JPH0377567B2 - - 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] FIGS. 2a and 2b show a conventional method of manufacturing a chip for a magnetic head, and FIG. 3 shows a completed diagram of the conventional magnetic head.

Conventionally, as shown in FIG. 2a, between a first core block 1 made of a magnetic material such as ferrite and having a substantially U-shaped cross section, and a dummy block 3 made of a non-magnetic material and having a substantially U-shaped cross section, After simultaneously bonding the first core block 1, second core block 2, and dummy block 3 using a bonding agent 4 such as glass, sandwiching the second core block 2 made of the magnetic material and having a substantially I-shaped cross section, As shown in Figure 2 b, step (change this position from A to ← A in Figure 2 a).
A large number of magnetic head chips were obtained by crazing (shown in ). In FIG. 3, a recording/reproducing head 11 having a recording/reproducing gap 9, an erasing head 12 having erasing gaps 10, 10',
12' is formed by the above manufacturing method,
A magnetic head is shown in which erasing heads 12, 12' are bonded to both sides of the recording/reproducing head 11 via a bonding agent 4' such as glass, and windings 13, 13' are provided.

[Problems to be Solved by the Invention] Conventionally, as shown in FIG. Chips for heads could not be manufactured.

The present invention solves the above-mentioned problems and provides a method for manufacturing magnetic head chips that can efficiently mass-produce magnetic head chips.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides the following: first to fourth core blocks made of soft magnetic material and dummy blocks made of non-magnetic material; A first part forming a gap is formed between the third core block and the second core block, a second part forming a gap is formed between the third core block and the fourth core block, and a second part 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 core block and the third core block, and a second step of joining the first to fourth core blocks and the second dummy block. and a second step of forming winding grooves from the same side along the above-mentioned joint surface on the sides closer to the third core block, respectively, and forming the first portion to become the gap and the second portion to form the gap. a step of slicing the first to fourth core blocks and the dummy block in parallel at a plurality of locations so as to intersect with each plane along each section and include the winding groove; This method of manufacturing a chip for a magnetic head is characterized in that the chip is formed by cutting a dummy block so that the winding grooves of the dummy block are separated from each other.

[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 FIGS. 1a and 1c, a first core block 1A, a second core block 2A, a dummy block 3, a third core block 2C, and a fourth core block 1C are bonded using a bonding agent 4. , the first and fourth core blocks 1A, 1C are 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
Winding grooves 5B and 5F are also provided symmetrically. 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. symmetrically from the first
Either it is divided as shown in Figure b and then sliced (the dummy blocks after division are indicated by symbols 3A and 3C), or it is sliced as shown in Figure 1c and then the dummy block 3 is divided into parts as shown in Figure 1d. By dividing the chip symmetrically as shown in FIG. 1, a chip for a magnetic head shown in FIG. 1e can be formed.

Reference numeral 7 in FIG. 1e indicates a gap, which becomes a recording/reproducing gap or an erasing gap depending on the difference in 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.

In addition, as locations for forming the winding grooves 5A, 5B, etc. in the above embodiment, the winding grooves 5A, 5B were formed so as to be in contact with the dummy block 3 and from the first core block 1A side to the second core block 2A side. , first core block 1A and second core block 2A
Even if a winding groove including a joint between the two ends of the winding groove is formed, the same effect as in the above embodiment can be obtained.

[Effects of the Invention] The present invention is as described above, and has the effect that a larger number of magnetic head chips can be produced than in the past through a simple manufacturing process.

[Brief explanation of drawings]

Figures a, b, c, d, and e in Figure 1 are perspective views showing the manufacturing process of a magnetic head chip according to an embodiment of the present invention, and Figures 2a and b are perspective views showing the manufacturing process of a conventional magnetic head chip. The illustrated perspective view, FIG. 3, is a perspective view of a conventional magnetic head. 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 wire, intersecting with the respective planes along the first portion and the second portion forming the gap, and forming winding grooves from the same side. A step of slicing the first to fourth core blocks and the dummy block in parallel at multiple locations so as to include the grooves, and slicing the dummy block so that the two winding grooves provided in the dummy block are separated from each other. 1. A method for producing a chip for a magnetic head, comprising the step of cutting the chip to form a chip.