JPH03116406A - Production of chip for magnetic head - Google Patents

Abstract

PURPOSE:To mass-produce the chips by bonding first and second core blocks, a dummy block and third and fourth core blocks, forming a coil groove symmetrically between the first and second core blocks, between the third and fourth core blocks and on both sides of the dummy block and slicing the material at the azimuth angle. CONSTITUTION:The first and second core blocks 1A and 2A, dummy block 3 and third and fourth core blocks 2C and 1C are bonded by an adhesive 4. The coil grooves 5A and 5E are symmetrically provided to the core blocks 1A and 1C adjacently to the blocks 2A and 2C, and the coil grooves 5B and 5F are symmetrically furnished to the dummy block 3. A sliding gap face 6 is then formed and specularly finished, and the material is sliced at an optional azimuth angle at the center of the dummy block 3 into two chips with the azimuths symmetrical to the center. As a result, the chips for the upper and lower heads are mass-produced in pairs.

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, etc.

[Prior Art] Recently, with the miniaturization of magnetic recording/reproducing devices, higher density recording, and miniaturization of disks, it is known that the S/N ratio deteriorates when a small head is used. To solve this,
It has previously been proposed to set an azimuth angle to the gap (see Japanese Patent Laid-Open No. 57-186222).

Further, 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 angular direction of the azimuth gap between the upper head IO and the lower head 11 needs to be the same with respect to the rotational direction of the disk 90.

[Problems to be Solved by the Invention] Conventionally, it has not been possible to mass-produce the above chips for the upper head 10 and chips for the lower head 11 as a pair.

The present invention provides a chip of the upper head 10 and a lower head l.
This provides a chip manufacturing method suitable for mass production, in which chips for 1 can be manufactured in pairs.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides first to fourth core blocks made of soft magnetic material and dummy blocks made of non-magnetic material, core block and second
A first part serving as a gap is formed between the third core block and the fourth core block, a second part serving as a gap is formed between the third core block and the fourth core block, and a second part serving as 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 such that a dummy block is sandwiched between the core block and the third core block; and a step of joining the first to fourth core blocks and the dummy block; 2nd block
and a second step of forming a winding groove from one side along the direction of the joining surface on the side closer to the third core block, respectively, and a second step of forming a winding groove along the first portion or the second portion. The first to fourth cores are arranged in parallel with a third surface that is perpendicular to the first surface and inclined about the line that is orthogonal to the second surface that reaches each of the winding grooves. A third step of slicing the block and dummy block at multiple locations, and a fourth step of cutting the dummy block so that each winding groove provided in the dummy block is separated from each other, forming a chip. A method of manufacturing a magnetic head chip is characterized in that:

[Example] An embodiment 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. 1(a), a first core block IA, a second core block 2A, a dummy block 3, a third core block 2C, and a fourth core block IC are bonded together using a bonding agent. 4, and the first and fourth core blocks IA
, the IC is provided with winding grooves 5A, 5E symmetrically so as to be in contact with the second and third core blocks 2A, 2C, and the dummy block 3 is also provided with winding grooves 5B, 5F symmetrically. Next, in order to form the sliding gap surface 6, after removing the gap dibs and mirror-finishing the sliding gap surface 6, as shown in FIG. 1(a), the azimuth of the f son By slicing the dummy block 3 at an angle and dividing it symmetrically from the center of the dummy block 3 as shown in FIG. A magnetic head chip shown in FIG. 1(C) and
A chip (not shown) which is symmetrical in the azimuth direction can be formed with this chip.

Reference numeral 7 in FIG. 1(C) 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 IA, 2A described above
, When joining the 2C1IC and the dummy block 3,
In order to form gaps between the first and second core blocks IA and 2A and between the third and fourth core blocks 2051C, sputtering or the like is performed in advance to determine the gap length, or spacers etc. are used during bonding. Determine the gap length by sandwiching the .

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 before with a simple manufacturing process.

[Brief explanation of drawings]

FIGS. 1A, 1B, and 1C are perspective views showing the manufacturing process of a magnetic head chip in an embodiment of the present invention, and FIG. 2 is a schematic view of a floppy disk. 1A: First core block, 2A: Second core block, 2C: Third core block, IC: Fourth core block, 3: Dummy block, 4: Bonding agent, 5A, 5B, 5
E, 5F: Winding groove, 7: Gap. (I7) t( 3A7ξ-70-7

Claims (1)

[Claims] First to fourth core blocks made of soft magnetic material and dummy blocks made of non-magnetic material are prepared, and a gap is provided between the first core block and the second core block. a first part that is a gap between the third core block and the fourth core block, and a second part that is a gap 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 with a dummy block sandwiched therebetween;
The first and fourth core blocks and the second dummy block.
and a second step of forming a winding groove from one side along the direction of the joining surface on the side closer to the third core block, respectively, and forming a winding groove along the first portion or the second portion. The first to fourth cores are arranged in parallel with a third surface that is perpendicular to the first surface and inclined about the line that is orthogonal to the second surface that reaches each of the winding grooves. forming a chip, including a third step of slicing the block and dummy block at multiple locations; and a fourth step of cutting the dummy block so that the winding grooves provided in the dummy block are separated from each other. A method of manufacturing a chip for a magnetic head, characterized in that: