JPS58100273A - Floating head slider - Google Patents

Abstract

PURPOSE:To obtain a floating head slider which makes the fixed-head-disk-file formalization or short seeking distance formalization easy, by forming plural sets of negative pressure generating sections in parallel with each other in the longitudinal direction of the constitutins surface. CONSTITUTION:A floating head slider 1 is formed with a rectangular block 2 having (l), length and positive pressure generating sections 5 and negative pressure generating sections 4, which are separated from each other by buoyancy adjusting grooves 6, are installed in parallel with each other in the longitudinal direction of the constituting surface 3. Magnetic thin film heads 8 are installed to the utmost rear end parts 9 of the generating sections 4. When such simple constitution which can easily be produced is used, the floating head slider which can make the fixed-head-disk-file formalzation and the short seeking distance formalization easy is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floating rad slider for dosing or short seek distances on flexible media such as floppy disks.

Conventionally, in magnetic disk drives that use flexible media, such as floppy disk drives, one head is assigned per recording surface to select a predetermined track (seek), similar to disk drives that use normal rigid disks. The method is adopted.

Therefore, track selection requires a relatively long seek time of several tens to hundreds of m5ec, and has the drawback of low information throughput. On the other hand, it is possible to realize the Drisk format (where multiple heads are arranged on the recording surface and one head is assigned to each track), or the short seek format, which greatly reduces the seek distance by reducing the number of tracks assigned to each head. When increasing the throughput by using the distance type, precise fine adjustment of the protrusion fl, etc. is required for each head, and the head support mechanism becomes extremely complicated.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, the present invention provides a floating rad slider that can easily realize a disk device using a flexible medium in a dry disk format or a short seek distance format. Therefore, the floating RAD slider of the present invention is characterized in that a plurality of negative pressure generating sections are formed in parallel in the longitudinal direction on the slider forming surface of the rectangular slider block.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 shows a floating Radoslider 1 according to an embodiment of the present invention.
2 is a rectangular block that forms the slider base, and its length t is usually several times the width of a conventional head slider.
It is said to be twice as long as the number of people. 3 is a diagram showing the structure of a slider in which two rectangular blocks are provided. On this surface 3, a plurality of recesses 4 having a depth of several micrometers are formed in parallel in the longitudinal direction by a method such as ion etching, and each of the four recesses serves as a negative pressure generating section. The remaining portion 5 of the recess 4 in the slider forming surface 3 becomes a positive pressure generating portion. Note that the groove 6 formed between the positive pressure generating parts 5 may be omitted, but this groove 6 makes the pressure generated in each part independent, and by appropriately setting the groove width, the pressure generated in the positive pressure generating part 5 can be adjusted. It can be set to an appropriate value.

As a method of forming the head recording/reproducing section 8 for the floating RAD slider 1, the following methods (1) to (5) can be considered. Of course, other methods are also possible.

(1) As shown in FIG. 1, a method of forming a head recording/reproducing section 8t in a plurality of recesses, that is, at each rear end portion 9 of the negative pressure generating section 4, with a glass mending gap in between, as in the case of normal head formation. In addition, in the symbols in the figure, lO is a gap, and 11 is a track portion.

A method of forming a head recording/reproducing section on the end portion 12 in the same manner as in (1). Note that the track portion required in this case may be formed at the same time as the negative pressure generating portion 4 by ion etching or the like.

(3) A method of forming a thin film head at the rearmost end 9 of the negative pressure generating section 4.

(4) As shown in FIG. 2, each rearmost end 9 of the negative pressure generating section 4
A method of forming a plurality of head recording/reproducing sections 8 per head.

(5) A method of embedding a head recording/reproducing section in an arbitrary position of the negative pressure generating section 4 or the positive pressure generating section 5.

To operate the RAD slider 1 to the above-mentioned tD float@)r, it is mounted on a fixed stand or a track selection mechanism (both not shown), and the flexible medium 7'f is rotated to float it. In the case of a negative pressure slider, positive pressure and suction force are generated in balance depending on the disk running speed, so above a certain speed, the flying gap between the head and the medium hardly depends on the disk running speed. In other words, even if the slider width t of the floating head slider 1 of the present invention is much larger than that of the conventional one, the flexible medium 7 conforms to the shape of each part of the floating head slider 1 when the medium travels. Modify accordingly 5. do. As a result of this deformation, at any rotational radius position where the running speed is different, as shown in the glofil of FIG. It is constant for each positive pressure generating section 5. Therefore, since a substantially uniform head flying height is obtained over all the tracks, a stable reproduction output voltage proportional only to the respective disk running speed can be obtained from each head recording/reproducing section 8.

Due to the functions and effects of the structure 1 as described above, a drask for a flexible medium can be easily constructed by using only one floating rad slider of the present invention or by arranging a plurality of them in a staggered arrangement. Alternatively, it is possible to construct a high-throughput magnetic disk device that seeks only a minute distance between adjacent heads.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, box 2 is a perspective view showing an example of the formation of a head, and FIG. 3 is an explanatory diagram showing a floating clearance created by the floating rad slider of the present invention. In the drawings, 1 is a floating RAD slider, 2 is a rectangular block, 3 is a slider configuration surface, 4 is a negative pressure generation section, 5 is a positive pressure generation section, 6 is a groove, 7 is a flexible medium, and 8 is a 9 is the rearmost end of the negative pressure generating section, 12 is the rearmost end of the positive pressure generating section, and t is the slider length. Patent applicant Nippon Telegraph and Telephone Corporation

Claims (1)

[Claims] A floating RAD slider characterized in that a plurality of negative pressure generating sections are formed in parallel in the longitudinal direction on a slider forming surface of a rectangular slider block.