Hard disk magnetic head and preparation method thereof and hard disk

Abstract

The present application discloses a hard disk magnetic head and a preparation method thereof and a hard disk, wherein the top of the super-slip pad of the hard disk magnetic head is fixedly connected to the bottom of the magnetic head slider by an adhesive material, and the bottom end contacts the upper surface of the magnetic disk without a lubricating layer; wherein the magnetic head slider is arranged at an angle, and when moving, an angle θ is formed between the bottom surface of the magnetic head slider and the upper surface of the magnetic disk; the distance between the read-write head on one side of the magnetic head slider and the magnetic medium layer of the magnetic disk is less than or equal to the preset head-disk spacing. The setting of the super-slip pad can stably support the read-write head installed on one side of the magnetic head slider above the upper surface of the magnetic disk at a certain height, which is conducive to reducing the machining accuracy of the magnetic head arm and the accuracy requirements for the flight height control, and avoiding long-term wear of the magnetic disk and the read-write head; it can also well solve the defects of traditional hard disks in airflow, impact protection and disk surface wear, and greatly improve the stability and safety of the hard disk, so the hard disk magnetic head of the present invention is easy to achieve a lower flight height adjustment and improve the performance of the hard disk.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of storage devices, and in particular to a hard disk head and a method for preparing the same, and a hard disk. Background Art

[0002] With the continuous development of information technology, people have higher and higher requirements for the storage capacity and read-write efficiency of hard disks. At present, the reading and writing of hard disks are mostly done by suspending the read-write head at a height of several nanometers above the disk body (flying height, which can be referred to as flying height). When reading and writing magnetic information, the magnetic field strength will show a quadratic decay as the distance between the head and the magnetic medium increases; specifically, when reading and writing data, the rotary motor drives the disk to rotate at high speed, the airflow on the surface of the disk changes, and the head is suspended on the surface of the disk under the action of the airflow (equivalent to flying), and the voice coil motor drives the head to move above the rotating disk through the head arm, so that the read-write head next to the head can read and write data on different tracks (which can be regarded as circles of different radii on the disk); in fact, in order to improve the storage density of the hard disk and ensure fast and accurate reading and writing of magnetic information on the disk, the distance between the read-write head and the surface of the disk magnetic medium (including flying height) is required to be smaller and smaller.

[0003] The Chinese patent application with application number CN201910334082.6 discloses a contact-type read-write hard disk with multiple heads arranged side by side. By attaching a layer of graphene or other super-slippery materials to the surface of the read-write head, the read-write head can slide directly on the disk. At this time, the read-write head and the disk are always in close contact. However, based on basic common sense in the field of hard disks, it is known that during the processing and production process, dust and other impurities may be generated on the disk, or the surface flatness of the disk may decrease with long-term use. A full-contact read-write hard disk may cause damage to the read-write head due to dust and other impurities and the bumps of the read-write head.

[0004] Moreover, the above application requires redesign of the head arm and other related head parts and components. After decades of development, the upstream and downstream industrial chains of the hard disk field have been formed. Therefore, it is difficult to reprocess and design the head arm, hard disk housing, etc. However, it is difficult to further reduce the flying height based on the existing structure, and the design accuracy requirements for the internal hard disk are also high.

[0005] Therefore, there is an urgent need for a new type of magnetic head structure that can further reduce the flying height without increasing the design accuracy requirements of the structure. Summary of the invention

[0006] The embodiments of the present application provide a hard disk magnetic head and a method for manufacturing the same, and a hard disk, so as to improve the read and write performance of the hard disk.

[0007] A first aspect of an embodiment of the present application provides a hard disk head, comprising: a head slider and at least one super-slip pad;

[0008] The top end of the super-slip gasket is fixedly connected to the bottom of the magnetic head slider through an adhesive material, and the bottom end is in contact with the upper surface of the magnetic disk without a lubricating layer;

[0009] The head slider is tilted, and when moving, an angle θ is formed between the bottom surface of the head slider and the upper surface of the disk, and the angle θ does not exceed 30°; a read-write head is provided on the side of the head slider close to the upper surface of the disk, the read-write head is arranged toward the disk, and the distance between the read-write head and the magnetic medium layer of the disk is less than or equal to a preset head-disk spacing (such as 3nm).

[0010] Optionally, the angle θ is between 0.08° and 0.3°.

[0011] Optionally, the distance between the read / write head and the magnetic medium layer of the magnetic disk is smaller than the preset head-disk distance.

[0012] Optionally, the distribution position and size of the at least one super-slip gasket to be bonded between the head slider and the upper surface of the magnetic disk meet stable receiving conditions, and the stable receiving conditions are determined according to the size and weight of the head slider.

[0013] Optionally, the stable receiving condition includes: the spacing between two adjacent super-slip gaskets is set within a preset spacing range;

[0014] When the at least one group of super-slip gaskets is three super-slip gaskets arranged in a triangular distribution, there are two super-slip gaskets on the side close to the read-write head, and the spacing between the two super-slip gaskets close to the read-write head and the single super-slip gasket away from the read-write head is within the preset spacing range (such as 200um to 500um).

[0015] Optionally, the thickness of the super-slip pad on a side close to the read / write head is less than or equal to the thickness of the super-slip pad on a side away from the read / write head.

[0016] Optionally, the super-slip gasket is connected to the magnetic head slider via a connecting material, and the connecting material includes the bonding material and a deposition material;

[0017] The deposition layer formed by the deposition material is laid on the bottom surface of the head slider at a preset deposition angle, and the bottom surface of the deposition layer is connected to the super-slip gasket through the adhesive material, so that the distance between the read-write head and the magnetic medium layer of the magnetic disk is less than or equal to a preset head-disk distance; wherein the deposition angle is the inclination angle of the bottom surface of the deposition layer relative to the horizontal plane.

[0018] Optionally, the deposition material is a metal material that can produce a eutectic phenomenon, and the deposition angle formed by the metal material is within a preset deposition angle range (eg, 0.09° to 0.23°).

[0019] Optionally, the angle of the deposition angle is less than or equal to the angle of the included angle.

[0020] Optionally, at least one surface of the super-slip gasket is a super-slip surface, and a side surface of the super-slip gasket having the super-slip surface is in contact with the upper surface of the magnetic disk.

[0021] Optionally, the super-slip gasket is at least one super-slip gasket formed in one piece or in separate parts.

[0022] Optionally, the magnetic head slider is a magnetic head slider that undergoes plastic deformation.

[0023] Optionally, the bottom surface of the super-slip gasket that contacts the upper surface of the magnetic disk is a super-slip surface made of an atomically smooth two-dimensional material.

[0024] Optionally, the bottom surfaces of the plurality of super sliders fixedly bonded to the bottom of the head slider are in the same horizontal plane.

[0025] A second aspect of an embodiment of the present application provides a method for preparing a hard disk head, the method being used to prepare the hard disk head described in the first aspect or any specific implementation of the first aspect, comprising:

[0026] A magnetic disk and a magnetic head slider with a read / write head disposed on one side are prepared, wherein the surface of the magnetic disk is not provided with a lubricating layer;

[0027] Prepare a super-slip gasket, and place the super-slip gasket on the upper surface of the magnetic disk;

[0028] The magnetic head slider is placed obliquely above the super-slip pad, and the distance between the read / write head and the magnetic medium layer of the magnetic disk is height-adjusted so that the distance is adjusted to be less than or equal to a preset head-disk distance;

[0029] The adjusted spacing is maintained and the adhesive material in the connecting material is cured.

[0030] Optionally, performing height adjustment processing on the distance between the read / write head and the magnetic medium layer of the disk includes:

[0031] A height-fixing cushion layer having a thickness of a target height is arranged on the upper surface area of ​​the magnetic disk near the read / write head, the height-fixing cushion layer is used to cause the magnetic head slider to undergo plastic deformation so as to fix and connect the super slider, and the target height is the distance between the read / write head and the upper surface of the magnetic disk whose value is less than the preset head-disk distance value;

[0032] Determining the distribution position of the super-sliding sheet relative to the read / write head according to the thickness of the super-sliding sheet and the height-fixing cushion layer;

[0033] The height determining cushion layer is removed and the adhesive material in the connecting material is cured, so that the read / write head is placed above the disk surface at the target height.

[0034] Optionally, the height-fixing cushion layer is made of 1 to 10 layers of graphene.

[0035] Optionally, the connection material further comprises a deposition material; after preparing the magnetic head slider having a read / write head disposed on one side and before performing a height adjustment process on the distance between the read / write head and the upper surface of the magnetic disk, the method further comprises:

[0036] Laying the deposition material on the bottom surface of the magnetic head slider to form a deposition layer with a preset deposition angle, wherein the deposition angle is an inclination angle of the bottom surface of the deposition layer relative to a horizontal plane;

[0037] Optionally, the height adjustment process includes:

[0038] The distribution position of the super-slip sheet relative to the read / write head is adjusted according to the thickness of the super-slip sheet and the deposition layer, and the distance between the read / write head and the magnetic medium layer of the disk on which the super-slip sheet is placed is regulated in cooperation with the displacement device to adjust the distance to be less than or equal to the preset head-disk distance.

[0039] Optionally, the method further includes performing height recognition on the distance between the read / write head and the magnetic medium layer of the disk:

[0040] Pre-storing magnetic signals in the magnetic disk;

[0041] The magnetic signal is read by the read / write head, and if the strength of the magnetic signal reaches a preset value, it is determined that the read / write head is placed above the upper surface of the magnetic disk at a target height.

[0042] Optionally, at least one surface of the super-slip gasket is a super-slip surface, and a side surface of the super-slip gasket having the super-slip surface is in contact with the upper surface of the magnetic disk;

[0043] Optionally, the distribution position and size of the super-slip gasket bonded to the bottom of the head slider meet stable receiving conditions, and the stable receiving conditions are determined according to the size and weight of the head slider.

[0044] A third aspect of an embodiment of the present application provides a hard disk, comprising a head arm, a magnetic disk, and a hard disk head as described in the first aspect or any specific implementation of the first aspect, wherein the magnetic disk has no lubricating layer, and the head arm is connected to one end of the magnetic disk head.

[0045] Optionally, the head arm is used to control the hard disk head to fly away from the magnetic disk or slide against the magnetic disk.

[0046] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0047] The provision of the super-slip gasket in the embodiment of the present application can, on the one hand, stably support the read-write head installed on one side of the head slider on the magnetic disk at a certain height. The super-slip gasket can stably support the head slider, which can reduce the processing accuracy of the head arm and the accuracy requirements for the flight height control, and can avoid the direct collision of the read-write head with the surface of the magnetic disk. At the same time, during reading and writing, the height of the read-write head can be reduced to the minimum, and the head slider can be controlled to fly away from the magnetic disk when addressing is required, which can avoid dust and other impurities on the surface of the magnetic disk from damaging the read-write head during high-speed rotation, and can also avoid the super-slip gasket from sliding in contact with the magnetic disk for a long time, causing damage to the magnetic disk.

[0048] On the other hand, it can also effectively solve the defects of traditional hard disks in airflow, impact protection and disk surface wear, and greatly improve the stability and safety of the hard disk; in addition, reducing the use of lubricating materials on the disk surface can further improve the read and write resolution and read and write speed of the hard disk. Therefore, the hard disk head of the embodiment of the present application is easy to achieve lower flying height adjustment and improve the hard disk performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0050] Figure 1a A schematic diagram of the structure of a hard disk head according to an embodiment of the present application;

[0051] Figure 1b It is a schematic diagram of the structure of a traditional hard disk head;

[0052] Figure 2a Schematic diagram of the position distribution of the super-slip gasket in the embodiment of the present application ( Figure 1a or Figure 2b Bottom view of the structure);

[0053] Figure 2b Another structural schematic diagram of a hard disk head according to an embodiment of the present application;

[0054] Figure 3 An exemplary diagram of a hard disk magnetic head and a manufacturing method thereof and a hard disk according to an embodiment of the present application;

[0055] Figure 4 Another exemplary diagram of a hard disk magnetic head and a manufacturing method thereof and a hard disk according to an embodiment of the present application;

[0056] The reference numerals include:

[0057] 1. Magnetic head slider; 2. Super-slip gasket; 3. Magnetic disk; 30. Lubricating layer; 31. Diamond-like carbon (DLC) layer; 32. Magnetic medium layer; 33. Magnetic disk substrate; 4. Read / write head; 5. Deposition material (deposition layer); 6. Fixed height pad. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0060] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0061] To facilitate understanding and explanation, before further describing the embodiments of the present application in detail, the nouns and terms involved in the present application will be explained. The nouns or terms involved in the present application are subject to the following explanations.

[0062] 1) Structural superlubricity: It can be understood as the state where the friction and wear are almost zero when two solid surfaces in direct contact (without lubricant) slide relative to each other. In this state, the friction coefficient is generally as small as 10^-3 or lower. In this application, it specifically refers to the contact between the bottom surface of the superlubricity gasket and the upper surface of the disk without a lubricating layer with almost no wear and friction.

[0063] 2) Atomic contact: The two atomically flat surfaces are parallel to each other, there are no other impurities between the two interfaces, and the atoms between the interfaces do not form chemical bonds. There is only intermolecular contact (van der Waals action) between the interfaces.

[0064] 3) Head-disk spacing: that is, the distance between the read / write head (a part of the magnetic head) and the surface of the magnetic medium material on the surface of the disk platter, which is an important factor in determining the storage surface density of a mechanical hard disk. The smaller the head-disk spacing, the higher the supported storage density; the traditional head-disk spacing often includes the head flying height (the height difference or spacing between the read / write head and the upper surface of the disk), the thickness of the disk surface lubrication layer, and the thickness of the disk protection layer (such as the diamond-like carbon DLC layer). The target height (or target flying height) in the embodiment of the present application is specifically an ideal spacing (such as a positive number below 1nm) between the read / write head and the upper surface of the disk (i.e., the upper surface of the DLC layer) that is less than the preset head-disk spacing value (such as 3nm), which is equivalent to the read / write head being suspended or flying above the upper surface of the disk at the target height.

[0065] The embodiments of the present application are described in further detail below.

[0066] See also Figures 1a to 3 In a first aspect, the present application provides an embodiment of a hard disk head, comprising: a head slider 1 (which may be called a slider) and at least one super-slip gasket 2; the top of the super-slip gasket 2 is fixedly connected to the bottom of the head slider 1 by an adhesive material, and the bottom end is in contact with the upper surface of a magnetic disk 3 without a lubricating layer; the head slider is arranged at an angle, and when moving, an angle θ is formed between the bottom surface of the head slider and the upper surface of the magnetic disk, and the angle θ does not exceed 30°, preferably, the angle θ generally does not exceed 10°; a read-write head is provided on one side of the head slider close to the upper surface of the magnetic disk, the read-write head is arranged toward the magnetic disk, and the distance between the read-write head and the magnetic medium layer of the magnetic disk is less than or equal to a preset head-disk spacing (such as 3nm or other values).

[0067] In one example, the angle θ between the bottom surface of the head slider and the upper surface of the disk can be specifically between 0.08° and 0.3°, and the distance between the read / write head and the magnetic medium layer of the disk can be specifically less than a preset head-disk spacing of 3 nm.

[0068] In actual applications, the purpose of flying the magnetic head over the disk surface instead of simply sliding on the disk surface is to reduce wear. The reason is that a magnetic head can fly over the disk surface for more than one million kilometers in its lifetime. If it slides in contact with the disk surface, it will be worn out quickly. Figure 1b The conventional hard disk shown in FIG. 1 (with an air floating inclination angle θ for generating air floating force, a flying height h, and a disk 3 including a lubricating layer 30, a diamond-like carbon layer 31, a magnetic medium layer 32 and a disk substrate 33) is Figure 1a In the hard disk of the embodiment of the present application shown (with an inclination angle θ', a flying height h', where θ'≈θ), an ultra-slip gasket 2 with ultra-slip properties is used between the head slider 1 and the magnetic disk 3, which can not only solve the existing problem of coating a lubricating layer (grease layer) on the surface of the magnetic disk 3 to effectively prevent the magnetic medium material of the magnetic disk from being worn, but also achieve the purpose of flying the magnetic head at a target height in the absence of airflow (removing the buoyancy effect), thereby avoiding the setting limitations of the lubricating layer and airflow on the flying height of the magnetic head. Therefore, the bottom of the head slider does not need to be provided with an air floating groove to help the head slider fly under airflow conditions, and the flying height can be easily reduced. Therefore, compared with the flying height h+lubricating layer thickness t of the traditional hard disk 1 ≥2nm, the design of the embodiment of the present application can easily adjust the fly height h' to ≤2nm, that is, compared with the traditional technology, the fly height can be simply and effectively reduced, so that the magnetic head can slide closely on the surface of the magnetic disk without worrying about wear problems, thereby greatly improving the storage density and service life of the hard disk.

[0069] In a specific embodiment, the inclination angle θ of the bottom surface of the head slider 2 relative to the horizontal plane or the upper surface of the disk can be zero, as long as the distribution position and size of the super-slip gasket here meet the stable bearing condition. In other words, as long as it can be ensured that the read-write head 4 can be stably suspended above the disk surface at the target height, the head slider can be parallel to the upper surface of the disk under the bearing action of the super-slip gasket; the stable bearing condition is determined according to the size and weight of the head slider. By way of example, the stable bearing condition includes: the spacing between two adjacent super-slip gaskets is set within a preset spacing range.

[0070] In the present application, at least one surface of the superslip pad is a superslip surface, and one side of the superslip pad having the superslip surface is in contact with the upper surface of the magnetic disk. Exemplarily, the bottom surface of the superslip pad in contact with the upper surface of the magnetic disk should be a superslip surface made of an atomically smooth two-dimensional material (such as graphite or graphene); specifically, at least one superslip surface of the superslip pad can be made of highly oriented pyrolytic graphite or natural graphite. In addition, in practical applications, in order to ensure superslip contact between the superslip pad and the magnetic disk surface, the bottom surfaces of the multiple superslips fixedly bonded to the bottom of the magnetic head slider (in a state of being fixed to the magnetic head slider) should be in the same horizontal plane, and this implementation process may specifically depend on one or more of the following configurations: the thickness of the applied bonding material (such as glue), the position of the superslip pad to be bonded to the magnetic head slider, and the thickness of the superslip pad itself.

[0071] In one embodiment, at least one set of super-slip pads is as follows Figure 2a As shown, there are three super-slip pads arranged in a triangular distribution (three-point distribution), wherein the side close to the read / write head has two super-slip pads, and the spacing between the two super-slip pads close to the read / write head and the single super-slip pad away from the read / write head is within the aforementioned preset spacing range (such as 200um to 500um obtained from experience), and the thickness of the super-slip pad close to the read / write head can be less than or equal to the thickness of the super-slip pad away from the read / write head; the stable bearing conditions here can also include: the length of the head slider is 700±50um, and the thickness of the super-slip pad ranges from 200nm to 1um. Of course, the actual number of super-slip pads used in this application can also be as follows Figure 3 The one (one-point type) or multiple types other than three shown can be used as long as the stability between it and the disk can be guaranteed. Specifically, the inclination angle of the head slider supported by the super-slip gasket remains unchanged and the flying height of the read-write head remains stable.

[0072] On the basis of the above-mentioned embodiments, in order to further ensure that the contact surface between the super-slip pad and the magnetic head slider can be adaptively and closely connected, and to remove unnecessary grooves such as air-floating grooves or connection grooves for docking the super-slip pad on the bottom surface of the magnetic head slider, a certain thickness of deposition material 5 can be deposited under the magnetic head slider or a magnetic head slider that undergoes plastic deformation, such as plastic deformation caused by heat or pressure, can be used. Figure 2bAs shown, the super-slip gasket is connected to the head slider by a connecting material, and the connecting material includes the aforementioned adhesive material and a deposition material. The deposition layer 5 formed by the deposition material is laid on the bottom surface of the head slider at a preset deposition angle, and the bottom surface of the deposition layer is connected to the super-slip gasket by an adhesive material, so that the distance between the read-write head and the magnetic medium layer of the disk is less than or equal to the preset head-disk spacing, which is equivalent to making the spacing between the read-write head and the upper surface of the disk reach the target height; the deposition angle here is the inclination angle of the bottom surface of the deposition layer relative to the horizontal plane, which can be set according to actual needs and the target height value (such as a value of 1nm and below). Exemplarily, the angle of the deposition angle is less than or equal to the angle of the aforementioned angle, and the deposition material is a metal material that is prone to eutectic phenomenon, such as an indium tin material. The deposition angle formed by the metal material is within the preset deposition angle range (such as between 0.09° and 0.23°). It can be seen that the deposition material of the present application can achieve height adjustment and bonding. It should be noted that the super-slip gasket in the present application can be at least one super-slip sheet formed in one piece or in separate parts; of course, in practical applications, the head-disk distance between the read-write head and the surface of the magnetic medium layer of the disk can be reduced by adjusting the coating thickness of the DLC layer.

[0073] Of course, in actual applications, if the bottom surface of the magnetic head slider to be used has already been provided with an air-floating groove or a connecting groove for connecting the super-slip pad, the thickness of the super-slip pad and its bonding position on the bottom surface of the magnetic head slider can be set according to actual needs, and the connecting material can be used adaptively (such as filling the groove with a deposition material) so that the distance between the read / write head and the disk surface can reach the target height. In addition, a notch for attaching the super-slip pad can be opened on the upper surface of the disk according to actual needs.

[0074] It can be seen that the setting of the super-slip gasket of the present application can stably support the read / write head installed on one side of the head slider on the disk at a certain height. The super-slip gasket stably supports the head slider, which can reduce the processing accuracy of the head arm and the accuracy requirements of the flying height control, and can avoid the read / write head directly colliding with the surface of the disk. At the same time, when reading and writing, the height of the read / write head can be reduced to the minimum, and the head slider can be controlled to fly away from the disk when addressing is required, which can avoid dust and other impurities on the surface of the disk from damaging the read / write head when rotating at high speed, and can also avoid the super-slip gasket from sliding in contact with the disk for a long time, causing damage to the disk. Of course, according to the specific structural design and the flying height limit, the head slider can also always slide in contact with the disk, and no specific restrictions are made here.

[0075] On the other hand, it can also effectively solve the defects of traditional hard disks in airflow, impact protection and disk surface wear, greatly improving the stability and safety of the hard disk, such as it is expected to be prepared into a vacuum hard disk.

[0076] In summary, the bottom end of the super-slip gasket 2 of the present application can always maintain atomic contact with the upper surface of the magnetic disk 3 (super-slip structure), and the two are in a super-slip state, that is, the friction force is almost zero and there is no wear, thereby avoiding wear of the magnetic disk platter and the magnetic head; at the same time, the setting of the super-slip gasket and the magnetic disk without a lubricating layer can easily reduce the head-disk distance, which is equivalent to reducing the traditional flight distance (flying height).

[0077] See also Figures 1a to 4 The second aspect of the present application provides a method for preparing a hard disk head, the method being used to prepare the hard disk head described in the first aspect or any specific embodiment of the first aspect, comprising:

[0078] S1, preparing a magnetic disk 3 and a magnetic head slider 1 with a read / write head 4 on one side, wherein the surface of the magnetic disk 3 is not provided with a lubricating layer;

[0079] S2, preparing a super-slip gasket 2, and placing the super-slip gasket on the upper surface of the magnetic disk;

[0080] S3, tilting the magnetic head slider above the super-slip pad, and adjusting the distance between the read / write head 4 and the magnetic medium layer of the magnetic disk 3 so that the distance is less than or equal to the preset head-disk distance;

[0081] S4. Maintaining the adjusted spacing and curing the adhesive material in the connecting material is equivalent to allowing the read / write head 4 to be placed above the surface of the magnetic disk 3 at a target height. It can be understood that the target height is a spacing (e.g., 1 nm) between the read / write head and the upper surface of the magnetic disk (specifically, the upper surface of the DLC layer) that is less than a preset head-disk spacing value (e.g., 3 nm).

[0082] In one example, at least one surface of the super-smooth gasket is a super-smooth surface, and one side of the super-smooth gasket has a super-smooth surface that fits the upper surface of the magnetic disk; the distribution position and size of the super-smooth gasket 2 that is fixedly bonded to the bottom of the head slider 1 meet the stable receiving conditions, and the stable receiving conditions are determined according to the size and weight of the head slider 1.

[0083] In a specific implementation, the specific implementation process of step S3 may include:

[0084] S31, setting a height-fixing cushion layer with a thickness of a target height in the upper surface area of ​​the disk near the read / write head, the height-fixing cushion layer is used to cause the magnetic head slider to undergo plastic deformation to fix and connect the super slider; for example, Figure 3 As shown, the height-fixing cushion layer is a graphene cushion layer paved with at least one layer of graphene, and specifically may be 3 layers of graphene with a total thickness of about 1 nm.

[0085] S32, determining the distribution position of the super slider relative to the read / write head according to the thickness of the super slider and the height-fixing cushion layer;

[0086] S33, removing the height-determining cushion layer and curing the adhesive material in the connecting material, so that the read / write head is placed above the disk surface at a target height.

[0087] Therefore, during processing, the read / write head is pressed onto a height-fixing cushion layer 6 having a total thickness of the target height, causing the slider to undergo plastic deformation, and then the height-fixing cushion layer 6 is removed, so that the distance between the read / write head and the upper surface of the disk can reach the target height.

[0088] In a specific embodiment, when the connection material further includes the deposition material 5, after step S1 and before step S3, the method of the present application may further include:

[0089] A deposition material is laid on the bottom surface of the head slider to form a deposition layer 5 with a preset deposition angle, where the deposition angle is the inclination angle of the bottom surface of the deposition layer relative to the horizontal plane; therefore, the specific implementation process of step S3 may include: adjusting the distribution position of the super-slip relative to the read-write head according to the thickness of the super-slip and the deposition layer, and coordinating with the displacement device to adjust the distance between the read-write head and the magnetic medium layer of the disk on which the super-slip pad is placed, so as to adjust the aforementioned distance to be less than or equal to the preset head-disk distance, which is equivalent to allowing the read-write head to be placed above the disk surface at a target height.

[0090] like Figure 4 As shown, in actual operation, the super-slip gasket to be bonded is determined according to the stable receiving conditions. Before it is actually bonded, it has a certain height adjustability due to its adjustable distribution position and its own thickness. Therefore, the piezoelectric displacement platform can be used to control the disk with the super-slip gasket to move up, and at the same time, the distance between the read-write head and the upper surface of the disk is always accurately measured. Finally, the rise of the piezoelectric displacement platform is stopped when the distance is about 1nm, and the glue is cured while maintaining this 1nm distance (target height) so that the super-slip gasket is bonded to the head slider, thereby achieving atomic contact between the super-slip gasket and the disk surface, and reliably and effectively ensuring that the read-write head is placed above the disk at a target height lower than the traditional flying height, so as to improve the data reading and writing performance of the hard disk.

[0091] In the technology described in the above embodiment, in a specific implementation manner, the method of the present application may further include highly identifying the distance between the read / write head and the magnetic medium layer of the disk:

[0092] Pre-storing magnetic signals in the disk;

[0093] The magnetic signal is read by the read / write head. If the magnetic signal strength reaches a preset value, it is determined that the read / write head is placed above the upper surface of the disk at a target height.

[0094] This height recognition process helps to efficiently and accurately control the head-to-disk spacing by monitoring the magnetic signal strength, that is, placing the read / write head at a target height above the disk surface.

[0095] The hard disk head in the method embodiment described in the second aspect of the present application is similar in structure and function to the hard disk head described in the first aspect or any specific embodiment of the first aspect, and will not be described in detail. The order of execution of steps S1 and S2 in the present application is not limited, as long as it is ensured that the head slider and super-slip pad actually required can be prepared; that is, it can be understood that in various embodiments of the present application, the serial number of each step does not mean the order of execution, and the execution order of each step should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0096] The third aspect of the present application provides a hard disk, which includes a head arm, a magnetic disk and the hard disk head described in the first aspect or any specific implementation of the first aspect, there is no lubricating layer on the magnetic disk, and the head arm is connected to one end of the magnetic disk head.

[0097] In a specific embodiment, the head arm is used to control the hard disk head to fly away from the disk or slide against the disk. It can be understood that the head arm is used to receive and drive the hard disk head to move over the disk to read the disk.

[0098] The above embodiments are only used to illustrate the technical solution of the present application, but not to limit it.

Claims

1. A hard disk head, It is characterized in that include: A head slider and at least one super-slip pad; The top end of the super-slip gasket is fixedly connected to the bottom of the magnetic head slider through an adhesive material, and the bottom end is in contact with the upper surface of the magnetic disk without a lubricating layer; The magnetic head slider is tilted, and when it moves, there is an angle θ between the bottom surface of the magnetic head slider and the upper surface of the magnetic disk, and the angle θ does not exceed 30°; A read / write head is provided on one side of the head slider close to the upper surface of the disk, the read / write head is arranged toward the disk, and the distance between the read / write head and the magnetic medium layer of the disk is less than or equal to a preset head-disk distance; Among them, the distribution position and size of the at least one super-slip gasket to be bonded between the head slider and the upper surface of the disk meet the stable bearing conditions; the super-slip gasket is connected to the head slider through a connecting material, and the connecting material includes the bonding material and the deposition material.

2. The hard disk head according to claim 1, It is characterized in that The angle θ is less than 10°.

3. The hard disk head according to claim 1, It is characterized in that The distance between the read / write head and the magnetic medium layer of the magnetic disk is smaller than the preset head-disk distance.

4. The hard disk head according to claim 1, It is characterized in that The stable receiving condition is determined according to the size and weight of the magnetic head slider.

5. The hard disk head according to claim 4, It is characterized in that The stable bearing conditions include: the spacing between two adjacent super-slip gaskets is set within a preset spacing range; When the at least one group of super-slip gaskets is three super-slip gaskets arranged in a triangular distribution, there are two super-slip gaskets on the side close to the read / write head, and the spacing between the two super-slip gaskets close to the read / write head and the single super-slip gasket far from the read / write head is within the preset spacing range.

6. The hard disk head according to claim 1 or 5, It is characterized in that The thickness of the super-slip pad on the side close to the read / write head is less than or equal to the thickness of the super-slip pad on the side away from the read / write head.

7. The hard disk head according to claim 1, It is characterized in that The deposition layer formed by the deposition material is laid on the bottom surface of the head slider at a preset deposition angle, and the bottom surface of the deposition layer is connected to the super-slip gasket through the adhesive material, so that the distance between the read-write head and the magnetic medium layer of the magnetic disk is less than or equal to a preset head-disk distance; wherein the deposition angle is the inclination angle of the bottom surface of the deposition layer relative to the horizontal plane.

8. The hard disk head according to claim 7, It is characterized in that The deposition material is a metal material that can produce a eutectic phenomenon, and the deposition angle formed by the metal material is within a preset deposition angle range.

9. The hard disk head according to claim 7, It is characterized in that The angle of the deposition angle is less than or equal to the angle of the included angle.

10. The hard disk head according to claim 1, It is characterized in that At least one surface of the super-slippery gasket is a super-slippery surface, and a side surface of the super-slippery gasket having the super-slippery surface is in contact with the upper surface of the magnetic disk.

11. The hard disk head according to claim 1, It is characterized in that The super-slip gasket is at least one super-slip sheet formed in one piece or in separate parts.

12. A method for preparing a hard disk head, It is characterized in that For preparing a hard disk head according to any one of claims 1 to 11, comprising: A magnetic disk and a magnetic head slider with a read / write head disposed on one side are prepared, wherein the surface of the magnetic disk is not provided with a lubricating layer; Prepare a super-slip gasket, and place the super-slip gasket on the upper surface of the magnetic disk; The magnetic head slider is placed obliquely above the super-slip pad, and the distance between the read / write head and the magnetic medium layer of the magnetic disk is height-adjusted so that the distance is adjusted to be less than or equal to a preset head-disk distance; The adjusted spacing is maintained and the adhesive material in the connecting material is cured.

13. The method for preparing a hard disk head according to claim 12, It is characterized in that The height adjustment process of the distance between the read / write head and the magnetic medium layer of the disk includes: A height-fixing cushion layer having a thickness of a target height is arranged on the upper surface area of ​​the magnetic disk near the read / write head, the height-fixing cushion layer is used to cause the magnetic head slider to undergo plastic deformation so as to fix and connect the super slider, and the target height is the distance between the read / write head and the upper surface of the magnetic disk whose value is less than the preset head-disk distance value; Determining the distribution position of the super-sliding sheet relative to the read / write head according to the thickness of the super-sliding sheet and the height-fixing cushion layer; The height determining cushion layer is removed and the adhesive material in the connecting material is cured, so that the read / write head is placed above the disk surface at the target height.

14. The method for preparing a hard disk head according to claim 13, It is characterized in that The height-fixing cushion layer is made of 1 to 10 layers of graphene.

15. The method for preparing a hard disk head according to claim 12, It is characterized in that The connecting material further includes a deposition material; after preparing the magnetic head slider having a read / write head disposed on one side, and before performing a height adjustment process on the distance between the read / write head and the upper surface of the magnetic disk, the method further includes: The deposition material is laid on the bottom surface of the magnetic head slider to form a deposition layer with a preset deposition angle, where the deposition angle is an inclination angle of the bottom surface of the deposition layer relative to a horizontal plane.

16. The method for preparing a hard disk head according to claim 15, It is characterized in that The height adjustment process includes: The distribution position of the super-slip sheet relative to the read / write head is adjusted according to the thickness of the super-slip sheet and the deposition layer, and the distance between the read / write head and the magnetic medium layer of the disk on which the super-slip sheet is placed is regulated in cooperation with the displacement device to adjust the distance to be less than or equal to the preset head-disk distance.

17. The method for preparing a hard disk head according to any one of claims 12 to 16, It is characterized in that Also included is a high degree of recognition of the spacing between the read / write head and the magnetic medium layer of the disk: Pre-storing magnetic signals in the magnetic disk; The magnetic signal is read by the read / write head, and if the strength of the magnetic signal reaches a preset value, it is determined that the read / write head is placed above the upper surface of the magnetic disk at a target height.

18. A hard disk, It is characterized in that The hard disk comprises a head arm, a magnetic disk and a hard disk head as claimed in any one of claims 1 to 11, wherein the magnetic disk has no lubricating layer, and the head arm is connected to one end of the magnetic disk head.

19. The hard disk according to claim 18, It is characterized in that The magnetic head arm is used to control the hard disk magnetic head to fly away from the magnetic disk or to slide against the magnetic disk.

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