obtain the core of the magnetic head. According to the manufacturing method of the magnetic head of the invention, the magnetic gap g formed on the sliding surface of the magnetic head is made of thin films 4, 4 made of ferromagnetic material that extend in a direction parallel to the sliding direction of the magnetic tape. It is possible to easily obtain a magnetic head that is formed in a magnetic head, so that the amount of uneven wear that occurs on the thin film made of ferromagnetic material due to the use of the magnetic head is proportional to the direction in which the magnetic tape slides. Compared to the case where the thin films 4, 4 made of ferromagnetic material are provided so as to extend in non-parallel directions, uneven wear occurs in the thin films 4, 4 made of ferromagnetic material due to the use of the magnetic head. This makes it possible to easily provide a magnetic head with less deterioration of characteristics due to use.Furthermore, in the present invention, the thin layer 1 of the wear-resistant material is formed on the surface that is to be the sliding surface of the magnetic head. The magnetic gap g of the magnetic head is set perpendicular to the adhering surface of the thin layer of the wear-resistant material on the supporting substrate A on which the thin layer of the wear-resistant material is attached, and with respect to one side of the planar shape of the adhering surface. Since the core block material is made by cutting the above-mentioned substrate at a predetermined equal interval Ω parallel to a plane having an angle θ equal to the azimuth angle to be Thin film magnetic head with angle θ can be easily manufactured6

[Brief explanation of drawings]

1 to 7 are diagrams for explaining the manufacturing process of the magnetic head manufacturing method of the present invention, and FIG. 8 is a plane view of the sliding surface of the magnetic head manufactured according to the magnetic head manufacturing method of the present invention. It is a diagram. A...Support substrate, 1...Thin layer of wear-resistant material 1.2
...Main part of support substrate, g...Magnetic gap, θ...
Azimuth angle, B...Core block material B, B
, 3, 3... Straight line 3... A line for indicating the cutting location of the support substrate A, 4... Thin film of ferromagnetic material, C... Laminated body, D... Core half block, b.
...Side surface existing in the stacking direction of the laminate, E...Groove for coil winding, C...Abutment surface c in blocks D and D of each core half, F...Core block F ,

Claims (1)

[Claims] The surface to which the thin layer of wear-resistant material is attached is perpendicular to the surface to which the thin layer of wear-resistant material is attached, and the surface to which the thin layer of wear-resistant material is attached. A step of cutting the substrate at predetermined equal intervals parallel to a plane having an angle equal to the azimuth angle to be set in the magnetic gap of the magnetic head with respect to one side of the planar shape of the magnetic head to obtain a material for the core block. Then, after laminating the core block materials obtained in the above steps by rotating them by 90 degrees in a certain direction, A step of depositing a thin film of ferromagnetic material on the core block, and a step of depositing a thin film of ferromagnetic material on each core block material on which a thin film of ferromagnetic material has been deposited in the above step, so that the surfaces on which the thin film of wear-resistant material is attached are on the same plane. a step of stacking them so that the surfaces perpendicular to the surfaces to which the thin film of the wear-resistant material is attached are fixed to each other to obtain a laminate, and a laminate made by the above step. a step of cutting the core half block at predetermined equal intervals adjacent to the surface to which the wear-resistant material is attached and parallel to the side surface existing in the stacking direction; Two of each of the large number of core half blocks are each used as a pair of core half blocks,
A step of forming a groove for coil winding in the core half block, a step of polishing the abutting surfaces of the blocks of each of the core halves described above, and a step of attaching a gap material to that surface; A method for manufacturing a magnetic head, which includes a step of butting and integrating blocks to obtain a core block, and a step of cutting the core block to obtain a core of the magnetic head.