JPH0658406U - Magnetic head for hard disk - Google Patents

Abstract

(57) [Abstract] [Purpose] By balancing the coils on the core side of the slider side and the yoke side that make up the magnetic head,
This is to obtain a magnetic head for a hard disk with less noise. [Structure] Slider 11 and yoke 12 made of a magnetic material
Forming winding grooves 11a, 12a inside the core side portion of
On the opposite side of the gap 15 formed when the slider 11 and the yoke 12 are bonded, winding portions 11b and 12b having a uniform thickness are formed, and the winding groove 11a and
A uniform film pressure of the metal magnetic thin film layer 13 is formed on the inner surface of 12a, and a gap material such as glass is attached to the adhesive surface between the slider 11 and the yoke 12 and heat-bonded to form the gap 15. A magnetic head for a hard disk characterized in that a coil 14 is balanced-wound around winding portions 11b, 12b of a slider 11 and a yoke 12 located in the front-rear direction of the gap 15.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic head for a hard disk used in electronic devices such as personal computers and word processors.

[0002]

[Prior art]

 Conventionally, various types of magnetic heads of this kind of electronic equipment have been proposed according to the purpose and function thereof. For example, as shown in FIGS. 4 and 5, magnetic permeability is large and magnetic characteristics are excellent. The slider 1 formed of a non-magnetic material such as ferrite or sendust and the core of the yoke 3 having the coil 2 wound around the winding groove 3a are butted against each other to form a gap 4, and the disk running surface of the slider 1 is A monolithic type magnetic head 6 machined as an air bearing surface 5 is known.

The magnetic head 6 is fixed to the tip of a carriage 7 installed in a hard disk drive (not shown), and is installed on both sides of a hard disk 8 inserted in a drive device. When the hard disk 8 rotates at a high speed, the magnetic head 6 rises above the surface of the hard disk 8 and a predetermined air gap is formed between the magnetic head 6 and the hard disk 8 to record / reproduce information. ing.

[0004]

[Problems to be solved by the device]

 However, in the above-described magnetic head having the conventional structure, the coil 2 constituting the magnetic circuit is wound only around the winding groove 3a on the yoke 3 side, so that the magnetic field in the front-back direction is sandwiched by the gap 4 of the magnetic head 6. The characteristics are different, and the magnetic field is likely to be affected by an external magnetic field from the direction of the arrow on the hard disk 8 side, which causes noise, and there is a problem that a highly accurate magnetic head cannot be obtained.

An object of the present invention is to solve the above-mentioned problems of the conventional structure. By balancing the coils on the slider side and the core side of the yoke side that compose the magnetic head, noise is reduced. To get a magnetic head for a hard disk.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, a magnetic head for a hard disk according to the present invention has a winding groove formed inside a core side portion of a slider and a yoke made of a non-magnetic material, and the slider and the yoke are bonded together. At the opposite side of the gap that is sometimes formed, a winding part with a uniform thickness is formed, and a uniform film pressure of the metal magnetic thin film layer is formed on the inner surface of the winding groove. A gap material is formed by pasting a gap material such as glass on the bonding surface between the slider and the yoke and heat-bonding, and the coil is balanced wound around the winding part of the slider and the yoke located in the front-back direction of the gap. It is characterized by having done.

[0007]

[Action]

 According to the magnetic head for a hard disk of the present invention configured as described above, the coils wound around the cores on the slider side and the yoke side are evenly balanced-wound in the longitudinal direction of the gap. The noise generated by this is reduced, and a highly accurate magnetic head can be obtained.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing a winding part of a magnetic head for a hard disk according to the present invention. In the figure, reference numeral 10 is a magnetic head, and the slider 11 and the yoke 12 constituting the magnetic head 10 are formed by a magnetic material such as ferrite, ceramics, sendust or the like having excellent magnetic characteristics. Inside the core side portions of the slider 11 and the yoke 12, there are formed winding grooves 11a and 12a in a V shape formed by a combination of substantially straight lines and circular arcs. Further, on the opposite side of the gap 15 formed when the slider 11 and the yoke 12 are bonded, thinned portions 11c and 12c having winding portions 11b and 12b of uniform thickness are formed. It

A uniform film pressure of the metal magnetic thin film layer 13 is formed on the inner surfaces of the winding grooves 11 a and 12 a of the slider 11 and the yoke 12 by a sputtering method or a vapor deposition method. Then, a gap material such as glass is adhered to the bonding surface of the slider 11 and the yoke 12 for alignment, and the gap 15 is formed by heating and bonding with a heating device such as an electric furnace. After the slider 11 and the yoke 12 are bonded together, the magnetic head 10 is formed by balancing the coils 14 in equal number of turns around the winding portions 11b and 12b located in the front-rear direction of the gap 15.

FIG. 2 is a side view showing a winding portion of a magnetic head for a hard disk according to a second embodiment of the present invention. In the figure, a slider 21 and a yoke 22 which form a magnetic head 20 are formed of a non-magnetic material. Further, inside the core side portions of the slider 21 and the yoke 22, winding grooves 21a and 22a having a dogleg shape are formed by a combination of substantially straight lines and circular arcs. Further, on the side opposite to the gap 25 formed when the slider 21 and the yoke 22 are bonded together, the winding portions 21b and 22b each having a uniform thickness are left, and are lightened. Then, the metal magnetic thin film layer 23 is formed on the inner surfaces of the winding grooves 21a and 22a of the slider 21 and the yoke 22, and the slider 21 and the yoke 22 are adhered to form a gap 25, and the winding portions 21b and 22b are formed. The magnetic head 20 is constructed by winding the coil 24 in a balanced manner.

FIG. 3 is a side view showing a winding portion of a magnetic head for a hard disk according to a third embodiment of the present invention. In the figure, a slider 31 and a yoke 32 constituting a magnetic head 30 are provided inside a core side portion. Has winding grooves 31a and 32a formed therein. In addition, on the opposite side of the gap 35 formed when the slider 31 and the yoke 32 are bonded together, the winding portions 31b and 32b having uniform thickness are left, respectively. Then, the metal magnetic thin film layer 33 is formed on the inner surfaces of the winding grooves 31a and 32a of the slider 31 and the yoke 32, and the slider 31 and the yoke 32 are adhered to form a gap 35, and the winding portions 31b and 32b are formed. The magnetic head 30 is constructed by winding the coil 34 in a semi-balanced manner.

In the embodiment of the present invention, as shown in FIG. 1 to FIG. 3, a slider and a yoke forming a metal magnetic thin film layer inside the core side of the yoke of the magnetic head will be described. However, the magnetic path is not limited to this, and the magnetic path is formed by a core made of only a non-magnetic material without a metal magnetic thin film layer, or the core part of the non-magnetic material is formed in a thin substrate shape. However, it is possible to obtain a modification in which the magnetic path is formed only by the metal magnetic thin film layer.

[0014]

[Effect of device]

 As described above in detail, the magnetic head for a hard disk of the present invention is a monolithic type magnetic head in which a slider and a yoke are butted to form a gap, and the disk running surface of the slider is processed as an air bearing surface. As a result, the coils wound around the cores on the slider side and the yoke side are evenly balanced in the front-rear direction of the gap, reducing the noise generated by the external magnetic field and obtaining a highly accurate magnetic head. You can

[Brief description of drawings]

FIG. 1 is a side view showing a winding part of a magnetic head for a hard disk according to the present invention.

FIG. 2 is a side view showing a winding part of a magnetic head for a hard disk according to a second embodiment of the present invention.

FIG. 3 is a side view showing a winding part of a magnetic head for a hard disk according to a third embodiment of the present invention.

FIG. 4 is a side view showing a usage state of a magnetic head for a hard disk having a conventional structure.

5 is a perspective view of the magnetic head for a hard disk of FIG. 4 with a gap surface facing upward.

6 is a side view showing a winding part of the magnetic head for a hard disk of FIG.

[Explanation of symbols]

 10 magnetic head 11 slider 11a winding groove 11b winding part 12 yoke 12a winding groove 12b winding part 13 metal magnetic thin film layer 14 coil 15 gap

Claims (1)

[Scope of utility model registration request] 1. A winding groove is formed inside a core side portion of a slider and a yoke made of a magnetic material, and a winding groove is formed on a side opposite to a gap formed when the slider and the yoke are bonded. A uniform winding part is formed, a uniform film pressure of the metal magnetic thin film layer is formed on the inner surface of the winding groove, and a gap material such as glass is attached to the adhesive surface between the slider and the yoke and heated. A magnetic head for a hard disk, wherein a gap is formed by bonding, and a coil is balanced-wound around a winding portion of a slider and a yoke located in the front-back direction of the gap.