JPH0378112A - Production of floating type magnetic head - Google Patents

Abstract

PURPOSE:To accurately form a front gap part by cutting a core slider bar and a C-shaped magnetic core in such a manner that the C-shaped magnetic core part is formed in the direction orthogonal with respective gap parts. CONSTITUTION:The core slider 1 and the C-shaped magnetic core part 4 are integrated. Both sides at one end of the core slider 1 and the C-shaped magnetic core part 4 are so notched and formed as to incline toward the back gap side from the side of the surface facing a magnetic recording medium and the C- shaped magnetic core 4a having a prescribed core width is formed in the central part of the C-shaped magnetic core part 4. The notched surfaces formed aslant are finished clean. Since the front gap parts affecting the electromagnetic characteristics are formed in the first stage of the production process, there is no need for delicate mounting of the magnetic core part and the easy assembly is possible. The magnetic head is accurately produced at one time with stable quality in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a floating magnetic head, and more particularly to a method for manufacturing a monolithic type floating magnetic head that is compatible with recent miniaturization and thinning.

[Prior Art] Conventionally, a monolithic type floating magnetic head mounted on a hard disk drive device is shown in FIGS.
As shown in B), there is a core slider 51 constituting the main body, a plurality of floating rails 2 formed in the longitudinal direction on the upper side of the core slider 51, and a glass member or a resin member at one end of the floating rail 2. It has a C-shaped magnetic core portion 54 which is fixed via a fixing member 3 such as the like. The C-shaped magnetic core section 54 has a C-shaped notch for winding a coil. As described above, the core slider 51 and the C-shaped magnetic core part 54 are fixed to the end of the floating rail 2 surface via the fixing member 3 so as to form a front gap part 6a for recording and reproduction, and vice versa. A back gap portion 6b having a relatively wide joint surface is formed on the side.

The core slider 51 is made of a magnetic material such as ferrite, and the C-shaped magnetic core portion 54 is also made of a magnetic material.

In order to manufacture the conventional floating magnetic head constructed as described above, the core slider 51 is manufactured and then the C-shaped magnetic core portion 54 is bonded and fixed thereto.

As shown in FIG. 4(a), first, a base material 62 from which to take out the core slider 51 is prepared.
), a plurality of floating rails 2 are formed on one side of the base material 62, and a core slider 51 is formed on the other side by cutting out a concave support portion 5 in a direction perpendicular to the floating rails 2. Furthermore, as shown in FIG. 4(C), a C-shaped magnetic core section 54 having a core width matching the recording track width (not shown) of the magnetic recording medium is prepared, and this C-shaped magnetic core section 54 is The attachment is fixed so that the core slider 51 is provided with a front gap portion 6a and a pack gearing 6b.

At this time, as shown in FIG. 4(d), the fixing member 3, such as a glass member, is connected to the core slider 51 and C.
The glass member is sandwiched between the glass member and the letter-shaped magnetic core portion 54 and heated to melt, cool and fix the glass member.

Further, the gap portion 6b is formed by sandwiching silicon dioxide, non-magnetic metal material, etc. (not shown) in addition to the glass member (not shown).

[Problem M to be solved by the invention] Incidentally, in recent years, with the advent of small and easily portable personal computers called laptops or hand belt types installed in hard disk drives, etc., it has become possible to use compact, vibration-resistant, and high-density storage. There is a demand for magnetic disk devices that can.

In other words, the recording track width is gradually becoming narrower in response to the miniaturization and thinning of magnetic disks from 3.5 inches, 2.5 inches, and 2 inches, and to higher density recording of magnetic recording media. . Therefore, the core width of the C-shaped magnetic core portion 54 is becoming narrower in accordance with the recording track width.

However, when the core width of the C-shaped magnetic core portion 54 is narrowed, the bonding surface for fixing the attachment to the core slider 51 becomes smaller, resulting in a problem that the bonding strength is weakened and is susceptible to vibrations and the like. Furthermore, when winding a coil around the C-shaped magnetic core section 54, an unreasonable force is applied to the fixed C-shaped magnetic core section 54, and the C-shaped magnetic core section 54 may be strained from the core slider 51. There was a problem.

Also, when starting and stopping, the magnetic head that is in contact with the magnetic recording medium collides with the rotating magnetic recording medium.
There was a risk that a head crash would occur, causing the C-shaped magnetic core section 54 to separate from the core slider 51, resulting in damage to data recorded on the magnetic recording medium.

In addition, in response to the miniaturization of magnetic heads, the C-shaped magnetic core portion 54 has also become smaller and thinner.
The machining of item 4 is becoming more complicated, and it is becoming more difficult to fix the installation. The present invention has been made in view of the above points, and has the problem that the front gap section 6a for recording and reproduction, which has a large influence on the electromagnetic characteristics, cannot be formed effectively. The attachment of the slider and C-shaped magnetic core strengthens the fixation, and the C-shaped magnetic core can be easily processed even if it is made smaller and thinner.
Another object of the present invention is to provide a manufacturing method that allows the front gap portion to be formed with high precision.

[Means for Solving the Problem] Therefore, the base material forming the core slider bar of the present invention and C
A step of integrating the base materials forming the shape magnetic core bar to form a block having a front gap section and a back gap section, and forming a core slider bar having a plurality of floating rails on this block. process and
A step of cutting out the block diagonally from the floating rail to the back gap side to form a C-shaped magnetic core bar in which a C-shaped magnetic core section consisting of a C-shaped magnetic core and a support section is connected, and a step of forming a C-shaped magnetic core bar with these core slider bars. and a step of cutting the C-shaped magnetic core bar in a direction orthogonal to each of the gap portions so as to form a C-shaped magnetic core portion.

[The C-shaped magnetic core part is cut out after forming the C-shaped magnetic core bar, so the gap part can be formed with good precision.
Furthermore, it is strongly attached and fixed to one end of the core slider via the support part.

“Example” An example of the present invention will be described below as shown in FIG. 1 (A) and FIG. 1 (B).
This will be explained based on FIGS. 2(a) to 2(g).

Note that the same parts and parts as those in the conventional example are given the same reference numerals and detailed explanations will be omitted.

In the monolithic type floating magnetic head of the present invention, a C-shaped magnetic core section 4 with wing-shaped core pieces on both sides is formed by cutting out diagonally one end of the block from which the core slider constituting the main body is taken out. It is characterized by

In the monolithic type floating magnetic head of the present invention, as shown in FIGS. 1(A) and 1(B), the core slider 1 and the C-shaped magnetic core portion 4 are integrated, and the core slider 1 and both sides of the C-shaped magnetic core section 4 are cut out so as to be inclined from the surface facing the magnetic recording medium to the back gap side. A C-shaped magnetic core 4a having a core width of . Note that this diagonally formed notch surface is neatly finished. At one end of the levitation rail 2 facing a rotationally driven magnetic recording medium (not shown), an air inflow section 3 for levitating it with air is provided.
1 is formed. Furthermore, a concave support portion 5 is formed on the opposite side of the floating rail 2.

The monolithic type floating magnetic head constructed as described above is assembled as follows.

First, as shown in FIG. 2(a), a rectangular parallelepiped non-magnetic material base material 32 forming several core slider bars 32a and a C-shaped cross section are formed.
A rectangular parallelepiped base material 33 of magnetic material that forms the letter-shaped magnetic core bar 33a is prepared.

Then, as shown in FIG. 2(b), sendust 34 is evaporated to a thickness of several microns on the joint surface side of the member 33 that is to be fixed to the base material 32 using a sputtering device or the like. . Furthermore, as shown in FIG. 2(C), a few microns of silicon dioxide 35 is JIF'd onto the sendust 34 using a sputtering device or the like. In this method, silicon dioxide 35 is deposited on the joint surface to be fixed using a sputtering device.

Next, as shown in FIG. 2(d), the base material 32 and the base material 33 are aligned through the glass member etc. of the fixing member 3, and the glass member etc. is heated at a high temperature and melted. . Then, by cooling the glass member, the glass member is solidified, and the front gap portion 6a for recording and reproduction and the back gap portion 6 are
b is provided to fix the base materials 32 and 33 to form the block 1a. As shown in FIG. 2(e), the block 1a in which the base material 32 and the base material 33 are integrally bonded in this manner is further cut out on its upper surface side to form the floating rail 2. Further, a concave support portion 5 is formed on the opposite side of the floating rail 2, and the primary core forming the core slider bar 32a has a C which matches the predetermined recording track width of the magnetic recording medium.
The core width of the C-shaped magnetic core 4a is determined, and as shown in FIG. 2(f), a predetermined core width is left in the base material 33, and the C-shaped magnetic core I! is placed on the back gap portion 6b side. 64, leaving the bar-shaped core piece 4b serving as the support part of the core slider bar 3.
One end of 2a and the base material 33 fixed to this one end are cut out diagonally in several places from the floating rail 2 side toward the back gap 6b side. A C-shaped magnetic core 33a is then constructed. Finally, several pieces of the block 1a made up of the core slider bar 328 and the C-shaped magnetic core 33a are cut in the direction perpendicular to the gap parts 6a and 6b, and the magnetic A head is formed.

In this way, the monolithic type floating magnetic head of the present invention is completed.

Therefore, since the C-shaped magnetic core part 4 has the core piece 4b, the joint surface between the core slider 1 and the C-shaped magnetic core part 4 can be larger than that of the conventional one, so that the joint strength can be strengthened.

In addition, since the C-shaped magnetic core part 4 can be formed after forming the front gap part 6a, it is no longer difficult to form the front gap part 6a as in the past and causes deterioration of electromagnetic characteristics, and the magnetic recording medium The core width of the C-shaped magnetic core portion 4a can be changed flexibly according to the track width of the C-shaped magnetic core portion 4a. In addition, since a large number of magnetic heads can be produced at one time, multiple identical magnetic heads can be made at the same time by assembling at one time, and a large number of products with stable quality can be manufactured without causing defects in the front gap portion 6a. be able to.

That is, as magnetic heads become smaller and thinner in the future, the method of manufacturing a monolithic type floating magnetic head of the present invention, which is easy to process, will become very effective.

[Effects of the Invention] As explained above, in the method for manufacturing a monolithic type floating magnetic head of the present invention, the core slider bar forming the core slider and the C-shape forming the C-shape magnetic core part are By integrating the C-shaped magnetic core bar with the C-shaped magnetic core bar and cutting out the C-shaped magnetic core having a predetermined core width to form a supporting portion, the following effects can be achieved.

(1) Since the front gap portion, which influences the electromagnetic characteristics, is formed at the first stage of the manufacturing process, assembly is easy without requiring delicate attachment of the magnetic core portion. Furthermore, since the dimensions of the gap portion 6a are the same for each watt,
It can be manufactured in large quantities at one time with stable quality.

(2) Since the C-shaped magnetic core section has a core piece, the joint surface between the core slider and the C-shaped magnetic core section can be made larger than that of the conventional one, so that a significant joint strength can be obtained.

(3) Even if magnetic disks are increasingly required to be smaller and thinner in the future, in the floating magnetic head of the present invention, the C-shaped magnetic core can be easily made smaller and thinner.

[Brief explanation of drawings]

FIG. 1(A) is a perspective view of a monolithic type floating magnetic head in one embodiment of the present invention, FIG. 1(B) is a front view thereof, and FIGS. 2(a) to (1) are respectively in accordance with the present invention. A perspective view showing each step of the manufacturing method of one embodiment of the invention, FIG. 3(A)
is a perspective view of a conventional monolithic type floating magnetic head, FIG. 3(B) is a front view thereof, and FIGS. 4(a) to (d) are perspective views showing each step of the manufacturing method of a conventional example. It is a diagram. 1... Core slider 1a... Block 2... Floating rail 4... C-shaped magnetic core part 4a... C-shaped magnetic core 32a... Core slider bar 4b... Core piece (supporting part ) 33b...C-shaped magnetic core bar 6a...Front gap part 6b...Pack gangs parts 32, 33...Base material diagram (A) 1 1st opening (8) (9) Figure ( A) Section (8) Minein ((1) Section (b)

Claims (1)

[Claims] A step of integrally joining a base material forming a core slider bar and a base material forming a C-shaped magnetic core bar to form a block so as to have a front gap section and a back gap section, and a step of forming a block with a plurality of floats on this block. A process of forming a core slider bar having a rail, and cutting out the block diagonally from the floating rail to the back gap side to form a C-shaped magnetic core section consisting of a C-shaped magnetic core and a support section. A floating type comprising the steps of forming a shaped magnetic core bar, and cutting the core slider bar and the C-shaped magnetic core bar in a direction perpendicular to each of the above-mentioned gaps so as to form a C-shaped magnetic core. A method of manufacturing a magnetic head.