JPS60229215A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To manufacture a head suitable to high density recording with high accuracy by applying the 2nd cut slot after a metallic magnetic thin film, a gap layer and the 2nd metallic magnetic thin film to a block having a cut slot so as to bond the 2nd block. CONSTITUTION:The metallic magnetic thin film 4 with high magnetic flux density is formed on the surface of a nonmagnetic substance block 1 having the winding cut slot 2, and after the nonmagnetic substance gap layer 6 and the 2nd metallic magnetic thin film 7 are formed on the film 4, the 2nd cut slot 9 is provided. A low melting point crystallized glass 11 is put into the cut slot 9 and the 2nd nonmagnetic ceramic member 10 is bonded thereto. Then the head block 12 is cut off so as to manufacture head pieces. Thus, the amorphous magnetic thin film such as an amorphous having a sufficiently higher crystallized temperature is formed by using the thin film forming technology and the glass having a low melting point is used, then the magnetic head suitable for high density recording is manufactured with high accuracy.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a method for counterfeiting magnetic heads used in electronic computers, etc. The present invention relates to a method for counterfeiting magnetic heads used in electronic computers, etc. The present invention relates to a method of manufacturing a magnetic head that can be manufactured so that no space is left unoccupied.

(Background of the Invention) In recent years, the direction of magnetic recording for electronic computers has been moving toward 1615 degrees. The development of recording media is being carried out in parallel, and in particular the development of magnetic heads has become an urgent task in order to satisfy the conflicting demands of lower prices and higher precision, and studies are being carried out in various fields. Up to now, proposals have been made for heads made from 7-elite blocks, composite heads made of ferrite blocks and non-magnetic ceramics, and complete thin-film heads using a high-hardness material called Flutic for part of the slider. There is. However, none of them have reached the stage where they can completely satisfy the above requirements.
A head made only of elite blocks cannot accommodate a narrow gap due to head tip saturation, and a composite head made of 7 elite blocks and non-magnetic ceramics has a complicated manufacturing process, making it difficult to achieve high precision. On the other hand, a complete thin-film head is expensive because it requires semiconductor technology processes and high-precision machining of hard materials, and has the disadvantage that it cannot satisfy the requirements.

(Objective of the invention) The present invention improves the above-mentioned drawbacks, and uses an amorphous magnetic thin film (amorphous thin II) or the like with a sufficiently high crystallization temperature Tx as a metal magnetic thin film with high magnetic flux density. It is an object of the present invention to provide a method for manufacturing a magnetic head that has a narrow track and a narrow gap with high accuracy (and can be manufactured without leaving a back gap) so as to be suitable for high-density recording.

(Structure of the Invention) The method for manufacturing a magnetic head of the present invention is characterized in that a first kerf is provided on one surface of a first block made of a non-magnetic material;
forming a first metal magnetic thin film with a high saturation magnetic flux density on a surface including the kerf, and shielding the first kerf with a non-magnetic material to form a non-magnetic material gap above the first metal magnetic thin film; A process of forming a layer and a second layer with high saturation magnetic flux density on top of the layer.
A second kerf is provided substantially perpendicularly to the back surfaces of the first and second metal magnetic thin films and does not reach the #S1 kerf, and a second kerf made of a non-magnetic material is formed. a magnetic head with a narrow track and a narrow gap suitable for use in electronic computers, etc., comprising the step of bonding the second block to the first block by applying a bonding agent in the second kerf, and manufacturing a head block. The reason is that it has become possible to manufacture.

(Embodiments of the Invention) Hereinafter, embodiments of a method for manufacturing a magnetic head according to the present invention will be described with reference to the drawings.

1 to 9 show an embodiment of the manufacturing process of the present invention, and FIG. 10 shows a completed magnetic head.

First, as shown in FIG. 1, a first kerf 2 is provided on one surface of a deformed rectangular block 1 made of a non-magnetic material such as ceramic using a peripheral slicer or the like to form a winding wire in a later process. At this time, the remaining 70 side planes 3A and back side plane 3 of block 1
B is assumed to have been mirror polished.

Next, as shown in FIG. 2, a metal magnetic thin film 4 (for example, Co
- Thin film formation technology (Zn-based amorphous magnetic thin film, high hardness, high magnetic permeability thin film such as sendust, permalloy, etc.) to a predetermined thickness (
For example, sputtering, vapor deposition, plating, CVD method, etc.)
Form using.

Then, as shown in FIG. 3, the upper surface of the first kerf 2 is covered with a plate 5 made of a non-magnetic material, and the iron plate 5 is fixed to the block 1 with adhesive or the like.

Next, as shown in FIG. 4, a non-magnetic gap layer 6 (for example, SiO2, Al2O,...
Ti, Cu, etc.) are formed to a predetermined film thickness on the metal magnetic thin film 4 on the front side plane 3A and on a part of the plate 5 (the gap portion) using a thin film forming technique.

Then, as shown in FIG. 5, a metal magnetic thin film 7 (of the same quality as the metal magnetic thin film 4) is formed on the gap layer 6, the remaining portion of the plate 5, and the upper part of the metal magnetic thin film 4 on the back side plane 3B. After formation using a thin film formation technique, a protection 1I8 (for example, A I 203.5iOz, 5iNSTiN, etc.) is applied over the entire area using a thin film formation technique.

Thereafter, as shown in FIGS. 6 and 7, a plurality of second kerfs 9 are formed so that the opening distance thereof satisfies W0 in the track. The second kerf 9 is formed to cross the tip edges of the metal magnetic thin films 4 and 7, the gap layer 6, and the protective film 8 substantially perpendicularly to reach the tip surface 15 of the block 1. At this time, make sure that it does not reach the first kerf 2.

Next, as shown in FIG. 8, a non-magnetic ceramic material 10 is placed on top of the protective film 8, a low melting point crystallized glass 11 is placed in the second kerf 9, and welded to the block 1911 to form a head block. Make 12.

Thereafter, a plurality of head beads are cut from the head block 12 as shown by the dashed line in FIG. 8, thereby producing a head piece 13 as shown in FIG. 9.

The thus produced head piece 13 has a magnetic circuit consisting of the metal magnetic thin films 4 and 7 joined on the back side and a gap formed by the gap layer 6, and has a predetermined track.

Then, a magnetic head for an electronic computer is manufactured by bonding the helad piece 13 to a non-magnetic slider 14 for an electronic computer floating on a disk as shown in FIG. 10, also using a low melting point glass 16. I can do it.

As explained above, according to the above embodiment, since the magnetic head section is formed using thin film formation technology, the gap length and the inside of the track can be formed with sufficiently high precision compared to the conventional method. It has the feature of not forming a pack gap. In addition, regarding glass bonding, we use crystallized glass that can be welded at a temperature sufficiently lower than the crystallization temperature of amorphous materials, so there is no hardness after welding or remelting during reheating, resulting in high precision. Ends with holding. In addition, since the same type of non-magnetic material can be used for the slider 13 and the helad piece 13, cracks and mismatches due to the difference in thermal expansion coefficient (a value) that have previously occurred during the final joining can be avoided. It is possible to manufacture heads of extremely high precision and quality.

Furthermore, upper metal magnetic thin 1j17 or lower metal magnetic thin 11
If W0 in the 14 tracks is formed using a 7-to-to-7 method, the accuracy of the second kerf 9 by machining as shown in this embodiment is unnecessary, and the accuracy of W0 in the track of the head is improved. can be greatly improved.

(Effects of the Invention) As explained above, according to the method of manufacturing a magnetic head according to the present invention, an amorphous magnetic thin film (Amol 77S) with a sufficiently high crystallization temperature T Thin I
It is possible to manufacture a magnetic head with a narrow track and a narrow gap in accordance with the 111i density recorder with high accuracy and with no gap in the pack by using a magnetic head such as a 111i density recorder, and the effect thereof is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a non-magnetic block used in an embodiment of the present invention, FIGS. 2 to 5 are front views showing the process of forming a metal magnetic thin film etc. on the block, and FIG. FIG. 7 is an enlarged side view of the same, FIG. 8 is a perspective view of the head block, FIG. 9 is a perspective view of the helad piece, and FIG. 10 is the finished electronics. FIG. 2 is a perspective view showing a magnetic head for a computer. 1... Deformed rectangular block, 2... First kerf, 3A
. 3B...Plane, 4.7...Metal magnetic thin film, 5...
Plate, 6... Gap layer, 8... Protective film, 9... Second kerf, 10... Non-magnetic ceramic material, 11... Low melting point crystallized glass, 12... Head block , 13・
...Headpie person, 14...Non-magnetic slider. Takashi Murai, patent attorney and agent for patent applicant TDC Co., Ltd.

Claims (1)

[Claims] (1) A step of providing a first kerf on one surface of a first block made of a non-magnetic material and forming a first metal magnetic thin film with a high saturation electric flux density on the surface including the first kerf; a step of shielding the first kerf with a non-magnetic material to form a non-magnetic material gap layer on top of the first metal magnetic thin film, and forming a second metal magnetic thin film having a bird's saturation magnetic flux density on top of the non-magnetic material gap layer; a step of forming;
A second kerf is provided substantially perpendicular to the back surfaces of the first and second metal magnetic thin films and does not reach the first kerf, and a second block made of a non-magnetic material is placed in the second kerf. A method of manufacturing a magnetic head, comprising the step of providing a bonding agent and bonding it to the first block to produce a herald block.