JPS6364619A - Composite type floating head - Google Patents

Abstract

PURPOSE:To eliminate the need for a stage for screening heights of sliders and to improve workability by slotting the floating surfaces of a nonmagnetic slider to which a magnetic core is mounted to form the grooves having the edges perpendicular to the floating surfaces, thereby stipulating the width of the floating surfaces. CONSTITUTION:The magnetic core 22 is fixed by a glass adhesive agent to the nonmagnetic slider 20 consisting of barium titanate or calcium titanate. The slider 20 has the floating surfaces 24 projected slightly to both sides of the surface to face a magnetic disk. The core 22 is mounted into the slit formed to part of one floating surface. The floating surfaces 24 are formed by slotting. The width of the floating surfaces is stipulated by forming the grooves having the edges perpendicular to the floating surfaces 24. Side walls 28 on both sides of the floating surfaces 24 are perpendicular to the floating surfaces 24. The width of the floating surfaces is thus stipulated to the prescribed width without being affected by the slider height, by which the need for the stage for screening the heights of the sliders is eliminated and the workability is improved.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a composite floating head used in a magnetic disk drive, and more specifically, the present invention relates to a composite floating head used in a magnetic disk device, and more specifically, the air bearing surface is improved by grooving perpendicular to both air bearing surfaces. This invention relates to a composite type floating head with a defined width.

[Prior Art] Various structures are known for magnetic head devices that read/write digital signals on magnetic disks, one of which is a composite type floating head.

This composite type floating head has a structure in which a magnetic core 12 is fixed to a non-magnetic ceramic structure called a slider 10, as shown in FIGS. 4 and 5. The slider 10 has a slightly protruding air bearing surface 14 on both sides of the surface facing the magnetic disk. Usually, a slit is formed in one of the air bearing surfaces, a magnetic core 12 is inserted therein, and the slider 10 is fixed with glass adhesive or the like. After polishing the surface, a coil 16 is wound around the magnetic core 12 to manufacture it.

In order to construct the air bearing surface 14, conventional technology performs grooving at an angle θ (normally 45 degrees or about 60 degrees) with respect to the air bearing surface, and creates chipping (fine defects) on the ridgeline. etc.) from occurring.

In a floating head, during normal operation, the slider floats slightly due to the pressure of the airflow generated by the rotation of the magnetic disk.
The magnetic core writes information to and reads information from the magnetic disk.

[Problems to be Solved by the Invention] As mentioned above, in the conventional technology, a tapered ridge is processed to form the air bearing surface, so when polishing the head air bearing surface in the manufacturing process, the slider height is The width of the air bearing surface is affected by this. For this reason, it is necessary to select the height of each slider in advance, which poses a problem of increasing the number of man-hours.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art as described above and to provide a composite floating head that can define the width of the air bearing surface without being affected by the slider height.

[Means for Solving the Problems] The present invention, which can achieve the above-mentioned objects, has a floating head in which a magnetic core is attached to a non-magnetic slider, in which an edge perpendicular to the air bearing surface of the non-magnetic slider is This is a composite type floating head in which the width of the air bearing surface is defined by grooving.

The present invention was made based on the fact that if a non-magnetic ceramic material such as calcium titanate or barium titanate is used as the material for the slider, chipping is less likely to occur even when grooving is performed perpendicularly.

[Function] Since the air bearing surface of the non-magnetic slider is formed by grooving with edges perpendicular to it,
Even if the slider height changes due to polishing of the air bearing surface, the width of the air bearing surface does not change.

This eliminates the need for a height selection process for defining the width of the air bearing surface in the manufacturing process, resulting in a significant improvement in yield and workability.

Embodiment I FIG. 1 is a perspective view showing an embodiment of a composite shift type floating head according to the present invention, and FIG. 2 is a front view thereof.

The basic structure may be almost the same as that of the conventional technology except for the shape near the air bearing surface.This floating head has a magnetic core 22 attached to a non-magnetic slider 20 made of barium titanate or calcium titanate using a glass adhesive. It is a fixed structure. The nonmagnetic slider 20 has air bearing surfaces 24 that protrude slightly on both sides of the surface facing the magnetic disk, and the magnetic core 22 is installed in a slit formed in one of the air bearing surfaces.

The air bearing surface 24 is formed by grooving.

The present invention is significantly different from the prior art in that the width of the air bearing surface is defined by grooves having edges perpendicular to the air bearing surface 24. In other words, the side walls 28 on both sides of the air bearing surface 24
is perpendicular to the air bearing surface 24.

In this case, the entire side surface of the air bearing surface does not necessarily have to be vertical, and at least only the vicinity of the air bearing surface side (the part to be polished later) may have a vertical shape.For example, as shown in No. 31F, the air bearing surface The structure may be such that only the side wall 30 on the side (tip side) is vertical, and the base side 32 is tapered.

After the air bearing surface is polished, the magnetic core 22 is wound with a coil (not shown).

Although a preferred embodiment of the present invention has been described above in detail, it is important to note that the present invention is not limited to only such a configuration. In the above embodiment, the magnetic core is attached to only one side of the two air bearing surfaces, but a floating head with magnetic cores attached to both sides, or a rail provided in the middle of the two air bearing surfaces, may be used. It can also be applied to a floating head etc. that has a structure in which a magnetic core is attached.

[Effects of the Invention] As described above, the width of the air bearing surface is defined by grooves having edges perpendicular to the air bearing surface of the non-magnetic slider. This is extremely effective in that the width can be defined to a predetermined value, the step of selecting the height of the slider is not necessary, and the yield and workability can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of a composite floating head according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a front view showing another embodiment of the present invention, and FIG. 4 is a conventional one. A perspective view showing an example of the technique, and FIG. 5 is a front view thereof. 10.20... Nonmagnetic slider, 12.22... Magnetic core, 14.24... Air bearing surface. Patent applicant Fuji Electrochemical Co., Ltd. Agent Shigeru Mi Seed box Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A composite type floating head in which a magnetic core is mounted on a non-magnetic slider, characterized in that the width of the air bearing surface is defined by grooves having edges perpendicular to the air bearing surface of the non-magnetic slider.