CN101236759A - Ultra-high visualization degree optic recording medium - Google Patents
Ultra-high visualization degree optic recording medium Download PDFInfo
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- CN101236759A CN101236759A CNA2007100369976A CN200710036997A CN101236759A CN 101236759 A CN101236759 A CN 101236759A CN A2007100369976 A CNA2007100369976 A CN A2007100369976A CN 200710036997 A CN200710036997 A CN 200710036997A CN 101236759 A CN101236759 A CN 101236759A
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Abstract
The invention relates to an ultrahigh imaging degree optical reading medium, in particular to an ultrahigh imaging degree optical recording medium for storage and reading by illuminating a marker generated under the optical diffractive limit on a substrate with multilayer overlaid; the invention is characterized by comprising two following parts: a recording layer formed by tellurium (Te), oxygen (O) and a third metal and a playing layer which is formed by any substance of a nonlinear optical substance, a thermochromic substance and a phase transition substance and can carry out ultrahigh imaging when light radiates on the recording layer. The ultrahigh imaging degree optical reading medium has the following advantages: as the invention can not generate a large bubble marker and can generate an even marker shape, the invention has high signal playing quality and can store the recorded content in the recording layer for a long time.
Description
Technical field
The present invention relates to a kind of ultra-high visualization degree optic recording medium, relate in particular to below the diffraction of light boundary and generate mark, and the ultra-high visualization degree optic recording medium that utilizes this mark of rayed to store and read.
Background technology
The typical example of now having developed or produced the optical recording media of product comprises DVD (the digital versatile disc that utilizes the red laser record and read; To call DVD in the following text) and use BD (the Blu-ray disc of blue laser; To call BD in the following text).The memory capacity DVD level of above-mentioned optical recording media is 4.7 lucky gal byte (Giga byte; Hereinafter referred to as GB), the BD level that puts goods on the market recently is about 25GB.According to conjecture, after 2005, the size of a CD of optical recording media can reach more than the 100GB.After 2010, the size of a CD can reach terabyte (Tera byte; TB) more than.But,,, just need to store the above capacity of 20GB, the information storage medium that is used for canned data of the data rate that 25Mbps is above for store high-density digital video (High Density Digital Video) as the information of signal flow.
Now, under various multimedia environments, the multifunctional information memory technology presents multiple development form.Wherein, optical recording media not only can be put into playing device or therefrom take out, and can store high capacity information.Simultaneously, when reading, can carry out at random (random access) to the content of storage and read, can keep the reliability of stored data, because expense is cheap, so in multiple information storage means, be concerned by people most.
Optical recording media must reduce the size of recording pit (pit), can increase recording density.Record must reduce the size of incident laser light beam in order to reduce the size of concave point, and (λ) is in direct ratio for the size of laser beam and Wavelength of Laser, and to thing lens openings number (Numerical Aperture; NA) inversely proportional (d ∝ λ/NA, wherein, d is the size of laser beam, λ is a wavelength, NA is the opening number of lens).Therefore, in order to reduce the size of laser beam, just must reduce the wavelength of laser beam or increase opening number.In order to obtain the high density medium, just should use the short laser of wavelength to store and play.But, use short wavelength laser (blue laser (405nm)) and many opening numbers (NA=0.85) to realize that the high density storage has almost arrived desirable boundary, in order to obtain bigger memory capacity, must need new technology.Therefore, as exchanging with existing C D and DVD playback equipment, and a scheme of the optical recording media that is used for store high-density information that the memory capacity of the 650MB that volume ratio initial stage CD is had is high hundreds of times is to use ultra-high imaging degree (super-resolution) phenomenon that optical recording media is carried out new research.
This ultra-high visualization degree optic recording medium is expected to use existing laser light pick-up system, simultaneously, greatly reduces the size of record mark, thereby increases storage density.(Write onceread many, WORM) ultra-high visualization degree optic recording medium forms the record mark of bubble (bubble) shape to existing once record property on recording layer.The record mark of above-mentioned bubble shape is that the metallics of nanometer size (for example, Pt) separates the nano particle that generates with the combination of oxygen element or nitrogen element etc. under certain high temperature.Simultaneously, utilize non-linearity optics rerum natura or hot activity nature material, below diffraction limit, form very little hole (aperture), generate the little mark that reads.
Below, with reference to Fig. 1 the structure of existing ultra-high visualization degree optic recording medium is described.
Fig. 1 is existing optical recording media constitute and cross-sectional configuration figure.Existing ultra-high visualization degree optic recording medium is made of following each several part: substrate 10, reflection horizon 20, dielectric layer 30a, 30b, 30c), photic zone 40, recording layer 50 and broadcast layer 60.Laser beam incides optical recording media by photic zone 40, and is reflected away after arriving reflection horizon 20.
Existing recorded is PtOx (oxide of Pt) with recording layer 50 materials useds of ultra-high visualization degree optic recording medium.But, if comprise on the existing optical recording media of above-mentioned constitute and shone laser beam, just can form very big air bubble-shaped mark.Simultaneously, the shape of above-mentioned air bubble-shaped mark is inhomogeneous, and signal quality (jitter) is also bad.
Summary of the invention
The objective of the invention is to be to provide a kind of ultra-high visualization degree optic recording medium that generates uniform mark shape than atmosphere blister mark and have the higher signal play quality that can not generate.
Another object of the present invention provides and a kind ofly can have a kind of material on ultra-high visualization degree optic recording medium and can make the long-time ultra-high visualization degree optic recording medium of preserving of content of record.
For achieving the above object, ultra-high visualization degree optic recording medium of the present invention, be characterized in: multilayer superposes on the substrate, below the diffraction of light boundary, generate mark, and the ultra-high visualization degree optic recording medium that utilizes this mark of rayed to store and read, it comprises following two parts: the recording layer that is formed by tellurium (Te), oxygen (O) and the 3rd metal; Form by any one material in non-linear optical material, hot chrome yellow (thermochromic) material and the phase change material, when illumination is mapped on the recording layer, just can carry out the broadcast layer of ultra-high imaging.
According to above-mentioned conception of the present invention, be preferably, the 3rd metallic element of above-mentioned recording layer is from silver (Ag), gold (Au), tungsten (W), manganese (Mn), platinum (Pt), titanium (Ti), zirconium (Zr), boron (B), chromium (Cr), iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), antimony (Sb), tantalum (Ta), aluminium (Al), indium (ln), copper (Cu), tin (Sn), zinc (Zn) is selected more than one in the bismuth elements such as (Bi).If added the 3rd metallic element in tellurium on the above-mentioned recording layer (Te) and the oxygen (O),, can obtain good recording characteristic because the record mark of air pocket state can not occur.
According to above-mentioned conception of the present invention, be preferably, it is more than 25%, below 60% that the O atom that comprises in the above-mentioned recording layer contains proportional.
According to above-mentioned conception of the present invention, be preferably, the 3rd metallic element atom that adds among Te and the O in the above-mentioned recording layer is more than 1%, below 35%.
According to above-mentioned conception of the present invention, be preferably, the thickness of above-mentioned recording layer is more than the 1nm, below the 30nm.
According to above-mentioned conception of the present invention, be preferably, above-mentioned broadcast layer selects more than one elements to form by from germanium (Ge) in the antimony (Sb), tellurium (Te).
According to above-mentioned conception of the present invention, be preferably, above-mentioned broadcast layer is to be benchmark with the recording layer, is superimposed upon the position of substrate or in the far position of substrate on the position, any place.
According to above-mentioned conception of the present invention, be preferably, broadcast layer thickness is more than the 3nm, below the 200nm.
According to above-mentioned conception of the present invention, be preferably, dielectric layer superposes on above-mentioned recording layer two surface of contact.
According to above-mentioned conception of the present invention, be preferably, above-mentioned optical recording media is a storage-type (WORM) optical recording media.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is existing optical recording media constitute and cross-sectional configuration figure;
Fig. 2 is constitute and the cross-sectional configuration figure of optical recording media one embodiment of the present invention;
Fig. 3 is constitute and the cross-sectional configuration figure of another embodiment of optical recording media of the present invention;
Fig. 4 is constitute and the cross-sectional configuration figure of the another embodiment of optical recording media of the present invention.
Embodiment
Below, with reference to Fig. 2 one embodiment of ultra-high visualization degree optic recording medium of the present invention is described.One embodiment of ultra-high visualization degree optic recording medium of the present invention is the circle of the about 120mm of external diameter, the about 1.2mm of thickness, the reflection horizon 20 that superposeed successively on substrate 10, dielectric layer 30a, recording layer 50, dielectric layer 30b, broadcast layer 60, dielectric layer 30c and photic zone 40.The wavelength of the laser beam that uses in the ultra-high visualization degree optic recording medium is between the 380-450nm, preferably use the laser beam (laserbeam) of about 405nm, from the photic zone surface, promptly shine recording layer and carry out data (data) and store and read from light entrance face.If read or store data on optical recording media, using opening number is 0.7 above lens, preferably use opening number be about 0.85 to the thing lens, thus, about the big or small about 0.4 μ m of the laser beam point on the recording layer.
In order to guarantee the thickness of optical recording media, the substrate 10 general disks that use thick about 0.6-1.1mm.Substrate 10 faces are the mind-set periphery therefrom, perhaps forms spiral concave point (groove) and salient point (land) according to its reverse direction, is used for guided laser.The constitute of substrate 10 can use multiple applying materials such as glass, pottery or resin, simultaneously, uses the injection moulding performance, and birefringence when laser is injected (birefringence) is little, signal to noise ratio (S/N ratio) (Carrier-to Noise Ratio; CNR) polycarbonate (Polycarbonate) of characteristic such as big.Make substrate and use the injection molded method better, still, also can use other methods such as photosensitive polymerization method.
In the optical recording media of the present invention, recording layer 50 can comprise tellurium (Te) and oxygen (O).If with the main composition of TeOx (oxide of Te), even recording layer 50 does not carry out initialization procedure, after film forming, if make laser intensity change the irradiation amorphous state, just can form the mark (mark) of crystal habit as recording layer.Because said process is irreversible, so it is the emphasis characteristic of a recordable type recording medium can't revising or eliminate.Above-mentioned recording film has moisture-proof, so when environment changes, still can keep higher record confidence level.If use above-mentioned recorded matter, just can utilize monofilm to carry out record, so consider comparatively desirable from producing cost (cost) angle.But, if use TeOx in the recording layer, before laser radiation recording layer 50 makes the recording film sufficient crystallising, need some time a little, so as the recording medium that requires high-speed responsive, just some is improper.Therefore, in order to overcome above shortcoming, just must in TeOx, add element (M).Element (M) from silver (Ag), the gold (Au), tungsten (W), manganese (Mn), platinum (Pt), titanium (Ti), zirconium (Zr), boron (B), chromium (Cr), iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), antimony (Sb), tantalum (Ta), aluminium (Al), indium (ln), copper (Cu), tin (Sn) selects an above element better in the zinc (Zn), bismuth (Bi).The above-mentioned element that is added (M) promotes the Te crystallization, can generate the crystal grain of Te-M at a high speed.Therefore, the material energy high speed crystallization that comprises in the recording layer 50, the line item of going forward side by side, and can access high-speed responsive.Advance together, the element that adds among Te that comprises in the above-mentioned recording layer 50 and the O is a metallics, can not form the record mark than air pocket, and above-mentioned record mark can be preserved for a long time.
In order fully to obtain above-mentioned effect, it is more than 25% that the O atom that comprises in the above-mentioned recording layer contains proportional, better below 60%.The 3rd metallic element atom that adds among Te and the O in the above-mentioned recording layer is more than 1%, and is better below 35%.
In order to form above-mentioned reflection horizon 20, dielectric layer 30a, 30b, 30c, recording layer 50 and broadcast layer 60 can use optical spectroscopy, also can use the vacuum lamination method.
Below, with reference to Fig. 3, another embodiment of ultra-high visualization degree optic recording medium of the present invention is described.Fig. 3 seems similar to Fig. 2, also is the cross section structure figure of ultra-high visualization degree optic recording medium, and still, its recording layer 50 and broadcast layer 60 have changed the position.
As mentioned above, observe from the direction that substrate 10 is injected to laser beam, recording layer 50 is compared with broadcast layer 60, and recording layer 50 can be nearer from substrate 10 than broadcast layer 60, also can be that broadcast layer 60 is nearer from substrate 10 than recording layer 50.
Fig. 4 is constitute and the cross-sectional configuration figure of the another embodiment of optical recording media of the present invention.In Fig. 4,50 to one broadcast layer 60a are nearer from photic zone 40 for recording layer, and 60b is nearer from substrate 10 than another broadcast layer.Simultaneously, can superpose respectively dielectric layer 30a, 30b, 30c, 30d of each recording layer 50 and broadcast layer 60a, 60b two sides.
Below, will the effect of ultra-high visualization degree optic recording medium of the present invention be described:
The first, what ultra-high visualization degree optic recording medium of the present invention generated is uniform mark shape, and can not generate than atmosphere blister mark, and has the higher signal play quality;
The second, ultra-high visualization degree optic recording medium of the present invention can make the content of record be kept on the recording layer for a long time.
Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, under the situation that does not break away from spirit of the present invention, also can make the variation or the replacement of various equivalences, therefore, as long as in connotation scope of the present invention in the scope to the variation of the foregoing description, claims that modification all will drop on the application.
Claims (11)
1. ultra-high visualization degree optic recording medium is characterized in that: the multilayer that superposes on the substrate, below the diffraction of light boundary, generate mark, and the ultra-high visualization degree optic recording medium that utilizes this mark of rayed to store and read, it comprises following two parts:
The recording layer that forms by tellurium, oxygen and the 3rd metal;
Form by any one material in non-linear optical material, hot chrome yellow material and the phase change material, when illumination is mapped on the recording layer, just can carry out the broadcast layer of ultra-high imaging.
2. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that: the 3rd metallic element of described recording layer is to select more than one from elements such as silver, gold, tungsten, manganese, platinum, titanium, zirconium, boron, chromium, iron, cobalt, nickel, palladium, antimony, tantalum, aluminium, indium, copper, tin, zinc, bismuth.
3. ultra-high visualization degree optic recording medium as claimed in claim 2 is characterized in that: the 3rd metallic element atom that adds in tellurium and the oxygen in the above-mentioned recording layer is more than 1%, below 35%.
4. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that: it is more than 25%, below 60% that the oxygen atom that comprises in the above-mentioned recording layer contains proportional.
5. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that: described broadcast layer is formed by more than one elements of selecting from germanium, antimony, tellurium.
6. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that: the thickness of described recording layer is more than the 1nm, below the 30nm.
7. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that: described broadcast layer is a benchmark with the recording layer, is superimposed upon the position of described substrate or in the far position of substrate on the position, any place.
8. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that: described broadcast layer thickness is more than the 3nm, below the 200nm.
9. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that, also comprises: above-mentioned ultra-high visualization degree optic recording medium and substrate contacts, the reflection horizon that the laser beam that is injected into ultra-high visualization degree optic recording medium is reflected.
10. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that: dielectric layer superposes on described recording layer two surface of contact.
11. ultra-high visualization degree optic recording medium as claimed in claim 1 is characterized in that: above-mentioned optical recording media is a storage-type optical recording media.
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CNA2007100369976A CN101236759A (en) | 2007-01-31 | 2007-01-31 | Ultra-high visualization degree optic recording medium |
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CNA2007100369976A CN101236759A (en) | 2007-01-31 | 2007-01-31 | Ultra-high visualization degree optic recording medium |
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