CN1306510C - High-density hot-write magnetic read recording medium and its system - Google Patents
High-density hot-write magnetic read recording medium and its system Download PDFInfo
- Publication number
- CN1306510C CN1306510C CNB2003101230021A CN200310123002A CN1306510C CN 1306510 C CN1306510 C CN 1306510C CN B2003101230021 A CNB2003101230021 A CN B2003101230021A CN 200310123002 A CN200310123002 A CN 200310123002A CN 1306510 C CN1306510 C CN 1306510C
- Authority
- CN
- China
- Prior art keywords
- recording layer
- recording
- magnetic
- write
- density
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 58
- 230000003287 optical effect Effects 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 230000005415 magnetization Effects 0.000 claims abstract description 7
- 238000007654 immersion Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229910004205 SiNX Inorganic materials 0.000 claims 1
- 229910052681 coesite Inorganic materials 0.000 claims 1
- 229910052906 cristobalite Inorganic materials 0.000 claims 1
- 229910052950 sphalerite Inorganic materials 0.000 claims 1
- 229910052682 stishovite Inorganic materials 0.000 claims 1
- 229910052905 tridymite Inorganic materials 0.000 claims 1
- 229910052984 zinc sulfide Inorganic materials 0.000 claims 1
- 239000000725 suspension Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000010409 thin film Substances 0.000 description 5
- 239000005083 Zinc sulfide Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000005374 Kerr effect Effects 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 230000005298 paramagnetic effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Images
Abstract
The invention relates to a high-density thermal-write magnetic read recording medium and a system thereof, which writes data by near-field optical laser and reads data by a magnetic resistance head, wherein the recording medium comprises: a substrate; a recording layer formed on one side of the substrate; and a plurality of micro cylindrical lenses formed between the substrate and the recording layer, so that when data is written in the recording layer by the near-field optical laser, the size of the light spot can be reduced by generating the near-field optical effect, the recording density of the recording layer can be improved, and the magnetization direction of the data recording layer of the recording layer can be read by the magneto-resistive head to be vertical to the surface of the recording layer; the recording layer is a magneto-optical recording layer, and the magneto-optical recording layer further has a readout layer thereon. And combining the near-field optical writing and the sensitive reading technology of the magnetic resistance head to form a high-density thermal writing magnetic reading system, so as to break through the limit of optical diffraction and improve the density of the recording medium.
Description
Technical field
The present invention relates to a kind of recording medium, be applied in the magnetooptic recording system, relate in particular to that a kind of combined with near field optics writes and the reading technology of magnetoresistive head sensitivity and the highdensity heat of tool is write magnetic read record medium and system thereof.
Background technology
In the middle of the field of recording medium, the recording density that how to promote recording medium is most important problem for a long time always.Recording medium can be divided into optical recording media and magnetic recording medium according to the difference that stores principle, and wherein optical recording media is subject to the restriction that optics diffraction limit magnetic recording medium then is subject to the super paramagnetic limit, makes that its recording density can't continue to improve.
In recent years, technology such as near field optic and optics super resolution have been applied to discs, to break through the diffraction limit of optical disc recording medium.With near field optic, (solidimmersion lens SIL) obtains the luminous point littler than the diffraction limit, and obtains littler recorded bit to improve the recording density of discs can to utilize a solid immersion lens.But the sliding flying distance between the object lens of its optical head and the disc must can produce near-field effect less than the laser light wavelength, so will increase the difficulty of CD-ROM system design.As No. the 6614742nd, United States Patent (USP), be with solid immersion lens (solid immersion lens, SIL) as near-field recording, but the SIL optical head must design complicated suspension system, and optical head and disc must be kept about 100nm distance, practical application degree of difficulty height.
In addition, people such as Guerra proposes a kind of integration near field optic (Integral Near-field Optical; INFO) technology, be solid immersion lens (solid immersion lens with time little cylindrical shape, SIL) directly be made on the substrate of traditional DVD discs, significantly dwindle the recording density of spot definition and then raising discs, and do not need the distance between optical read head and discs is shortened to below the Wavelength of Laser, so can solve in the near-field optical systems, optical read head and discs are too near to and the problem of collision friction during the discs rotation, and the recording density of DVD discs also can rise to 9.4GB by 4.7GB.(J.Guerra，D.Vezenov，P.Sullivan，W.Haimberger，and?L.Thulin，“Near-field?optical?recordingwithout?low-flying：integral?near-field?optical?media”，Jpn.J.Appl.Phys.Vol.41，pp.1866-1875，2002)。Yet, when this technology is applied to traditional magneto-optical disc, though recorded bit can significantly be dwindled, but when reading, magnetooptic recording is that the catoptrical kerr rotational angle of detecting (Kerr angle) is when coming reading signal, because of Kerr effect can weaken along with dwindling of area of detecting, when feasible magnetic domain when disc record is very little, when just recording density was very high, reflected light is just very weak, and cause can't reading signal, quite inconvenient in the application.
On the other hand on magnetic recording medium, in order to improve the recording density of magnetic recording medium, people such as Hideki proposed a kind of new heat in 1998 and write magnetic read record mode, this is can form the advantage of knowing vertical sector in conjunction with magneto-optical disc, and the high sensitivity large reluctance magnetic head of hard disk (giant magneto-resistive head, GMR head) advantage that reads technology is reached (H.Saga, H.Nemoto, H.Sukeda, and M.Takahashi, " New recording method combining thermo-magnetic writing and fluxdection ", Jpn.J.Appl.Phys.Vol.38, pp.1839-1840,1999).Its recording sheet is traditional magneto-optic memory technique, utilize the pyromagnetic wiring method record signal of traditional magneto-optic, then measure the magnetic flux reading signal when reading with large reluctance magnetic head, but traditional magneto-optic recording material, and be not suitable for heat and write the recording medium that magnetic is read, be that mainly saturated magnetization amount (Ms) value under its room temperature is too little, can't provide enough magnetic flux to supply the large reluctance magnetic head reading signal.
Summary of the invention
Technical matters to be solved by this invention is to provide the highdensity heat of a kind of tool to write magnetic read record medium and system thereof, not only alleviated read head suspension system (Slider) weight and simplified its design, and can significantly improve the recording density of disc.
To achieve these goals, the invention provides the highdensity heat of a kind of tool and write magnetic read record medium, its characteristics are, write data by near field optic laser and see through magnetoresistive head and read data, and described recording medium includes:
One substrate;
One recording layer is formed at a side of described substrate; And
A plurality of microcylindrical lens, be formed between described substrate and the described recording layer, make and to write data when the described recording layer by described near field optic laser, the size that can produce near field optical effects and dwindle its luminous point, improve the recording density of described recording layer, and can read the data of described recording layer by described magnetoresistive head;
Wherein, the surface of the vertical described recording layer of direction of magnetization of described recording layer; Described recording layer is a magnetooptic recording layer, also has a readout layer on the described magnetooptic recording layer.
The highdensity heat of above-mentioned tool is write magnetic read record medium, and its characteristics are that described substrate is a glass substrate.
The highdensity heat of above-mentioned tool is write magnetic read record medium, and its characteristics are that the effective numerical aperture of described microcylindrical lens is greater than 1.1.
The highdensity heat of above-mentioned tool is write magnetic read record medium, and its characteristics are that described microcylindrical lens is a solid immersion lens.
The highdensity heat of above-mentioned tool is write magnetic read record medium, and its characteristics are that the material of described microcylindrical lens is selected from by ZnS, SiO
2And SiN
XIn the combination that is constituted one.
The highdensity heat of above-mentioned tool is write magnetic read record medium, and its characteristics are that described recording layer is a magnetic recording thin film.
The highdensity heat of above-mentioned tool is write magnetic read record medium, and its characteristics are also have a readout layer on the described magnetic recording thin film.
The present invention also provides the highdensity heat of a kind of tool to write the magnetic read apparatus, and its characteristics are, include:
One recording medium comprises recording layer and a plurality of microcylindrical lens that is formed between described substrate and the described recording layer that a substrate, is formed at described substrate;
Wherein, the surface of the vertical described recording layer of direction of magnetization of described recording layer; Described recording layer is a magnetooptic recording layer, also has a readout layer on the described magnetooptic recording layer;
One near field optic laser is located at described recording medium one side, can write data for described recording layer, and produces near field optical effects and the size of dwindling its luminous point, improves the recording density of described recording layer; And
One magnetoresistive head is installed in the opposite side of described recording medium, in order to read the data of described recording layer.
The highdensity heat of above-mentioned tool is write the magnetic read apparatus, and its characteristics are that described substrate is a glass substrate.
The highdensity heat of above-mentioned tool is write the magnetic read apparatus, and its characteristics are that the effective numerical aperture of described microcylindrical lens is greater than 1.1.
The highdensity heat of above-mentioned tool is write the magnetic read apparatus, and its characteristics are that described microcylindrical lens is a solid immersion lens.
The highdensity heat of above-mentioned tool is write the magnetic read apparatus, and its characteristics are that the material of described microcylindrical lens is selected from by ZnS, SiO
2And SiN
XIn the combination that is constituted one.
The highdensity heat of above-mentioned tool is write the magnetic read apparatus, and its characteristics are that described recording layer is a magnetic recording thin film.
The highdensity heat of above-mentioned tool is write the magnetic read apparatus, and its characteristics are also have a readout layer on the described magnetic recording thin film.
The highdensity heat of above-mentioned tool is write the magnetic read apparatus, and its characteristics are that described magnetoresistive head is selected from large reluctance magnetic head or tunnel shape magnetoresistive head.
The highdensity heat of disclosed tool is write magnetic read record medium and system thereof according to the present invention, combined with near field optics (Integral Near-field Optical; INFO) write and the technology that reads that magnetoresistive head (Magneto-resistancehead) is sensitive, break through the limit of optics diffraction, improve the density of recording medium.Its system includes near field optic laser, magnetoresistive head and recording medium, and has little columned solid immersion lens on the recording medium, make that the near field optic laser-light write is fashionable, produce optical effect and its luminous point is dwindled, and on recording medium, obtain less record position and improve recording density, therefore, near field optic laser does not need can reach the effect that near field optic writes near recording medium, when avoiding the recording medium rotation, laser and recording medium are too near to and the problem of collision friction; And cooperate magnetoresistive head to read data, not only alleviated suspension system weight, and simplify the design of aircraft.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the structural representation of the first embodiment of the present invention;
Fig. 2 is the structural representation of the second embodiment of the present invention.
Embodiment
The highdensity heat of the disclosed tool of the present invention is write magnetic read record medium and system thereof, see also Fig. 1, include near field optic laser 30, recording medium 10 and magnetoresistive head 20, wherein, the recording layer 11 that recording medium 10 includes substrate 12 and is covered on substrate 12 1 sides, and also be formed with little cylinder lenses 13 between substrate 12 and the recording layer 11.And substrate 12 can be a glass substrate, and forms little columniform solid immersion lens (solid immersion lens thereon; SIL) be covered with whole recording layer 11 belows, the laser light 311 that makes the laser head 31 of near field optic laser 30 be launched can produce near field optical effects, and the spot definition that forms on recording layer 11 is dwindled, and then obtain less recorded bit to improve recording density, solve in the general near-field optical systems, optical head and recording medium too close and with the interface problem of recording medium surface friction.Its material can be ZnS (zinc sulphide), SiO
2(silicon dioxide) or SiN
X(silicon nitride), and require effective numerical aperture (effective numerical aperture) greater than 1.1.
On the other hand,, do not need the special aircraft of additional designs (slider) 21 promptly to can read, alleviate the weight of suspension system (not shown) by the data that magnetoresistive head 20 comes reading and recording layer 11.Magnetoresistive head 20 can be large reluctance magnetic head (giant magneto-resistive head; GMR head) or tunnel shape magnetoresistive head (Tunneling Magneto-resistance head; TMR head), be good still with tunnel shape magnetoresistive head.Recording layer 11 is magnetic recording thin film or magneto-optic recording material, at room temperature magnetic requires to need having high saturation amount (Ms) and high vertical face coercive force (Hc) at normal temperature, and vertical face coercive force (Hc) value can descend rapidly and is beneficial to pyromagnetic writing during the temperature rising.
When writing data, utilize laser head 31 to send laser 311 process focus lamps 32, pass substrate 12, be subjected to microcylindrical lens 13 and produce near field optical effects, make that recording layer 11 is magnetized, its direction of magnetization is good (as the direction of arrow that is illustrated among the figure) with vertical surface, so, can improve the density of record.And when reading, read by recording layer 11 1 sides by magnetoresistive head 20, can alleviate the weight of suspension system again and simplify the design of aircraft 21.
In addition, the second embodiment of the present invention, as shown in Figure 2, mainly be to consider that recording layer 11 exposes, therefore wearing and tearing or demagnetization easily also form readout layer 14 in the outside, the data of its main duplicated record layer 11 reads for magnetoresistive head 20, all the other working methods, principle are all identical, and the design that can improve recording density and alleviate suspension system does not repeat them here equally.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (15)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101230021A CN1306510C (en) | 2003-12-23 | 2003-12-23 | High-density hot-write magnetic read recording medium and its system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101230021A CN1306510C (en) | 2003-12-23 | 2003-12-23 | High-density hot-write magnetic read recording medium and its system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632872A CN1632872A (en) | 2005-06-29 |
| CN1306510C true CN1306510C (en) | 2007-03-21 |
Family
ID=34844710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101230021A Expired - Fee Related CN1306510C (en) | 2003-12-23 | 2003-12-23 | High-density hot-write magnetic read recording medium and its system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1306510C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5910940A (en) * | 1996-10-08 | 1999-06-08 | Polaroid Corporation | Storage medium having a layer of micro-optical lenses each lens generating an evanescent field |
| US20010040841A1 (en) * | 1999-12-15 | 2001-11-15 | Shieh Han-Ping David | Recording method and medium for optical near-field writing and magnetic flux reading |
| CN1377035A (en) * | 2001-03-22 | 2002-10-30 | 财团法人工业技术研究院 | Near-field optical disk |
| US6628574B1 (en) * | 1998-01-12 | 2003-09-30 | Hitachi Maxell, Ltd. | Reproducing method and reproducing apparatus using plural light beam powers for transferring a magnetic domain |
-
2003
- 2003-12-23 CN CNB2003101230021A patent/CN1306510C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5910940A (en) * | 1996-10-08 | 1999-06-08 | Polaroid Corporation | Storage medium having a layer of micro-optical lenses each lens generating an evanescent field |
| US6628574B1 (en) * | 1998-01-12 | 2003-09-30 | Hitachi Maxell, Ltd. | Reproducing method and reproducing apparatus using plural light beam powers for transferring a magnetic domain |
| US20010040841A1 (en) * | 1999-12-15 | 2001-11-15 | Shieh Han-Ping David | Recording method and medium for optical near-field writing and magnetic flux reading |
| CN1377035A (en) * | 2001-03-22 | 2002-10-30 | 财团法人工业技术研究院 | Near-field optical disk |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1632872A (en) | 2005-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Saga et al. | New recording method combining thermo-magnetic writing and flux detection | |
| KR100431017B1 (en) | Recording/reproducing head and recording/reproducing apparatus incorporating the same | |
| US6636390B2 (en) | Magnetic head and magnetic recording and reproducing system | |
| US7099097B2 (en) | Thermally assisted magnetic recording method | |
| CN1381042A (en) | Method of thermally-assisted data recording and recording apparatus | |
| JP2003067901A5 (en) | ||
| Sukeda et al. | Thermally assisted magnetic recording on flux-detectable RE-TM media | |
| US20060209469A1 (en) | Magnetoresistance effect reproduction head | |
| CN1306510C (en) | High-density hot-write magnetic read recording medium and its system | |
| JPH08273222A (en) | Magneto-optical recording medium and reproducing method thereof | |
| TWI277069B (en) | High-density thermo-magnetic recording medium and system thereof | |
| JP2006059474A (en) | Magnetic recording method, magnetic recording medium, and magnetic recording apparatus | |
| JP3441417B2 (en) | Magnetic recording head and magnetic recording device using the same | |
| KR100702090B1 (en) | Magnetic recording device | |
| JP3823696B2 (en) | Magnetic recording / reproducing device | |
| US20010040841A1 (en) | Recording method and medium for optical near-field writing and magnetic flux reading | |
| TW498321B (en) | A recording method for optical super-resolution writing and magnetic flux detection | |
| WO2010103982A1 (en) | Information storage medium and information storage device | |
| JP2000021041A (en) | Floating type magnetic head device, signal reproducing method and recording and reproducing method using the head | |
| KR100447159B1 (en) | magneto-optical recording medium | |
| Saga et al. | A New Perpendicular Magnetic Recording Method with a Magnetic-Optical Common Preformat | |
| JP2001229501A (en) | Information reproducing device and information reproducing method | |
| Kamimura et al. | Thermally Assisted Magnetic Recording Using an Optical Head with NA= 0.85 | |
| JP2000293802A (en) | Magnetic recording method, magnetic recording head and magnetic recording device | |
| JP2001195702A (en) | Information recording method, information record reproducing method and information recording medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070321 Termination date: 20151223 |
|
| EXPY | Termination of patent right or utility model |