KR20040077058A - Slider for optical head - Google Patents

Abstract

PURPOSE: A slider for an optical head is provided to reduce pollutants which can be accumulated in a lower part of an optical lens while preventing the pollutants from being accumulated on an ABS(Air Bearing Surface). CONSTITUTION: One pair of rails(122,122) are formed in a lower front portion of a slider member(100). One pair of rails(123,123) are formed in a rear portion of the slider member(100). A lower part of an optical lens(124) is disposed between the front rails(122,122) and the rear rails(123,123). Rear parts of the front rails(122,122) are inclined to have inclined surfaces(122a,122b). Rear parts of the rear rails(123,123) are formed so as to have inclined surfaces(123a,123b).

Description

Slider for optical head {SLIDER FOR OPTICAL HEAD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slider for an optical head, and more particularly, to a slider for floating optical recording / reproducing at a constant distance from a disk, in which contaminated particles are accumulated on an air bearing surface (ABS) or a beam from a laser diode is placed on the disk. The present invention relates to a slider for an optical head in which contaminant particles generated when irradiated can reduce contaminant particles that can accumulate under the optical lens to increase reliability and durability of an optical recording / reproducing drive.

Background Art Conventionally, optical discs in which information recording / reproducing is performed by irradiating light onto a signal recording surface, such as a magneto-optical disc, a phase change type disc, or the like, have been proposed. In these optical disks, in order to be able to record as much information as possible, a high density of recording density is actively performed.

In addition, with such high density of optical discs, attempts have also been made to improve the recording density by reducing the spot diameter of light irradiated onto the signal recording surface of the optical disc even for the optical pickup for recording / reproducing signals to and from the optical disc. .

In particular, in recent years, an optical head slider is constructed by applying an optical lens to a slider member by applying a technique of a floating head slider in a hard disk device or the like. That is, while the optical head slider floats on the signal recording surface of the optical disk with a predetermined floating amount, the light collected by the optical lens mounted on the optical head slider is irradiated onto the signal recording surface of the optical disk, It has been proposed to record and reproduce a signal to a disc.

In the optical disk apparatus, when such a slider for the optical head is used, the distance between the optical lens and the signal recording surface of the optical disk is compared with the case where the light from the optical head without the slider is irradiated to the signal recording surface of the optical disk. This can greatly shorten it. As a result, it becomes possible to use a high NA (aperture number) lens, and it is possible to reduce the spot diameter of light irradiated onto the signal recording surface of the optical disk.

Here, an example of the optical head slider as described above is shown in FIG. The slider 100 for an optical head shown in FIG. 1 includes a slider member 102 which floats and travels on the magneto-optical disk 101 at the time of recording / reproducing a signal for the magneto-optical disk 101, and the slider member ( The objective lens 103 bonded to the 102 is provided. In addition, an optical fiber 104 and a polarization mirror 105 are incorporated in the slider member 102. The laser beam L guided by the optical fiber 104 is incident on the objective lens 103 through the polarization mirror 105, and is collected by the objective lens 103 to signal the recording layer of the magneto-optical disk 101. It is supposed to irradiate 101a.

The slider member 102 is formed with a thin film coil 106 for applying a magnetic field to the magneto-optical disk 101 during recording, and a terminal 107 electrically connected to the thin film coil 106. . The thin film coil 106 is formed as a thin film so that the periphery of the objective lens 103 is wound around the lower surface side facing the magneto-optical disk 101 of the slider member 102. On the other hand, the terminal 107 is formed by filling the inside of the hole 108 formed through the slider member 102 in the thickness direction to the position where the slider member 102 is in contact with the thin film coil 106.

Moreover, this slider member 102 is attached to the front end of a supporting arm 109 provided in the optical disk apparatus, and the supporting arm 109 is driven to rotate in the radial direction of the magneto-optical disk 101. As a result, the magneto-optical disk 101 that is rotated is scanned.

The slider 100 for the optical head configured as described above receives the air flow generated by the rotation of the magneto-optical disk 101, and the slider member 101 is floated on the magneto-optical disk 101 with a predetermined floating amount. Is irradiated to the signal recording layer 101a of the magneto-optical disk 101 to record the information signal for the magneto-optical disk 101. Play it. At the time of recording, the thin film coil 106 generates a magnetic field having a predetermined intensity, and the magnetic field is applied to a portion to which the laser beam L of the signal recording layer 101a of the magneto-optical disk 101 is irradiated. .

The optical head slider 100 is formed with a hole that penetrates the slider member 102 in the thickness direction, and an objective lens is fitted to the hole, and the glass fusion or UV (ultraviolet) curable adhesive 110 is formed. It is fixed by.

If the lens of the slider for the optical head used in the conventional storage device as described above is contaminated, the recording / reproduction is seriously affected, and the slider becomes unstable due to contaminated particles accumulated in the ABS of the slider. In this case, there are contaminations caused by the accumulation of contaminated particles generated during contact between the optical slider and the disk together with externally contaminated particles, and contaminations in which the particles of the lubricating layer evaporated during laser irradiation accumulate in the lens portion. However, the conventional method for minimizing the problem caused by contaminating particles has not been applied to the slider for the optical head.

2 and 3 are bottom and longitudinal cross-sectional views showing an ABS structure of a slider used for magnetic recording of a hard disk drive. Rails 120 and 121 are provided on the bottom of the slider member 100. Is formed, and the coil 130 is provided in the rear end part of the rail 121. As shown in FIG.

When designing such a conventional slider, ABS was designed with emphasis on the rise of the slider. In the case of a hard disk drive, ABS was designed to shield the inside or install an air filter to reduce contamination from the outside. When it did, it did not apply an alternative to pollution.

However, compared to the hard disk drive, in the optical recording / reproducing drive to be used as a detachable, it is exposed to the outside, so contaminants are easily introduced, and the temperature of the surface of the disk is increased to several hundred degrees instantaneously by using a laser. Contamination may occur due to evaporation of the particles.

Therefore, in the environment in which contaminant particles easily flow as shown in FIGS. 2 and 3, the contaminant particles C accumulate in the stepped portions while the rails 120 and 121 are perpendicular to the flow of air. This phenomenon occurs as the negative pressure is generated in the stepped portion, as shown in the side cross-sectional view of the slider, whereby contaminant particles (C) accumulate in this portion. This will not work smoothly. In addition, in the case of a hard disk, since contaminated sites accumulate in the magnetic coils, the contaminated particles can seriously affect the recording and reproducing functions of the magnetic coil. Therefore, there is a need for a method that can minimize such problems.

The present invention has been made to solve the above-mentioned problems and defects, the contaminated particles are accumulated on the air bearing surface (ABS) in the slider for the optical recording / playback while maintaining a constant distance from the disk Provides a slider for an optical head that can reduce contaminants generated when a beam from a laser diode is irradiated onto a disk, which can accumulate in the lower part of the optical lens, thereby increasing the reliability and durability of the optical recording / reproducing drive. The purpose is to.

1 is a longitudinal sectional view showing a configuration of a slider for a conventional optical head.

Figure 2 is a bottom view showing the ABS of the slider for a conventional optical head.

Figure 3 is a longitudinal sectional view showing the ABS of the slider for a conventional optical head.

Figure 4 is a bottom view showing the ABS of the slider for optical head according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: slider member 122,123: front and rear rail

122a, 123a: inner inclined surface 122b, 123b: outer inclined surface

D: spacing S1, S2: space

In order to achieve the above object, the ABS of the slider according to the present invention has two rails at the front and two at the rear, and the bottom of the optical lens is disposed at the bottom between the rails.

As with the slider for the conventional optical head, it can be seen that a large amount of contaminants accumulate when the rear edge of the rail is designed perpendicular to the direction of the air flow.In order to prevent such contamination, the rear and rear portions of the front rail are accumulated. The slanted design of the first half of the rail allows the flow of air inside the slider to occur along the edge of the rail, minimizing the accumulation of contaminants.

In addition, by minimizing the flow of air flowing from the side of the slider to minimize the inflow of contaminant particles to the slider in other parts than the front of the slider.

Therefore, it is expected to minimize the problems caused by contaminated particles by designing the rail to have inclined edges in the ABS shape.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail as follows.

Figure 4 shows a bottom view showing the ABS of the slider for the optical head according to the present invention, as shown in the pair of rails 122, 122 is formed in the front of the bottom surface of the slider member 100 In the rear, a pair of rails 123 and 123 are provided, and between the front rails 122 and 122 and the rear rails 123 and 123 of the optical lens 124 The lower part is disposed, and the rear half of the front rails 122 and 122 is inclined to have the inclined surfaces 122a and 122b, and the rear half of the rear rails 123 and 123 to the inclined surfaces 123a, It is a structure formed so that it has 123b.

Further, a predetermined distance D is maintained between the front rails 122 and 122 and the rear rails 123 and 123 of the slider member 100, and the front rails 122, ( A space portion S1 of a predetermined interval is provided between the 122, and a space portion S2 of a predetermined interval is provided between the rear rails 123 and 123, and an inclined surface 122a of the inner side thereof is provided. 123a is formed to have a longer width than the outer inclined surfaces 122b and 123b.

Like the sliders for the conventional optical head shown in FIGS. 2 and 3, it can be seen that a large amount of contaminant particles accumulate when the ends of the rails 120 and 121 are designed to be stepped perpendicular to the direction of the air flow. In order to prevent such contamination, the rear half of the front rails 122 and 122 is inclined to have the inclined surfaces 122a and 122b as shown in FIG. 4, and the rear half of the rear rails 123 and 123. Is formed to have inclined surfaces 123a and 123b so that the flow of air in the slider is inclined surfaces 122a and 122b of the front rails 122 and 122 and the rear rails 123 and 123. By minimizing the accumulation of contaminant particles by generating them along 123a and 123b, and minimizing the flow of air from the side of the slider, contaminant particles enter the slider other than the front of the slider. Minimized.

As described above, the present invention arranges a pair of rails at the front and rear of the bottom portion of the slider for the optical head for floating optical recording / reproducing at a constant distance from the disk, and air flows on each rail. By forming an inclined surface to induce a smooth flow without congestion, contaminated particles are accumulated on the air bearing surface (ABS) or contaminated particles generated when the beam from the laser diode is irradiated onto the disk to be accumulated under the optical lens. There is an advantage that can increase the reliability and durability of the optical recording / reproducing drive by reducing the number of contaminants.

Claims (2)

A pair of front rails 122, 122 and rear rails 123, 123 are formed at the front and rear of the bottom of the slider member 100 of the slider for the optical head, respectively. Optical heads formed by forming inclined surfaces 122a, 122b, 123a, and 123b at the rear half of the 122 and 122, and the first half of the rear rails 123 and 123, respectively. Dragon slider. According to claim 1, A predetermined distance (D) is maintained between the front rail 122, 122 and the rear rail 123, 123 of the slider member 100, the front rail A space portion S1 of a predetermined interval is provided between the 122 and 122, and a space portion S2 of a predetermined interval is provided between the rear rails 123 and 123. A slider for an optical head, wherein the inner inclined surfaces 122a and 123a of the rear rails 122 and 123 are formed to have a longer width than the outer inclined surfaces 122b and 123b.