WO2001016949A1 - Tete optique - Google Patents
Tete optique Download PDFInfo
- Publication number
- WO2001016949A1 WO2001016949A1 PCT/JP2000/005668 JP0005668W WO0116949A1 WO 2001016949 A1 WO2001016949 A1 WO 2001016949A1 JP 0005668 W JP0005668 W JP 0005668W WO 0116949 A1 WO0116949 A1 WO 0116949A1
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- WO
- WIPO (PCT)
- Prior art keywords
- slider
- optical waveguide
- arm
- waveguide mechanism
- optical
- Prior art date
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- 230000003287 optical effect Effects 0.000 title claims abstract description 181
- 230000007246 mechanism Effects 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 18
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/139—Numerical aperture control means
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/122—Flying-type heads, e.g. analogous to Winchester type in magnetic recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1384—Fibre optics
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/0857—Arrangements for mechanically moving the whole head
- G11B7/08576—Swinging-arm positioners
Definitions
- the present invention makes use of optical interaction in a minute area on a medium to reproduce structural or optical information formed in the minute area and to record information in the minute area.
- the present invention relates to an optical head for an information recording / reproducing device capable of reproducing and recording high-density information.
- Information recording / reproducing devices using light have evolved in the direction of large capacity and small size, and therefore, higher density of recording bits is required.
- As a countermeasure research using a blue-violet semiconductor laser and SIL (Solid Immersion Lens) has been conducted.However, due to the problem of the diffraction limit of light, these technologies can improve only several times the current recording density. I can't hope.
- an information recording / reproducing method using near-field light is expected as a technique for handling optical information in a minute area exceeding the diffraction limit of light.
- This technique utilizes near-field light generated by the interaction between a minute area and an optical aperture having a size equal to or smaller than the wavelength of light formed in an optical head. As a result, it is possible to handle optical information in a region where the wavelength is equal to or less than the wavelength of light, which has been a limit in the conventional optical system.
- scattered light is applied to convert a large amount of near-field light localized on the remedial surface into re-propagated light by interaction with a minute aperture (collection mode). It plays back data stored in a minute area on the media.
- near-field light generated from the minute aperture is irradiated on the surface of the media, and interacts with minute irregularities on which information on the media surface is recorded.
- Reproduction is also possible by detecting the scattered light to be reconverted by a separately provided detector (illumination mode).
- the recording method is to irradiate near-field light generated from a minute aperture to the surface of the medium to change the shape of a minute area on the medium (heat mode recording) or to change the refractive index or transmittance of the minute area. (Photon mode recording).
- the configuration of a recording / reproducing device using near-field light is almost the same as that of a magnetic disk device, and a near-field optical head is used instead of a magnetic head.
- a slider with a small optical aperture attached to the tip of the suspension arm is levitated to a certain height by flying head technology to access any data mark on the disk.
- the near-field optical head In order to make the near-field optical head follow the high rotation of the disk, it has a flexure function to stabilize the posture in response to the undulation of the disk.
- an optical fiber optical waveguide is connected to the slider or the arm, or a laser provided above or in the horizontal direction of the slider is directly applied to the slider. Means for irradiation were taken.
- the optical fiber or optical waveguide structure When light is incident with such a structure, the optical fiber or optical waveguide structure is connected between the slider and the arm, which hinders the free movement of the slider. However, it became difficult to control the attitude of the slider with respect to the movement of the disk, and the distance between the disk and the slider could not be kept constant. As a result, the output S / N ratio from the optical information drawn on the disk was reduced, making it difficult to read and write signals. In addition, when a signal is directly emitted to the slider by the laser placed above the slider, it is necessary to synchronize the light to be incident, in order to cope with the high-speed movement of the slider. It required a separate body and was very difficult. Also, by providing such a structure separately, the device itself becomes large, and the reproduction / recording device is It was difficult to reduce the size. Disclosure of the invention
- a slider which receives a levitation force by a relative movement with a medium, and a minute structure which is formed in a surface of the slider on the medium side and generates and / or detects near-field light are provided.
- a slider-side optical waveguide mechanism formed in the slider and optically connected to the microstructure; an arm supporting the slider and applying a load load; and an arm formed in the arm and forming the slider side. Recording and reproduction of information composed of an arm-side optical waveguide that guides light to the optical waveguide, and an optical waveguide that is in contact with the arm-side optical waveguide and in contact with the slider-side optical waveguide.
- the load is applied to the slider via the optical waveguide mechanism.
- optical waveguide mechanism and the arm-side optical waveguide mechanism have a body structure.
- optical waveguide mechanism and the slider-side optical waveguide mechanism have a body structure.
- the area where the optical waveguide mechanism and the arm-side optical waveguide mechanism are in contact, or the area where the optical waveguide mechanism and the slider-side optical waveguide mechanism are in contact, or both areas are extremely small. It is characterized by being small.
- optical waveguide mechanism is in contact with the arm-side optical waveguide mechanism, the slider-side optical waveguide mechanism, or both at one point.
- the light on the arm side is reliably transmitted to the slider, and the structure that guides the light to the slider does not hinder the free movement of the slider, and the slider that scans the medium keeps the distance to the medium constant. Media movement while maintaining The posture can be freely controlled in response to the situation. As a result, stable signal output and input with a high SN ratio are possible.
- the optical waveguide mechanism or slider that propagates light is a minute structure that is manufactured by a micromachining process using silicon or the like, the suspension function of the arm is hindered, and the slider moves excessively due to overweight. There is almost no effect on the decrease in Therefore, the size of the entire device can be reduced.
- the entire optical head or almost all of the optical head can be manufactured in a mass production process using a semiconductor process, and cost reduction can be achieved.
- a part of the optical waveguide mechanism has a conical shape or a bell-shaped shape with a sharp apex, and is contacted at the apex.
- a part of the optical waveguide mechanism has a shape of a part of a spherical surface, and is in contact with a part of the spherical surface.
- a part of the optical waveguide mechanism has a light collecting function.
- the present invention by optically designing an optical waveguide, it is possible to supply a large amount of light to the slider while reliably guiding the light to the slider.
- By adjusting the ratio more light can be collected around the minute aperture formed in the slider and generating near-field light.
- signals with a high SN ratio can be input and output, and a highly reliable device can be manufactured.
- the load is applied toward the center of gravity of the slider, and the microstructure existing in the surface on the media side determines a point at which the slider receives the load and the center of gravity of the slider. It is characterized by being located on the connecting straight line.
- the minute structure is located near an edge in the surface on the medium side by the shape and density distribution of the slider and a combination thereof.
- a part of the slider on the side opposite to the media has a slider volume. Characterized in that there is a recess having a size corresponding to 15 or more of the above.
- the size of the step is equal to or more than 110 of the average thickness of the slider.
- a material having a density different from that of the slider occupies a volume of 1/10 or more of the slider.
- the attitude of the flying slider is slightly inclined with respect to the media surface due to the air pressure distribution in the media side surface received by the high-speed motion of the media, but the opening is arranged in an area close to the media in the media side surface.
- the SN ratio during signal reproduction is improved, and an information reproduction / recording device with high stability and high reliability can be manufactured.
- the improved SN ratio enables high-speed recording and reproduction without the need for a high-output light source, and enables the manufacture of a small, thin, and low-cost information reproduction and recording device.
- FIG. 1 is a schematic diagram showing an example of the optical storage / reproduction device according to Embodiment 1 of the present invention.
- FIG. 2 is a diagram showing a structure of the optical head according to Embodiment 1 of the present invention.
- FIG. 3 is a diagram showing a structure of an optical head according to Embodiment 2 of the present invention.
- FIG. 4 is a diagram showing a structure of an optical head according to Embodiment 3 of the present invention.
- FIG. 5 is a diagram showing a structure of an optical head according to Embodiment 4 of the present invention.
- FIG. 6 is a diagram showing a structure of an optical head according to Embodiment 5 of the present invention.
- FIG. 7 is a diagram showing a structure of an optical head according to Embodiment 6 of the present invention.
- FIG. 8 is a diagram showing a positional relationship between an optical head and a medium according to Embodiment 6 of the present invention.
- FIG. 9 is a diagram showing a structure of an optical head according to Embodiment 6 of the present invention.
- FIG. 10 is a diagram showing a structure of an optical head according to Embodiment 7 of the present invention.
- FIG. 11 is a diagram showing a structure of an optical head according to Embodiment 7 of the present invention.
- FIG. 1 shows a schematic diagram of an example of the optical storage / reproduction device according to Embodiment 1 of the present invention.
- a slider 2 which keeps a constant distance from the disk 1 by a levitation force received by a fluid motion generated by the rotation and a load applied by the arm 3 is arranged.
- the slider 2 is supported at the tip end of the arm 3, and the slider 2 can be scanned anywhere on the disc 1 by moving the arm 3 in the horizontal direction by the rotating shaft 4 with a motor.
- the light that has propagated through the optical waveguide 5 on the arm 3 is converted into near-field light through a small aperture formed in the disk side surface of the slider 2 via the optical waveguide in the slider 2 and illuminates the disk 1 Is done.
- the scattered light generated by the interaction between the near-field light and the minute area on the surface of the disk 1 is converted into an electric signal by a light-receiving element provided in or near the slider 2 and sent to a signal processing circuit, where The area information is reproduced.
- FIG. 2 shows the structure of the optical head according to Embodiment 1 of the present invention.
- the optical head 100 of the present structure includes a slider 6 having a small aperture 8 and a slider-side optical waveguide 7 formed thereon, a support portion 14 supporting the slider 6, and a load for applying a load to the slider 6. It comprises an arm-side optical waveguide 11 partially having a part 12 and an arm 10 on which the arm-side optical waveguide 11 is formed.
- the slider 6 is arranged near the leading end of the arm 10 and below the arm 10.
- the arm-side optical waveguide 11 is formed on the upper surface of the arm 10, but may be formed in the arm 10 or on the lower surface of the arm 10.
- the light applied to the medium is transmitted to the arm-side optical waveguide 11 formed on the arm 10. It propagates inside and is guided above the slider 6.
- a part of the arm-side optical waveguide 11 is provided with a light reflecting surface 13 for changing the propagation direction of light, and the light guided upward of the slider 6 changes the direction and changes the direction of the slider. It is guided to the slider-side optical waveguide 7 formed in 6. At this time, the light propagates through a convex load portion 12 formed by a part of the arm-side optical waveguide 11 and applying a load to the slider 6.
- the light propagating in the arm-side optical waveguide 11, reflected by the light reflection surface 13, and condensed is collected.
- the slider 6 connected to the rear arm 10 by the support portion 14 has an inverted conical hole having a small opening 8 at the top for detecting and generating near-field light, and the slider side is located inside the hole. It has a configuration in which the optical waveguide 7 is embedded. Light introduced into the slider-side optical waveguide 7 through the load portion 12 is condensed around the minute aperture 8 by the effect of the light reflection layer 9 formed around the slider-side optical waveguide 7 in the inverted conical hole. Is done.
- the condensed light is converted into near-field light through the minute aperture 8 and is applied to a minute area formed on the medium.
- the illumination mode is mainly used.
- the correction mode in which near-field light is detected can be similarly used, and the same effect is exerted.
- the slider 6 receives a levitation force from the re-media side due to the fluid motion of air due to the high-speed rotation of the media.
- a load to the slider 6 that receives the levitation force from the arm 10 having the function of suspension, the distance between the media and the minute opening 8 that interacts with near-field light can be kept constant. Accurate information reproduction and recording can be performed from the constant near-field light intensity distribution generated more.
- the load portion 12 that applies the load is formed by a part of the arm-side optical waveguide 11.
- the load section 1 2 The center of gravity of the slider 6 is held down by a sharp inverted vertex-shaped vertex and the light from the arm 10 side is adjusted so that the slider 6 can always adjust its posture to the movement of the media. It also plays the role of leading to the slider 6 side. Therefore, even if the position of the slider 6 is slightly changed to adjust the posture, the relative position of the arm-side optical waveguide 11 that holds the center of gravity of the slider and the slider-side optical waveguide 7 that is held is always constant. And always provide a stable and constant light.
- the arm and the slider having such a configuration can be manufactured by a fine processing technology represented by silicon.
- a fine processing technology represented by silicon For example, in the case of a slider, an inverted conical hole is formed in a silicon substrate serving as a base of the slider using anisotropic etching, and an optical minute opening is formed at the vertex.
- a reslider is manufactured by laminating a material having high light reflectance inside the hole and laminating an optical waveguide material for guiding light to the opening.
- a material to be an optical waveguide is formed on the metal material on which the mold of the arm is formed, and exposure and development are performed by etching or photolithography to form an arbitrary optical waveguide shape.
- the optical recording and reproducing apparatus itself can be reduced in size and weight.
- the optical head according to the present embodiment has a simple structure, but has a load portion for applying a load to the slider formed by a part of the optical waveguide, thereby coping with the movement of the medium rotating at a high speed.
- the slider's attitude can be controlled freely in response to the waviness of the disk surface, the distance between the media and the slider can be kept constant, and the relative position of the optical waveguide on the arm side and the optical waveguide on the slider side can be adjusted. — By being constant, a stable and constant light can be supplied from the minute aperture.
- the effect of the shape formed in the optical waveguide or the focusing by adjusting the refractive index Due to the effect, a sufficient amount of light can be supplied to the medium from the minute aperture, and stable recording and reproduction with a signal having a high SN ratio can be realized.
- FIG. 3 shows a structure of an optical head according to Embodiment 2 of the present invention.
- the optical head 200 of the present structure has a slider 6 in which a slider-side optical waveguide 7 having a minute opening 8 and having a part to be loaded 15 receiving a load from the arm 10 is formed.
- Embodiment 2 is the same as Embodiment 1, but is characterized in that a protrusion for receiving a load from the arm-side optical waveguide 11 is formed on the slider-side optical waveguide 7.
- the arm-side optical waveguide 11 may be formed on the arm 10, in the arm 10, and on the lower surface of the arm 10, as in FIG.
- the loaded portion 15 formed by a part of the slider-side optical waveguide 7 has a conical shape, and is in contact with the arm-side optical waveguide 11 at its apex.
- the light reflected by the light reflecting surface 13 and propagating in the direction of the slider 6 constantly and stably enters the loaded portion 15 formed by a part of the slider-side optical waveguide 7 and is guided to the minute opening 8.
- the light incident on the slider-side optical waveguide 7 can be condensed on the minute aperture 8 by adjusting the angle of incidence on the loaded portion 15 and its refractive index.
- the peak of the projection of the loaded part 15 is located above the position of the center of gravity of the slider 6, and the slider 6 can freely control the attitude of the slider 6 in response to the movement of the medium rotating at high speed. It is possible to keep the distance to 6 constant. With such a configuration, highly reliable recording / reproduction with stable signals is possible.
- FIG. 4 shows the structure of an optical head according to Embodiment 3 of the present invention.
- the optical head 300 having this structure has the same configuration as that of the first embodiment, except that the load side 16 becomes the arm side.
- a part of the shape of the optical waveguide 11 is a hemispherical shape.
- the light supplied to the minute aperture 8 can be more concentrated, and more light can be applied to the medium.
- the slider 6 since a load can be applied by contacting the slider-side optical waveguide 7 at one point of the spherical body, the slider 6 can freely respond to the movement of the medium.
- the relative distance from the media can be kept constant, and the relative position between the arm 10 and the slider 6 does not change, so that the light on the arm 10 side can be supplied at a constant level.
- the SN ratio of the optical signal is further improved, and a highly reliable device can be manufactured.
- the arm-side optical waveguide 11 may be formed on the upper surface of the arm 10, inside the arm 10, and on the lower surface of the arm 10.
- a spherical shape formed by a part of the optical waveguide may be formed on the slider-side optical waveguide 7 as shown in FIG. 3 showing the second embodiment. Also in this case, a highly reliable device can be manufactured by the same effect.
- FIG. 5 shows a structure of an optical head according to Embodiment 4 of the present invention.
- a force in which a convex portion or a part of a spherical surface is formed on either the slider-side or arm-side optical waveguide is used in the optical head 400 according to the present embodiment.
- both portions are in contact with each other, and are configured to be in contact with each other.
- FIG. 5 shows a hemispherical shape, a convex shape may of course be used. Also, one may be hemispherical and the other may be convex.
- the hemispherical lens effect is further amplified, and a large amount of light can be focused on the minute aperture 8.
- the amount of near-field light generated from the aperture can be increased, and a further improvement in the SN ratio can be expected.
- the slider 6 still has a load applied at one point, and can freely control the attitude.
- the stable light supply by the contact between the optical waveguides and the light condensing effect of the lens effect allow Signal reliability A high device configuration is realized.
- the arm-side optical waveguide 11 may be formed on the upper surface of the arm 10, inside the arm 10, and on the lower surface of the arm 10.
- FIG. 6 shows a structure of an optical head according to Embodiment 5 of the present invention.
- the apex of the inverted conical hole is formed on the silicon substrate to be the slider 6 so as to be the minute opening 8.
- a light reflection layer 9 is formed inside the hole, and a function of condensing light in the minute opening 8 is provided.
- a load is applied to the slider 6 by inserting a spherical lens 19 inside the hole and applying a load with the arm-side optical waveguide 11.
- the spherical lens 19 is in contact with the inner wall of the hole on the slider side and the optical waveguide 11 on the arm side, but can rotate freely.
- the slider 6 follows the movement of the media and The attitude can be freely changed, and the flying head technology can always maintain a constant relative position to the media.
- FIG. 7 shows a structure of an optical head according to Embodiment 6 of the present invention.
- the optical head 600 having this structure has the same configuration as the optical head 100 shown in FIG. 2 of the first embodiment.
- the force slider 6 has one surface facing the medium (the surface 22 on the medium side). It has a shape with a notched part and a convex part 20 on the side surface, and compared with the thickness of the slider 6 at the point pressed by the load part 12, the slide at the point connected by the arm 10 and the support part 14. It has a structure with a small thickness (thickness at the convex portion 20).
- the load section 12 applies a load at the position to hold down the center of gravity of the slider 6 and propagates through the arm-side optical waveguide 11 to reflect light. Light reflected on the surface 13 propagates through the load portion 12 to the minute aperture 8. For this reason, the position of the minute opening 8 is arranged at a position near the center of gravity in the surface 22 on the media side.
- the optical head 600 according to the sixth embodiment has a shape in which a part of the surface 22 on the media side of the slider 6 is missing, so that the center of gravity of the slider 6 moves, and the surface close to the media (the surface on the media side). In 22), a small opening 8 exists at the end.
- the minute opening 8 is set so that the slider 6 does not affect the airflow when floating on the medium, or the projection 20 can be made close to the opening without a part of the projection 20 coming into contact with the medium. It is necessary to set the ratio of the thickness of the protrusion 20 to the thickness of the slider 6 at 9Z 10 or less.
- FIG. 8 shows the positional relationship of the slider 6 with respect to the medium 21 when the optical head 600 according to Embodiment 6 of the present invention is scanned on the medium 21 rotated at high speed.
- a force that receives the levitation force due to the fluid motion of air is applied to the slider 6 by applying a load from the arm 10 so that the distance from the surface of the media 21 can be kept constant.
- FIG. 8 shows the attitude of the slider 6 at this time.
- the surface 22 on the media side of the slider receives a large pressure in the vertical direction of the media, and the distance from the media 21 increases. As a result, the slider 6 itself tilts, and the distance between the surface 22 of the slider 6 on the media side and the media 21 becomes the smallest near the outlet of the air flow.
- a small opening 8 By forming a small opening 8 in a region of the slider 6 on the medium side 22 where the distance from the medium 21 is small, the distance between the small opening 8 and the medium 21 becomes closer, and the S / N ratio of the signal is reduced. It is possible to reproduce information at high density.
- the size of the surface 22 on the media side is 1 mm square or less, and the opening is within a range of 0.4 mm from the edge of the surface 22 on the media side.
- FIG. 9 shows another example of the optical head 700 according to Embodiment 6 of the present invention.
- FIG. 9 shows an optical head 700 in which the position of the center of gravity of the slider 6 is deflected by cutting a part of the slider 6 largely.
- a configuration may be adopted in which a minute opening 8 is provided at an end of the surface 22 on the media side by largely shaving a part of the surface facing the media (the surface 22 on the media side),
- a large groove 23 is formed in the surface of the slider 6 on the opposite side of the media, so that the center of gravity is moved, and the position of the minute opening 8 is formed at the end of the surface 22 on the media side. It does not matter.
- the groove 23 by forming the groove 23 at a position that does not affect the airflow during high-speed rotation, a stable flying height can be secured for the media, and the optical recording with a high SN ratio and excellent reliability A device can be manufactured.
- the position of the minute opening 8 is moved from the center to the end by 1 Z 10 or more with respect to the length of one side in the surface 22 on the medium side.
- the size of the groove 23 is set to be equal to or more than 1 to 5 of the volume of the slider 6.
- FIG. 10 shows a structure of an optical head 800 according to Embodiment 7 of the present invention.
- the present optical head 800 has the same shape as the optical head 600 of the sixth embodiment shown in FIG. 7, but the convex portion 24 is made of a material different from the material forming the slider 6.
- the dissimilar material does not need to protrude, and may be formed in a part of the slider as shown in FIG. If the density of the dissimilar material 25 is higher than the density of the material constituting the slider 6, the minute opening 8 located at the center of gravity is displaced from the center of the surface 22 on the media side, and is arranged at a position closer to the media. It becomes possible.
- the different material 25 may be a material having a higher density than Si, such as copper, SUS, gold, and other metals.
- an epoxy material having a smaller density than Si is used, the position of the minute opening 8 can be shifted due to the biased center of gravity.
- the configuration of the optical head has been described by taking as an example the configuration of the optical head 100 shown in FIG. 2 in which the configuration of the optical head according to Embodiment 1 is applied. Not limited to 100, the optical head 200 described in Embodiment 2, the optical head 300 described in Embodiment 3, the optical head 400 described in Embodiment 4, and the optical head 500 described in Embodiment 5 Such a configuration may be used.
- Industrial applicability is described by taking as an example the configuration of the optical head 100 shown in FIG. 2 in which the configuration of the optical head according to Embodiment 1 is applied.
- the optical head 200 described in Embodiment 2 the optical head 300 described in Embodiment 3
- the optical head 400 described in Embodiment 4 the optical head 500 described in Embodiment 5
- Industrial applicability is an example the configuration of the optical head 100 shown in FIG. 2 in which the configuration of the optical head according to Embodiment 1 is applied.
- the optical head 200 described in Embodiment 2 the optical head 300 described in Embodi
- the slider performs a free movement corresponding to the medium rotating at a high speed, so that the distance between the medium and the slider is always kept constant, and the distance between the micro opening formed in the slider is reduced.
- a structure that stabilizes the generated myopia and the intensity of light at a constant level it is possible to realize stable recording and reproduction of information signals using light that is not affected by myopia and the intensity distribution of light.
- a highly reliable recording / reproducing method with a high SN ratio is enabled.
- most of the optical heads or components of this configuration can be manufactured by a microfabrication process using silicon, etc., which enables the miniaturization of the entire device, and at the same time reduces costs by applying it to mass production processes. Can also be realized.
- the S / N ratio of the signal is improved by arranging the opening in the area close to the media on the media side of the slider without impairing the free movement of the slider, thereby improving the product stability and reliability. It is possible to improve the performance. In addition, reading, rewriting, and writing of a finer area can be performed from a smaller opening, so that the resolution can be improved and the information density can be increased. Furthermore, even if the output of the light source is suppressed, high-speed reproduction can be performed sufficiently, which makes it possible to reduce the size, thickness and cost of the product.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60023101T DE60023101T2 (de) | 1999-08-30 | 2000-08-23 | Optischer kopf |
US09/807,771 US6567373B1 (en) | 1999-08-30 | 2000-08-23 | Optical head |
EP00954953A EP1126449B1 (en) | 1999-08-30 | 2000-08-23 | Optical head |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/242916 | 1999-08-30 | ||
JP24291699 | 1999-08-30 | ||
JP2000127325A JP4485012B2 (ja) | 1999-08-30 | 2000-04-27 | 光ヘッド |
JP2000/127325 | 2000-04-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001016949A1 true WO2001016949A1 (fr) | 2001-03-08 |
Family
ID=26535980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/005668 WO2001016949A1 (fr) | 1999-08-30 | 2000-08-23 | Tete optique |
Country Status (5)
Country | Link |
---|---|
US (1) | US6567373B1 (ja) |
EP (1) | EP1126449B1 (ja) |
JP (1) | JP4485012B2 (ja) |
DE (1) | DE60023101T2 (ja) |
WO (1) | WO2001016949A1 (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69940577D1 (de) * | 1998-11-09 | 2009-04-23 | Seiko Instr Inc | Nahfeld Abtastkopf und Herstellungsverfahren dafür |
US7069569B2 (en) * | 2000-02-01 | 2006-06-27 | Research Investment Network, Inc. | Near-field optical head system with integrated slider and laser |
JP4482254B2 (ja) * | 2001-09-27 | 2010-06-16 | セイコーインスツル株式会社 | 光ヘッド |
ATE421140T1 (de) * | 2001-10-18 | 2009-01-15 | Koninkl Philips Electronics Nv | Gleiter für eine optische datenschreib-/ lesevorrichtung und vorrichtung mit einem solchen gleiter |
JP4325172B2 (ja) * | 2002-11-01 | 2009-09-02 | 株式会社日立製作所 | 近接場光発生プローブ及び近接場光発生装置 |
WO2004088650A1 (ja) * | 2003-03-28 | 2004-10-14 | Fujitsu Limited | 光照射ヘッドおよび情報記憶装置 |
JP4482485B2 (ja) * | 2005-05-18 | 2010-06-16 | セイコーインスツル株式会社 | ヘッドモジュール |
US7272041B2 (en) * | 2005-06-30 | 2007-09-18 | Intel Corporation | Memory array with pseudo single bit memory cell and method |
JP4565452B2 (ja) * | 2006-07-27 | 2010-10-20 | セイコーインスツル株式会社 | ヘッドジンバル機構及び情報記録再生装置 |
US8169743B2 (en) * | 2007-07-20 | 2012-05-01 | Hitachi Global Storage Technologies, Netherlands B.V. | Minimizing slider vibration effects on a magnetic transducer |
JP2009093774A (ja) * | 2007-10-12 | 2009-04-30 | Fujitsu Ltd | ヘッドスライダ |
US8325566B2 (en) * | 2009-03-19 | 2012-12-04 | Tdk Corporation | Thermally-assisted magnetic recording head having a light source at least inclined from an opposed-to-medium surface |
US8194509B2 (en) * | 2009-07-30 | 2012-06-05 | Tdk Corporation | Thermally-assisted magnetic recording head comprising light source with photonic-band layer |
US8654617B2 (en) | 2012-03-21 | 2014-02-18 | Tdk Corporation | Thermally-assisted magnetic recording head with optically isolating waveguide, head gimbal assembly, head arm assembly, magnetic disk unit, and light transmission unit |
Citations (8)
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JPH0573980A (ja) * | 1991-09-12 | 1993-03-26 | Ricoh Co Ltd | 光デイスクドライブ装置の光ヘツド |
JPH05342789A (ja) * | 1992-06-10 | 1993-12-24 | Sony Corp | 浮上型磁気ヘッド装置 |
JPH0845041A (ja) * | 1994-07-29 | 1996-02-16 | Sony Corp | 浮上型磁気ヘッド |
JPH08180453A (ja) * | 1994-12-26 | 1996-07-12 | Samsung Electron Co Ltd | 高密度光記録方法及びその装置 |
JPH10188505A (ja) * | 1996-12-20 | 1998-07-21 | Nec Corp | 接触式磁気ヘッドスライダ |
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JPH11273124A (ja) * | 1998-03-17 | 1999-10-08 | Asahi Optical Co Ltd | 光ディスク装置 |
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US5351229A (en) * | 1991-12-24 | 1994-09-27 | International Business Machines Corporation | Tribo-attractive contact slider for an optical read/write system |
WO1997039447A1 (en) * | 1996-04-15 | 1997-10-23 | Digital Papyrus Technologies | A flying head positioner with fine positioning |
WO1998045841A1 (en) * | 1997-04-08 | 1998-10-15 | Seagate Technology, Inc. | Improved suspension design for a head gimbal assembly |
JP3895471B2 (ja) * | 1998-07-17 | 2007-03-22 | 富士通株式会社 | レンズアクチュエータ |
DE69940577D1 (de) * | 1998-11-09 | 2009-04-23 | Seiko Instr Inc | Nahfeld Abtastkopf und Herstellungsverfahren dafür |
JP3400374B2 (ja) * | 1999-01-27 | 2003-04-28 | 日本電信電話株式会社 | 光ピックアップ |
JP2001028139A (ja) * | 1999-07-14 | 2001-01-30 | Tdk Corp | 光プローブおよびその製造方法ならびに光ヘッド |
JP4421742B2 (ja) * | 1999-07-26 | 2010-02-24 | セイコーインスツル株式会社 | 光ヘッド |
-
2000
- 2000-04-27 JP JP2000127325A patent/JP4485012B2/ja not_active Expired - Fee Related
- 2000-08-23 DE DE60023101T patent/DE60023101T2/de not_active Expired - Lifetime
- 2000-08-23 EP EP00954953A patent/EP1126449B1/en not_active Expired - Lifetime
- 2000-08-23 WO PCT/JP2000/005668 patent/WO2001016949A1/ja active IP Right Grant
- 2000-08-23 US US09/807,771 patent/US6567373B1/en not_active Expired - Lifetime
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JPH0573980A (ja) * | 1991-09-12 | 1993-03-26 | Ricoh Co Ltd | 光デイスクドライブ装置の光ヘツド |
JPH05342789A (ja) * | 1992-06-10 | 1993-12-24 | Sony Corp | 浮上型磁気ヘッド装置 |
JPH0845041A (ja) * | 1994-07-29 | 1996-02-16 | Sony Corp | 浮上型磁気ヘッド |
JPH08180453A (ja) * | 1994-12-26 | 1996-07-12 | Samsung Electron Co Ltd | 高密度光記録方法及びその装置 |
US5850375A (en) * | 1996-07-30 | 1998-12-15 | Seagate Technology, Inc. | System and method using optical fibers in a data storage and retrieval system |
JPH10188505A (ja) * | 1996-12-20 | 1998-07-21 | Nec Corp | 接触式磁気ヘッドスライダ |
JPH11273124A (ja) * | 1998-03-17 | 1999-10-08 | Asahi Optical Co Ltd | 光ディスク装置 |
JPH11273137A (ja) * | 1998-03-24 | 1999-10-08 | Seiko Instruments Inc | 近視野光ヘッド |
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Also Published As
Publication number | Publication date |
---|---|
EP1126449A4 (en) | 2005-02-02 |
JP2001143316A (ja) | 2001-05-25 |
DE60023101T2 (de) | 2006-05-11 |
EP1126449A1 (en) | 2001-08-22 |
US6567373B1 (en) | 2003-05-20 |
EP1126449B1 (en) | 2005-10-12 |
DE60023101D1 (de) | 2006-02-23 |
JP4485012B2 (ja) | 2010-06-16 |
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