JPH0377566B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a chip for a magnetic head such as a floppy disk for office computers, personal computers, and the like.

[Prior Art] Recently, with the miniaturization of magnetic recording and reproducing devices, the increase in recording density, and the miniaturization of disks, it is known that the S/N ratio deteriorates when a small head is used. To solve this problem, it was previously proposed to add an azimuth angle to the gap (Japanese Unexamined Patent Publication No. 1986-
(Refer to Publication No. 186222).

The floppy disk currently in use has an upper head 10 and a lower head 11 on both sides of the disk 9, as shown in FIG. Further, in this case, the angle direction of the azimuth gap between the upper head 10 and the lower head 11 needs to be the same with respect to the direction of rotation of the disk 9.

[Problem to be solved by the invention] By the way, in the past, the upper head 1 as described above
It was not possible to mass produce the chip for 0 and the chip for lower head 11 as a pair.

The present invention provides a chip manufacturing method suitable for mass production, in which the chip for the upper head 10 and the chip for the lower head 11 can be manufactured in pairs.

[Means for Solving the Problems] In order to solve the above problems, the present invention includes first to fourth core blocks made of soft magnetic material,
Prepare a dummy block made of non-magnetic material, and
A first portion forming a gap is formed between the core block and the second core block, a second portion forming a gap is formed between the third core block and the fourth core block, and a second portion forming a gap is formed between the third core block and the fourth core block. a first step of joining the first to fourth core blocks and the dummy block with a dummy block sandwiched between the second core block and the third core block; and a step of joining the first to fourth core blocks and the dummy block; a second step of forming winding grooves from the same side along the joining surface on the sides closer to the second and third core blocks, respectively; The first to fourth core blocks and dummy blocks are placed at a plurality of locations parallel to a surface that intersects with the first surface and includes each of the winding grooves, excluding a surface that is orthogonal to the first surface. The method includes a third step of slicing across the dummy block, and a fourth step of cutting the dummy block so that the two winding grooves provided in the dummy block are separated from each other to form a chip. This is a method for manufacturing a magnetic head chip.

[Example] An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a method of manufacturing a magnetic head chip according to the present invention.

As shown in FIG. 1a, the first core block 1
A, the second core block 2A, the dummy block 3, the third core block 2C, and the fourth core block 1C are bonded with a bonding agent 4, and the first and fourth core blocks 1A, 1C are 2nd and 3rd
Winding grooves 5A, 5E are provided symmetrically so as to be in contact with the core blocks 2A, 2C, and winding grooves 5B, 5F are also provided symmetrically in the dummy block 3. Next, in order to form the sliding gear surface 6, the depth of the gear is removed and the sliding gear surface 6 is polished to a mirror finish, and then an arbitrary azimuth angle is set as shown in FIG. 1a. The dummy block 3 is sliced and divided symmetrically from the center of the dummy block 3 as shown in FIG.
A and 3C), it is possible to form the magnetic head chip shown in FIG. 1c and a chip (not shown) whose azimuth direction is symmetrical to this chip.

Reference numeral 7 in FIG. 1c is a gap, which can be a recording/reproducing gap or an erasing gap depending on the track width.

Note that the first to fourth core blocks 1 described above
When joining A, 2A, 2C, 1C and the dummy block 3, the first and second core blocks 1A,
2A, and the third and fourth core blocks 2C, 1
In order to form a gap between C, sputtering or the like is applied in advance to determine the gap length, or the gap length is determined by inserting a spacer or the like during bonding.

Further, as the bonding agent 4 described above, low melting point glass or an adhesive can be used.

[Effects of the Invention] The present invention is as described above, and has the advantage that more pairs of chips for the upper head and chips for the lower head of a floppy disk can be obtained in pairs than in the past through a simple manufacturing process.

[Brief explanation of drawings]

1a, b, and c are perspective views showing the manufacturing process of a magnetic head chip in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a floppy disk. 1A: first core block, 2A: second core block, 2C: third core block, 1C: fourth core block, 3: dummy block, 4: bonding agent, 5A, 5B, 5E, 5F: winding groove, 7: Gap.

Claims (1)

[Claims] 1. First to fourth core blocks made of a soft magnetic material and a dummy block made of a non-magnetic material are prepared, and a gap is formed between the first core block and the second core block. A gap is formed between the third core block and the fourth core block, and a dummy block is formed between the second core block and the third core block. a first step of joining the first to fourth core blocks and the dummy block in a sandwiching manner; a second step of forming winding grooves from the same side along the planes of the winding grooves; intersecting the first plane along the first portion and the second portion and including each of the winding grooves; a third step of slicing the first to fourth core blocks and the dummy blocks at multiple locations parallel to the surface excluding the surface orthogonal to the first surface; 1. A method for manufacturing a chip for a magnetic head, comprising: a fourth step of cutting a dummy block so that individual winding grooves are separated from each other to form a chip.