JPH0352114A - Floating type magnetic head - Google Patents

Abstract

PURPOSE:To facilitate winding by fixing a magnetic head chip which is formed by butting one set of cores on each other and joining the cores by primary glass into the groove of a floating slider by secondary glass. CONSTITUTION:Slide rails 1a are provided on the medium-facing surface of the slider 1 consisting of the polycrystallite of ferrite and a groove 5 for embedding a magnetic head chip 2 is formed at the intermediate. The chip 2 is formed by butting one set of the cores; the I core 2a and the C core 2b having a winding groove 2c, on each other and packing the primary glass 3 into both butt surfaces and the groove 2c of the core 2b. The chip 2 is inserted into the groove 5 of the slider 1 by projecting the core 2b and is adhered and assembled by the secondary glass 4. Since the winding groove 2c is exposed on the outside, the winding is easy and the magnetic head is produced with high efficiency.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic disk! ! This relates to floating magnetic heads used for installation, etc. [Jubei technology] As shown in Figure 4(a), a floating magnetic head that flies approximately parallel to a rotating magnetic recording medium (hereinafter referred to as the medium) in a magnetic disk device, etc.
Slide rails la and lm are provided on both sides of the medium facing surface of a floating slider (hereinafter referred to as slider) 1 made of a 7-effect polycrystal such as Mn-Zn ferrite or Ni-Zn ferrite, and a center track 1b is formed in the middle of the slide rails la and lm. As shown in Fig. 4(b), there is a monolithic type in which a C-coat 712, which is also made of 7-Elite material and has a winding groove, is joined with a lath 13 at the medium outlet end, and a non-magnetic material such as ceramics as shown in Fig. 4(b). Slider 1 consisting of
Slide rails la, la provided on both sides of the medium facing surface of
In the groove 5 provided on the medium outflow end side of one of them,
A composite type is used, in which a magnetic head chip 2 is inserted into which a pair of cores (I core and C core) made of ferrite material are bonded together with primary glass, and then bonded with a secondary lath 4. As magnetic recording density increases, media are being made to have higher saturation magnetic flux densities and higher coercive forces. With this development, magnetic heads are required to have higher performance such as higher saturation magnetic flux density. For this reason, magnetic heads such as so-called MIG heads have been developed in which a magnetic thin film of metal such as sendust is formed on at least the gap-shaped surface of the abutting surface of the core made of 7-elite, which has been effective in improving performance. ．． [Invention tries to solve it! Illll) However,
In manufacturing the MIG head, it is necessary to form the metal magnetic thin film on the abutting surface of an expensive 7-elite core carrier. Therefore, the conventional monolithic magnetic head is replaced by MIG.
If it is made into a head, the cost will be high because it will be necessary to form a metal magnetic thin film even on the parts of the slider that do not function as a magnetic head, and expensive materials will be used for the slider. In addition, since the ferrite core 7 including the slider part is placed on the holder of the sputtering device for forming the metal magnetic thin film, the number of right-effect areas 7 that can be sputtered is limited, and from this point of view, the work This is one of the reasons why efficiency cannot be improved and costs are high. One solution to the above problem is the aforementioned Funboknot type magnetic head, but this type of magnetic head places a magnetic head chip made of ferrite material in the groove of an inexpensive slider made of a non-magnetic material such as ceramics. Since it is buried, the cost is low. However, it is said that the combo type magnetic head is generally inferior in ivcss performance compared to the monolithic type magnetic head. This CSS resistance is an important performance that determines the reliability of a floating magnetic head. The present invention solves the above-mentioned problems of conventional manufacturing, and provides an inexpensive floating magnetic head that has excellent CSS resistance, can be manufactured with high efficiency, and can be easily wound, so that costs can be reduced. This is the purpose. [Means for Solving the Problems] The present invention is intended to achieve the above-mentioned object, and the first invention is to abut a pair of cores and to form a winding between the abutted surfaces and on one core. A magnetic head chip is formed by filling the groove with *glass and bonding the pair of cores together.
A floating slider made of ferrite polycrystalline material is fixed in a groove provided on the outflow end side of a magnetic recording medium, and is bonded with a secondary glass. #Is some of the sliders floating
A third invention is characterized in that the ferrite material constituting the magnetic head chip is single-crystal ferrite. , a magnetic head chip is characterized in that a metal magnetic thin film is formed at least on the gap portion of the abutting surfaces of a pair of cores constituting the magnetic head chip. [Function] A magnetic head chip consisting of a pair of cores butted together with primary glass is embedded in the groove of a slider made of inexpensive material with secondary glass, so it has the same functionality as the composite type. It can be easily manufactured at low cost and has icss properties equivalent to the molythic type. Although the entire magnetic head chip may be buried in the groove of the slider, if a portion of the magnetic head chip is buried so as to protrude from the end of the slider, the same effect as when the entire magnetic head chip is buried can be obtained. Furthermore, winding becomes easier and manufacturing efficiency can be improved. Further, the above magnetic head chip was attached to MItt. By using single-crystal ferrite as the ferrite material, the performance of the magnetic head can be further improved.

Furthermore, if a metal magnetic thin film is formed at least in the gap of the abutting surfaces of a pair of cores (I-fa and C-cores) that drive the magnetic head chip, high saturation density can be achieved and high A magnetic head with high performance is obtained. [Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1(a) is a perspective view of a floating magnetic head according to the present invention, FIG. 1(b) is a perspective view of a slider, FIG. 1(e) is a perspective view of a magnetic hesode chip, and FIG. 2(a). (b) is a perspective view showing a part of the process of manufacturing a magnetic hefed chip, and FIG. 3 is a diagram comparing itcss properties. In the figure, 1 is Mn-Zn ferrite or Ni-
The slider is made of a 7-erite polycrystal such as Zn ferrite, and is shaped as shown in Figure 1(b), with slide rails on both sides of the surface facing the medium (top surface in the figure).
a, lg are provided, and a groove 5 for embedding the magnetic head chip 2 is formed between them. Therefore, the dimensions of each part are: 1 = 4, Osm, #Aw = 3
．． 2a+m, height h=1; 27m.

2 is Mn-Zn7z light or Ni-Zn
In a magnetic head chip made of a ferrite phase such as ferrite, a pair of cores 72a and C core 2b having a winding m2c are butted together, and a primary is formed between the butted surfaces and in the winding #X groove 2c of the C core 2b. The lath 3 was filled and formed as shown in Fig. 1(c). However, in order to manufacture this magnetic throat tip 2,
First, as shown in Figure 2 (II), the length L1 = 25 m
m, width W. = 1.5 mm, height H, = 1.3 mm I core carrier 2A, and length L2 = 2 5ms + , [M
/2=1. 0mm, height H. = 1.3■ and a C-7 carrier 2b having a long groove 2C which becomes a winding groove 2c is prepared, and among the abutted surfaces of both core carriers, the surface of the C-core carrier 2Bl is lapped to give a mirror finish. A metal magnetic thin film 6 made of Nisendust with a thickness of 1.5 μm was formed on this surface by sputtering. After that, as shown in Fig. v42 (b), ■ core carrier 2A and C core body 2B are butted together, softening point (Ts) = 540°C.
Both carriers are joined (primary bonding) with the lath 3 at a temperature of 700°C to form the gear Y lug portion G, and the groove 2C is also filled for reinforcement. Chip carrier 2D was produced. Next, after cutting this chip carrier 2D to a predetermined thickness, finishing processing such as lapping is performed to obtain the dimensions shown in FIG. 1(c) (length: 1, = 2.5 am, height: h).
,=1,27 plowshare, thickness t=0.1 5+am)
A magnetic head chip 2 was obtained.

This magnetic head chip 2 is attached to the 'W45' of the slider 1.
Insert the C core 2b protrudingly into the
) = 400°C Secondary lath 4 was bonded (secondary bonding) at a temperature of 510°C and assembled as shown in Figure 1 (a). However, in this embodiment, as shown in FIG.
), since the C core 2b of the magnetic head chip 2 protrudes from the medium outlet end of the slider 1, the winding groove 2
c is exposed to the outside. Therefore, winding can be done easily. In this case, the W4 groove 1b on the medium outflow end side of the slider 1 may not be provided. However, when the entire magnetic head chip 2 is buried in the groove 5 of the slider 1, the lateral groove 1b is provided if necessary to facilitate winding. In addition, in this embodiment, the I-column 7 including the gap portion G is
A thin film 6 of Sendust was formed on the abutting surface between the C part 2a and the C part 72b to improve the performance of the M I G head. No. Furthermore, in this embodiment, the magnetic head chip 2 is made of Mn-Zn ferrite or Ni-Zn ferrite material, but the performance can be further improved by making it from single-crystal ferrite. be.

Figure 3 shows the results of testing the eCSS properties of the magnetic head manufactured as described above and completed after post-processing such as winding M. As seen in Fig. @3, the magnetic head of the present invention exhibited excellent @CSS performance that was almost equivalent to that of the comparative example of the Norithic type magnetic head manufactured by Jumei and the United States, and the coefficient of friction (μ)
are almost equivalent. [Effects of the Invention] As described above, according to the present invention, it is possible to obtain a floating magnetic head having gCSS properties and other excellent performance, and furthermore, winding is easy, and the number of wires to be sputtered at one time can be increased. It has many advantages, such as being able to manufacture it with high efficiency, reducing costs, and being able to provide it at a low price.

[Brief explanation of drawings]

Figure 1 shows an embodiment of the present invention, in which (a) is a perspective view of a floating magnetic head in an assembled state, (b) is a perspective view of a slider, and (c) is a perspective view of a magnetic tip. be.
Figures 2 (a) and (b) are perspective views showing part of the manufacturing process of the magnetic head chip, Figure 3 is a diagram showing the CSS resistance test results, and Figures 4 (a) and (b) are It is a perspective view of Jubei's floating magnetic six head. 1: Slider 1a: Slide rail,
2: Magnetic head chip, 2a: I=+7,
2b: C: 7a, 2c: Winding groove,
3: Primary lath, 4: Secondary lath,
5: W4, 6: Metal magnetic thin film, G
: Gap part

Claims (4)

[Claims] (1) A magnetic head chip is produced by abutting a pair of cores, filling primary glass between the abutting surfaces and into a winding groove formed in one core, and joining the pair of cores together,
A floating magnetic head characterized in that it is fixed in a groove provided on the outflow end side of a magnetic recording medium of a floating slider made of ferrite polycrystalline material, and is bonded with secondary glass. (2) The floating magnetic head according to claim 1, wherein a part of the magnetic head chip is made to protrude from an end of the floating slider. (3) Claim 1 or 2, wherein the ferrite material constituting the magnetic head chip is single crystal ferrite.
The floating magnetic head described. (4) The floating magnetic head according to any one of claims 1 to 3, characterized in that a metal magnetic thin film is formed at least in the gap portion of the abutting surfaces of the pair of cores constituting the magnetic head chip.