JPS62279507A - Production of magnetic head - Google Patents

Abstract

PURPOSE:To improve the capacity of a magnetic head by welding respective gap forming faces of two composite blocks, where a nonmagnetic material layer and a magnetic material layer are alternately laminated, to each other and forming gaps so that the extension of one gap is put on the other gap. CONSTITUTION:The first winding groove 19 is formed on the gap forming face of the composite block where a nonmagnetic material layer 15 and a magnetic material layer 16 are alternately laminated, and the second winding groove 20 is formed on the gap forming face of the composite block so that this groove 20 is orthogonal to the first winding groove 19, thus producing a grooved block 22. Gap forming faces of two grooved blocks 22 are welded to each other to produce a welded block 23, and this block is cut to produce a head chip 26. Windings are inserted through the first and second winding holes 24 and 25. By this production, the capacity of the magnetic head is improved and the man-hour for production is reduced to reduce the cost.

Description

[Detailed description of the invention]

3. Detailed Description of the Invention [Field of Industrial Application] The present invention is used in a magnetic disk system that records one frame into two fields, and reproduces the two fields continuously to obtain a clear still image. The present invention relates to a method of manufacturing a magnetic head required for. [Prior Art] This type of conventional magnetic head has two gaps, and is usually manufactured by the manufacturing process shown in FIGS. 6 to 10 below. For example, as shown in FIG. 6, two magnetic head chips I having one gap are used, and after winding a winding (not shown) around these magnetic head chips 1, a predetermined thickness is formed between the magnetic head chips 1. A method is known in which these two types are integrated by interposing a non-magnetic material 2 having substantially the same shape as the magnetic head chip 1. However, in the above method, it is difficult to control the adhesive layer that adheres the magnetic head chips 1 and the non-magnetic material 2 to a desired thickness, so the distance between the magnetic head chips 1 is kept constant. Therefore, the yield was low. In addition, since a process for joining the two magnetic head chips 1 is required, there is a problem in that the number of man-hours for manufacturing the magnetic head increases, leading to an increase in the cost of the magnetic head. Therefore, a method of manufacturing a magnetic head as shown in FIGS. 7 to 10 has been proposed. That is, first, as shown in FIG. 7, in a composite block 5 in which magnetic materials 4 and non-magnetic materials 3 are alternately formed, a groove extending from the front to the rear of the composite block 5 is formed. After forming the groove 6, the groove 6 is filled with glass to form a welding glass layer. Next, the two composite blocks 5 are welded by melting this welding glass layer to form a glass layer 9,
A welding block 7 is produced. Next, this welding block 7
is cut by the cutting parts 8, 8 to obtain the head chip 11 shown in FIG. Next, as shown in FIG. 10, a member 12 around which the coil 10 shown in FIG. will be produced. However, in such a magnetic head, the closed magnetic path is connected to the member 12.
Since the core is formed by adhering the core to the head chip 11, there is a problem that the efficiency of the core decreases.

[Purpose of the invention]

The present invention has been made in consideration of the above-mentioned conventional problems, and it is possible to manufacture a high-performance magnetic head by preventing a decrease in core efficiency, and to reduce the number of man-hours for manufacturing the magnetic head. The object of the present invention is to provide a method for manufacturing a magnetic head that can reduce the cost of the magnetic head by reducing the amount of the magnetic head. [Structure of the Invention] In order to achieve the above object, the method for manufacturing a magnetic head according to the present invention includes a first @ A wire groove is formed, and then a second winding groove is formed on the gap forming surface of the composite block so as to be perpendicular to the first winding groove to produce a groove forming block. Using two blocks, after bringing the gap forming surfaces of these groove forming blocks into close contact with each other, welding the groove forming blocks to each other to produce a welded block, and then cutting the welded block to produce a head chip, Thereafter, the winding is passed through a first winding hole formed between the first winding grooves and a second winding hole formed between the second winding grooves, and the winding is passed through the first winding hole of the head chip. The present invention is characterized in that a coil is provided on the side wall of the ceramic material layer on which the head chip is formed, so that there is no need to form the member provided with the coil separately from the head chip. [Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. As shown in FIGS. 4 and 5, two composite blocks 1
8 and 18 are welded so that these composite blocks 18 and 18 face each other. This composite block 18・
18 is composed of a non-magnetic material layer 15 having the same thickness as the guard band width, and two magnetic material layers 16 formed on both sides of this non-magnetic material layer 15,
A first winding socket 24 is formed on the side wall of the magnetic material layer 16 . Further, inside the magnetic head, the first winding hole 2 is provided.
A second @ wire hole 25 communicating with 4 is formed. A coil is wound around the side wall of the magnetic material layer 16 so as to pass through the second wire hole 25 and the first winding inlet 24, and a coil 17 is provided on the side wall of the magnetic material layer 16. . Similarly,
A coil 17 is also provided on the side wall of the other magnetic material layer 16. The magnetic head having the above structure is manufactured by processing in the following steps. First, as shown in FIG. 1, non-magnetic material layers 15 and magnetic material layers 16 having the same thickness as the guard band width of the recording pattern on the magnetic disk are alternately laminated to form a composite block 18. Next, a first winding groove 19 is formed in the gap forming surface of the composite block 18 along one longitudinal side of the composite block 18. Next, so as to be orthogonal to the first winding groove 19, the non-magnetic material layer 15 and the magnetic material layer 16 in the vicinity of the gear sop forming surface of the composite block 18 are provided with a groove so that the first winding a19 side is higher. A second winding groove 20 having an inclination is formed, and a groove forming block 22 is manufactured. Here, when forming the second winding groove 20, it is necessary to perform the work with care so as not to damage the track portion. Next, as shown in FIG. 3, after using two of the groove forming blocks 22 and bringing the gap forming surfaces of these groove forming blocks 22 into close contact with each other, the groove forming blocks 2
A welded block 23 is produced by welding the two together. After this,
Cutting along the cutting lines 21 and 21 produces a tip in which the non-magnetic material layer 15 is interposed between the magnetic material layers 16. As a result, a first winding groove 24 is formed between the first @ wire grooves 19 and 19, and a second winding groove 25 is formed between the second winding grooves 20 and 20. Next, as shown in FIG. 4 and FIG.
A coil 17 is passed through the winding inlet 24 and the second winding inlet 25 and wound around the side wall of one of the magnetic material layers 16 in which the first winding hole 24 is formed, and the coil 17 is wound on the side wall of one of the magnetic material layers 6. will be established. Similarly, a coil-F is provided on the side wall of the other magnetic material layer 16, thereby manufacturing a magnetic head. As mentioned above, the magnetic head is manufactured by using two composite blocks 18 in which non-magnetic material JW 15 and magnetic material layers 16 are alternately laminated, and by welding the gap-forming surfaces of these composite blocks 18 to each other. The extension line of one gear is formed so as to overlap the gap of the other gear. Thereby, the performance of the magnetic head can be improved. [Effects of the Invention] As described above, the method for manufacturing a magnetic head of the present invention includes forming the first winding groove in the gap forming surface of the composite block in which non-magnetic material layers and magnetic material layers are alternately laminated. Next, a second winding groove is formed on the gap forming surface of the composite block so as to be perpendicular to the first winding groove to produce a groove forming block, and then two of these groove forming blocks are used. , After the gap forming surfaces of these groove forming blocks are brought into close contact with each other,
Create a welded block by welding the groove forming blocks together,
Thereafter, the welding block is cut to produce a head chip, and then the winding is formed between a first winding hole formed between the first @ wire grooves and a first winding hole formed between the first @ wire grooves. In this configuration, a coil is provided on the side wall of the ceramic material layer in which the first winding hole of the head chip is formed, passing through the second winding hole. This eliminates the need to separately form a member provided with the coil. Therefore, the number of components of the magnetic head can be reduced, and the process of attaching a member provided with a coil to the magnetic head can be eliminated, so that the number of man-hours for manufacturing the magnetic head can be reduced. Therefore, it is possible to reduce the cost of the magnetic head. In addition, since a closed magnetic path is formed without attaching the member provided with the coil to the magnetic head, it is possible to prevent core efficiency from decreasing, making it possible to manufacture high-performance magnetic heads. This effect can be achieved.

[Brief explanation of the drawing]

1 to 5 are explanatory views showing the manufacturing process of the present invention, and FIGS. 6 and 7 to 10 are explanatory views showing the manufacturing process of a conventional magnetic head. 15 is a non-magnetic material layer, 16 is a magnetic material layer, 18 is a composite block, 19 is a first winding groove, 20 is a second winding groove, 22 is a groove forming block, 23 is a welding block, 24 is the first volume A wire hole, 25 is a second winding hole, and 26 is a head chip. Figure 6'$7 Figure 10

Claims (1)

[Claims] 1. Form a first winding groove on the gap forming surface of a composite block in which non-magnetic material layers and magnetic material layers are alternately laminated, and then insert the composite block so that it is perpendicular to the first winding groove. A groove forming block is produced by forming a second winding groove on the gap forming surface of the groove forming block, and then two of these groove forming blocks are used, and after the gap forming surfaces of these groove forming blocks are brought into close contact with each other, the groove forming blocks are is welded to produce a welded block, then the welded block is cut to produce a head chip, and then the winding is inserted into the first winding hole formed between the first winding grooves and the first winding groove. Manufacture of a magnetic head characterized in that a coil is provided on the side wall of both magnetic material layers in which the first winding hole of the head chip is formed, passing through a second winding hole formed by two winding grooves. Method.