JP2639239B2 - Manufacturing method of magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a magnetic head having a pair of read / write core chips corresponding to different recording densities.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing a conventional method of manufacturing a magnetic head, FIG. 4 is a perspective view showing a state after assembling the magnetic head, and FIG. 5 is a plan view of the magnetic head after assembling. In the figure, 1a is a read / write for recording / reproducing a signal.
The write core chip 1b is a read / write core chip for recording / reproducing a signal at a different recording density from the read / write core chip 1a. Numeral 2 is a spacer made of a non-magnetic material such as ceramics provided between the read / write core chip 1b and the read / write core chip 1a to prevent magnetic interference between the two core chips. Is a holder made of a non-magnetic material such as ceramics for holding the read / write core chips 1a and 1b from both sides to stabilize the contact with the recording medium. 4a is a read / write gap provided in the read / write core chip 1a, and 4b is a read / write core chip 1a.
b, the read / write gap 4b is arranged on the same straight line perpendicular to the read / write gap 4a and the rotation direction of the recording medium.

Next, a manufacturing method will be described. Lead
The holder 3a and the read / write gap are arranged so that the write gap 4a and the read / write gap 4b are arranged on the same straight line.
The write core chip 1a, the spacer 2, the read / write core chip 1b and the holder 3b are fixed by a jig,
The above five parts are joined by glass or resin.

[0004]

The conventional magnetic head is
Since it is manufactured by the above method, five parts are bonded at the same time, and the position of the two read / write gaps 4a and 4b during the bonding because four bonding layers are present in one bonding process. However, there is a problem that it is easily shifted.

The present invention has been made to solve the above problems, and has as its object to provide a method of manufacturing a magnetic head in which the positions of two read / write gaps are accurately adjusted.

[0006]

In order to achieve the above object, a method of manufacturing a magnetic head according to the present invention comprises the steps of: recording a signal on a flexible disk-shaped magnetic recording medium on both surfaces of a spacer made of a non-magnetic material; A pair of read / write core chips corresponding to different recording densities to be reproduced are bonded,
Further, in manufacturing a magnetic head having a pair of holders made of a non-magnetic material bonded to both sides thereof,
In the first step, three adjacent parts are bonded and fixed in a correct relational position using a bonding glass, and in the second step, this and the remaining two parts are bonded and fixed in a correct relational position using a bonding resin. Things.

[0007]

According to the magnetic head manufacturing method of the present invention,
Rather than joining and bonding the five parts at the same time, in the first step the three parts are bonded and fixed in the correct relationship using the bonding glass, and in the second step this and the remaining two parts are bonded using the bonding resin. Since the three parts in the first step bonded at a high temperature using the bonding glass that does not soften at the resin bonding processing temperature are treated as single members, the three parts are also fixed in the second step. It is only necessary to perform the alignment and the bonding. Therefore, since there are two layers to be bonded, there is little displacement at the time of bonding, and the positioning and fixing of the read / write gap can be easily performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a method for manufacturing a magnetic head according to the present invention. In the figure, reference numeral 1a denotes a read / write core chip for recording / reproducing a signal, and 1b denotes a read / write core chip for recording / reproducing a signal at a recording density different from that of the read / write core chip 1a. Numeral 2 is a spacer provided between the read / write core chips 1a and 1b to prevent magnetic interference between the two core chips, and is formed of a nonmagnetic material such as ceramics. Reference numerals 3a and 3b denote holders provided to hold the read / write core chips 1a and 1b from both sides and to stabilize contact with a recording medium, and are formed of a nonmagnetic material such as ceramics. 4a is a read / write device provided on the read / write core chip 1a.
Write gaps 4b are read / write gaps provided in the read / write core chip 1b, and are arranged on the same straight line perpendicular to the read / write gap 4a and the rotation direction of the recording medium as shown in FIG. Have been.

In order to manufacture the magnetic head, in the first step, the holder 3a, the read / write core chip 1a and the spacer 2 are bonded together with a bonding glass interposed therebetween, fixed by a jig (not shown), and bonded at a high temperature. . At this time, it is not necessary to exactly align the three parts. Next, the second
In the process, this holder 3a, read / write core chip 1
The read / write core chip 1b and the holder 3b are joined to each other with an adhesive resin such that the read / write gap 4a and the read / write gap 4b are arranged on the same straight line on the adhesive body of the spacer a and the spacer 2. Fix with a jig that does not work, and bond at a processing temperature lower than the softening temperature of glass. In the second step, since the holder 3a, the read / write core chip 1a, and the spacer 2 are already bonded at a high temperature by the bonding glass, they are treated as a single member without displacement at the bonding temperature of the resin. Also in the second step, three members are joined and bonded. Therefore, since the number of layers to be bonded is two, there is little displacement at the time of bonding, and the positioning and fixing of the read / write gaps 4a and 4b are easily performed.

FIG. 2 shows another embodiment of the present invention. The components of the magnetic head are the same as those shown in FIG. In the first step, the read / write core chip 1a,
The spacer 2 and the read / write core chip 1b are fixed using a jig (not shown) with an adhesive glass therebetween so that the read / write gaps 4a and 4b are arranged on the same straight line, and are joined at a high temperature. Adhere. In the second step, the holders 3a and 3b are bonded to the bonded body of the read / write core chip 1a, the spacer 2 and the read / write core chip 1b with a bonding resin interposed therebetween, and bonded at a low temperature. In the second step, read / write core chip 1
Since the a, the spacer 2 and the read / write core chip 1b are already bonded by the bonding glass, they can be treated as a single member without displacement at the bonding temperature of the resin, so that the three members can be joined and bonded even in the second step. Becomes
Therefore, there are only two layers to be bonded, so there is little shift during bonding,
The positioning and fixing of the read / write gaps 4a and 4b are easily performed.

[0011] As the bonding glass, a ferrite fusing glass is usually used, and a fusing treatment is performed at 740 ° C. Epoxy resin is usually used as the adhesive resin,
Heat softening at ℃. The present invention is characterized in that the bonding glass is used in the first step and the bonding resin is used in the second step. That is, while the bonding with glass is performed at a high temperature, the bonding with the resin is performed at a lower temperature than in the case of glass, so that there is no risk that the bonded parts in the first step will shift in the second step. If the bonding glass or the bonding resin is used in both the first step and the second step, when reheating in the second step, the three parts bonded in the first step may be loosened and cause a positional shift. Therefore, many man-hours are required for alignment, and it is difficult to ensure perfection.

[0012]

As described above, according to the present invention, of the five parts constituting the magnetic head, three parts adjacent to each other are bonded and fixed at the correct positions using the bonding glass in the first step. In the process, this and the remaining two parts are bonded and fixed at the correct positions by using an adhesive resin.
The first and second steps are performed because the members bonded in the process do not shift.
In this process, three members are joined together, and unlike the case where five components are combined and bonded at the same time, there is an effect that accurate positioning and fixing of the read / write gap can be easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a method of manufacturing a magnetic head according to an embodiment of the present invention.

FIG. 2 is an illustration of a method of manufacturing a magnetic head according to another embodiment of the present invention.

FIG. 3 is an explanatory view of a conventional method for manufacturing a magnetic head.

FIG. 4 is a perspective view showing a state after the magnetic head is assembled.

FIG. 5 is a plan view after assembling the magnetic head.

[Explanation of symbols]

 1a, 1b read / write core chip 2 spacer 3a, 3b holder

Claims (1)

(57) [Claims] 1. A pair of read / write core chips respectively corresponding to different recording densities for recording and reproducing signals on a flexible disk-shaped magnetic recording medium are bonded to both surfaces of a spacer made of a non-magnetic material. In manufacturing a magnetic head in which a pair of holders made of a non-magnetic material are bonded on both sides, in the first step, among the above five parts, three adjacent parts are bonded and fixed at the correct positions using bonding glass. And a second step of bonding and fixing the remaining two parts to a correct relational position using a bonding resin in a second step.