JPS5898825A - Working method of magnetic head for floppy disc - Google Patents

Abstract

PURPOSE:To control accurately the depth of a space at the production time, by fixing a slider having a two-layered structure to the side part of a front core. CONSTITUTION:Core materials 1 and 10 are arranged in the longitudinal direction, and sliders 12 are fixed to both sides as one body. The slider 12 has a two- layered structure consisting of a surface material 13, whose thickness is set to prescribed dimensions, and a substrate 14 which is adhered to the suface material 13. A black adhesive is used, and a black adhesive layer 15 is formed in the part between layers. Surfaces of core materials 1 and 10 and sliders 12 are subjected to spherical working simultaneously. A circular pattern 16 due to the adhesive layer 15 appears on surfaces of sliders 12 by this spherical working, and its diameter is decreased according as the work advances, and the work is terminated when the pattern 16 disappears. The depth of a space 7 is controlled indirectly by the variance of the pattern 16 in the work.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a magnetic head for a floppy disk.

Conventionally, it has been necessary to control the depth of the air gap to a constant size in the magnetic head of Elm, but this is done by relying on machine precision during processing, and the depth of the air gap is directly controlled. isn't it. That is, although the depth of the 70-tibial gap can be measured in the chip state, it is impossible to measure the depth when it is assembled into a housing or the like. Therefore, when measuring the inductance of the R/W coil or setting the machining time, the rising depth t W ul! It is customary to do so. However, when using such means, it is difficult to control the gap depth completely.

However, when looking at the effect of the gap depth on the function, if the depth is too thick, characteristics such as overwriting and output are not good. Further, if the depth is about θ to 10/1 m, there is a problem in terms of life. And cracks are also likely to occur. Furthermore, if the depth is less than θ, it should not be used, but there is also the problem that it is difficult to detect with management using inductance.

The present invention has been made in view of these points, and an object of the present invention is to provide a method for processing a magnetic head for a floppy disk, which allows the depth of the gap to be accurately controlled during manufacturing.

The present invention, in which the sliding surface is processed into a spherical surface, has a two-layer structure and a 12-layer slider fixed to the side of the front core, and when processing the slider together with the spherical surface, the shape of the interlayer part of the slider is changed. By confirming this, the depth of the void is indirectly determined by the curvature of the spherical surface, the thickness of the surface side of the slider, and the position of the void, and this makes it possible to regulate the depth of the void at a constant level during processing. It is configured so that it can be done.

An embodiment of the present invention will be described with reference to the drawings. First, the core body (1) consists of a U-shaped pack core (2) around which a coil (not shown) is wound, and a front core (4) attached to this pack core (2) with a pack gap (3).
It becomes more. This front core (4) has a predetermined gap (7) formed entirely by two front core bodies (5) and (6), and a sloped portion (8) is formed below one front core body (5). is formed and the void depth before processing is set to be dO. In addition, semicircular notches (9) are formed on both sides of this gap (7), and the gap (7) is
7) width is set. Such a core body (1) is for Rβ, and another core body for erasing (1 and another is formed separately).This core body α0 for erasing is almost the same as the core body (1). However, the difference is that a notch α°C is formed in the center and a gap (force is present on both sides).

Next, sliders (6) are provided which are fixed to both sides of the core body (1) α1 arranged in the vertical direction. These sliders (2) have a two-layer structure consisting of a surface material α1 whose thickness is set to a predetermined thickness and a substrate α1 to which this surface material 0 is adhered, and black adhesive is used. A black adhesive layer C1e serving as an interlayer portion is formed.

In this way, the state in which the core body (1) (10 and the slider 0 etc. are integrated is as shown in Figure 3).
The surfaces of the core body (1) αO and the slider (A) are spherically processed at the same time. When this spherical processing is carried out, a circular pattern αQ formed by the adhesive layer OF9 appears on the surface of the sliter (6) as shown in FIG. 4 (α). The diameter of this pattern 0θ becomes smaller as the processing progresses,
For example, the processing is completed when the pattern αQ disappears as shown in FIG. 4 (·). This allows the slider (12
The depth of the gap (7) is determined by the thickness of the surface material 03, the radius of curvature of the spherical surface, and the position of the gap (7).

Therefore, it is possible to indirectly control the depth of the void (7) by changing the pattern Q6 during processing.

Note that the time when the pattern α0 disappeared was defined as the end of processing.
In practice, the pattern OQ may remain and its diameter may be managed.

Alternatively, instead of forming a black adhesive layer (l!3), the slider θ may be entirely laminated with a barium titanate-based material and a potassium titanate-based material.

The present invention fixes a slider with a two-layer structure to the side of the front core as described above, processes the surfaces of this slider and the front core to have a spherical surface with a predetermined curvature, and adjusts the shape of the interlayer part that occurs during this process. Since the machining is performed while checking, the depth of the gap can be known at the time of complete machining, thereby making it possible to obtain a magnetic head with uniform magnetic properties and high durability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the core body, Fig. 2 is a perspective view of the slider, Fig. 3 is a perspective view before processing, and Fig. 4 (-) (4). ) (-) is a plan view showing changes in metal as the spherical surface processing progresses. 4...-Front core, 7...Gap, 12...Slider, 15...Adhesive layer (interlayer part) Applicant: Tokyo Electric Co., Ltd.+r+ti-,・Agent: Akira Aiki 1i L-ji 1・

Claims (1)

[Claims] A slider with a two-layer structure with the thickness of the surface side controlled to a predetermined dimension is fixed to the side of a 70-ton core in which a gap of a predetermined length is formed, and the surfaces of the front core and the slider are made to have a predetermined curvature. A method of machining a magnetic head for a floppy disk, characterized in that the depth of the gap is indirectly controlled while checking the shape of the interlayer part of the slider during machining.