JPS63173209A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To omit an end face grinding work of a core block CB for measuring the depth by opposing both CBs so that a side end face of a C type CB projects from a side end face of an I type CB and executing glass bonding, at the time of joining the C type core block CB and the I type CB. CONSTITUTION:A C type CB 21 whose cross section is a C type, and an I type CB 22 whose depth dimension is shorter than the depth dimension of the C type CB 21 and whose cross section is an I type are prepared, both the CBs are opposed so that a side end face 21a of the C type CB 21 projects from a side end face 22a of the I type CB 22, and in a gap formed part, a spacer 23 of a non-magnetic material is interposed, and both the CBs are brought to bonding by glass 24. In such a way, in both the CBs which have been joined, even if bonding glass protrudes a little in a step difference part 25, the depth can be known easily by measuring the dimension D of a gap formed surface 21b of the projected part of the C type CB 21, and a grinding work of the side end face of the CB for measuring the depth can be omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a magnetic head for reading and writing data on a magnetic medium such as a flexible magnetic disk.

Conventional technology First, the structure of the magnetic head will be explained with reference to FIG.

As shown in this figure, the magnetic head includes a first magnetic core 1 formed in an L shape and made of a magnetic material, and a first magnetic core 1 formed in an L shape.
and a second magnetic core 2 made of an I-shaped magnetic material fixed through a gap portion 3, a coil 4 wound around the body portion 1a of the first magnetic core 1, and the two magnetic cores. It is comprised of a backper 5 that connects the rear ends of 1 and 2 to form a magnetic path. When the magnetic flux generated in the coil 4 flows through the magnetic core 1.degree.2 by energizing the coil 4, the magnetic flux leaking from the gap portion 3 magnetizes the magnetic medium.

Next, the process of manufacturing the core chip of the magnetic head will be explained. FIG. 3 shows the conventional manufacturing process.

First, as shown in FIG. 3(a), a spacer 1 made of a non-magnetic material is placed between a core block 11 having a C-shaped cross section and a core block 12 having an I-shaped cross section, which are formed to have the same depth dimension A.
3 are placed on both sides of the core blocks, and glass bonding of both core blocks is performed using glass 14. After that, in order to manage the depth of the gap part, the hatched part in the same figure (b),
That is, the end face 15 is polished. This is because when the glass is filled in the step shown in FIG. 3(a), the glass protrudes into the end face 15, making it difficult to measure the depth of the gap. Then, (b) cut at the A-A section in the figure (or grind to the A-A section) to form the shape shown in the (C) figure, and then cut to the specified size to make the core chip. You get it.

Problems to be Solved by the Invention However, as described above, if the side end surfaces are not polished once the two core blocks are joined, the depth cannot be controlled due to the glass protruding to the sides, which is troublesome. It was something.

Means for Solving the Problems Therefore, in the method of manufacturing a magnetic head of the present invention, when joining a C-shaped core block and an L-shaped core block, the side end surface of the C-shaped core block is lower than the side end surface of the L-shaped core block. Glass bonding is performed with both core blocks facing each other so that they protrude.

Effect By glass bonding both core blocks as described above, a portion of the C-shaped core block that determines the depth is exposed.

EXAMPLE Hereinafter, one example of the method for manufacturing a magnetic head of the present invention will be described as a first example.
This will be explained with reference to the figures.

First, a C-shaped core block 21 having a C-shaped cross section and an L-shaped core block 22 having an I-shaped cross section, which is shorter than the depth X of this C-shaped core block 21, are prepared. As shown in Figure (a), the C-shaped core block 21 is opposed to each other so that the side end surface 21a protrudes from the side end surface 22a of the L-shaped core block 22, and a non-magnetic spacer 23 is placed in the gap forming part. Both core blocks are bonded with glass 24 interposed therebetween. In both core blocks joined in this way, the stepped portion 2
Even if the bonding glass protrudes to some extent in 5, the depth is still the same as the gap forming surface 21 of the protruding part of the C-shaped core block.
This can be easily determined by measuring the dimension b.

Therefore, it is possible to omit the polishing work of the side end surface of the core block, which was conventionally done to measure the depth.

After this step, cut at the A-A section (or A
-A part) to form the shape shown in FIG. 3(b), and then cut to a predetermined size to obtain a core chip.

As described in detail, the magnetic head manufacturing method of the present invention eliminates the polishing work of the end face of the core block for depth measurement, which was conventionally performed after joining the C-type core block and the L-type core block. This has the effect of being omissible and reducing the number of man-hours.

[Brief explanation of the drawing]

FIG. 1 is a main process diagram of the method for manufacturing a magnetic head of the present invention;
FIG. 2 is a side view of the magnetic head, and FIG. 3 is a diagram showing the main steps of a conventional magnetic head manufacturing method. 21...C-type core block, 22...L-type core block, 21a...Side end surface of C-type core block 21, 2
2a... Side end surface of the l-shaped core block 22, 23
・・・・・・Non-magnetic spacer, 24・・・Glass, Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2

Claims (1)

[Claims] A C-shaped core block with a C-shaped cross-section and an I-shaped core block with a C-shaped cross-section.
When bonding I-shaped core blocks, glass bonding is performed with both core blocks facing each other so that the side end surface of the C-shaped core block protrudes from the side end surface of the I-shaped core block. Head manufacturing method.