JPH01245476A - Production of magnetic head device - Google Patents

Abstract

PURPOSE:To eliminate the ringing of a head by coating a damping member on the surface of a gimbal by a screen printing method, forming and preventing the generation of the peak of an oscillation in the characteristic frequency of the gimbal. CONSTITUTION:A magnetic head device mounts magnetic head parts 3, 4 on a carriage part or an arm part as a supporting member through the gimbals 7, 8, and the damping member 21 is coated and formed on the surface of the gimbals 7, 8 according to the screen printing method. Accordingly, the generation of the peak of the oscillation in the characteristic frequency of the gimbal is prevented. Thereby, a stick slip is generated between the magnetic head parts 3, 4 and the recording face of a magnetic disk to slightly oscillate the magnetic head parts, attenuate the oscillation even with the resonance of the characteristic frequency of the gimbal and generate no ringing in the head.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of manufacturing a magnetic head device used in a floppy disk drive or the like, and particularly to a method of manufacturing a gimbal that supports a magnetic head section.

[Summary of the invention]

In the manufacturing method of a magnetic head device, the surface of the gimbal that supports the magnetic head is coated with damping material using a screen printing method to prevent vibrations caused by resonance of the magnetic head, called head noise. To provide a magnetic head device with uniformity and improved mass productivity.

[Conventional technology]

Magnetic disk drive devices that record and reproduce information signals on disk-shaped magnetic recording media such as floppy disks are easy to handle and can record large amounts of signals, so they are widely used as external storage devices for computers, word processors, etc. ing.

By the way, when recording and reproducing information signals on this magnetic disk, it is important to maintain constant contact between the recording surface of the magnetic disk and the magnetic head without spacing.
For this reason, various efforts have been made.

For example, in a magnetic head device installed in a double-sided magnetic disk drive that records and reproduces information signals on both sides of a magnetic disk,
The magnetic head sections arranged on the and side 1 are supported via an elastic metal plate to which the magnetic head section, called a gimbal, is attached, which is movable in the thickness direction, circumferential direction, or radial direction of the magnetic disk. It is attached to a member (the side 0 side is called the carriage part and the side l side is called the arm part). Thereby, the contact between the recording surface of the magnetic disk and these magnetic head portions can be maintained constant without any spacing, with good followability.

Note that on the side 0 side, the above-mentioned gimbal may not be used, and the magnetic head section may be attached to the support member via a highly rigid metal plate called a base plate.

[Problem to be solved by the invention]

By the way, in such a magnetic head device, since the magnetic head part slides closely against the recording surface of the magnetic disk, when the magnetic disk is running, the magnetic head part and the recording surface of the magnetic disk are momentarily caused by friction. It sticks to the surface, and then separates when the rotational force exceeds the frictional force. That is, a phenomenon of intermittent contact in which the magnetic head sticks to and separates from the recording surface of the magnetic disk, so-called stick-slip, occurs. In conventional magnetic head devices, the gimbal is made of a thin metal plate, so the stick-slip vibration of the magnetic head resonates with the gimbal's natural frequency, resulting in head noise, which is a phenomenon in which abnormal noise is generated. There has occurred.

The present invention has been made in view of the above points, and an object of the present invention is to provide a homogeneous magnetic head device that can prevent head noise and improve mass productivity.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a method for manufacturing a magnetic head device in which a magnetic head section is attached to a carriage section or an arm section as a supporting member via a gimbal, in which a damping material is attached to the surface of the gimbal. It is formed by coating it using a screen printing method.

[Function] By coating the surface of the gimbal with a damping material by screen printing in this manner, generation of a vibration peak at the natural frequency of the gimbal is prevented. For this reason, stick-slip occurs between the magnetic head section and the recording surface of the magnetic disk, causing the magnetic head section to vibrate slightly, and even if it resonates with the natural frequency of the gimbal, the vibration is attenuated, resulting in head noise. It never happens.

Furthermore, with the manufacturing method of the present invention, the damping material of the gimbal can be coated in large quantities onto each etching plate using the screen printing method, which provides a magnetic head device that is homogeneous and has excellent mass productivity, and is also inexpensive. can do.

〔Example〕

Hereinafter, a magnetic head device manufactured according to the present invention and a method of manufacturing the same will be explained with reference to FIGS. 1 to 5.

The present invention is a method of manufacturing a magnetic head device, characterized in that a magnetic head section is attached to a support member via a gimbal, and a damping material is coated on the surface of the gimbal by a screen printing method.

First, a magnetic head device manufactured by the manufacturing method of the present invention,
An example of application to a double-sided floppy disk drive will be described with reference to FIG.

This magnetic head device includes a carriage portion 1 which is fixed to a guide bar (not shown) or the like of a floppy disk drive main body and moves in the radial direction of the magnetic disk 5 along the guide bar by a step motor (not shown). The side 0 magnetic head section 3 attached to the distal end side of the carriage section l, and the hinge section 9 and coil spring 6 provided at the proximal end side so as to be rotatable in the direction of arrow A in FIG. It is composed of an arm part 2 fixed to the carriage part l, and a side 1 magnetic head part 4 attached to the tip side of the arm part 2 and facing the side 0 magnetic head part 3 with the magnetic disk 5 interposed therebetween. There is.

Then, recording is performed on both sides of the magnetic disk 5 by the side 0 magnetic head section 3 and the side 1 magnetic head section 4 mounted on the carriage section l and the arm section 2, respectively.
It is configured to perform playback.

Here, as the side 0 magnetic head section 3 and the side 1 magnetic head section 4, for example, a tunnel erase type magnetic head section as shown in FIG. 2 is used. This figure shows the surface in contact with the recording surface of a magnetic disk.The core 12 made of ferrite has a read/write gap 13 and an erase gap 14 on both rear sides of the core 12. The interval between data is ensured. A slider portion 15 made of ceramics or the like is further laminated on the core 12 to ensure a sliding contact area with the recording surface of the magnetic disk.

Further, in this magnetic head device, the magnetic head section 3.4 is connected to a carriage section 1 as a support member via a gimbal 7.8.
Alternatively, it may be attached to the arm portion 2.

However, on the side 0 side, instead of a gimbal, a flat metal plate called a base plate, which is more rigid than a gimbal, may be used. Various shapes have been proposed as the shape of this gimbal 7.8, but for boat fishing, an approximately U-shaped inner notch 8a and an outer notch 8b are respectively shown in Fig. 3. Those installed so as to face each other are used. In this case, connecting portions 9a are left between the inner notches 8a, and connecting portions 9b are left between the outer notches 8b. Then, an elastic spring portion 11 having high elasticity is formed at a location surrounded by the inner notch 8a and the outer notch 8b. In addition, the magnetic head section 3
．． 4 is fixed to a mounting table 10 surrounded by the inner notch 8a with epoxy adhesive or the like. By being fixed in this manner, the magnetic head portions 3.4 are movable in the thickness direction, circumferential direction, or radial direction of the magnetic disk 5, and are connected to the recording surface of the magnetic disk 5 and these magnetic head portions 3.4.
The contact of 4 has good tracking and can be kept constant without spacing. Furthermore, as shown in FIG. 4, a damping material 2 is provided on the surface of the gimbal 7.8.
1 is coated by screen printing method. The damping material 21 is not coachibed on the entire surface of the gimbal, but rather on the inner connecting part 9 of the gimbal 7.8.
a, the elastic spring portion 11 surrounded by the inner notch 8a and the outer notch 8b, and the outer connecting portion 9b;
is coated with the damping material 21. This coated portion is the most elastic part of the gimbal 7.8. Further, the gimbal 7.8 is a metal plate, and the metal plate may be a stainless steel plate, a beryllium copper plate, a permalloy plate, or the like. On the other hand, as the damping material 21, synthetic rubber, silicone rubber, and flexible resins such as epoxy and acrylic resins can be used.

Further, as the damping material 21, a material obtained by kneading a foaming agent into synthetic rubber can be used, and the damping effect is increased by later heating and expanding the material.

The manufacturing method for this gimbal 7.8 is shown in Figure 5 (A).
As shown in FIG. 1, first, a coatable silk screen 41 is prepared in which a large number of the damping materials 21 are arranged vertically and horizontally. This silk screen 41 is attached to a metal plate 31.
put on top. A material 32 of the damping material 21, such as silicone rubber, is poured onto the silk screen 41, and the roller 42 is rotated so that the material 32 of the damping material 21 is evenly coated.

When the silk screen 41 is removed, an etching plate 33 is obtained in which a metal plate 31 is coated with a large number of damping materials 21 vertically and horizontally as shown in FIG. 3B. This etching plate 33 is etched in the shape of the gimbal 7.8 to obtain the gimbal 7.8 on which the damping material 21 is printed. The gimbal 7.8 coated with this damping material 21 is assembled into a magnetic head device as shown in FIG.

Although an example of the method for manufacturing a magnetic head device according to the present invention has been described above, the present invention is not limited to the above-mentioned example, and can be applied in various ways without departing from the spirit of the present invention. Not even.

For example, so far we have explained an example in which one side of the gimbal is coated with damping material, but it goes without saying that the same effect can be obtained by coating both sides of the gimbal.

〔Effect of the invention〕

As is clear from the above description, the magnetic head device manufactured by the manufacturing method of the present invention has a gimbal that supports the magnetic head by coating the surface of the gimbal with damping material using a screen printing method. prevent the occurrence of vibration peaks at the natural frequency of the For this reason, stick-slip occurs between the magnetic head section and the recording surface of the magnetic disk, causing slight vibrations in the magnetic head section, and even if it resonates with the natural frequency of the gimbal, the vibration is attenuated, causing head noise. will not occur.

It goes without saying that a gimbal coated with such a damping material by a screen printing method also damps vibrations other than those caused by the resonance described above.

Furthermore, with the manufacturing method of the present invention, the damping material of the gimbal can be coated in large quantities onto each etching plate using the screen printing method, which provides a magnetic head device that is homogeneous and has excellent mass productivity, and is also inexpensive. can do.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing an example in which a magnetic head device manufactured by the manufacturing method of the present invention is applied to a double-sided floppy disk drive or the like. FIG. 2 is a schematic plan view of a tunnel erase type magnetic head section. FIG. 3 is a schematic plan view showing the shape of the gimbal. FIG. 4 is a perspective view showing a gimbal manufactured by the manufacturing method of the present invention. FIG. 5 is a schematic perspective view illustrating the method of manufacturing the gimbal of the present invention. 1-------------Carriage part 2--
------------Arm part 3---------------Side O magnetic head part 4
----------------------Side 1feL head part 5-------------1----Magnetic disc claw----- Coil spring 7-----
------・-Side l gimbal 8----------------------
---Side l gimbal 8 a ---------
One inner notch 8 b -------One outer notch 9 a ---One inner connecting part 9
b ------------Outer connecting part 9----
−−−−−−−−−Hinge part 10−−−−−−−−−
---Magnetic head unit mounting table 11-----
---One elastic spring part 12-----------------
Core 13---1・---1---Read/write, gap 14-m---1---Erase gap 15------ ------Slider part 21--------・-- Vibration damping material

Claims (1)

[Claims] 1. A method of manufacturing a magnetic head device in which a magnetic head section is attached to a support member via a gimbal, the method comprising: coating a surface of the gimbal with a damping material using a screen printing method.