JPH01260606A - Floating magnetic head - Google Patents

Abstract

PURPOSE:To prevent the exudation of glass to a coil winding part by fixing a slider and a core chip and a nonmagnetic plate in a state that the core chip is interposed by the inner circumferential surface of a notch part. CONSTITUTION:The notch part 25 extending to slider pads 22, 23 is formed at one corner of the slider 21, and a slider 21 and the core chip 26 and the nonmagnetic plate 28 are fixed in the state that the core chip 25 is interposed by the inner circumferential surface of the notch part 26. Thus, the core chip 26 can be easily fitted to the inside of the notch part 25 from its side direction, and the exudation of the glass to the coil winding part can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a floating magnetic head used in fixed magnetic disk drives.

Conventional technology Floating magnetic heads used in fixed magnetic disk drives include a monolithic type magnetic head in which a slider forms part of the magnetic path, and a core chip that forms a closed magnetic path by itself, and this core chip is made of non-magnetic material. A composite type floating magnetic head embedded within the slider parapet 1 of the slider is mainly used. Among these, composite type floating magnetic heads in particular have higher mechanical strength than monolithic types, and even if the core width is narrowed in response to the narrower track widths associated with the recent increase in recording density, the core Since it is embedded in a recess formed in the slider and molded with glass, it has the characteristic that the strength of the core is not lost, and its applications tend to expand.

Hereinafter, a conventional example of a monolithic type floating magnetic head will be explained with reference to FIG.

In FIG. 4, 1 is a slider made of a material such as non-magnetic ceramic, and this slider includes slider pads 2 and 3 and a groove 4 sandwiched between the slider pads 2 and 3. There is. Further, sloped surfaces 5 and 6 are formed at one end portion (air inflow end portion) of the slider pads 2 and 3. Note that 7 and 8 are air outflow ends.

A core chip 9 is made of a magnetic material, and is placed in a slit a provided in the slider 1.
It is molded with crow.

Further, as a matter of course, the width of the slit portion 1a is formed to be slightly wider than the width of the core chip 9 in order to facilitate insertion of the core chip 9 into the slit portion.

Problems to be Solved by the Invention In the conventional floating magnetic head configured as described above, the core chip 9 must be vertically inserted into the slit portion la, accurately positioned, and then glass molded. This is because if the core chip 9 is fixed in a tilted state inside the sleeve I/portion 1a, the top surface of the core chip may be shaved diagonally during the subsequent polishing of the top surface of the core chip and the top surface of the slider pad. This is because the width of the magnetic gap, ie, the track width, increases. However, this insertion work is extremely difficult and has been an obstacle to improving work efficiency.

Furthermore, as mentioned above, since the width of the slit is wider than the width of the core chip, a gap is formed between the inner wall of the slit and the core depth, as shown in Figure 5. There is a problem in that the glass 10 used for the mold seeps into the coil winding portion 11 through the gap, making the winding work more troublesome.

Means for Solving the Problems In order to solve the problem described in item 1, the floating magnetic head of the present invention is provided with a notch extending to the slider pad at one corner of the slider, and is machined into a shape that fits within this notch. The slider, the core chip, and the nonmagnetic plate were fixed with the core chip sandwiched between the nonmagnetic plate and the inner peripheral surface of the notch.

Effect With the above configuration, the core chip can be easily installed into the notch from the side, and the core chip and the inner circumferential surface of the notch, as well as the core depth and the non-magnetic plate, can be brought into close contact with each other, thereby preventing the coil winding portion from being attached. This will prevent the glass from seeping out.

EXAMPLE Below, an example of the floating magnetic head of the present invention is shown in FIGS.
This will be explained with reference to FIG.

In the figure, 21 is a slider made of a material such as non-magnetic ceramic, and this slider includes slider pads 22, 23 and a groove 24 sandwiched between the slider pads 22, 23. Further, a notch 25 extending to the slider pad 23 is provided at one corner of the slider 21. A core chip 26 is made of a magnetic material, and is fixed by a crow 27 in a notch 25 provided in the slider 21 with one side 26a of the core chip in contact with an inner circumferential surface 25a of the notch. ing. Reference numeral 28 denotes a plate-shaped member made of the same material as the non-magnetic material forming the slider, and the plate-shaped member is fixed in the notch by glass with one side 28a of the plate-shaped member in contact with one side 26b of the core chip. has been done.

The floating magnetic head of this embodiment configured as described above has the following effects.

That is, since a notch is provided at one corner of the slider, the core chip can be easily inserted into this notch from the side of the notch, as shown in FIG. If the side surfaces of the core depth are formed with high precision, the first effect is that positioning can be completed simply by abutting the side surface of the core depth against the inner circumferential surface of the notch, and the second effect is that the core chip One side surface 26a and one inner circumferential surface 25a1 of the notch, and one side surface 28a of the plate-like member and one side surface 26b of the core chip can be fixed in a bonded state without any gaps, so that the adhesive glass can be attached to the coil winding portion 29. The second effect is that it does not seep into the skin.

Effects of the Invention The present invention provides a notch extending to the slider pad at one corner of the slider, and a core chip is sandwiched between a nonmagnetic plate processed to fit within the notch and the inner peripheral surface of the notch. By fixing the slider, core chip, and non-magnetic plate, the core chip can be easily installed into the notch from the side when manufacturing this floating magnetic head. Since the core chip and the non-magnetic plate can be brought into close contact with each other, it is possible to prevent glass from seeping into the coil winding portion, which is practically effective.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a floating magnetic head according to an embodiment of the present invention, and FIG. 2 is a side view of essential parts of a floating magnetic head according to the same embodiment.
FIG. 3 is an assembled view of the floating magnetic head of the same embodiment, FIG. 4 is a perspective view of the conventional floating magnetic head, and FIG. 5 is a side view of essential parts of the conventional example. 21...Slider,

Claims (1)

[Claims] A notch extending to the slider pad is provided at one corner of the slider made of a non-magnetic material, and a core chip is sandwiched between a non-magnetic plate processed to fit within the notch and the inner peripheral surface of the notch. A floating magnetic head characterized by fixing a slider, a core chip, and a nonmagnetic plate.