JPH01176306A - Track matching method for plural magnetic heads - Google Patents

Abstract

PURPOSE:To obtain high accuracy and to eliminate proficiency by executing a track matching between the recording head and reproducing head of a multi- channel magnetic head by using a screw and a piezoelectric element. CONSTITUTION:The side surface of a recording head 1 and the side surface of a reproducing head 2 are abutted and inserted to a frame type jig 3 and the side surfaces of both heads 1 and 2 are lightly pressed and fixed by a pressing screw 4 which is equipped in the frame type jig 3. Then, the track matching of both heads 1 and 2 is executed with using pressing screws 6 and 10, which are equipped to the frame type jig 3 in the upper part of one of the magnetic heads at least, and a piezoelectric element 8, which is equipped in the tip of the pressing screws 6 and 10 or the upper or lower edge of one of the magnetic heads 2 at least. Accordingly, for the tightening adjustment of the pressing screw, it is enough to tighten the screw coarsely and after that, the complete adjustment can be accurately executed by adding and subtracting the stretch driving voltage of the piezoelectric element. Thus, the high accuracy can be obtained and the proficiency can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. The present invention relates to a method for manufacturing a multi-channel magnetic head, for example, for DAT, in which a magnetic head for recording and a magnetic head for reproduction are integrated. The present invention relates to a method for performing this with high precision.

For example, a multi-channel recording magnetic head and a reproducing magnetic head used in a DAT are mounted in a frame-shaped jig by aligning the side surface of the recording head 1 and the side surface of the reproducing head 2, as shown in FIG. 3, screw in the press screw 4 provided on the frame-shaped jig 3, and press it between the foamer material 5 made of a spring or the like.
Press and fix.

In this state, to align the tracks with both heads, while observing with a microscope, screw in the pressure screws 6 or 10 in the direction perpendicular to the pressure screws 4 provided on the frame-shaped jig at the top of both heads. This is done by moving the head left and right and up and down. In this manner, after track alignment, the recording head 1 and the reproducing head 2 are bonded and integrated.

In the above-mentioned multi-channel magnetic recording, track alignment of the recording/reproducing head is required to be accurate to within a few micrometers, but in the conventional technology, track alignment was performed by screwing in a screw. Accuracy was affected by the pitch of the screws used for screwing in. The pitch of a typical metric screw is about 400 to 500 μm, and it was difficult to perform track alignment with an accuracy of within a few μm.

Therefore, in the case of track alignment of around 10 μm, adjustment is extremely troublesome, requires considerable skill, and still takes a long time.

. The present invention has been proposed in view of the above problems, and provides a manufacturing method for highly accurate track alignment of a multi-channel magnetic head.

In the present invention, the side surfaces of the recording head and the playback head are butted together and inserted into a frame-shaped jig, and the side surfaces of both the heads are lightly pressed and fixed by a pressing screw provided on the frame-shaped jig, and at least one of the heads is fixed. track alignment of both heads using a pressing screw provided on the frame-shaped jig above the magnetic head and a piezoelectric element provided at the tip of the pressing screw or at the upper end or lower end of at least one of the magnetic heads; This method is characterized by the following.

According to the present invention, it is only necessary to coarsely tighten the pressure screw, and then fine finishing adjustment can be made by adjusting the expansion/contraction drive voltage of the piezoelectric element, and the track alignment work can be performed by a skilled worker. You don't need to.

Five Masters of Disaster Hereinafter, the present invention will be explained in detail with reference to Examples.

FIG. 1 shows a frame assembly jig 3 used in the present invention, and shows a recording magnetic helad 1. FIG. 2 is a plan view of a reproducing magnetic head 2 mounted thereon.

The frame assembly jig 3 includes a piezoelectric element 7, buffer materials 5, 9, 11 such as springs, and an outer frame 13, on which a magnetic head 1 is attached.
and 2 are arranged and fixed with press screws 4, 6, and 10. The magnetic heads 1 and 2 are arranged with the surface facing the recording medium facing upward, and the press screw 4 is lightly tightened for temporary fixation, and then the press screw 10 is tightened to fix the magnetic head 1. Push in the pressure screw 6 and remove the magnetic head 2.
Roughly adjust the track position while moving and observing with an optical microscope. In order to perform further fine adjustment, the DC voltage applied to the piezoelectric element 7 is varied to achieve accurate track alignment. For example, if a piezoelectric element that can be displaced by 0 to 10 μm at a voltage of 0 to 100 V is used, track alignment on the μm order becomes possible.

After track alignment, both heads 1 and 2 are fixed with adhesive,
It is removed from the frame-shaped jig 3 and attached to a magnetic head device for use. Alternatively, after both heads 1 and 2 are adhesively fixed, they may be attached to a magnetic head device with the outer frame 13 attached. Furthermore, both heads 1 and 2 are not glued together,
Attach it to the magnetic head device while attached to the frame-shaped jig,
The track direction may be adjusted while the head and magnetic head device are operating.

Note that the present invention is not limited to the case where a piezoelectric element is provided at the tip of the screw 6 as in the above embodiment. A piezoelectric element may be used. In short, as shown in FIG. You may also try adjusting the position.

``According to the present invention, since the track alignment of the recording and reproducing heads of a multi-channel magnetic head can be performed using screws and piezoelectric elements, the position adjustment range for track alignment is wide. It has become possible to efficiently and easily perform high-precision positioning on the order of micrometers, significantly contributing to improved mass productivity.

[Brief Description of the Drawings] Fig. 1 is a plan view of a frame assembly jig for explaining one embodiment of the present invention, and Fig. 2 is a plan view showing a partial modification of the jig shown in Fig. 1. FIG. 3 is a plan view of a conventional frame assembly jig. In each figure, 1 is a recording head, 2 is a playback head, 3 is a frame assembly jig, 4 is a screw, 5 is a buffer, 6 is a screw, 7
1 is a piezoelectric element, 8 is a voltage source, 9 is a buffer, 10 is a screw, 11 is a buffer, 12 is a plate, and 13 is an outer frame. 2τ 1 Figure 2

Claims (1)

[Claims] In a magnetic head manufacturing process when integrating a multi-channel magnetic head for recording and a multi-channel magnetic head for reproducing, a recording track of the multi-channel magnetic head for recording and a multi-channel magnetic head for reproducing are integrated. A plurality of magnetic heads characterized in that positioning of reproduction tracks is performed by using a pressing screw provided on a frame-shaped jig and a piezoelectric element provided at the tip of the pressing screw or at the upper end or lower end of at least one of the magnetic heads. How to align magnetic head tracks.