KR100265942B1 - Apparatus for recording/reading out information on to/from information media - Google Patents

Abstract

PURPOSE: A writing and reading mechanism of a disk drive is provided to improve data write density and minimize friction and abrasion of a disk by writing/reading digital data on the disk with a write/read header. CONSTITUTION: Plural first piezoelectric actuators(130) have first electrodes and second electrodes at both sides perpendicular to a disk(110). When the disk is rotated, voltage is fed to the first and the second electrodes. Each piezoelectric thin film is bent horizontally on the disk, and the first piezoelectric actuators are bent. A write/read header is moved in a radial direction of the disk depending on the bending degree of the first piezoelectric actuators. At least one support member(150) forms plural fixed portions of the first piezoelectric actuators. At least one second piezoelectric actuator is bent to move the support member in a perpendicular direction of the disk. The data write density of the disk is improved by contact between the header and the disk with the piezoelectric actuators.

Description

Recording and reading devices for information storage equipment

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording and reading device for an information storage device, and more particularly, wherein a plurality of heads write or read digital data to or from a disk by means of a proximity contact method or a contact method using a plurality of piezoelectric actuators. A recording and reading device for an information storage device which can improve the data recording density of a disc, minimize the friction and wear of the disc and shorten the data access time.

In recent decades, significant advances have been made in the technology for storing or reading digital data using magnetic disks in computer systems. This magnetic disk recording and reading technique generally accesses the data track on the magnetic disk by means of a recording and reading head mounted on the head slider to draw digital data by magnetic action between the recording and reading head and the corresponding sector of the data track. Write or read.

1 and 2 schematically show a recording and reading apparatus for a typical disk drive. As shown in FIGS. 1 and 2, the recording and reading apparatus includes a recording and reading head 20, a head slider 30 on which the recording and reading head 20 is mounted, and a head slider 30. The rotary actuator 40 which rotates is provided.

The recording and reading head 20 is composed of small electromagnets having a gap opposite the magnetic disk 10, and the suspension arm 50 is rotated when the magnetic disk 10 rotates at a constant speed during operation of the apparatus. The recording and reading head 20 is pivoted about the pivot axis so that the recording and reading head 20 is positioned above the magnetic disk 10 between the magnetic disk 10 and the recording and reading head 20, that is, a predetermined flying height. The data track on the magnetic disk 10 is accessed by moving while maintaining.

In order to move the recording and reading head 20 over the magnetic disk 10 to a predetermined flight height when the magnetic disk 10 rotates, the recording and reading head 20 is an air bearing head slider 30. ) Is mounted. The air bearing head slider 30 is fixed to the suspension arm 50 mounted to the rotary actuator 40, the front lower edge of which is cut to form an inclined surface. As the magnetic disk 10 rotates, the head slider 30 is subjected to an aerodynamic lift force caused by the air flow generated by the rotation of the magnetic disk 10, thereby flying a predetermined height above the surface of the disk. Done. Suspension arm 50 has a suitable elastic mechanism to maintain a predetermined distance between the rotating magnetic disk 10 and the head slider 30 when the head slider 30 is lifted by air flow.

The flight height of the head slider 30 is determined by the aerodynamic lift force described above and the initial static load given by the suspension arm 50. From the magnetic point of view, the closer the distance between the recording and reading head 20 and the magnetic disk 10 is, the higher signal resolution and recording density is achieved, so that the recording and reading head 20 is magnetic. It is necessary to fly at the position as close as possible to the disk 10.

In the first disc drives designed in the 1950s, the recording and reading heads were supported by compressed air bearings and the gap between the head slider and the disk was more than 25 µm, but due to advances in technology for high recording density and air bearing theory Air bearings have been replaced by self-acting air bearings so that the spacing between the head slider and the disk interface continues to decrease.

Another breakthrough in the field of disk drive technology was made by the so-called "contact start-stop technology (CSS technology)," also known as "Winchester technology." The light load head slider is spring loaded against the recording and reading head and the air bearing functions while the disk spins up, ie the magnetic disk and head slider In contact, the operation of the disc drive is started and stopped.

However, with Winchester technology, the friction and wear of sliders and magnetic disks has become a problem because the interface of magnetic disks must withstand at least thousands of start / stop cycles during the life of the disk drive. In addition, the interface of the magnetic disk needs to have sufficient roughness to prevent the head slider from sticking to the magnetic disk while the disk drive is not operating.

On the other hand, in order to prevent the head slider from contacting the magnetic disk during the start / stop operation of the disc drive, a loading device for a disc drive using a ramp mechanism has been developed and used. In a loading device for a disc drive using such a ramp mechanism, the ramp mechanism supports a part of the suspension arm while the disc drive is not operating.

US Pat. No. 5,394,281, issued February 28, 1995, to Kiriro Kajitani entitled "Head loading / unloading mechanism for recording and reading with vibrating lamps." Disclosed is a suspension mechanism of a disk drive composed of a vibration mechanism provided with a piezoelectric element.

According to the apparatus of the cassette, when the disc drive is inactive, the suspension arm is supported by a piezoelectric element that forms part of the lamp mechanism so that the head slider maintains a predetermined distance from the upper surface of the magnetic disk. On the other hand, when the loading operation is started, a high frequency voltage forming a sine wave is applied to the piezoelectric element to vibrate the piezoelectric element finely. According to the apparatus of the above-described cassette, the friction is reduced by replacing the static frictional force acting on the support of the head slider and the ramp mechanism when the loading is started, by the dynamic frictional force.

However, in the above-described recording and reading apparatus for a disk drive, one recording and reading head reads or writes a magnetic signal from the corresponding data sector of the data track so that the recording and reading head can access the desired data track. It takes a long time. As a result, the slider needs to be moved more quickly by the rotary actuator to reduce the access time, but due to the suspension mechanism and the inertial force of the slider, there are some limitations in controlling the position of the recording and reading head quickly and accurately. There is.

In addition, various efforts have been made in the above-described Winchester-type disc drive or the apparatus of Kasitani to adjust the distance between the recording and reading head and the magnetic disk during operation or stoppage to solve the friction, wear and sticking problem. Too complicated the structure of the increase the manufacturing cost.

Accordingly, one object of the present invention is to provide a recording and reading apparatus for a disk drive that can shorten data access time by using a plurality of recording and reading heads mounted on a piezoelectric actuator. Another object of the present invention is to enable the recording and reading head to write or read digital data to or from the magnetic disk by means of the proximity contact method or the contact method, thereby improving data recording density and minimizing friction and wear of the magnetic disk. A recording and reading device for an information storage device is provided.

1 is a plan view showing a conventional recording and reading apparatus for a disc drive.

FIG. 2 is a partial perspective view for explaining the recording and reading apparatus for the disk drive of FIG.

3 is a plan view for explaining the recording and reading apparatus for a disk drive according to the present invention.

4 is a perspective view for explaining a first piezoelectric actuator used in a recording and reading apparatus according to an embodiment of the present invention.

5 is a perspective view illustrating a second piezoelectric actuator on which a supporting member is mounted according to an embodiment of the present invention.

6 is a schematic diagram showing a case where a recording and reading apparatus for a disc drive according to an embodiment of the present invention uses three piezoelectric actuator support members.

7A and 7B are a perspective view and a sectional view for explaining an example of a piezoelectric actuator used in a recording and reading apparatus for a disk drive according to another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

110: disk 120: recording and reading head

130: first piezoelectric actuator 132: piezoelectric thin film

134: first electrode 136: second electrode

138: third electrode 140: fourth electrode

150 support member 160 second piezoelectric actuator

In order to achieve the above-described objects of the present invention, the recording and reading apparatus for a disc drive according to the present invention comprises: (i) a piezoelectric thin film 132, and ii) a surface of the disk 110 of the piezoelectric thin film 132 orthogonal. And a first electrode 134 and a second electrode 136 formed on both sides of the direction, and the first electrode 134 and the second electrode 136 according to an electrical signal while the disk 110 rotates. A plurality of first piezoelectric actuators 130 and the plurality of first piezoelectric actuators which are bent and deformed by applying a voltage between the piezoelectric thin films 132 and a bending deformation in a horizontal direction with the surface of the disk 110. Mounted at the free ends of the 130, respectively, in accordance with the bending amount of the first piezoelectric actuator 130 causing bending deformation in accordance with the electrical signal is actually moved in the radial direction of the disk 110 to the disk 110 To a certain width in the radial direction A recording and reading head 120 for recording or reading data in association with a track to be read, for recording or reading data by magnetic action with a corresponding data sector while the disk 110 is rotating. At least one support member 150 formed by a fixed end of the first voltage actuator 130 spaced apart by a predetermined distance, and the recording and reading head 120 mounted on the first piezoelectric actuator 130 Move in a direction orthogonal to the surface of the disk 110, and after writing and reading, the direction orthogonal to the first piezoelectric actuator 130 so that the recording and reading head 120 is moved back to its original position. The support member 150 is mounted, and at least bending deformation so that the support member 150 moves in a direction orthogonal to the surface of the disk 110 by the applied voltage. One second piezoelectric actuator 160 is included.

In addition, in order to achieve the object of the present invention, a disk drive recording and reading apparatus according to the present invention includes: i) a piezoelectric thin film 132, ii) a direction orthogonal to the surface of the disk 110 of the piezoelectric thin film 132; The first electrode 134 and the second electrode 136 and iii) formed on both sides of the third electrode 138 and the third electrode 138 formed on both sides of the piezoelectric thin film 132 in a direction parallel to the surface of the disk 110. Four electrodes 140 are provided, and a voltage is applied between the first electrode 134 and the second electrode 136 according to an electrical signal while the disk 110 rotates, so that the piezoelectric thin film 132 is formed. The plate 110 is bent and deformed in a horizontal direction, and at the time of writing and reading, a voltage is applied between the third electrode 138 and the fourth electrode 140 according to an electrical signal, thereby providing the piezoelectric thin film 132. Is bent and deformed toward the surface of the disc 110, and after writing and reading, By removing the voltage applied between the third electrode 138 and the fourth electrode 140, the plurality of first piezoelectric actuator 130, which is moved back to the original position by the elastic force of the piezoelectric thin film 132, Each of the plurality of first piezoelectric actuators 130 is mounted on the free ends of the plurality of first piezoelectric actuators 130 and the radial direction of the disk 110 in accordance with the amount of bending of the first piezoelectric actuator 130 causing bending deformation in accordance with the electrical signal and the Moves in a direction orthogonal to the surface of the disc 110 and performs recording and reading in association with a track located at a predetermined width in the radial direction of the disc 110, and with the corresponding data sector while the disc 110 rotates. The recording and reading head 120 for recording or reading data by magnetic action, and the fixed ends of the plurality of first piezoelectric actuators 130 are spaced apart by a predetermined distance, respectively. A includes at least one support member (150).

According to another feature of the invention, the means for moving the recording and reading head toward the interface of the disk is a third electrode formed on one side in the vertical direction of the piezoelectric thin film, the second formed on the other side in the vertical direction of the piezoelectric thin film It is a common electrode formed in 4 electrodes and the said piezoelectric thin film.

According to another feature of the present invention, the piezoelectric thin film of the piezoelectric actuator is in the shape of a hollow rectangular pillar, the first to fourth electrodes are formed on the outer peripheral surface of the piezoelectric thin film and the common electrode is inside the piezoelectric thin film. Is formed.

According to the present invention, the use of a plurality of heads shortens the time taken for the recording and reading heads to access the desired data tracks and perform writing and reading. In addition, since the spacing between the disk and the recording and reading head is actively controlled by using a piezoelectric actuator, the head can be brought into close contact or contact with the disk to improve the data recording density of the magnetic disk. In addition, friction and wear of the magnetic disk are minimized by ensuring that the head is in close contact with or in contact with the disk only when necessary and at some distance from the magnetic disk.

Further, when the plurality of piezoelectric actuator support members are arranged along the radial direction of the disc at a predetermined angle in the circumferential direction of the disc, the time for the recording and reading head to access the corresponding data sector of the desired track can be further shortened. have. As a result, the burden of rotating the disk at high speed is reduced.

The driving range of the piezoelectric actuator according to the present invention is several micrometers or less and is therefore superior in terms of precise position control, reliability, vibration, and noise as compared to a system using a conventional bearing and voice coil. In addition, the piezoelectric actuator of the present invention has the advantage that the system itself can be miniaturized because it is manufactured using a MEMS technology that can miniaturize the piezoelectric element.

Hereinafter, a recording and reading apparatus for an information storage device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic plan view of a recording and reading device for an information storage device according to the present invention, FIG. 4 is a perspective view for explaining a piezoelectric actuator among the devices shown in FIG. 3, and FIG. An enlarged perspective view of 'C' part.

3 to 5, a recording and reading apparatus for an information storage device according to the present embodiment includes a plurality of recording and reading heads 120 and a plurality of recording and reading heads 120 mounted at a free end thereof. Two first piezoelectric actuators 130, at least one supporting member 150 to which fixed ends of the first piezoelectric actuators 130 are fixed, and at least one second piezoelectric actuator 160 to which the supporting members 150 are mounted. It includes.

The recording and reading head 120 records and reads data by magnetic action with a corresponding data sector of the track while the recording medium such as the magnetic disk 110 is rotating. do. The recording and reading head 120 is mounted at the free end of the first piezoelectric actuator 130 and actually moves in the radial direction of the disc 110 and is a group of data tracks positioned at a predetermined width in the radial direction of the disc 110. Perform write and read functions in association with According to the present invention, the use of the plurality of recording and reading heads 120 reduces the time taken for the recording and reading heads 120 to access a desired data track.

The support member 150 to which the first piezoelectric actuator 130 is fixed is disposed in the radial direction of the disk, and each first piezoelectric actuator 130 is spaced apart from the adjacent first piezoelectric actuator 130 at a predetermined interval. . The first piezoelectric actuator 130 is also secured to the support member 150 to be parallel to the circumferential tangent of the disk 110. According to the present invention, the first piezoelectric actuators 130 fixed to one support member 150 are spaced about 10 μm apart, thus about 100 writes and reads per 1 mm radial direction of the disc 110. The head 120 is disposed so that each write and read head 120 covers about 10 data track areas. Accordingly, the first electrode 134 and the first electrode 134 and the first and second piezoelectric actuators 130 mounted at their free ends are moved left and right within a range of about 5 占 퐉 in the radial direction of the disk. Voltage is applied to the two electrodes 136.

As shown in FIG. 4, each of the first piezoelectric actuators 130 includes a piezoelectric thin film 132 and a first electrode 134 and a piezoelectric thin film 132 formed on one side in the horizontal direction of the piezoelectric thin film 132. The second electrode 136 is formed on the other side in the horizontal direction. When a voltage is applied between the first electrode 134 and the second electrode 136 according to an electric signal while the disk 110 rotates, the piezoelectric thin film between the first electrode 134 and the second electrode 136 ( The first piezoelectric actuator 130 causes a predetermined amount of bending deformation from side to side by causing the bending deformation to one side of the horizontal direction.

The piezoelectric thin film 132 is made of a piezoelectric material such as ZnO, PZT (Pb (Zr, Ti) O ₃ ), or PLZT ((Pb, La) (Zr, Ti) O ₃ ), and the first electrode 134. ) And the second electrode 136 are formed using platinum (Pt), tantalum (Ta), or platinum-tantalum (Pt-Ta) having excellent electrical conductivity. According to the present invention, the first piezoelectric actuator 130 is manufactured by attaching a first electrode 134, a piezoelectric thin film 132, and a second electrode 136 on a silicon (Si) wafer. System).

The left and right bending deformation amounts of the first piezoelectric actuator 130 may be a voltage corresponding to an amount of the recording and reading head 120 fixed to the free end of the piezoelectric actuator 130 moving in the radial direction of the disk 110. It is determined by being applied between the first electrode 134 and the second electrode 136. That is, the electrical signal applied to the first piezoelectric actuator 130 controls the applied voltage, and as the first piezoelectric actuator 130 causes bending deformation to one side in the horizontal direction, the recording and reading head 120 may have desired data. In order to move over the track, it moves in the radial direction of the disc 110 by a predetermined distance.

At least one second piezoelectric actuator 160 on which the support member 150 is mounted is shown in FIG. 5. Referring to FIG. 5, the support member 150 to which the plurality of first piezoelectric actuators 130 are fixed is mounted to a second piezoelectric actuator 160 which is a bulk type piezoelectric actuator. The support member 150 is mounted to the second piezoelectric actuator 160 in a direction orthogonal to the first piezoelectric actuator 130. Therefore, as the second piezoelectric actuator 160 causes bending deformation to the left and right by the applied voltage, the support member 150 moves up and down in a direction perpendicular to the disc 110 so that the recording and reading head ( 120 is brought into close contact or contact with disk 110.

The left and right bending deformation amount of the second piezoelectric actuator 160 is a voltage corresponding to the amount that the recording and reading head 120 fixed to the first piezoelectric actuator 130 moves in the vertical direction with respect to the disk 110. It is determined by applying to the bulk second piezoelectric actuator 160. As in the case of the first piezoelectric actuator 130 described above, an electrical signal applied to the second piezoelectric actuator 160 controls the applied voltage, and the second piezoelectric actuator 130 is orthogonal to the first piezoelectric actuator 130. As the bending deformation is caused to one side or the other side of the direction, the recording and reading head 120 moves up and down with respect to the disc 110 by a predetermined distance.

6 shows a case where the recording and reading apparatus for a disc drive according to the present invention uses three supporting members. According to the present invention, it is possible to use a plurality of support members 150. As described above, when the plurality of first piezoelectric actuators 130 are disposed on the plurality of support members 150, the time for the recording and reading head 120 to access the corresponding data sector of the desired track can be further shortened. have.

Referring to FIG. 6, the recording and reading apparatus for a disc drive according to the present invention is provided with three supporting members 150 to which the first piezoelectric actuators 130 are fixed in the same arrangement, and each supporting member 150 is The second piezoelectric actuator 160 is mounted to be spaced apart by 120 ° in the circumferential direction of the adjacent support member 150 and the disk 110.

When the disc 110 rotates, three first piezoelectric actuators 130 disposed at the same radial position among the first piezoelectric actuators 130 fixed to the three supporting members 150 are used for recording and reading according to an electric signal. The head 120 is bent and deformed to move to the desired track position, and the data sector is accessed by the three writing and reading heads 120 so that the data sector is accessed as compared with the case of one support member 150. Mean time is reduced to ⅓.

That is, when one recording and reading head 120 is located on one data track, the disk sector rotates close to 360 ° at the maximum to come to the position of the recording and reading head 120 while the disk is rotating. If the three write and read heads 120 are located 120 degrees apart in the circumferential direction of the disc 110, a movement is required, but the corresponding data sectors are the three write and read heads 120. There is no need to rotate more than 120 ° to move to one of the positions. Therefore, the burden of rapidly rotating the disk 110 is reduced.

7A and 7B are a perspective view and a sectional view for explaining an example of a piezoelectric actuator used in a recording and reading apparatus for a disk drive according to another embodiment of the present invention.

7A and 7B, the piezoelectric thin film 132 of the piezoelectric actuator 130 is formed in the shape of a hollow square pillar. The common electrode 131 is formed inside the piezoelectric thin film 132 having a hollow rectangular pillar shape, and the first electrode 134 and the second electrode 136 are formed on the left outer circumferential surface and the right outer circumferential surface of the piezoelectric thin film 132. The third electrode 138 and the fourth electrode 140 are formed on the upper outer peripheral surface and the lower outer peripheral surface of the piezoelectric thin film 132.

The piezoelectric actuator 130 having such a structure is published in a paper by Takeshi Morita, et al., 1995, entitled "Ultrasonic Motor Using Cylindrical Bending Deformable Transducer Based on PZT Thin Film". . In this case, the common electrode 131 is made of titanium, and the third electrode 138 and the fourth electrode 140 are platinum, tantalum, similarly to the first electrode 134 and the second electrode 136. Or platinum-tantalum and the like.

When a voltage is applied between the first electrode 134 and the second electrode 136 according to an electric signal while the disk is rotating, the piezoelectric thin film 132 between the first electrode 134 and the second electrode 136 is turned on. The bending and deforming to one side of the horizontal direction mounted on the free end of the piezoelectric actuator 130, the recording and reading head 120 is moved over the desired data track. Subsequently, when a voltage is applied between the third electrode 138 and the fourth electrode 140 by another electrical signal, the piezoelectric thin film 132 is bent and deformed in the vertical direction so that the corresponding recording and reading head 120 is a disk. The recording and reading are performed while moving toward the interface of the 110 and in close contact with or in contact with the interface of the disk 110. Thus, when the piezoelectric actuator 130 capable of driving in the horizontal direction and the vertical direction is formed, there is no need for a bulk piezoelectric actuator for driving the support member 150 in the vertical direction.

After the writing and reading of the writing and reading head 120, another electrical signal is applied between the first electrode 134 and the second electrode 136 and between the third electrode 138 and the fourth electrode 140. The applied voltage is removed to restore the piezoelectric actuator 130 to its original position by the elastic force.

According to another embodiment of the present invention, the recording and reading head 120 is in the proximity or contact with the disk 110 due to the presence of the third electrode 138 and the fourth electrode 140. The recording density of the disc can be improved.

According to the recording and reading apparatus for the information storage device according to the present invention, unlike in the prior art, by using a plurality of heads, the time taken for the recording and reading head to access a desired data track to perform recording and reading is shortened. In addition, since the spacing between the disk and the recording and reading head is actively controlled by using a piezoelectric actuator, the head can be brought into close contact or contact with the disk to improve the data recording density of the magnetic disk. In addition, friction and wear of the magnetic disk are minimized by ensuring that the head is in close contact with or in contact with the disk only when necessary and at some distance from the magnetic disk.

In addition, when the plurality of piezoelectric actuator support members are disposed along the disc radial direction at a predetermined angle in the circumferential direction of the disc, the recording and reading head can further shorten the time for accessing the corresponding data sector of the desired track. Can be. As a result, the burden of rotating the disk at high speed is reduced.

The driving range of the piezoelectric actuator according to the present invention is several micrometers or less and is therefore superior in terms of precise position control, reliability, vibration, and noise as compared to a system using a conventional bearing and voice coil. In addition, the piezoelectric actuator of the present invention has the advantage that the system itself can be miniaturized because it is manufactured using a MEMS technology that can miniaturize the piezoelectric element.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (7)

A recording and reading apparatus for an information storage device for writing data to or reading from a data sector of a track of a disc, the method comprising: Iii) a piezoelectric thin film 132, and ii) a first electrode 134 and a second electrode 136 formed on both sides of the piezoelectric thin film 132 in a direction orthogonal to the surface of the disk 110. While the disk 110 is rotated, a voltage is applied between the first electrode 134 and the second electrode 136 according to an electric signal so that the piezoelectric thin film 132 is in a horizontal direction with the surface of the disk 110. A plurality of first piezoelectric actuators 130 which are bent and deformed by causing bending deformation; Each of the plurality of first piezoelectric actuators 130 is mounted on the free ends of the plurality of first piezoelectric actuators 130, and the radial direction of the disk 110 in accordance with the amount of bending of the first piezoelectric actuator 130 causing bending deformation in accordance with the electrical signal. Perform recording and reading in association with a track that is moved and located at a predetermined width in the radial direction of the disc 110, and writes or reads data by magnetic action with a corresponding sector of data while the disc 110 is rotating. Write and read head 120; At least one support member (150) formed at fixed intervals of the plurality of first piezoelectric actuators (130) spaced apart by a predetermined distance, respectively; And The recording and reading head 120 mounted on the first piezoelectric actuator 130 moves in a direction orthogonal to the surface of the disk 110, and after the writing and reading, the recording and reading head 120 The support member 150 is mounted in a direction orthogonal to the first piezoelectric actuator 130 so that the first member is moved back to its original position, and the support member 150 of the disk 110 is moved by an applied voltage. And at least one second piezoelectric actuator (160) which is bent and deformed to move in a direction orthogonal to the surface. According to claim 1, wherein the support member 150 is disposed along the radial direction of the disk 110, the first piezoelectric actuator 130 is spaced apart from the adjacent piezoelectric actuator 130 by a predetermined interval of the disk 110 A recording and reading device for an information storage device, characterized in that it is disposed on the support member (150) so as to be parallel to the circumferential tangent. The recording and reading apparatus for a disk drive is provided with a plurality of supporting members 150, and each of the supporting members 150 is provided with a plurality of materials each having a recording and reading head 120 mounted thereon. 1 A piezoelectric actuator (130) is fixed, and each support member (150) is disposed in the circumferential direction of the disc (110) spaced by a predetermined angle, characterized in that the recording and reading device for an information storage device. 4. The recording and reading apparatus according to claim 3, wherein each support member (150) is spaced apart at an angle of 120 ° in the circumferential direction of the disc (110). A recording and reading apparatus for an information storage device for writing data to or reading from a data sector of a track of a disc, the method comprising: Iii) the piezoelectric thin film 132, ii) the first electrode 134 and the second electrode 136 formed on both sides of the piezoelectric thin film 132 in a direction orthogonal to the surface of the disk 110, and iii) the piezoelectric thin film. And a third electrode 138 and a fourth electrode 140 formed on both sides of the disk 110 in a direction parallel to the surface of the disk 110, wherein the disk 110 is rotated according to an electrical signal. A voltage is applied between the first electrode 134 and the second electrode 136 so that the piezoelectric thin film 132 bends and deforms in a horizontal direction with the surface of the disk 110. Accordingly, a voltage is applied between the third electrode 138 and the fourth electrode 140 so that the piezoelectric thin film 132 is bent and deformed toward the surface of the disk 110. After writing and reading, the signal is applied to another signal. The voltage applied between the third electrode 138 and the fourth electrode 140 is removed to remove the voltage of the piezoelectric thin film 132. A plurality of first piezoelectric actuator 130 is moved back to its original position by seongryeok; Each of the plurality of first piezoelectric actuators 130 is mounted on the free ends of the plurality of first piezoelectric actuators 130 in accordance with the electrical signal, causing the bending deformation of the radial direction of the disk 110 and actually Moves in a direction orthogonal to the surface of the disc 110 and performs writing and reading in association with a track located at a predetermined width in the radial direction of the disc 110, and corresponding data sectors while the disc 110 rotates. A recording and reading head 120 for recording or reading data by magnetic action with; And And at least one support member (150) formed at fixed intervals of the plurality of first piezoelectric actuators (130) spaced apart by a predetermined distance, respectively. The piezoelectric thin film 132 of the piezoelectric actuator 130 has a hollow rectangular pillar shape, and includes the first electrode 134, the second electrode 136, and the third electrode 138. The fourth electrode (140) is formed on the outer circumferential surface of the piezoelectric thin film (132), the recording and reading device for the information storage device, characterized in that the common electrode (131) is formed inside the piezoelectric thin film (132). The method of claim 6, wherein the first electrode 134, the second electrode 136, the third electrode 138, and the fourth electrode 140 comprise platinum (t), tantalum (Ta), or platinum-tantalum ( And a common electrode (131) made of titanium, wherein the common electrode (131) is made of titanium (Pt-Ta).

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