KR20030066235A - Optical disc recorder - Google Patents

Abstract

PURPOSE: An apparatus for recording and playing an optical disk is provided to rise a slider at a certain height and strengthen a suspension controlling the slider by controlling a height of a gap according to strength of a magnetic power between the slider and the optical disk. CONSTITUTION: An optical disk(110) has a magnetic layer(113) formed on a substrate part(111) except a recording layer(112) to have a magnetic repulsive power with a magnetic layer of a slider. The slider is installed at the end of a swing arm to scan tracks of the optical disk, having the magnetic layer to rise at a minute gap by the magnetic repulsive power.

Description

Optical Disc Recording / Playback Device {OPTICAL DISC RECORDER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc recording / reproducing apparatus, and more particularly to an optical disc recording including a slider for floating a certain gap using magnetic repulsive force from the surface of an optical disc to record / reproduce information by a phase change method. / Playing device.

In general, a representative example of a recording medium using a slider is a hard disk. However, in the current optical storage method, miniaturization has been promoted, the swing arm method is used, and the slider is used to replace the focus servo. Are being proposed.

Hereinafter, the conventional optical disc recording / reproducing apparatus, as shown in FIGS. 1 and 2, has a swing arm 21 provided so as to reciprocally rotate with respect to the base of the optical disc recording / reproducing apparatus, and the swing arm 21 thereof. An actuator 23 providing rotational driving force to the slider and a slider mounted at the end of the swing arm 23 to scan the track of the optical disk 10 while being hydrodynamically inflated against the optical disk using air pressure. 25) and an optical head 30 provided on the slider 25 to form an optical spot on the optical disk 10 so that information can be recorded / reproduced optically.

The optical disk 10 includes a phase change type optical disk and a magneto-optical disk. When the optical disk is employed as the optical disk, the optical head 30 may include a coil 35 for magnetic field modulation. ) Is further provided.

The optical head 30 is formed of a light-receiving unit 40, a reflecting mirror 32, an objective lens 33 and a solid immersion lens or a solid immersion mirror (small) It is configured to include a lens 34.

2 illustrates a device employing a refractive type solid immersion lens as the small lens 34, and the small lens 34 has a large incident angle at which the light irradiated from the transmitter / receiver 40 is applied to the optical disk 10. As shown in FIG. By focusing, the size of the light spot formed on the optical disk 10 can be reduced.

The transmitter / receiver 40 includes a semiconductor laser, a photodetector, and an optical path converting means, wherein the optical path converting means directs the light emitted from the semiconductor laser toward the reflective mirror 32 and the optical disk ( The traveling path of the light is converted so that the reflected light reflected by 10 is returned to the photodetector.

The transmitter / receiver 40 irradiates a laser beam having a diameter suitable for the objective lens 33, and the reflection mirror 32 reflects the light incident from the transmitter / receiver 40 toward the objective lens 33.

The objective lens 33 focuses incident light onto the small lens 34, and the small lens 34 forms a near field on the optical disk 10.

3 and 4 show a slider structure of a conventional near field optical disc recording / reproducing apparatus. In the optical disc recording / reproducing apparatus for near field reproduction and recording, the lens units 33 and 34 are formed of an optical disc ( It is located in the center of the slider 25 with respect to the rotation direction of 10).

In addition, in order to employ such a floating slider 25 structure, it is hydrodynamic to oppose the optical disk 10 of the slider 25 so as to float the slider 25 within the near field range from the optical disk 10. An air bearing surface 36 for generating air pressure due to phosphorus action is formed.

However, in the case of the air bearing surface 36 used for the slider 25 of the conventional optical disc recording / reproducing apparatus, the rotation speed of the optical disc 10 is greatly influenced by the rotation speed of the optical disc 10. As a result, there is a problem that the design of the air bearing surface 36 of the slider 25 also needs to be changed.

In addition, when using a swing arm method and a cartridge method at the same time there is a problem that a lot of difficulties to design a ramp loader to securely put the slider 25 on the disk surface and to ensure the safety when loading.

In addition, when floating the slider 25 of the optical disc recording / reproducing apparatus using the conventional air bearing surface 36, the rigidity is reduced by reducing the weight of the suspension 26 attached to one side of the slider 25. There is a design problem of the suspension 26 according to.

In addition, there is a problem that the air layer in contact with the air bearing surface 36 becomes unstable due to the heat generated by the laser, which is an optical source, to break or affect the floating characteristics of the slider 25.

According to the present invention devised in order to solve the above problems, the design of the slider can be simplified, and the floating characteristics of the slider can be kept constant with respect to the driver's motion such as loading of the lamp while injuring the slider regardless of the rotation of the disk. It is an object to provide an optical disk recording / reproducing apparatus held.

1 to 4 show the structure of a conventional optical disc recording / reproducing apparatus,

1 is a plan view of a conventional optical disc recording / reproducing apparatus,

2 is a schematic diagram of a conventional optical disc recording / reproducing apparatus,

3 is a cross-sectional view schematically showing a state in which the slider slides the outer end of the optical disk,

4 is a rear view of the slider.

5 to 7 show a slide floating apparatus of the optical disk recording / reproducing apparatus according to the present invention,

5 is a perspective view of a slider,

6 is a partial cross-sectional view of an optical disk;

Fig. 7 is a diagram showing a slide floating state of the optical disc recording / reproducing apparatus.

* Description of the main parts of the drawings *

110: optical disk 111: substrate portion

112: recording layer 113, 127: magnetic layer

125: slider

In order to achieve the above object, the present invention is characterized in that it comprises an optical disk having a magnetic layer formed on the substrate portion, and a slider having a magnetic layer formed on the opposing surface of the optical disk so that a small gap is raised by the repulsive force of the magnetic layer of the optical disk. Is achieved by an optical disk recording / reproducing apparatus.

Here, the gap in which the slider is lifted from the surface of the optical disk is more effectively controlled by the strength of the repulsive force of each magnetic layer.

Further, the magnetic layer of the slider preferably forms a magnetic layer by attaching a magnetic body to a thin thin plate on the opposing surface of the optical disk.

Hereinafter, the structure and function of the optical disk recording / reproducing apparatus of the present invention will be described in detail with reference to the drawings.

5 is a perspective view of a slider of the optical disc recording / reproducing apparatus of the present invention, FIG. 6 is a partial cross-sectional view of an optical disc applied to the optical disc recording / reproducing apparatus of the present invention, and FIG. 7 is an optical disc recording / reproducing apparatus of the present invention. A diagram showing a slide floating state of the playback device.

The optical disc recording / reproducing apparatus of the present invention, as shown in Figs. 5 to 7, has a swing arm provided so as to be reciprocally rotated with respect to the base of the optical disc recording / reproducing apparatus, and to provide rotational driving force to the swing arm. An actuator and a slider 125 mounted at the end of the swing arm and optically mounted to the slider 125 to scan the track of the optical disk while being hydrodynamically inflated against the optical disk using air pressure to record information optically. And an optical head for forming an optical spot on the optical disk so as to be reproduced.

The slider 125 is formed with a magnetic layer 127 on the opposing face of the optical disc to face the direction of the magnetic force downward.

In addition, the slider 125 of the magnetic layer 127 attaches a thin magnetic thin plate to the optical disk opposing surface of the slider 125 or forms a forming member of the slider 125 as a magnetic material so that the magnetic force is directed downward. It is also easy to consider.

By forming the magnetic layer 127 on the opposing surface of the slider 125, the optical magnetic disk, which is an existing hard disk, may cause data to be erased. In the case of the disc 110, data is not lost due to magnetic force.

The optical disk 110 forms the magnetic layer 113 on the substrate 111 except for the phase change recording layer 112 to form a magnetic layer 113 with the magnetic layer 127 of the slider 125 so as to have a magnetic repulsive force. Let 125 be floated into the fine gap G.

In addition, the magnetic layer 113 may be formed differently according to the formation height of the recording layer 112 varying from the bottom of the substrate 111 according to the type of the optical disc 110. It is desirable to be variable.

In the drawing, reference numeral 126 denotes a suspension, and 133 denotes an objective lens.

By such a configuration, the optical disk recording / reproducing apparatus of the present invention has an optical disk so as to have a repulsive force with respect to the magnetic force of the slider 125 and the slider 125 in which the magnetic layer 127 is formed on the optical disk opposing surface of the slider. The magnetic layer 113 is formed on the 110 to allow the slider 125 to rise while maintaining a predetermined gap G from the optical disk.

In addition, since the slider 125 floats while the optical disk 110 maintains a constant gap G by a magnetic force from the surface, the optical disk 110 is not affected by the rotational speed, and even the optical disk ( Even in the stationary state of 110, it maintains a certain gap (G), even if applied to the swing arm method and the cartridge method, respectively, it is possible to ensure the stability during loading.

In addition, the height of the gap G may be adjusted according to the strength of the magnetic force of the slider 125 and the optical disk 110, so that the weight of the slider 125 may be limited in designing the suspension 126 to control the slider 125. As a result, the degradation in rigidity generated can be eliminated, and other modes affecting the control occurring in the suspension 126 can be reduced, thereby facilitating the design of the suspension 126.

As described above, according to the present invention, by placing a magnetic layer having a magnetic force on the optical disk and the slider which are not affected by magnetic force in recording or playback, the slider can be raised to a certain height on the surface of the disk by using the repulsive force between the two. And even if the optical disc is stationary, a certain height of injury can be obtained.

In addition, the height of the gap can be adjusted according to the strength of the magnetic force of the slider and the optical disk, thereby increasing the rigidity of the suspension controlling the slider, and reducing the other modes affecting the control occurring in the suspension. It has the effect of easy design.

Claims (3)

An optical disk formed by including a magnetic layer in a substrate portion, And a slider having a magnetic layer formed on an opposing surface of the optical disk such that a minute gap is floated by a repulsive force with the magnetic layer of the optical disk. The optical disc recording / reproducing apparatus according to claim 1, wherein the gap at which the slider is lifted from the surface of the optical disc is adjusted by the intensity of the repulsive force of each magnetic layer. The optical disc recording / reproducing apparatus according to claim 1, wherein the magnetic layer of the slider is formed by attaching a thin thin plate magnetic material to an opposing surface of the optical disc.