JPH0191309A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To improve a degree of close adhesion between a back bar and a core chip, and to improve a magnetic characteristic, and to lower a working cost by assembling a head after making it into the state of a unit by inserting a coil in the core chip and bonding the back bar. CONSTITUTION:At first, a recording/reproducing coil 4a and an erasing coil 4b are inserted in the core chip 1, and next, the back bar 5 is bonded. Next, a holder 2 and the holder 3 are bonded and assembled to the core chip 1, and a slider is constituted. Then, the crevices of the both face sides and the back bar side of the slider are sealed with adhesive, and the sliding surface side of the slider to a medium is ground. Next, a spring 8 is bonded to the slider, and a flexible cable 9 is inserted into a coil terminal 7, and is soldered, and the head is completed. Thus, the degree of close adhesion between the back 5 and the core chip 1 comes good, and the magnetic characteristic is improved, and the working cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a method of manufacturing magnetic l\\rad used for flexible disk drives.

[Prior Art] FIGS. 3(a) and 3(1) are perspective views showing the structure of a conventional magnetic head and a perspective view showing a holder portion thereof. In the figure, C11 is a core chip for recording, playback, and erasing.
and 3 are a first holder and a second holder made of ceramic, 4a is a recording/reproducing coil, 4b is an erasing coil, and 5 and 6 are integrated with the first boulder 2 and the second holder 3. The back bar is made of ferrite.

A conventional magnetic head having the configuration as described above is manufactured by the following manufacturing method. First, the first holder 2 and the second boulder 3 made of ceramic are provided with notches into which the back pars 5 and 6 fit, and then the back pars 5 and 6 made of ferrite are placed in the first holder 2 and the second boulder 3. 2nd boulder; Glue to each notch of 3, core chip l
Polish the contact surface. Next, after inserting the recording/reproducing coil 4a and the erasing coil 4b into the core chip 1, the core chip 1 is sandwiched between the first holder 2 and the second boulder 3, and adhesive is poured into the core chip 1. It solidifies in one piece using a device, etc. At this time, the gaps on both sides A and B and on the back bars 5 and 6 shown in Figure 3(a) are sealed with synthetic resin material to prevent paper dust etc. from entering during the next polishing process. Resulting in. Next, polish the contact surface C of the slider with the medium (not shown) to the required gap depth.

[Problems to be Solved by the Invention] Since the above-mentioned conventional magnetic head is manufactured by the above manufacturing method, the degree of adhesion of the back bar 5.6 to the core chip 1 is poor, and the magnetic properties are impaired. There were some problems, such as: In addition, the back bars 5 and 6 must be inserted into the respective notches of the first holder 2 and the second holder 3, so that the first holder 2 and the second holder 3 and the back bar 5, There is a problem that the straightness of the surface with 6 must be achieved, which increases the processing cost.

This invention was made to solve these problems, and it improves the adhesion between the back bar and the core chip, improves the magnetic properties, lowers the processing cost, and improves the bonding between the slider, spring, and flexible cable. The object of the present invention is to obtain a method for manufacturing a magnetic head that has a structure that is easy to automate assembly and that can be expected to further reduce costs.

[Means for Solving the Problems] A method for manufacturing a magnetic head according to the present invention involves inserting a recording/reproducing coil and an erasing coil into a core chip in advance, and pasting a back bar to form a unit. The first holder and the second holder are assembled by adhesive, and then the gap between the left and right sides and back bar side of the slider that has been adhesively assembled and integrated is fixed with synthetic resin, and then the sliding surface and corner portion of the slider with the medium is fixed. The gap depth is controlled by polishing the eight chamfers, and then the spring and flexible disk are assembled to the slider by gluing.

[Function] In the magnetic head manufacturing method of the present invention, since the back bar is attached to the core chip in advance, the degree of adhesion between them is improved and the magnetic properties are not impaired. Since there is no need to provide notches in the first holder and the second holder, processing costs are reduced, and there is no need to worry about chip damage when attaching springs and flexible cables to the slider. Automatic assembly will be easier, and significant cost reductions can be expected.

[Example Fig. 1 (a) and (+)] are cross-sectional views of a magnetic head produced by a method of manufacturing a magnetic head according to an embodiment of the present invention, as seen from two surfaces; Fig. 1 (c) ) and (d) are plan views of the magnetic head of FIGS. 1(a) and (b), viewed from the sliding surface side with the medium and the coil terminal side. (In this figure, l is the bulk dive core chip for recording/reproducing and erasing, 2 and 3 are the first holder and second holder made of ceramic, 4a is the recording/reproducing coil, and 41) is for erasing. A coil, 5 a back bar made of ferrite of the first holder 2 and second holder 3, 7 a coil terminal, 8 a spring, and 9 a flexible cable.

Next, a method of manufacturing a magnetic head, which is an embodiment of the present invention as described above, will be described. First, a recording/reproducing coil 4a and an erasing coil 4b are inserted into a bulk type core chip l for recording, reproducing, and erasing, and then a back bar 5 is bonded. Next, the first holder 2 and the second holder 3 are assembled using an assembly jig, and the recording/reproducing coil 4a,
The erasing coil IL b and the back bar 5 are adhesively assembled to an integrated core chip l to form a slider.

Next, the gaps on both sides of the integrated slider and the backper 5 are marked with a synthetic resin adhesive to prevent paper dust, etc. from entering during the polishing process. Make it. Next, the sliding surface of the L slider (not shown) is polished to obtain a gap depth, and the four corners are rounded and polished. Next, the spring 8 is bonded to the slider integrated as described above, and the flexible cable 9 is inserted into the coil terminal 7 protruding from the spring 8 and soldered to complete the magnetic head.

In the above embodiment, a manufacturing method in which the back par 5 is bonded to the core chip 1 in advance has been described, but as in another embodiment of the present invention shown in FIG. A similar tapered part may be provided on the first holder 2 to be bonded to the tapered part, and the backper 5 may be inserted and bonded with the slider assembled. Since the back par 5 enters in a wedge shape, there is no problem with the degree of adhesion with the core chip l.

[Effects of the Invention] As explained above, in the method for manufacturing a magnetic head according to the present invention, since the pre-warped backper is bonded to the core chip and left at °C, the adhesion between them is improved and the magnetic properties are not impaired. In addition, since the slider is glued and assembled into one piece, there is less bending of the chip legs and defects, and the assembly of the slider, spring, and flexible cable is easy and automatic assembly is possible.
This makes it easier and has the effect of significantly reducing costs.

Furthermore, since the core chip, recording/reproducing coil, erasing coil, and backper are integrated, it is possible to check the performance of each unit individually, improving the yield of products from the next step onwards in the manufacturing process. It has excellent effects such as:

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) show two magnetic heads manufactured by a magnetic head manufacturing method according to an embodiment of the present invention.
1(c) and (d) are plan views of the magnetic head of FIGS. 1(a) and (b) as seen from the sliding surface side with the medium and the coil terminal side. , FIG. 2 is a sectional view of a magnetic head manufactured by a method of manufacturing a magnetic head according to another embodiment of the present invention, as seen from one surface side, and FIG.
1A and 2B are perspective views showing the configuration of a conventional magnetic head and a perspective view showing a holder portion thereof. In the figure, l... Core chip, 2... First holder, 3... Second holder, 4a... Recording/reproducing coil, 4b... Erasing coil, 5, 6...・Back par, 7...Coil terminal, 8...Spring, 9...
・It is a flexible cable. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 2 1: Core chip. 22 First holder 3: Second holder 4o: Recording, 4 raw coil 5: Back bar 7: Coil S

Claims (1)

[Claims] In a method for manufacturing a magnetic head for a flexible disk drive equipped with recording, reproducing and erasing functions, when bonding a core chip for recording, reproducing and erasing to a first holder and a second holder, the core chip is bonded to the core chip in advance. A recording/reproducing coil and an erasing coil are inserted, a back bar is attached to form a unit, and the first holder and the second holder are adhesively assembled; and the adhesively assembled unit is assembled into a unit. A process of polishing the R-chamfer of the sliding surface of the slider with the medium and the four corners, and adhering the spring to the slider that has been polished and integrated with the R-chamfer, and protruding from the top surface of the spring. A method for manufacturing a magnetic head, comprising the steps of inserting a flexible cable into a coil terminal and soldering the flexible cable.