JPH02306484A - Floating operation method for floating magnetic head structure - Google Patents

Abstract

PURPOSE:To attain the recording/reproducing tasks with high density by applying individually the pressing force set against the lift acting on the floating surfaces of the 1st and 2nd slider parts respectively to a pressure applying point set at an approximately center position between the support parts of both slider parts. CONSTITUTION:A floating surface 13 of a 1st slider part SLD1 protrudes over a floating surface 14 of a 2nd slider part SLD2 and at the same time floats over the surface of a magnetic recording medium. Then the pressing force is set at the support parts 18 and 19 of the SLD1 against the lift acting on the surface 13 so that the height of the recording medium surface is set at about 0.05mu on the surface 13 when the distance between the top and bottom parts is set at about 0.5mu on the recording medium surface. At the same time, the pressing force is set against the lift acting on the surface 14 of the SLD2 at a pressure applying point P set at an approximately center position of the SLD2 so that the surface 14 is set at >=0.15mu over the recording medium surface. In such a constitution, the recording/reproducing tasks are attained with high density.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for flying a flying magnetic head assembly suitable for high-density magnetic recording and reproducing.

(Prior Art) In a magnetic recording medium disk (magnetic disk) recording and reproducing device, in order to stably record and reproduce signals without damaging the surface of the magnetic recording medium, it is necessary to Conventionally, when reproducing information signals from a magnetic disk, the magnetic head is used in a state in which the magnetic gap part of the magnetic head is suspended at a predetermined minute distance from the surface of the magnetic recording medium. It is commonly practiced.

Also, to prevent the flying height of the magnetic head from changing significantly due to surface runout that occurs during rotation of the magnetic disk, or to facilitate contact start/stop operations and load/unload operations. For example, as disclosed in Japanese Patent No. 44-18667, the surface of the magnetic recording medium is lifted by the lift force generated on the air bearing surface of the slider section by a thin layer of gas flow between the surface of the magnetic recording medium and the air bearing surface of the slider section. The slider is provided with two sliders, a parent slider and a child slider equipped with a magnetic head, each of which can be brought into a flying state above the slider, to reduce fluctuations in the flying height of the slider and ensure a stable flying height of the slider.
A parent-child type flying magnetic head device (see FIG. 19) has been proposed in which vibration and resonance induced in the slider support mechanism by disturbances can be suppressed to ensure stable flying operation.

In FIG. 19, 2 and 2.2 are three discs each having a diameter of 25 mm and serve as the air bearing surface of the parent slider 1. The magnetic disk is curved in such a way that its center protrudes toward the opposing magnetic disk surface, and is rotated at 1,600 to 2,400 revolutions per minute. Three air bearing surfaces 2, 2.2 of slider 1
-6 = Due to the lifting force generated, the three air bearing surfaces of the group slider 1 are 2゜2,
A pressing force is applied to the group slider 1 in the direction of the surface of the magnetic recording medium so that the slider 2 floats about 30 microns above the surface of the magnetic recording medium.

The child sliders 4, 4.4 are connected to the group slider 1 by a pair of leaf springs 3, 3, respectively, and each child slider 4, 4.4 is provided with a plurality of magnetic heads. ing. The child slider 4°4.4 has a diameter of 35 cm and rotates at 1600 to 2400 revolutions per minute as described above.
The thin layer of gas flow on the magnetic recording medium surface of the magnetic disk floats above the magnetic recording medium surface due to the lift force generated on the air bearing surface formed on the lower surface of the child slider 4.
The flying height is approximately 2 to 2.5 microns under the condition that a pressing force of 10 to 15 grams is applied to the back surface of the child slider 4, 4.4 by each pair of leaf springs 3, 3 described above. Ru.

Next, FIG. 20 shows a parent-child type floating magnetic head device as exemplified in Japanese Patent Application Laid-Open No. 62-99967, and the parent-child type floating magnetic head device shown in FIG. By connecting the child slider 7 to the family slider 5 by a support mechanism constructed using a viscoelastic membrane 6, mechanical resonance is prevented from occurring in the support mechanism, and the parent-child slider 7 is connected to the slider 5 as shown in FIG. This is a type of floating magnetic head device that can operate in a stable floating state.

In addition, FIG. 22 shows that in the parent-child type floating type magnetic head device illustrated in FIG. In order to improve the problem that the floating operation becomes unstable due to the inconsistency in the application point of the pressing force applied to the child slider 7 due to the connection, a viscoelastic film 9 is attached to the group slider 8. By connecting the child slider 10 using the support mechanism constructed using the above-mentioned method, mechanical resonance is not generated in the support mechanism, and the tip of the plate-like member 11 can be pressed at a predetermined point on the back surface of the child slider 10. This is a parent-child type floating magnetic head device configured to apply pressure.

(Problems to be Solved by the Invention) 17= By the way, in conventional parent-child type floating magnetic head devices including the parent-child type floating magnetic head devices illustrated in FIGS. 19 to 22, From the viewpoints of stable running operation of the magnetic head on the magnetic recording medium surface of a magnetic disk that is being driven and rotated with vibration and elimination of mechanical resonance in a floating magnetic head device, we developed a parent-child type floating magnetic head device. Generally, efforts are being made to improve the functionality of head devices, and in order to achieve high-density recording and reproducing, which has become particularly necessary in recent years, floating magnetic heads are brought extremely close to the magnetic recording medium surface of magnetic disks. Until now, the idea of raising the surface stably in a suspended state had never occurred.

The above point will be made clear through the explanation of the contents of the conventional example.

First, in the conventional parent-child type flying magnetic head device shown in Fig. 19, the flying surface 2゜2.2 of the group slider 1 is composed of three disks each having a diameter of 25 mm, and the device as a whole is large. However, the floating amount of the child slider at 4°4.4 is a large value of about 2.5 microns, and it is not a device that can perform high-density recording, but because the device is large as mentioned above. It is difficult to increase the access speed for movement between tracks, and therefore some kind of response is required to increase the access speed, as has recently been the case.

As mentioned above, the child slider 4 levitates by 2 to 2.5 microns above the magnetic recording medium surface of the magnetic disk under a pressing force of 10 to 15 grams applied to it by the leaf spring 3. If the floating state of the parent and child sliders is unstable and a part of the child slider 4 comes into contact with the magnetic recording medium surface of the magnetic disk due to an external mechanical shock, etc., 10 to 15 Since the slider 4 to which a large pressing force of gram is applied may instantly destroy the magnetic recording medium surface of the magnetic disk, in the conventional device shown in FIG. 19, the child slider 4 is It is necessary to levitate the magnetic disk at a distance of 2.5 microns from the magnetic recording medium surface of the magnetic disk to prevent the above-mentioned destruction of the magnetic recording medium surface of the magnetic disk. Therefore, it was not possible to reduce the flying height.

And, as mentioned above, the large floating height means that
This means that the recording density is low, so when there is a strong demand for compact, large-capacity recording and reproducing devices as in recent years, it is necessary to reduce the flying height to realize high-density recording. means are needed.

Further, the conventional parent-child type floating magnetic head device shown in Fig. 19 is used for a solid magnetic disk in which the magnetic disk does not deform even when the magnetic head comes into contact with the magnetic disk being recorded or reproduced. When the conventional parent-child type floating magnetic head device shown in Fig. 19 is used for a flexible magnetic recording medium, the weight of the magnetic head device is reduced. is too large and the magnetic recording medium cannot rotate, or even if the magnetic recording medium can rotate, the amount of sinking of the magnetic recording medium surface is too large and the relationship between the air bearing surface 2 of the parent slider 1 and the magnetic recording medium surface is Since the curvatures of the opposing portions are greatly different, it is considered that good floating operation cannot be expected.

But not only solid magnetic disks.

For example, a floating magnetic head that can be used effectively for flexible magnetic recording media in the form of sheets, tapes, and other shapes is useful for magnetic recording and reproducing devices, and a floating magnetic head with such a function is useful for magnetic recording and reproducing devices. Its appearance was eagerly awaited.

Now, in the conventional parent-child type flying magnetic head device shown in FIG.
Each pair of leaf springs 3.3 is supported as a cantilever beam, but now.

When the cantilevered leaf spring 3 supporting the child slider 4 on the parent slider 1 is implemented as one piece as shown in Fig. 23, and when two parallel leaf springs 3, 3 are used as shown in Fig. 24.
Let's consider the case where it is carried out using .

First, in (,) in Figure 23, child slider 4 is moved to parent slider 1.
When there is only one leaf spring 3 used as a cantilever to support the parent and child sliders 1.
23 is a diagram showing a state where a is floating a predetermined distance from the magnetic recording medium surface of a magnetic disk D, and
(b) of the figure illustrates a state in which the parent slider 1 has descended from the flying state shown in (a) of FIG. 23 and its flying surface 2 has approached the magnetic recording medium surface of the magnetic disk D. are doing.

As mentioned above, when the parent slider 1 is lowered from the floating state shown in (,) in FIG. 23 and its floating surface 2 is brought close to the magnetic recording medium surface of the magnetic disk D. The descending motion of the parent slider 1 is transmitted to the child slider 4 via the spring plate 3, and the child slider 4 also descends, but in this state, the magnetic recording medium surface and the air bearing surfaces 2 and 4a of the parent and child sliders 1°74 are lowered. The air bearing surface 2 of the parent and child sliders 1 and 4 is created by the thin layer gas flow between the air bearing surfaces of the parent and child sliders 1 and 4.
, -4 Due to the lift force generated at a, the parent and child sliders 1,
The floating surfaces 2 and 4a of the child slider 4 attempt to return to the original floating state shown in FIG. One end of the flying surface 4a of the child slider 4, which is moved in the direction of contacting the magnetic recording medium surface of the magnetic disk D and is thereby applied with a large pressing force, collides with the magnetic recording medium surface, causing the magnetic recording medium surface of the magnetic disk D to collide with the magnetic recording medium surface. It may also happen that it is destroyed.

Next, in FIG. 23(c), the parent slider 1 rises from the floating state shown in FIG. 23(a), and its flying surface 2 separates from the magnetic recording medium surface of the magnetic disk D. In this state, the child slider 4
Because the child slider 4 descends with its head bowed to the fulcrum of the spring plate 3, one end of the floating surface 4a of the child slider 4 collides with the magnetic recording medium surface of the magnetic disk D, causing the magnetic recording of the magnetic disk D to be interrupted. Although the medium surface may be destroyed, it is natural that such a phenomenon is more likely to occur as the form of the child slider 4 becomes larger.

In the conventional parent-child type flying magnetic head device shown in FIG. 19, the optimal flying height of the child slider 4 is said to be 2 to 2.5 microns, partly because the device is large in shape as described above. However, in order to perform even higher density recording, it is necessary to lower the flying height of the child slider 4 by more than an order of magnitude than the above-mentioned flying height. In order to lower the flying height of the child slider 4 by more than an order of magnitude than the above-mentioned flying height and maintain a stable flying state, it is necessary to change the size and configuration of the parent-child type flying magnetic head device. This is easy to understand.

・Next, in the conventional parent-child type floating magnetic head device shown in FIG. Let us consider the case where this is implemented using two parallel leaf springs 3°3.

First, in (a) of FIG. 24, child slider 4 is moved to parent slider 1.
The floating surfaces 2 of both the parent and child sliders 1 and 4 are supported by two parallel leaf springs 3 used as cantilevers.
, 4a are floating a predetermined distance from the magnetic recording medium surface of the magnetic disk D, and FIG. 24(b) is the same as that shown in FIG. 24(a) above. 24(c) is a state in which the parent slider 1 is rising from the floating state shown in FIG. 24(a). It shows.

As mentioned above, two leaf springs 3 are used as cantilevers to support the child slider 4 on the parent slider 1.
operates as a parallelogram link, so even if the flying height of the parent and child sliders 1 and 4 from the magnetic recording medium surface of the magnetic disk D changes, the flying surface 4a of the child slider 4 will remain on the magnetic recording medium of the magnetic disk D. remains parallel to the plane.

However, when the flying height of the child slider 4 changes from the normal flying height shown in (,) in Fig. 24, to (b) in Fig. 24,
When the flying height changes to the state shown in (c), the position of the child slider 4 changes by ΔQ in the direction in which the recording trace extends.
As a result, the relative velocity between the magnetic head and the magnetic recording medium surface changes in response to the fluctuation in the flying height, producing a jitter component, which is observed as noise in the eye pattern of signal reproduction.

The displacement state of the child slider 4 described above is based on the magnetic disk D.
As shown in FIG. 24(d), the state of displacement of the child slider 4 is not the degree of freedom in the direction perpendicular to the magnetic recording medium surface of the magnetic disk D. A composite vector A is a vector sum of a component of the flying height Y in a direction perpendicular to the flying height Y and a change in position Δa in the extending direction of the recording trace.

By the way, in the above-mentioned floating operation of the child slider 4, only a degree of freedom is required that can cause a displacement Y corresponding to a change in the flying height only in the direction perpendicular to the magnetic recording medium surface of the magnetic disk D. It is not desirable that a positional change ΔQ occurs in the extending direction of the recording trace in response to fluctuations in the flying height of the child slider 4, and a countermeasure for this is required.

Now, in the conventional parent-child type floating type magnetic head device shown in FIG. However, the child slider 4 is shown in (a) of Fig. 25.
As shown in , when the magnetic disk D is being moved in the direction of the arrow X and is floating due to the lifting force Y' generated on the flying surface 4a of the child slider 4 by the thin layer gas flow on the magnetic recording medium surface. The child slider 4 is subjected to the aforementioned lifting force Y' and the force X' due to the thin layer gas flow on the magnetic recording medium surface of the magnetic disk D.

The child slider 4, to which the above-mentioned lift force Y' and the force X' due to the thin layer gas flow are applied, is supported at the linear support point PD by the leaf spring 3 on its negative side wall. In the child slider 4, one end of the child slider 4 approaches the surface of the magnetic recording medium due to the resultant force of the lifting force Y'' and the force X' caused by the thin layer gas flow being applied to the support point P. The other end of the child slider 4 is separated from the magnetic recording medium surface so that the air bearing surface 4a faces the magnetic recording medium surface in a non-parallel manner, as shown in FIG. 25(a). However, having this tendency means that the child slider 4 sometimes comes into contact with the magnetic recording medium surface of the magnetic disk D and destroys the magnetic recording medium surface.

FIG. 25(b) is a diagram showing the state of FIG. 25(a) viewed from above, and as can be seen from FIG. 25(b), the parent-child type floating type magnetic In the head device, a force in the direction of the child slider 40 width is not applied to a dotted support point but to a linear support point PQ.

Therefore, even when there is a vibration component of the magnetic recording medium surface of the magnetic disk in the direction of V in the figure, it only moves in the Y direction (up and down) at the support point PQ in the width direction of the leaf spring 3.
When the component of the deflection of the magnetic recording medium surface of the magnetic disk in the direction of V in the above-mentioned figure is large, one edge of the child slider 4 in the direction of V approaches the magnetic recording medium surface of the magnetic disk, and in some cases, It also happens that one edge of the child slider 4 in the V direction comes into contact with the magnetic recording medium surface of the magnetic disk, thereby destroying the magnetic recording medium surface of the magnetic disk and the magnetic head of the child slider.

The above-mentioned problems can be solved by using (c) in FIG.
This problem can be solved by applying a pressing force to a portion P corresponding to approximately the center point of the surface of the child slider 4 shown in ) and (d), respectively.

For example, Japanese Patent Laid-Open No. 62-99967 has proposed a parent-child type floating magnetic head device that eliminates the drawbacks described in the above-mentioned parent-child type floating magnetic head device shown in Fig. 19. Publication, JP-A-62-
There is a parent-child type floating type magnetic head device disclosed in Japanese Patent Laid-Open Nos. 167681 to 167683, etc., and
The parent-child type floating magnetic head device shown in FIG. 20 as an example configuration of the parent-child type floating magnetic head device exemplified in Publication No. 2-99967 has a parent-child type floating magnetic head device in which the parent slider 5 is attached as described above. On the other hand, by connecting the child slider 7 with a support mechanism constructed using a viscoelastic membrane 6, mechanical resonance is prevented from occurring in the support mechanism, and a parent-child type float is constructed as shown in FIG. The type 2 magnetic head device is designed to operate in a stable floating state of −19=. First, in the parent-child type floating magnetic head device illustrated in FIG. Since a support mechanism constructed using an elastic membrane 6 is adopted, resonance of the mechanical system can be well suppressed by the viscoelastic membrane 6, which has a large mechanical resistance, so it is possible to follow vertical motion components up to a high frequency band. However, since the viscoelastic film 6 has the property of extending in any three-dimensional direction, the parent-child type floating magnetic head device illustrated in FIG. 20 can be rotated at high speed. When the magnetic disk D is levitated above the magnetic recording medium surface of the magnetic disk D as shown in FIG. In the state where the child slider 7 is floating due to the lift force Y' generated on the air bearing surface 7a, the child slider 7 is subjected to the above-mentioned lift force Y' and the force of the magnetic disk D, as illustrated in FIG. 26(b). A force X'' due to the thin layer gas flow on the surface of the magnetic recording medium is applied.

The child slider 7, to which the combined force of the above-mentioned lifting force Y'' and the force X' due to the thin layer gas flow is applied, is displaced from the imaginary line position shown in FIG. 26(b) to the solid line position. The magnetic disk D is displaced by 80 degrees in the moving direction, and the air bearing surface 7a becomes inclined by θ with respect to the magnetic recording medium surface of the magnetic disk D, and one end of the child slider 7 approaches the magnetic recording medium surface. However, the other end of the child slider 7 is separated from the magnetic recording medium surface, and the air bearing surface 7a is not parallel to the magnetic recording medium surface, as shown by the solid line in FIG. 26(b). They will now face each other.

Next, a second example of the configuration of a parent-child type floating type magnetic head device illustrated in Japanese Patent Application Laid-Open No. 167681/1981 will be described.
The parent-child type floating magnetic head device shown in Figure 2 is
After connecting the child slider 10 to the parent slider 8 by a support mechanism configured using a viscoelastic membrane 9 to prevent mechanical resonance from occurring in the support mechanism, the child slider 10 is This parent-child type floating type magnetic head device is configured to apply a predetermined pressing force to one point on the back surface of the parent-child type floating type magnetic head device shown in FIG. When the parent-child type floating magnetic head device having the above configuration is performing a flying operation, the child slider 7 is displaced from the imaginary line position shown in FIG. 26(b) to the solid line position, and the magnetic disk is Δ in the moving direction of D
At the same time, the air bearing surface 7a is displaced by the magnetic disk D.
By connecting the child slider 10 to the parent slider 8 using a support mechanism constructed using a viscoelastic film 9, the support mechanism can be improved. In addition to preventing mechanical resonance from occurring, by configuring the tip of the plate-like member 11 to apply a predetermined pressing force to one point on the back surface of the child slider 10, the child slider 10 can be maintained even during the floating operation. The inclination angle between the air bearing surface and the magnetic recording medium surface of the magnetic disk D is determined by the solid line shown in FIG. 26(b) for the child slider 7 in the parent-child type flying magnetic head device shown in FIG. The inclination angle can be made smaller than the inclination angle θ.

However, even in the parent-child type floating magnetic head device shown in FIG. 22, the child slider 10 moves Δ
It is not possible to prevent the displacement by Q, and therefore, the above-mentioned displacement Δ
Due to the existence of Q, in addition to the two degrees of freedom in one other direction, there are three degrees of freedom including the already mentioned angle O, which poses a problem in terms of stability.

As is clear from the descriptions so far with reference to FIGS. 19 to 26, in conventional parent-child type floating magnetic head devices, the purpose of achieving stable running and eliminating mechanical resonance is As a result, a relatively large flying gap was stably formed on the magnetic recording medium surface of a magnetic disk, so it was not suitable for realizing high-density recording. With the increasing need for compact, large-capacity magnetic recording and reproducing devices, technology has been developed to enable high-density recording and reproducing operations by levitating a magnetic disk at a position much closer to the magnetic recording medium surface than before. was required to appear.

(Means for Solving the Problems) 23- The present invention is capable of floating above the surface of the magnetic recording medium by the lift force generated on the flying surface of the slider section by a thin layer of gas flow between the surface of the magnetic recording medium and the flying surface of the slider section. The first slider in the floating magnetic head structure is composed of two slider parts, a first slider part and a second slider part, and the first slider part is equipped with a magnetic head. The part is supported by the second slider part by a support part that is capable of linear movement only in a direction substantially perpendicular to the direction of the air bearing surface of the second slider part, and the air bearing surface thereof is aligned with the surface of the magnetic recording medium. The second slider section is displaced corresponding to the peaks and valleys of the surface roughness in such a manner that it can pass near the top of the peaks and above the valleys of the peaks and valleys of the surface roughness. At a height set above the top of the peaks and troughs of the surface roughness, the air bearing surface of the magnetic recording medium is maintained in a position that correctly faces the surface of the magnetic recording medium in response to the surface runout of the surface of the magnetic recording medium. The distance between the magnetic recording medium surface and the air bearing surfaces of the first and second slider sections is such that the above-mentioned first and second slider sections are displaced as shown in FIG. The first method described above is achieved by a thin layer gas flow.
and a pressing force that resists the lift force acting on the floating surface of the second slider section, respectively, to a pressurizing point set approximately at the center of the support section of the first slider section and the second slider section. The present invention provides a method for floating a floating magnetic head structure in which the floating magnetic head structures are provided individually.

(Function) The first slider section and the first slider section can each be brought into a flying state above the magnetic recording medium surface by the lift force generated on the air bearing surface of the slider section by a thin layer of gas flow between the magnetic recording medium surface and the air bearing surface of the slider section. Comparing the above-mentioned first slider section with the air bearing surface of the floating magnetic head structure, which is composed of two slider sections and the above-mentioned first slider section is equipped with a magnetic head. The second slider section is supported by a support section that allows linear movement only in a direction substantially perpendicular to the direction of the air bearing surface in the second slider section that has a large air bearing surface, and the surface of the magnetic recording medium is The above-mentioned first and second sliders 96 = resist the lift forces acting on the air bearing surfaces of the first and second slider sections, respectively, due to the thin layer gas flow between them and the air bearing surfaces of the rider sections. The pressing force applied to the support part of the first slider part and the pressurizing point set approximately at the center of the second slider part, respectively, is greater than the pressing force applied to the first slider part. The pressing force applied to the second slider portion is smaller, and the value of the pressing force per unit area of the pressing force applied to the first slider portion and the second slider portion is The first slider is arranged such that the value of the pressing force per unit area in the slider part is larger than the value of the pressing force per unit area in the second slider part, so that the air bearing surface of the first slider is The second slider section is displaced in accordance with the peaks and valleys of the surface roughness in such a manner that it can pass near the top of the peaks and above the valleys of the peaks and valleys of the surface roughness on the medium surface, and is the top of the peak of the peaks and troughs of the surface roughness of the magnetic recording medium, and the air bearing surface of the magnetic recording medium is approximately parallel to the surface of the magnetic recording medium in response to the surface runout of the magnetic recording medium at a height set above the top. Displace it so that it maintains a parallel posture.

(Example) Hereinafter, specific details of a method for flying a flying magnetic head assembly according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view of a floating magnetic head structure used in the floating operation method of a floating magnetic head structure of the present invention, and FIG. 2 is a plan view of a floating magnetic head structure used in the floating operation method of a floating magnetic head structure of the present invention. 3 is a front sectional view of the floating magnetic head assembly used in the floating operation method of the floating magnetic head assembly of the present invention, and FIG. 4 is a side view of the floating magnetic head assembly. 5 and 7 are perspective views of the floating magnetic head structure, FIG. 6 is an exploded perspective view of the floating magnetic head structure shown in FIG. 5, and FIG. 8 is a bottom view of the air bearing surface side. FIG. 7 is a perspective view of the magnetic head used in the floating magnetic head structure shown in FIG. 7, and FIG. 9 is a perspective view showing the inside of the floating magnetic head structure shown in FIG. , FIGS. 10 and 11 are diagrams for explaining the magnetic head,
12 to 14 are front views for explaining the operation of the floating magnetic head structure, FIG. 15 is a diagram for explaining the peaks and valleys formed by protrusions on the surface of the magnetic disk, and FIGS. 16 to 18 are front views for explaining the operation of the floating magnetic head structure. FIG.

1 to 3 are a plan view, a side view, and a front sectional view, respectively, of a floating magnetic head assembly used in the floating operation method for a floating magnetic head assembly of the present invention. The specific structure of the floating magnetic head structure will be described later with reference to FIGS. 3 to 9, and includes a first slider section 5LDI, a second slider section 5LD2, and an arm. It is composed of a division AMD.

D shown in FIGS. 2 and 3 is a magnetic recording medium, which is used by a magnetic head in a floating magnetic head structure operated by applying the floating operation method for a floating magnetic head structure of the present invention. The magnetic recording medium to be recorded and reproduced may be a solid magnetic disk, a flexible magnetic disk, or a sheet-shaped or tape-shaped magnetic recording medium. It may be of any configuration such as a medium.

The floating operation method of the floating magnetic head structure of the present invention is such that the magnetic head in the floating magnetic head structure can realize high-density recording and reproducing on a magnetic recording medium. In order to realize recording, it is necessary to stably float a slider provided with a magnetic head in a state extremely close to the surface of a magnetic recording medium.

By the way, the magnetic recording medium surface of the magnetic disk D used for magnetic recording and reproduction is not an ideal mirror surface, but has a continuum of unevenness in the shape of peaks and valleys.

FIG. 15 shows the unevenness of the magnetic recording medium surface in a tally step in a magnetic disk in which a coated magnetic layer 16 (see FIGS. 16 to 18) is formed on a base 15 (see FIGS. 16 to 18). An example of the results measured using a needle-type surface roughness meter is shown below.

In this way, since the surface of a magnetic recording medium has a series of peaks and valleys, it is difficult to install a magnetic head just because it is necessary to achieve high-density recording using a floating magnetic head structure as described above. It is not possible to unconditionally bring the slider in close proximity to the surface of the magnetic recording medium.

Now, when information signals are recorded on a magnetic disk or other magnetic recording medium using a magnetic head, or when information signals are reproduced from a magnetic disk or other magnetic recording medium using a magnetic head. The relationship between the magnetic head and the magnetic recording medium surface in this case is as shown in FIG. and when recording and reproducing are performed with the magnetic gap surface of the magnetic head H floating above the surface of the magnetic recording medium, as illustrated in FIG. It is well known that there are two main types.

When recording and reproducing are performed with the sliding surface of the magnetic head H in close contact with the surface of the magnetic recording medium as in the example shown in FIG. 16, the magnetic disk D used for recording and reproducing is When the magnetic recording medium surface of the magnetic disk D has continuous peaks and troughs, the magnetic head H, which performs recording and reproduction while being in close contact with the magnetic recording medium surface, causes the magnetic recording medium surface of the magnetic disk D to Since the large irregularities are crushed, the undulations of the irregularities are smoothed and a kind of gloss is created on the surface of the magnetic recording medium.

In FIGS. 16 to 18, 15 is a substrate, and 16 is a coated magnetic layer. Reference numeral 17 in FIG. 16 indicates debris of the applied magnetic layer material scraped by the magnetic head H.

When the magnetic head H contacts the surface of the magnetic recording medium to perform recording and reproducing operations as described above, the magnetic head H naturally wears out as it is used. Become.

By the way, if the surface of a magnetic recording medium has a rough surface with large undulations, the C/N will deteriorate, so when manufacturing a magnetic recording medium for high-density recording, it is necessary to eliminate the unevenness on the surface of the magnetic recording medium. However, even after such processing, the surface of the magnetic recording medium remains uneven.

On the other hand, as illustrated in FIG. 17, when recording and reproducing are performed in a state where the magnetic gap surface of the magnetic head H provided on the slider is levitated above the magnetic recording medium surface, If recording and reproduction are performed with the lower magnetic spatula floating so that the magnetic gap surface of the magnetic head H is located above the peaks of the peaks and troughs of the surface roughness, the magnetic head will wear out. Recording and reproducing operations can be performed without having to do so.

However, when recording and reproducing are performed by floating the slider so that the H magnetic gap surface of the magnetic head is located at a position far above the surface of the magnetic recording medium, as described above, the magnetic head Due to the large distance between the magnetic gap and the recording medium surface, the recording magnetic flux from the magnetic gap of the magnetic head spreads, making high-density recording difficult. When a recording medium is used, it is necessary to send a large recording current to the magnetic head in order to generate the magnetic flux that enables magnetic recording on the magnetic recording medium, and it is necessary to flow a large recording current to the magnetic head for levitation during playback. In the conventional floating magnetic head described above, in which the slider is levitated so that the H magnetic gap surface of the magnetic head is located at a position far above the surface of the magnetic recording medium. It was difficult to realize high-density recording and reproduction.

In other words, in order to achieve high-density recording and reproducing using a floating magnetic head, the slider must be moved so that the magnetic air gap surface of the magnetic head floating above the magnetic recording medium surface is brought extremely close to the magnetic recording medium surface. Therefore, when the slider is levitated in such a state that the magnetic air gap surface of the magnetic head, which is levitated from the magnetic recording medium surface by the slider, and the magnetic recording medium surface are extremely close to each other, as mentioned above, Even if a magnetic recording medium with a large coercive force is used as a magnetic recording medium for high-density magnetic recording and reproduction, it is difficult to maintain a magnetic head that does not cause magnetic saturation in the core of a magnetic head using an ordinary bulk ferrite core. It is possible to perform sufficiently good recording operations on magnetic recording media that have a large coercive force when a recording current is applied, and the gap loss during reproduction is also small, making it possible to perform high-density recording and reproduction using floating magnetic heads. It is also possible to realize

However, in conventional floating magnetic heads, the slider is large and has a large mass, and the structure does not have sufficient responsiveness to the magnetic recording medium surface. If the slider and the magnetic recording medium are levitated in close contact with each other and a recording/reproducing operation is performed, the magnetic head and the magnetic recording medium may be instantly destroyed due to contact or collision between the slider and the magnetic recording medium. When dust gets into small chips or recesses in the slider, which is floated so that the magnetic gap surface of the magnetic head and the magnetic recording medium surface are extremely close to each other, or when dust adheres to other parts, the dust This can cause the slider to snowball and come into contact with the moving magnetic recording medium, causing damage to the magnetic head and the magnetic recording medium. It is not possible to perform a recording/reproducing operation by floating the magnetic head in close proximity to the magnetic head, and therefore, it has been impossible to realize high-density recording with the conventional floating magnetic head.

A floating magnetic head assembly operated by applying the floating operation method for a floating magnetic head assembly of the present invention is as follows. The second slider SLI, 5LD2 is small and lightweight, and the first slider section 5LDI is configured to include a magnetic head 12, and when the floating magnetic head structure is operated, its air bearing surface 1
3 floats above the surface of the magnetic recording medium of the magnetic disk D in such a manner that it can pass near the top of the peaks and above the valleys of the ridges and valleys where the surface roughness of the surface of the magnetic recording medium of the magnetic disk D is continuous. Also, during operation of the floating magnetic head structure, the second slider portion 5LD2 has a height set above the top of the crests and troughs of the surface roughness of the magnetic recording medium of the magnetic disk D. At the position shown in FIG. However, when the entire air bearing surface of the second slider portion 5LD2 is indicated as the air bearing surface 14), the air bearing surface of the second slider portion 5LD2 is floated while maintaining a position correctly facing the magnetic recording medium and body surface. For example, as illustrated in FIG. This allows the magnetic recording medium to float above the surface of the magnetic recording medium in this manner.

That is, the air bearing surface 13 of the first slider section 5LDI is in a state of protruding from the air bearing surface 14 of the second slider section 5LD2 and floating above the surface of the magnetic recording medium. For example, as shown in FIG. 15, the height of the peaks and valleys on the medium surface is 0.5.
The height of the air bearing surface 13 of the first slider portion 5LDI above the magnetic recording medium surface is approximately 0.05 microns (500 angstroms).
The first slider portion 5L is
The support portions (18, 19) of the first slider portion 5LDI apply a pressing force that resists the lift force acting on the air bearing surface in the DI.
and the air bearing surface 14 of the second slider portion 5LD2.
is at least three times the height of the air bearing surface 13 of the first slider section 5LDI above the magnetic recording medium surface of 0.05 microns, that is, at a position of 0.15 microns or more from the magnetic recording medium surface. The second slider portion 5LD
By setting a pressing force that resists the lift force acting on the air bearing surface 14 of the second slider section 5LD2 at a pressurizing point P set at approximately the center position in the second slider section 5LD2, the second slider section 5LD2 becomes magnetic. The air bearing surface 14 of the magnetic recording medium is correctly opposed to the magnetic recording medium surface in response to the surface runout of the magnetic recording medium surface at a height set above the top of the peaks of the peaks and troughs of the surface roughness of the recording medium. The support plate 18.19 is displaced so as to maintain the posture of the second slider section 5LD2, and is capable of linear movement only in a direction substantially perpendicular to the direction of the air bearing surface 14 of the second slider section 5LD2. 1R- The first slider section 5LD1 supported by the rider sections ST and D2 has its air bearing surface 13 passing near the top of the peaks and above the valleys of the peaks and valleys of the surface roughness of the magnetic recording medium surface. It is displaced in a wet manner corresponding to the peaks and valleys of the rough surface, and the first
Even if the flying surface 13 of the first slider section 5LDI is floated extremely close to the magnetic recording medium surface, high-density recording can be performed by the magnetic head 12 without the first slider section 5LD1 coming into contact with the magnetic recording medium surface. It can be regenerated.

As described above, since the second slider portion 5LD2 floats to a position far away from the magnetic recording medium surface, dust on the magnetic recording medium surface is removed from the magnetic recording medium by the second slider portion 5LD2. Medium surface and second slider section 5L
The second slider portion 5LD passes through the gap with D2.
2, and the first slider part 5LDI also has a -side of 0.22 mm.
In order to avoid chips and holes in the square millimeter air bearing surface, it is made of monocrystalline ferrite and weighs about 5 milligrams, making it very small. By adopting a configuration that has a dust removal function as shown in FIG. The robot performs a levitation operation in such a manner that it skims the top of the peaks and troughs of the mountain, and in response to large dust particles, it floats above it.

The arm parts A M, D are made by, for example, punching and bending a thin elastic plate 20 into a predetermined shape, and their base ends 20a are fixed to a fixing part 24 with screws 22 and 23. The portion 20b near the base end of the arm portion AMD applies a predetermined pressing force to the second slider portion 5LD2 via the pressure point P due to the bending elasticity of that portion.

25 is a connecting member made of an extremely thin elastic plate, and this connecting member 25 has a U-shaped groove 2 near one end thereof.
A tongue piece 28 is constituted by drilling 7, and a protrusion P used as a pressurizing point P is formed on the tongue piece 28 by, for example, a punch.

The end of the connecting member 25 opposite to the end where the tongue piece 28 is formed is connected to the end 20 of the arm AMD.
7 fixed to the back surface of c by, for example, welding means 26, 26.2
6, and the lower surface of the tongue piece 28 of the connecting member 25 is fixed to a cover plate 29 which is fixed to the end of the second slider portion 5LD2.

As mentioned above, the lower surface of the connecting member 25 is connected to the second slider section 5.
When the tongue piece 2 of the connecting member 25 is fixed to the cover plate 29, which is fixed to the end of the LD 2,
The tip of the protrusion P configured in 8 is in point contact with the back surface near the tip of the arm AMD, so that the bending elasticity of the portion 20b near the base end of the arm AMD is increased as described above. The protrusion P is used as a pressure point P of the pressing force to be applied to the second slider part 5LD2 to supply a predetermined pressing force to the second slider part 5LD2.

The second slider portion 5LD2 has the lower surface of the tongue piece 28 of the connecting member 25 fixed to the cover plate 29 fixed to the end thereof as described above.
It is connected to the arm part AMD via the connecting member 25, but as mentioned above, the connecting member 25 is made of an extremely thin elastic plate, and furthermore, the connecting member 25 is connected to the arm part AMD near one end thereof. 26.26 Fixed to the arm part AMD at a position separated by a long distance from the position of the protrusion P provided on the tongue piece 28 surrounded by the U-shaped groove 27 bored in the 26.26
．． 26, the second slider portion 5LD2 is substantially connected to the arm portion AMD in a state of point contact by the protrusion P formed on the tongue piece 28 of the connecting member 25. .

The above-described protrusion P absorbs the bending elasticity of the portion 20b near the base end of the arm portion AMD to the second slider portion 5.
Since it functions as a pressurizing point P of the pressing force to be applied to LD2, the position of the protrusion P described above is largely related to the state of the floating state during the floating operation of the second slider portion 5LD2. It is something (,,,”tJ
I-1 The position of the protrusion P mentioned above is on the first slider 5LDI.
The position of the above-mentioned protrusion P formed on the tongue piece 28 of the connecting member 25 is different from the position of the first protrusion P because it is required to be on an extension of the position of the operating axis of the first. Second slider section S L Di.

5LD2, the cover plate 29 is fixed to the end of the second slider 5LD2, and the lower surface of the tongue piece 28 of the connecting member 25 is fixed to the cover plate 29. must be carried out.

The fixation of the cover plate 29 to the end of the second slider 5LD2 and the fixation of the lower surface of the tongue piece 28 of the connecting member 25 to the cover plate 29 are relatively correct, and the assembly work can be easily performed. In order to ensure that the cover plate 29 is installed correctly, it is of great advantage in the production of a horizontal magnetic head structure that a mark is provided in advance, for example, by a hole or the like, to indicate the correct mounting position.

Next, in FIG. 4, when the floating magnetic head structure is viewed from the air bearing surface side 1, 14a, 14b, and 14c.

14d is the main air bearing surface of the second slider portion 5LD2, and 14e and 14f are secondary air bearing surfaces that are present on the same plane as the main air bearing surfaces 14a to 14d of the second slider portion 5LD2. It is a floating surface, and further 31a,
Reference numeral 31b denotes an introduction surface formed by an inclined surface formed on the side wall of the second slider portion 5LD2 facing the inflow side of the thin layer gas flow.

Furthermore, 30a, 30b, 30c, and 30d are portions where the corners of the portions facing the magnetic recording medium surface are chamfered.

The second slider portion 5LD2 includes an air bearing surface 14a.

A groove 32 is formed between a continuous air bearing surface consisting of air bearing surfaces 14e and 14b and a continuous air bearing surface consisting of air bearing surfaces 14b, 14f and 14c. A round hole 33 is bored in the vicinity of the center, and in this round hole 33, a portion of the magnetic head 12 located on the right side of the first slider SLI) 1 is inserted into two parallel support plates 1.
8.19 is supported in a displaceable state.

That is, the first slider portion 5LDI has its air bearing surface 1
The vicinity of the end of the magnetic head 12 close to the magnetic gap surface 13 is fitted into the first support plate 18, which is provided with a hole 18c into which the vicinity of the end of the magnetic head 12 close to the magnetic gap surface 13 is inserted. After the support plate 18 is fixed, the second slider portion 5 is attached near both ends 18a and 18b of the support plate 18.
The edge of the second support plate 19, which is fixed to the bottom surface of the groove 32 in the LD2 and the end of the magnetic head 12 is fixed to the fixed surface 19a with the end of the magnetic head 12, is attached to the second slider section 5LD2. The support plate can be attached to the round hole 3 in the second slider portion 5LD2 by fixing it to the surfaces 34 and 35.
3, the magnetic head 12 is movably supported.

Then, as described above, the first slider portion 5LD1 is moved to the second slider portion 5LD1.
Since the two support plates, the first support plate 18 and the second support plate 19 used to support the slider portion 5LD2, are parallel to each other, the two support plates described above are parallel to each other. The first slider section 5LDI is supported by the support section of the first slider section 5LD1 consisting of plates 18 and 19 so that it can be displaced only in one direction perpendicular to the air bearing surface of the second slider section SL-D2. This means that it has been done.

The two support plates 18 and 19 that constitute the support portion of the first slider portion 5LDI are designed to have a large compliance so that they can be displaced favorably even by a pressing force of several tens of milligrams, for example. For example, the sixth
6(a) and 6(c) in the exploded perspective view of the first slider portion 5LDI. It can be configured with holes, but if it is processed in a way that leaves mechanical distortion during manufacturing, it may end up acting as a spring in only one direction. It is necessary to make sure that such things do not occur.

Note that the support plates 18 and 19 illustrated in FIGS. 6(a) and 6(c) have an extremely thin thickness, for example, 1 mm, so that they can be easily displaced even by a pressing force of, for example, several tens of milligrams.
It can be easily manufactured by forming through holes in a predetermined pattern on a stainless steel plate (with a thickness of 0 microns) by photolithography. The pattern of through holes shown in the figure is an example.

As described above, the support portion of the first slider portion 5LD1 consisting of the two support plates 18 and 19 is connected to the second slider portion 5LD.
Since the first slider portion 5LD1 has a degree of freedom only in one direction perpendicular to the air bearing surface in FIG. It will be displaced.

In FIG. 12, the first slider portion 5LDI is brought into a floating state above the magnetic recording medium surface by the lift force generated by the thin layer gas flow in the X direction in the figure between the magnetic recording medium surface and its air bearing surface 13. Then, a pressing force is applied to the eleventh slider section 5LDI by the support section of the first slider section 5LD1 consisting of the two support plates 18 and 19 described above, and the pressing force is equal to Y as described above. It is easy to understand that it is applied in the linear direction.

The second slider section 5LD2, which supports the first slider section 5LDI via its support section, has a thin section in the X direction in the figure between the magnetic recording medium surface and its air bearing surface 14. Due to the lifting force generated by the laminar gas flow, the surface of the magnetic recording medium in the solid state is made to float in the manner shown in FIG. 13, and the surface of the magnetic recording medium having flexibility is Above, it is brought into a floating state in the manner shown in FIG.

By the way, the thin layer gas flow in the X direction on the surface of the magnetic recording medium is
Between the magnetic recording medium surface and the air bearing surface 14 of the second slider section 5LD2 from the introduction ports 31a and 31b shown in FIG. 4 between the air bearing surface 14 of the second slider section 5LD2. When flowing in, the thin layer gas flow in the X direction on the surface of the magnetic recording medium changes from 14a to 14e to 1 on the air bearing surface 14.
14c → 14f → 1
4d to apply lifting force to each part and flow in the groove 32.

If the groove 32 in the second slider section 5LD2 has a constant width, the air bearing surface 14 of the second slider section 5LD2 due to the thin layer-gas flow in the X direction on the surface of the magnetic recording medium. As a result of experiments, it has been obtained that the distribution of the magnitude of the lift force applied to Like the air bearing surface 14 of the second slider part 5LD2, there is a round expansion near the center of the groove 32 that divides the air bearing surface 14 into two, so that the air bearing surface 14 floats along the thin layer gas flow in the X direction. Surface 14a → 14e → 14
b and the size of the floating surface 14Q → 14f → 14d change from large → small → large, the above floating surface 1
4 a −+ 14 e −+ 14 b and air bearing surface 1
The lift force generated on the air bearing surfaces 14a, 14e, 14b and the air bearing surfaces 14c, 14f, 14d of each part by the thin layer gas flow flowing along 4cm+14f→14d is as follows:
Large for the air bearing surfaces 14a and 14c, 7 air bearing surfaces 14e,
14f is small, and the air bearing surfaces 14b and 14d are medium, but on the air bearing surface 14 of the second slider portion 5LD2 shown in FIG. There is a circular expansion near the center part', and the unidirectional thin layer gas flow flowing through the wall balances the wall in the circular expansion area near the center of the groove 32 mentioned above. Finally, the floating surface 14b,
14d, the above-mentioned floating surfaces 14b, 1
4d increases, the lifting force exerted on the main air bearing surfaces 14a to 14d at the four corners of the air bearing surface 14 of the second slider portion 5LD2 shown in FIG. Air bearing surface 1 of slider section 5LD2 of No. 2
4 is brought into a state in which it is floating approximately parallel to the surface of the magnetic recording medium, that is, in a state in which it is stably floating in the correct flying position.

If the second slider portion 5LD2 is stably floating in the correct flying position in which its air bearing surface 14 is approximately parallel to the magnetic recording medium surface as described above, the flying position of the second slider portion 5LD2 is The second slider portion 5LD is moved by the support portion so as to be displaced by -1 in the direction perpendicular to the surface 14.
It is clear that the first slider portion 5LDI supported by the magnetic recording medium 2 is also placed in a state in which its flying surface 13 is floating approximately parallel to the surface of the magnetic recording medium.

-No. 0- As mentioned above, the air bearing surface 13 of the first slider portion 5LDI flies to a position extremely close to the magnetic recording medium surface, and the crests and troughs of the surface roughness of the magnetic recording medium surface are removed. The air bearing surface 14 of the second slider section 5LD2 is displaced in a manner that corresponds to the peaks and valleys of the surface roughness in such a manner that it can pass near the top and above the valleys, and the air bearing surface 14 of the second slider section 5LD2 is positioned above the surface of the magnetic recording medium. At a height set above the top of the peak of the rough peaks and troughs, the air bearing surface of the magnetic recording medium is maintained in a position that correctly faces the magnetic recording medium surface in response to the surface runout of the magnetic recording medium surface. It is done in a state of displacement.

5 and 7 are perspective views of the floating magnetic head structures, respectively, and the floating magnetic head structures shown in FIGS. 5 and 7, respectively, have a first slider portion 5L thereof.
The difference is that the shape of the magnetic air gap surface in the magnetic head 12 used in DI is different. 6 (a) to (c) in Fig. 6 are the floating magnetic heads shown in Fig. 5. 6 is a diagram showing a specific example of the support plate 18, the magnetic head 12, and the support plate 19 by disassembling the first slider portion 5-LD1 in the structure, and FIG. 6(d)
8 is a diagram showing the internal structure of the floating magnetic head structure shown in FIG. 5, cut at the center;
The figure shows a specific example of the magnetic head 12 used in the first slider section 5LDI in the floating magnetic head structure shown in FIG. FIG. 2 is a diagram illustrating the internal structure of the illustrated floating magnetic head structure by cutting it at the center.

The floating magnetic head structure shown in FIGS. 7 to 9 is a magnetic head 12 used in the first slider section 5LDI, and the floating surface 13 of the first slider section 5LDI is used as the magnetic head 12. The shape of the magnetic air gap surface is such that the magnetic recording medium surface and the first
The shape is basically a parallelogram in which one diagonal exists in the direction X of the thin layer gas flow flowing between the slider portion 5LDI and the air bearing surface 13, and A magnetic gap is provided near the intersection of two diagonals of the parallelogram in the magnetic gap plane, the direction of the other diagonal of the parallelogram coincides with the moving direction Y' of the floating magnetic head structure, and , an introduction part for smoothing the introduction of the thin layer gas flow is formed on the introduction side of the thin layer gas flow described above, and furthermore, a surface is formed so that the extended seven long line portion of one of the diagonals described above forms a ridgeline. The material used is one that has been subjected to a drop-processing process.

As the magnetic head 12 used in the first slider section 5LDI which is floated very close to the magnetic recording medium surface, the magnetic air gap surface which serves as the air bearing surface 13 of the first slider section 5LD1 is as described above. For example, as illustrated in FIG. Even if dust adheres to the magnetic head 12 provided in the slider section 5LDI,
It moves in the direction of the dotted arrow shown in FIG. 10(b) during the floating operation and is automatically removed.

Figure 11 shows a magnetic disk D rotating in the direction of arrow X.
The magnetic air gap surface of the magnetic head, which operates as the floating surface 13 of the first slider section floating above the surface of the magnetic recording medium, is
The dust attached to the magnetic head 12 when the magnetic disk D is moved in the diametrical direction as indicated by the arrow Y', the direction of its removal (the direction of the dotted line arrow and the direction of the dashed line in the figure), and the number thereof are shown. ing.

The first disk floating above the magnetic recording medium surface of the magnetic disk D
The magnetic air gap surface of the magnetic head, which operates as the air bearing surface 13 of the slider section, has arrows X and Y shown in FIG.
' If dust adheres to the side facing the magnetic head and the magnetic L1
However, as mentioned above, the magnetic air gap, which forms the air bearing surface 13 of the first slider section 5LDI, tends to fill the gap between the air bearing surface and the flying surface of the floating magnetic head structure, thereby hindering the flying operation of the flying magnetic head assembly. The shape of the surface is the same as that of the first slider portion 5LD.
During the floating operation of I, the magnetic recording medium surface and the first slider section 5
Direction X of the thin layer gas flow flowing between the air bearing surface 13 of the LDI
If the shape is basically a parallelogram with one diagonal line at In order to automatically remove dust adhering to the magnetic gap surface of the magnetic head, which operates as the floating surface 13 of the floating magnetic head, the first slider portions SL and D1 in the floating magnetic head structure are extremely close to the magnetic recording medium surface. The air bearing surface 1 of the magnetic head 12 used in the first slider section 5LDI is
No. 3 has no dust attached to it, and a stable floating operation is performed.

Note that there may be small dents or small chips on the air bearing surface 13 of the magnetic head 12 used in the first slider section 5LD1, which is designed to fly extremely close to the surface of the magnetic recording medium. , the dust that has entered there will be retained as is, and new dust will adhere one after another using the retained dust as a nucleus, impairing the good floating operation of the first slider portion 5LD1. Things also happen.

Therefore, it is inappropriate to use a material that has unevenness (for example, sintered ferrite) as the constituent material of the first slider section 5LDI, and the air bearing surface is made of the core material of the magnetic head and the glass material of the substrate. A structure in which an adhesive layer is formed by bonding the two sliders with a resin-based adhesive is also unsuitable because dust adheres to the resin material of the adhesive layer used, and the first slider As the constituent material of part 5LDI, for example, a smooth single crystal material is used, or a material in which the glass substrate and the core material of the magnetic material are bonded by glass welding. If a very slight step is formed in the glass welding layer during mirror polishing of the surface,
Dust gets into that part and is held there, and new dust adheres one after another using the held dust as a nucleus, impairing the good floating operation of the first slider part 5LDI. Therefore, mirror polishing of the air bearing surface must be performed in good condition.

As mentioned above, materials with no unevenness or chipping should be used as the constituent materials of the first slider section 5LDI and the second slider section 5LD2, so for practical purposes, single crystal ferrite materials are used. , titanium alumina material, ceramic material, sapphire material, etc. are used for the first slider portion 5LDI.
It is also used as a constituent material of the second slider portion 5LD2. Further, as the constituent materials of the first slider section 5LDI and the second slider section 5LD2, materials that generate less static electricity are more advantageous in terms of the problem of dust adhesion.

Note that the first slider section 5LDI and the second slider section 5
Using a material that generates static electricity with the same polarity as that generated on the surface of the magnetic recording medium, or using a conductive material as a constituent material of the LD2, may cause problems with dust adhesion. It is desirable considering this.

The two supporting plates 18 are parallel to each other as described above.
．． The second slider portion 5LD2 is configured such that the second slider portion 5LD2 is displaced only in one direction perpendicular to the air bearing surface of the second slider portion 5LD2 by the first slider portion 5LDI support portion consisting of 19.
The first slider section 5LDI supported by the above-mentioned two supporting plates 18 has an extremely small floating surface 13 of, for example, a rectangular shape with a side of Q and 22 mm.
The first slider portion 5LD is
When the pressing force applied to I is 50 m gr, the first slider portion 5
The air bearing surface 13 of the LDI is levitated by 500 angstroms from the magnetic recording medium surface, and at this time, the unit area (1
The pressing force per millimeter squared is approximately 1 gr.

As mentioned above, the first slider portion 5LDI floating at a height of 500 angstroms above the surface of the magnetic recording medium is extremely light, so it collides with the top of the peaks and valleys existing on the surface of the magnetic recording medium. Even if an operation is performed to scrape it off, the aforementioned operation will not cause any damage to the magnetic recording medium surface.

The first slider section 5LDI is extremely small and lightweight, and the air bearing surface 13 has a shape that makes it difficult for dust to adhere to it, as described above, so there is no dust attached to it, and large dust and foreign objects can be removed from the magnetic recording. When the magnetic recording medium is present on the medium surface or the magnetic recording medium surface is deformed, the first slider section 5LDI responds by vertical movement and performs a floating operation. There is no possibility of large dust or foreign objects colliding with the surface of the magnetic recording medium, and the first
Because the slider portion 5LDI is extremely small and lightweight, it fits between the air bearing surface 13 and the magnetic recording medium surface! The trapped dust is not crushed by the first slider section 5LDI, and therefore the crushed dust is attached to the first slider section 5LDI and is moving at high speed between the magnetic recording medium and the magnetic recording medium. There is no possibility of frictional heat being generated.

The second slider section 5LD2, which performs a floating operation above the magnetic recording medium surface while supporting the first slider section 5LDI, floats at a higher position from the magnetic recording medium surface than the first slider section 5LDI. However, at a position far from the magnetic recording medium surface, the lift force applied to the slider air bearing surface becomes smaller due to the thin layer of gas flow between the magnetic recording medium surface and the slider air bearing surface. The second slider portion 5LD2 has a large flying surface area so that it floats at a high position away from the surface of the magnetic recording medium.

Therefore, the second slider portion 5LD2 is provided with a floating surface of a large area, and a relatively small pressing force is applied via the projections P described above. The portion 5LD2 is suspended in a region where friction with the C thin layer gas flow above the magnetic recording medium is small.

For example, the second slider portion 5LD2 has a diameter of about 0.05
The second slider section 5LD2 is configured to have a larger area than the first slider section 5LD1, which is configured to have an area of about 12 square millimeters, for example, about 12 square millimeters.
The air bearing surface 14 of the second slider portion 5LD2 is at a position 76+a+++ from the center of the magnetic recording medium which is being rotated at 2400 revolutions per minute with a pressing force of approximately 3 gr being applied via the projection P described above. It flies by about 0.6 microns from the magnetic recording medium surface, and at this time, the air bearing surface 14 of the second slider section 5LD2 has a force of about 0.25 g r/ per 'W area (1 millimeter square). A pressing force is being applied.

As described above, the second slider portion 5LD2 is in a state where it is floating at a higher position from the magnetic recording medium surface than the first slider portion 5LD1, but in this state, the second slider portion 5LD2 is not used for magnetic recording. The second slider portion 5LD2 is placed in a state where it is floating above the top of the peaks and troughs on the medium surface, that is, in a state where the second slider portion 5LD2 is floating in an area where friction with the thin layer gas flow on the magnetic recording medium is small. Therefore, the second slider portion 5LD2 does not come into contact with the magnetic recording medium surface during the floating operation, and the relationship between the size and amount of dust present on the magnetic recording medium surface is Since the amount of dust increases rapidly as the size decreases, the dust on the surface of the magnetic recording medium flows through a large gap between the surface of the magnetic recording medium and the second slider section 5LD2. This prevents dust from adhering to the second slider portion 5LD2.

As described above, when the second slider portion 5LD2 is placed in a state where it is floating far above the top of the peaks and valleys on the surface of the magnetic recording medium, the air bearing surface of the second slider portion 5LD2 and Even if the parallelism with the magnetic recording medium surface is slightly distorted, it also helps to prevent the two from coming into contact and being destroyed.

By the way, the second slider portion 5L from the magnetic recording medium surface
The higher the height of the air bearing surface 14 of D2, the smaller the lift force exerted on the air bearing surface of the slider by the thin layer gas flow between the magnetic recording medium surface and the air bearing surface 14 of the slider.
However, since the pressing force to be applied to the second slider portion 5LD2 is also reduced, the influence of external shocks applied to the floating magnetic head structure becomes more pronounced.

Therefore, the height of the second slider section 5LD2 from the magnetic recording medium surface is determined by the amount of deviation from parallelism between the air bearing surface of the second slider section 5LD2 and the magnetic recording medium surface, and the influence of external impact. etc., the air bearing surface 1 of the second slider section 5LD2 from the magnetic recording medium surface is limited to a range that does not impede the operation of the first slider section 5LDI.
The height of 4 is preferably about 0.6 to 3 microns, for example.

If the magnetic recording medium that is the subject of recording and reproducing using a floating magnetic head structure is a solid magnetic recording medium, during the recording and reproducing operation performed using a floating magnetic head structure, Although the two surfaces of the magnetic recording medium do not sink as illustrated in FIG. In the case of a flexible magnetic recording medium, if the floating magnetic head structure is large or exerts a large pressing force on the surface of the recording medium during recording and reproducing operations, the flexible magnetic recording medium will rotate. However, even if the flexible magnetic recording medium can rotate, the flexible magnetic recording medium may be damaged by the floating magnetic head structure. Although it has not been expected that a head can satisfactorily perform recording and reproducing operations on a flexible magnetic recording medium, in the floating operation method of the floating magnetic head structure of the present invention, During the recording/reproducing operation performed using the magnetic head structure, the 14th
As illustrated in the figure, it is possible to perform the floating operation of the floating magnetic head assembly in a state where the surface of the magnetic recording medium is sinking.

In FIG. 14, reference numeral D denotes a flexible magnetic recording medium, and this flexible magnetic recording medium is the first magnetic recording medium in the floating magnetic head structure that performs a floating operation on its surface.
Second slider section 5LDI.

30a to 30 in FIG.
The corners are also deformed so as to be spaced apart from the corner chamfered portions indicated by d (numbered 30 in FIG. 4).

That is, when the floating magnetic head assembly of the present invention performs a recording/reproducing operation on a flexible magnetic recording medium by applying the floating operation method of the floating magnetic head assembly, the lightweight second slider section 5LD2 is used. The chamfered surfaces 30a to 30d of the surrounding corners of the air bearing surface 14 are also given lift by the thin gas flow flowing over the magnetic recording medium surface of the flexible magnetic recording medium. , the surfaces 30a to 30d formed by chamfering the corners around the air bearing surface 14 in the second slider portion 5LD2 are also made to float above the surface of the magnetic recording medium,
The aforementioned lightweight second slider section 5LD2, which is movably connected to the arm section AMD through the state of substantial point contact by the aforementioned protrusion P, is mounted in a high-flying device that is high above the surface of the magnetic recording medium. The air bearing surface 14.30 is placed in a state in which it is correctly opposed to the magnetic recording medium 65 (Fig. 1).
Further, the air bearing surface 14 of the second slider portion 5LD2 described above
The air bearing surface 13 of the small and lightweight first slider portion 5LD1, which is supported so as to be displaceable only in one direction orthogonal to the magnetic recording medium, is also placed in a state in which it correctly faces the surface of the magnetic recording medium.

Now, the significance of the existence of the surfaces 30a to 30d formed by chamfering the corners around the air bearing surface 14 of the lightweight second slider portion 5LD2 in the floating magnetic head structure and the surface 30
A detailed description of the method for forming elements a to 30d is as follows.

1st. When a floating magnetic head structure including the second slider sections 5LD1 and 5LD2 is caused to fly over a flexible magnetic recording medium in a contact start-stop manner, magnetic The state of contact between the floating magnetic head structure and the flexible magnetic recording medium before it levitates from the recording medium surface is the state of contact between the floating magnetic head structure and the flexible magnetic recording medium when the floating magnetic head structure is submerged with respect to the flexible magnetic recording medium. The four corners of the second slider section 5LD2 are brought into contact with the magnetic recording medium having the strongest flexibility.

Therefore, as described above, the floating magnetic head structure with the four corners of the second slider portion 5LD2 in strong contact with the flexible magnetic recording medium is placed on top of the flexible magnetic recording medium. When a flexible magnetic recording medium is rotated at high speed in order to be levitated, the four corners of the second slider portion 5LD2 in the above-described floating magnetic head structure cause the flexible magnetic recording medium to be in strong contact with it. This will damage the magnetic recording medium.

In order to prevent the above-mentioned damage to the flexible magnetic recording medium, the four corners of the second slider section 5LD2 in the floating magnetic head structure are chamfered, and the surfaces of the four corners are chamfered. Surface 30 formed by removing and removing
The lift force generated on the surfaces 30a to 30d due to the thin layer gas flow on the surface of the magnetic recording medium having flexibility in the areas a to 30d is caused by the thin layer gas flow on the surface of the magnetic recording medium to the second slider portion 5LD2. The main floating planes 14a to 14d
If the lifting force is similar to that generated in the floating magnetic head structure, the flying surface 13 in the first slider portion 5LDI
The floating magnetic head structure is floated on a flexible magnetic recording medium in a manner as shown in FIG. 14.

That is, in the flying operation method of a floating magnetic head structure of the present invention, even if the magnetic recording medium on which the floating magnetic head structure is to be caused to fly is solid, or the magnetic recording medium is flexible. Even if the first . Second slider section 5LD1
．． , 5LD2 and the magnetic recording medium surface, as illustrated in FIGS. By forming a flying gap, the flying magnetic head assembly can be floated in a good flying state over the surface of the magnetic recording medium, as shown in FIGS. 13 and 14, respectively.

As mentioned above, regardless of whether the magnetic recording medium on which the floating magnetic head structure is to be operated in a floating manner is solid or flexible, the floating magnetic head structure may be used for magnetic recording in the same way. In order to levitate the medium above the surface of the medium, the surfaces 30a to 30d formed by chamfering the four corners of the second slider portion 5LD2 in the floating magnetic head structure are, for example, as follows. It can be formed in the second slider portion 5LD2.

That is, first, in the floating magnetic head structure, the air bearing surfaces 14a to 14f of the second slider portion 5LD2 and the surfaces 30a to 30d formed by chamfering the four corners of the air bearing surface 14 of the slider portion 5LD2 are not formed. Attach only the second slider parts ST and D2 to the arm part AMD, and first use a normal surface polishing machine to polish the second slider part S.
The air bearing surfaces 14a to 1.4f of the LD 2 are formed by flat lapping, and then the second slider portion 5LD2 is formed.
The four corners of the air bearing surface 14 of the slider section 5LD2 are chamfered while a pressing force is applied to the second slider section 5LD2 via the protrusion P from the arm section AMD to which only the slider section AMD is attached. 30d.

The above processing corresponds to a type of mounting polishing, and the polishing disk uses a floating magnetic head structure and has various mechanical properties similar to those of a flexible magnetic recording medium that is to be recorded and reproduced. Diamond powder with a particle size of about 0.2 microns is evenly and thinly rubbed onto a disk sheet having a thickness of ": Rotate the polishing disk at the same rotation speed as the rotation speed of the magnetic recording medium when recording and reproducing with the type magnetic head structure, for example, 2400 revolutions per minute,
In addition, when a floating magnetic head assembly performs recording and reproduction from a flexible magnetic recording medium to be recorded and reproduced, a pressure force that is slightly larger than that to be applied to the floating magnetic head assembly is applied. The four corners of the air bearing surface 14 of the slider part 5LD2 are chamfered and polished as described above, with only the second slider part 5LD2 attached to the second slider part 5LD2 via the protrusion P from the arm part AMD to which only the second slider part 5LD2 is attached. It is done by board.

The floating surface 14 of the slider portion 5LD2 is formed by the polishing disk described above.
At the beginning of the chamfering finishing step 7, the four corners of the flying surface 14 of the second slider 5LD2 of the workpiece are in a state where corners are present, so the chamfering is not done half-embedded in the polishing disk. The diamond powder with a particle size of 0.2 microns that is rubbed into the polishing disc in a state where it is mixed with the diamond powder that is present on the surface of the polishing disc or in a mixed state that exists on the surface of the polishing disc is When it comes into contact with the mount, it is polished.

As the polishing progresses and a surface is formed by chamfering, a lifting force gradually acts on the surface, causing the second slider 5LD2 to float, and the surfaces formed at the four corners of the air bearing surface 14 of the second slider 5LD2 are The pressing force of the diamond powder of the polishing disk against the chamfer decreases, and the polishing condition gradually shifts to a softer one, resulting in a finer finish on the chamfer. In addition, if too much diamond powder is rubbed into the polishing disc, the diamond powder will aggregate into clumps and a clean surface will not be formed during the polishing process, so the amount of diamond powder rubbed into the polishing disc must be in an appropriate amount. .

Now, as described above, in the flying operation method of the floating magnetic head structure of the present invention, when the magnetic recording medium on which the floating magnetic head structure is to be caused to fly is in the form of a solid, the method is illustrated in FIG. 13. In addition, if the magnetic recording medium on which the floating magnetic head structure is to be operated is flexible, the floating magnetic head structure may No. 1 in Each air bearing surface 13 of the second slider section 5LI)1, 5LD2,
14 and the magnetic recording medium surface, a predetermined flying gap is formed at each shoulder, and the floating magnetic head structure has a good flying gap on the magnetic recording medium surface, as illustrated in FIGS. 13 and 14, respectively. The first slider portion 5LDI in the floating magnetic head structure can be levitated in a floating state.
floats near the top of the peaks and troughs on the surface of the magnetic recording medium, and the second slider portion 5LD2 in the above-described floating magnetic head structure floats near the top of the peaks and troughs of the surface of the magnetic recording medium. It is placed in a state where it floats far above the top.

Now, as an example, in a floating magnetic head structure, the first slider section 5 is made up of two supporting plates 18 and 19 that are parallel to each other, and the second slider section 5 is
The air bearing surface 13 of the first slider section 5LDI supported by the second slider section 5LD2 so as to be displaced only in one direction perpendicular to the air bearing surface 14 of the LD2 is, for example, rectangular and has a side of 0.22 mm. Also, the magnetic head provided in the first slider section 5LDI described above has a magnetic gap length of 0.3 to 0.5 microns and a track width of 0.5 microns.
007 to 0.02, and furthermore, the first slider portion 5 is
Assume that the pressing force applied to the LDI is 50 mgr (the aforementioned pressing force per unit area (1 mm square) on the air bearing surface 13 of the first slider section 5LDI is approximately 1 gr), and the above-mentioned first slider The second slider section 5LD2 that supports the section 5LDI via the first slider section 5LDI support section has a larger area than the first slider section 5LDI, for example, about 12 square millimeters. The second slider portion 5LD2 has the aforementioned projection P.
(a state in which a pressing force of approximately 0.25 gr is applied per unit area (1 millimeter square) to the floating surface 14 of the second slider portion 5LD2) ), the air bearing surface 14 of the second slider portion 5LD2 at a position 76 mm from the center of the magnetic recording medium rotating at 2400 revolutions per minute.
is placed in a state in which it is levitated by about 0.6 microns from the surface of the magnetic recording medium, and the air bearing surface 13 of the first slider section 5LDI is in a state in which it is in a state in which it is levitated by 500 angstroms from the surface of the magnetic recording medium.

In the above example, the air bearing surface 13 of the first slider section 5LDI, which serves as the magnetic gap surface of the magnetic head 12 provided in the first slider section 5LDI in the floating magnetic head structure, is located approximately above the surface of the magnetic recording medium. Since the magnetic head 7 is in the floating state at a position of 500 angstroms, 7 is the magnetic gap length G and the magnetic gap of the magnetic head 12 on the surface of the magnetic recording medium. Even if an extremely small magnetic head 12 is used, such as a magnetic gap length of approximately 0.3 to 0.5 microns, where the ratio G/H to the surface height H is 3 or more, good recording and reproduction can be performed. According to the flying operation method of the floating magnetic head structure of the present invention, high-density recording can be easily performed by the floating magnetic head structure, and as mentioned above, the floating magnetic head structure can be used at a height of 500 angstroms from the surface of the magnetic recording medium. Since the floating first slider section 5LDI is extremely light, even if it collides with the top of the peaks and valleys existing on the surface of the magnetic recording medium and performs an operation to scrape it off, the above-mentioned The second slider section 5LD2 does not cause any damage to the surface of the magnetic recording medium due to the operation thereof, and also performs a floating operation above the surface of the magnetic recording medium while supporting the first slider section 5LDI. Its air bearing surface 14 is the air bearing surface 1 of the first slider section 5LDI.
Since the second slider portion 5LD2 is operated in a state where it is floating at a higher position than the magnetic recording medium surface compared to the position 3, in this state, the second slider portion 5LD2 is floating above the top of the peaks and troughs on the magnetic recording medium surface. In other words, the second slider portion 5LD2 is floating in an area where the friction with the thin layer gas flow on the magnetic recording medium is small. Even if the parallelism between the air bearing surface and the magnetic recording medium surface is slightly disrupted, it is difficult for the two to contact each other and destroy the magnetic recording medium, and dust on the magnetic recording medium surface is removed from the magnetic recording medium. Dust does not flow through the large gap between the surface and the second slider portion 5LD2 and adhere to the second slider portion 5LD2.

Furthermore, when the floating magnetic head assembly of the present invention performs a recording/reproducing operation on a magnetic recording medium by applying the floating operation method of the floating magnetic head assembly, it is preferable that the magnetic recording medium is in a solid state. 1° second slider section 5LDI,
Of course, recording and reproducing operations are performed with the 5LD2 floating stably as described above, and even when recording and reproducing operations are performed on a flexible magnetic recording medium,
The thin layer flowing on the magnetic recording medium surface of the flexible magnetic recording medium also exists in the chamfered surfaces 30a to 30d of the corners around the air bearing surface 14 in the lightweight second slider section 5LD2. Surfaces 30a to 30d are provided with lift by the gas flow and are configured by chamfering the corners around the floating surface 14 in the second slider portion 5LD2.
The above-mentioned lightweight part AMD is also made to float above the surface of the magnetic recording medium, and is connected to the arm part AMD in a substantially point-contact state by the projection P mentioned above, so as to be freely displaceable. The slider portion 5LD2 of No. 2 is at its air bearing surface 14.3 at a high flying position from the magnetic recording medium surface.
0 is correctly opposed to the surface of the magnetic recording medium, and 7hoo76= is supported so that it can be displaced only in one direction perpendicular to the air bearing surface 14 of the second slider section 5LD2. The air bearing surface 13 of the first slider portion 5LDl, which is small and lightweight, is also placed in a state in which it correctly faces the surface of the magnetic recording medium, so that recording and reproducing operations can be performed satisfactorily.

(Effects of the Invention) As is clear from the above detailed explanation, the present invention utilizes the lift force generated on the air bearing surface of the slider section by the thin layer gas flow between the magnetic recording medium surface and the air bearing surface of the slider section. The first
In the floating magnetic head structure, which is composed of two slider parts, a slider part and a second slider part, and the first slider part is equipped with a magnetic head, the first slider part is a second slider part. The second slider section is supported by a support section that is capable of linear movement only in a direction substantially perpendicular to the direction of the air bearing surface in the second slider section, and the air bearing surface thereof is located at the peaks and troughs of the surface roughness of the magnetic recording medium surface. The second slider section is displaced corresponding to the peaks and valleys of the surface roughness in such a manner that it can pass near the top of the peaks and above the valleys of the magnetic recording medium. At a height set above the top of the mountain, the air bearing surface is displaced in response to the surface runout of the magnetic recording medium so that it maintains a position in which it correctly faces the magnetic recording medium surface. The above-described thin gas flow between the magnetic recording medium surface and the above-described flying surfaces of the first and second slider sections is performed so that the above-described floating operation of the above-described first and second slider sections is performed. Applying pressure that resists the lift force acting on the air bearing surfaces of the first and second slider sections, respectively, is applied at approximately the center position of the support section of the first slider section and the second slider separation. A floating magnetic head structure is provided with a floating magnetic head structure in which the first slider section of the floating magnetic head structure has a large floating surface compared to its flying surface. The magnetic recording medium surface is supported by a second slider part that is capable of linear movement only in a direction substantially perpendicular to the direction of the air bearing surface in the second slider part having an air bearing surface of the same area. The thin layer gas flow between the air bearing surfaces of the first and second slider sections causes the first slider to resist the lift force acting on the air bearing surfaces of the first and second slider sections, respectively. The pressure points applied to the support part of the slider part and the second slider part are each set at the center of each individual pressing force, that is, the pressing force applied to the first slider part is greater than the pressing force applied to the first slider part. Also, the pressing force applied to the second slider part is smaller, and the pressing force per unit area of the pressing force applied to the first slider part and the second slider part is smaller than the pressing force applied to the second slider part. The value of the pressing force per unit area in the first slider part is larger than the value of pressing force per unit area in the second slider part, and the first slider The air bearing surface of the magnetic recording medium is steered corresponding to the peaks and troughs of the surface roughness in such a manner that it can pass near the top of the peaks and above the valleys of the peaks and troughs of the surface roughness of the surface of the magnetic recording medium. The slider section 2 has a height set above the top of the peaks and troughs of the surface roughness of the magnetic recording medium, and its air bearing surface is magnetically adjusted in response to the surface runout of the magnetic recording medium surface. High-density recording can be easily performed using a floating magnetic helad structure by displacing the magnetic head in a manner that maintains a position approximately parallel to the surface of the recording medium. The first one floating nearby
Since the slider portion 5LDI is extremely light, it collides with the top of the peaks and valleys existing on the surface of the magnetic recording medium.
Even if an operation is performed to scrape it off, the above-mentioned operation will not cause any damage to the surface of the magnetic recording medium, and furthermore, the above-mentioned first slider portion 5LD1
The second slider section 5LD2, which performs a floating operation above the magnetic recording medium surface while supporting the slider section 5LD2, has its air bearing surface 14 higher than the position of the air bearing surface 13 of the first slider section 5LDI from the magnetic recording medium surface. In this state, the second slider section 5LD2 is in a state where it is floating above the top of the peaks and troughs on the surface of the magnetic recording medium, that is, the second slider section 5LD2 is operating in a state where it is floating in the magnetic recording medium surface. Since the recording medium is floated in a small area where the friction with the thin layer gas flow is small, the parallelism between the floating surface of the second slider portion 5LD2 and the magnetic recording medium surface is reduced during the floating operation. Even if it collapses a little, it is difficult for the two to contact and break, and dust on the surface of the magnetic recording medium can be removed between the surface of the magnetic recording medium and the second slider section 5LD2. It flows through a large gap and passes through the second slider section 5L.
There is no possibility of dust adhering to D2.
Furthermore, when the floating magnetic head assembly of the present invention performs a recording/reproducing operation on a magnetic recording medium by applying the floating operation method of the floating magnetic head assembly, when the magnetic recording medium is in a solid state, the first , second slider portion 5LD1.
It goes without saying that recording and reproducing operations are performed with the 5LD2 stably floating, and even when recording and reproducing operations are performed on a flexible magnetic recording medium, the lightweight second slider section Also, the chamfered surfaces 30a to 30d of the corners around the air bearing surface 14 in 5LD2 are
A lift force is given by the thin layer gas flow flowing on the magnetic recording medium surface of the flexible magnetic recording medium, and chamfering is applied to the corners around the air bearing surface 14 in the second slider portion 5LD2. The portions of surfaces 30a to 30d constituted by are also in a state of floating above the surface of the magnetic recording medium, and are movably connected to the arm portion AMD by a state of substantial point contact by the projection P. The second slider section 5LD2 with the above-mentioned voice volume
However, the air bearing surface 14.30 of the magnetic recording medium 7 is placed in a state where it correctly faces the surface of the magnetic recording medium at a high flying position from the surface of the magnetic recording medium 7, and the air bearing surface of the second slider portion 5LD2 mentioned above is The air bearing surface 13 of the small and lightweight first slider section 5LDI supported so as to be displaceable only in one direction perpendicular to the magnetic recording medium 14 is also brought into a state in which it faces the magnetic recording medium and body surface correctly, so that the recording/reproducing apparatus can It is done well.

[Brief explanation of the drawing]

1A and 1B are plan and top views of a floating magnetic head structure used in the floating operation method for a floating magnetic head structure of the present invention, and FIG.
3 is a side view of a floating magnetic head assembly used in the floating operation method of a floating magnetic head assembly of the present invention, and FIG. FIG. 4 is a bottom view of the air bearing surface side of the floating magnetic head structure, FIGS. 5 and 7 are perspective views of the floating magnetic head structure, and FIG. 6 is a bottom view of the floating magnetic head structure. 8 is an exploded perspective view of the floating magnetic head structure shown in FIG. 7, FIG. 9 is a perspective view of the magnetic head used in the floating magnetic head structure shown in FIG. FIGS. 10 and 11 are explanatory views of the magnetic head, and FIGS. 12 to 14 are views of the floating type magnetic head. 15 is a front view for explaining the operation of the structure; FIG. 15 is a diagram for explaining the peaks and valleys formed by protrusions on the surface of the magnetic disk; FIGS. 16 to 18 are diagrams for explaining the recording and reproducing operation by the magnetic head; FIG. Figures 22 to 22 are perspective views showing conventional examples of parent-child type floating magnetic head devices, and Figures 23 to 26 are side views illustrating problems with conventional parent-child type floating magnetic head devices. 1.5.8... Parent slider, 2, 7... Three floating surfaces of parent slider 1, 3... Leaf spring, 4, 7.10...
- Child slider, 6, 9... Viscoelastic film, 11... Plate member, 12... Magnetic head, 13... Air bearing surface of first slider portion 5LD1, 14, 14 a to 14 f
- Air bearing surface of second slider portion 5LD2, 15... Base, 16... Coated magnetic layer, 17... Scraps of coated magnetic layer material scraped by magnetic head H, SLI, 5LD2.
...1st degree second slider section, 18.19...parallel support section (support section) capable of linear movement only in a direction substantially perpendicular to the direction of the air bearing surface 14 in the second slider section 5LD2. plate), AMS...arm part, 20...thin elastic plate, 20b...portion near the proximal end I in arm part AMD, 22.23...screw, 24...fixing part, 2
5... Connecting member made of extremely thin elastic plate, 27.
... U-shaped groove, 28 ... Tongue piece, P ... Pressure point (protrusion), 29 ... Cover plate, 31a, 31b ...
・Introduction surface 30 formed by an inclined surface formed on the side wall facing the inflow side of the thin layer gas flow in the second slider portion 5LD2
a, 30b, 30c, 30d-
--A portion where the corner of the portion facing the magnetic recording medium surface is chamfered, 32...Groove, 33...Round hole, 34.35
...The support plate of the second slurry sea bream part 5LD2 is mounted on the surface,

Claims (1)

[Scope of Claims] 1. A first magnetic recording medium that can be brought into a floating state above the magnetic recording medium surface by a lift force generated on the air bearing surface of the slider section by a thin layer of gas flow between the magnetic recording medium surface and the air bearing surface of the slider section.
In the floating magnetic head structure, which is composed of two slider parts, a slider part and a second slider part, and the first slider part is equipped with a magnetic head, the first slider part is a second slider part. The second slider section is supported by a support section that is capable of linear movement only in a direction substantially perpendicular to the direction of the air bearing surface in the second slider section, and the air bearing surface thereof is located at the peaks and troughs of the surface roughness of the magnetic recording medium surface. The second slider section is displaced corresponding to the peaks and valleys of the surface roughness in such a manner that it can pass near the top of the peaks and above the valleys of the magnetic recording medium. At a height set above the top of the mountain, the air bearing surface is displaced in response to the surface runout of the magnetic recording medium surface so as to maintain a position in which it correctly faces the magnetic recording medium surface. The above-mentioned first and second slider sections are caused to fly by a thin layer of gas flow between the magnetic recording medium surface and the air bearing surfaces of the first and second slider sections, so that the above-mentioned first and second slider sections are floated. A pressing force that resists the lift force acting on the air bearing surface of the second slider section is applied individually to a pressurizing point set approximately at the center of the support section of the first slider section and the second slider section. 2, a flying operation method of a flying magnetic head structure in which a floating force is generated on the flying surface of the slider section by a thin layer of gas flow between the magnetic recording medium surface and the flying surface of the slider section. The above-mentioned first floating type magnetic head structure in the floating magnetic head structure is composed of two slider parts, a first slider part and a second slider part, each of which can be brought into a floating state, and the above-described first slider part is equipped with a magnetic head. The slider section of the second slider section has a larger area of air bearing surface than the air bearing surface of the second slider section. The slider is supported by the slider part, and corresponds to the peaks and valleys of the surface roughness in such a manner that its flying surface can pass near the top of the peaks and above the valleys of the peaks and valleys of the surface roughness of the magnetic recording medium surface. Further, the second slider portion is adapted to cope with the surface runout of the surface of the magnetic recording medium at a height set above the top of the peaks and troughs of the surface roughness of the magnetic recording medium. The surface of the magnetic recording medium and the aforementioned first slider are displaced so that the flying surface thereof maintains a state substantially parallel to the surface of the magnetic recording medium, thereby performing the flying operation of the first and second slider sections. Supporting the first slider part against the lifting force acting on the air bearing surfaces of the first and second slider parts, respectively, due to the thin layer gas flow between the air bearing surfaces of the first and second slider parts. The pressing force to be applied individually to the pressure point set at approximately the center of the first slider section and the second slider section is
The pressing force applied to the second slider section is greater than the pressing force applied to the first slider section, and
The value of the pressing force per unit area of the pressing force applied to the slider part and the second slider part is that the value of the pressing force per unit area in the first slider part is higher than that in the second slider part. Method 3 of flying operation of a flying magnetic head structure in which the value of the pressing force per unit area is greater than the value of the pressing force per unit area. A flying operation method for a flying magnetic head structure according to claim 4, wherein the flying height is set to be three times or more the flying height from the magnetic recording medium surface of the first slider part. Any one of claims 1 to 3, wherein the ratio G/H of the magnetic air gap length G for magnetic recording and reproduction to the flying height H of the air bearing surface of the first slider section from the magnetic recording medium surface is set to 3 or more. A method 5 for flying a floating magnetic head assembly according to claim 5; a method 6 for flying a floating magnetic head assembly according to any one of claims 1 to 4 using a solid magnetic recording medium; A flying operation method of a flying magnetic head structure according to any one of claims 1 to 4, using a magnetic recording medium having