CN1224014C - Two-sided high-density information storage medium - Google Patents
Two-sided high-density information storage medium Download PDFInfo
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- CN1224014C CN1224014C CNB02145759XA CN02145759A CN1224014C CN 1224014 C CN1224014 C CN 1224014C CN B02145759X A CNB02145759X A CN B02145759XA CN 02145759 A CN02145759 A CN 02145759A CN 1224014 C CN1224014 C CN 1224014C
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- information storage
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- storage media
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 9
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000004417 polycarbonate Substances 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229920000515 polycarbonate Polymers 0.000 claims description 6
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- 239000003822 epoxy resin Substances 0.000 description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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Abstract
The present invention relates to a double-sided high-density information storage medium which applies blue light and a laser reading-writing head of which the short wave length is lower than that of the blue light to perform reading and storing operation to add the unit area of the information storage medium and information storage capacity; in addition, the double-sided recording laminated structure of the two-sided high-density information storage medium is used for improving the recording capacity of the present invention; a double-sided tow-recording-layer high-density information storage medium and a double-sided four-recording-layer high-density information storage medium are formed.
Description
Technical field
The invention relates to a kind of double-sided high density information storage media, particularly the double-sided high density information storage media of reading and writing about a kind of short wavelength's of being applied to laser read head.
Background technology
Along with information and multimedia arriving from generation to generation, comprise that 3C (Computer, Communication, the Consumer Electronics) product of computing machine, communication, consumer electronics also constantly increases for the storage density of storage medium and the demand of capacity.At present with regard to the optical information storage medium, with nineteen eighty-two Holland Philips (Philips) company and the CD specification made of the Red Book of new power (Sony) company of Japan co-present (Compact Disk CD) generally popularly accepts and is extensive use of.
Because multimedia application augmentation and digitizing arriving from generation to generation day by day, it is more and more higher to the requirement of image and audio to add the user, and therefore, the high storage density of data storage media and the demand of high power capacity be increase thereupon also.Especially in the performance of digital audio-video, the discs of CD specification has not been applied and has been used.(Video Compact Disk, VCD), its image quality can not show a candle to general video-tape, and a slice videodisc only can store 1 hour image and sound program with present the most general videodisc.Therefore, Dutch Philips (Philips) company and Sony (Sony) company reach an agreement, and have proposed digital versatile disc (Digital Versatile Disc, DVD) specification jointly in April, 1996 with other manufacturer.With the capacity of store digital data, DVD discs monolithic capacity is about 4.7GB (Gigabyte) and is about 650MB (Megabyte) far above the monolithic capacity of CD discs, significantly promotes on capacity.So since nineteen ninety-six, can cooperate and read and the hardware of DVD playing back disc also enters the consumption market and becomes one of main product gradually.Also develop simultaneously and many relevant DVD specifications.
Yet broadcast pattern and pursue higher audio-visual ornamental quality in order to integrate present image signal, (High-Definition Television, HDTV) play-back technology has become the state-of-the-art at present pattern of broadcasting to high definition television.Therefore having produced brand-new audiovisual standard, promptly is the HDTV signal of high image quality and high tone quality.HDTV is that a kind of new video signal shows specification, and it can be supported 1,920 * 1,080 resolution, use the renewal frequency (renewal frequency of television system is 24 or 30 at present) of 16: 9 display screen of length breadth ratio and per second 30 or 60 pictures.Simultaneously also cause the discs storage volume to become bottleneck once again, the DVD discs of capacity 4.7GB is if be used for storing the high image quality film of HDTV signal, and it only can store less than 40 minutes, therefore, enter high image quality epoch of HDTV in future, the use of DVD discs will be restricted greatly.
With regard to the optical information storage medium, general with the ruddiness laser as the optical information storage medium that reads light source, owing to the problem that involves the optics diffraction limit, recording density is restricted relatively.Because the focal spot of optical read head size is relevant with wavelength, when the wavelength of laser light source was read in shortening, focal spot will dwindle relatively, and the recording capacity of unit area then promotes several times relatively.The present specification of the high power capacity light-memory medium that proposed of each big light-memory medium manufacturing company, as high-density digital multifunctional optical disc (High-Density Digital Versati1e Disc, HD-DVD), one after another with the royal purple light of shorter wavelength as optical pickup.Hence one can see that, stipulates out the CD specification of cooperation short wavelength laser and the development main flow that structure is present light-memory medium.
Summary of the invention
The object of the present invention is to provide a kind of double-sided high density information storage media to store data capacity to improve it.The laser read/write head that this medium utilizes blue light and is lower than the short wavelength of blue light reads and stores; To increase the amount of data storage of information storage media unit area.And the disc structure of two-sided four recording layers of arranging in pairs or groups promotes its capacity.
Purpose of the present invention can realize by following measure:
A kind of double-sided high density information storage media, this double-sided high density information storage media are that application blue light and the laser read/write head that is lower than the short wavelength of blue light are stored and read, and it includes:
One substrate, the top of this substrate have and at least onely duplicate the ditch track surface and the bottom has at least one ditch track surface that duplicates; And
The ditch track surface that duplicates on this top is coated with a recording stack, and this recording stack is made up of at least one information recording layer;
The ditch track surface that duplicates in this bottom is coated with a recording stack, and this recording stack is made up of at least one information recording layer;
Wherein, this recording stack surface has a surface coating.
The material of this substrate be selected from polycarbonate, polymethylmethacrylate, macromolecule resin, glass and aluminum metal one of them.
The thickness of this substrate is 0.85 millimeter to 1.3 millimeters.
The thickness optimum value of this substrate is 0.95 millimeter to 1.1 millimeters.
This substrate has the base material applying of duplicating the ditch track surface by two single faces and forms.
The thickness of this base material is 0.4 millimeter to 0.65 millimeter.
The thickness optimum value of this base material is 0.45 millimeter to 0.55 millimeter.
When arbitrary of substrate duplicate ditch track surface number greater than 2 the time, each duplicates the recording stack that covers on the ditch track surface and another and duplicates and be provided with a separation layer between the ditch track surface.
The material of this information recording layer be selected from phase-transition material, magneto-optic memory technique and organic material one of them.
Described double-sided high density information storage media also is included in the combination in any that adds optics strengthening layer, calorifics strengthening layer and magnetic characteristic strengthening layer in this recording stack.
A kind of double-sided high density information storage media, this double-sided high density information storage media are that application blue light and the laser read/write head that is lower than the short wavelength of blue light are stored and read, and it includes:
One substrate, this substrate top have one first top and duplicate ditch track surface and bottom thereof and have one first bottom and duplicate the ditch track surface;
One first top recording stack, it is covered in this first top and duplicates the ditch track surface, and this first top recording stack is made up of at least one information recording layer;
One first separation layer, surface thereof is superimposed in this recording stack surface, first top, and another surface is that the ditch track surface is duplicated on one second top;
One second top recording stack, it is covered in this second top and duplicates the ditch track surface, and this second top recording stack is made up of at least one information recording layer;
One first bottom recording stack, it is covered in this first bottom and duplicates the ditch track surface, and this first bottom recording stack is made up of at least one information recording layer;
One second separation layer, surface thereof are superimposed in this recording stack surface, first bottom, and another surface is that the ditch track surface is duplicated in one second bottom; And
One second bottom recording stack, it is covered in this second bottom and duplicates the ditch track surface, and this second bottom recording stack is made up of at least one information recording layer;
Wherein, this second top recording stack and this recording stack surface, second bottom respectively have a surface coating.
The material of this substrate be selected from polycarbonate, polymethylmethacrylate, macromolecule resin, glass and aluminum metal one of them.
The thickness of this substrate is 0.85 millimeter to 1.3 millimeters.
The thickness optimum value of this substrate is 0.95 millimeter to 1.1 millimeters.
This substrate has the base material applying of duplicating the ditch track surface by two single faces and forms.
The thickness of this base material is 0.4 millimeter to 0.65 millimeter.
The thickness optimum value of this base material is 0.45 millimeter to 0.55 millimeter.
The thickness of this first separation layer and this second separation layer is 0.1 micron to 100 microns.
The thickness optimum value of this first separation layer and this second separation layer is 10 microns to 40 microns.
The material of this information recording layer be selected from phase-transition material, magneto-optic memory technique and organic material one of them.
Described double-sided high density information storage media also is included in the combination in any that adds optics strengthening layer, calorifics strengthening layer and magnetic characteristic strengthening layer in this recording stack.
The present invention has following advantage compared to existing technology:
The present invention can use existing discs processing procedure, produces the information storage media structure that cooperates short wavelength's laser read/write head.Double-sided high density information storage media of the present invention cooperates short wavelength's laser read/write head can reach highdensity read-write, can produce simultaneously have four layers of recording stack information storage media to reach high information storage capacity.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the invention;
Fig. 2 is the structural representation of second embodiment of the invention;
Fig. 3 is the structural representation of third embodiment of the invention;
Fig. 4 is the structural representation of fourth embodiment of the invention;
Fig. 5 is the structural representation of first recording stack of second embodiment of the invention.
Concrete embodiment
Please refer to Fig. 1, it is the structural representation of first embodiment of the invention.Get the two-sided substrate 100 that duplicates the ditch track surface that respectively has.The ditch track surface that duplicates on substrate 100 tops has first recording stack 110, and the ditch track surface that duplicates in substrate 100 bottom surfaces has second recording stack 120; And, to be protected by overlayer 130 respectively again at its first recording stack 110 and second recording stack, 120 surfaces, the thickness of overlayer 130 is about 70 microns to 125 microns, promptly forms the high density information storage medium of two-sided two recording layers.Wherein, first recording stack 110 and second recording stack 120 are made up of more than one information recording layer.
The present invention also comprises the high density information storage medium of two-sided four recording layers with higher memory capacity, please refer to Fig. 2, and it is the structural representation of second embodiment of the invention.Get the two-sided substrate 200 that duplicates the ditch track surface that respectively has.The ditch track surface that duplicates on substrate top has first recording stack 210, form first separation layer 220 in first recording stack, 210 surfaces again, make on first separation layer 220 with template and to duplicate the ditch track surface, and form second recording stacks 230 in first separation layer, 220 surfaces.The ditch track surface that duplicates in substrate bottom surface has the 3rd recording stack 240, form second separation layer 250 in its 3rd recording stack 240 surfaces equally, on second separation layer 250, make and duplicate the ditch track surface, and form the 4th recording stack 260 in second separation layer, 250 surfaces.And; on second recording stack 230 of the top of substrate and bottom surface and the 4th recording stack 260 surfaces more respectively coating one overlayer 270 protected; tectal thickness is about 70 microns to 125 microns, promptly forms the high density information storage medium of two-sided four recording layers.Wherein, each recording stack is made up of more than one information recording layer.And first embodiment and the employed substrate thickness of second embodiment are about 0.85 millimeter to 1.3 millimeters, and the thickness optimum value of substrate is 0.95 millimeter to 1.1 millimeters
Double-sided high density information storage media of the present invention also can be fitted by the double-basis plate and be formed, and please refer to Fig. 3, and it is the structural representation of third embodiment of the invention.Get single face and have the substrate 300 that duplicates the ditch track surface, its substrate 300 thickness are about 0.45 millimeter to 0.6 millimeter; Duplicate the ditch track surface at it and respectively have a recording stack 310, this recording stack 310 is made up of more than one information recording layer; Protected by an overlayer 320 on its recording stack 310 surfaces, the thickness of overlayer 320 is about 70 microns to 125 microns; Then, get two above-mentioned substrates, with two plate bases 300 to duplicate the ditch track surface outside, another surface then utilizes laminating layer 330 to fit relatively, then can form the high density information storage medium of two-sided two recording layers.
Same, also can form the high density information storage medium of two-sided four recording layers according to this, as shown in Figure 4, it is the structural representation of fourth embodiment of the invention.Get single face and have the substrate 400 that duplicates the ditch track surface, and duplicate the ditch track surface at it and have a recording stack 410; Storehouse one separation layer 420 on this recording stack 410, make on separation layer 420 with template earlier and duplicate the ditch track surface, form another recording stack 430 in separation layer 420 surfaces again, formed by more than one information recording layer respectively by the recording stack 430 that separation layer 420 is separated; With two plate bases 400 to duplicate the ditch track surface outside, another surface then utilizes laminating layer 450 to fit relatively face-to-face; At last, protected by an overlayer 440 again on the recording stack surface of substrate top and bottom surface; Can form the high density information storage medium of two-sided four recording layers.
In addition, single or double used in the present invention has the substrate that duplicates the ditch track surface, the optional self-polycarbonate of its material (Polycarbonate, PC), polymethylmethacrylate (Polymethylmethacrylate, PMMA), macromolecule resin, glass or aluminum metal select one and make.Its separation layer of isolating recording stack is made by epoxy resin (Epoxy), polymethylmethacrylate or polyester (Polyester).Simultaneously, also can directly use quite ripe at present ejection forming technique to be made.Its separation layer of isolating recording stack then can be made by epoxy resin, polymethylmethacrylate or polyester, and utilize method such as template duplicating to make and duplicate the ditch track surface.
And each recording stack of the present invention is made up of the information recording layer more than one deck, can use multiple different materials and make information recording layer, as phase-transition material, magneto-optic memory technique or organic material, reaches the purpose of multilayer record.And, can in recording stack, add the strengthening layer of optics, calorifics or magnetic characteristic, as dielectric layer, metal level and magnetic auxiliary layer etc.The material of its metal level is selected from the alloy of gold, silver, aluminium, chromium, platinum, nickel, silicon and combination in any thereof.As shown in Figure 5, it is the structural representation of first recording stack of second embodiment of the invention.Laser light ray is through after first separation layer 220, enter first recording stack 210 on substrate 200 surfaces, be in regular turn thickness be 10 nanometers (nanometer) to dielectric layer 214, the thickness of 150 nanometers be the phase-transition material recording layer 213 of 3 nanometer to 30 nanometers and the dielectric layer 212 that thickness is 10 nanometer to 150 nanometers, entering thickness at last is the metal level 211 of 30 nanometer to 200 nanometers.
Claims (20)
1, a kind of double-sided high density information storage media, this double-sided high density information storage media are that application blue light and the laser read/write head that is lower than the short wavelength of blue light are stored and read, and it includes:
One substrate, the top of this substrate have and at least onely duplicate the ditch track surface and the bottom has at least one ditch track surface that duplicates; And
The ditch track surface that duplicates on this top is coated with a recording stack, and this recording stack is made up of at least one information recording layer;
The ditch track surface that duplicates in this bottom is coated with a recording stack, and this recording stack is made up of at least one information recording layer;
Wherein, the surface of described recording stack has a surface coating.
2, double-sided high density information storage media as claimed in claim 1, the material that it is characterized in that this substrate be selected from polycarbonate, polymethylmethacrylate, macromolecule resin, glass and aluminum metal one of them.
3, double-sided high density information storage media as claimed in claim 1, the thickness that it is characterized in that this substrate are 0.85 millimeter to 1.3 millimeters.
4, double-sided high density information storage media as claimed in claim 1, the thickness that it is characterized in that this substrate are 0.95 millimeter to 1.1 millimeters.
5, double-sided high density information storage media as claimed in claim 1 is characterized in that this substrate has the base material applying of duplicating the ditch track surface by two single faces and forms.
6, double-sided high density information storage media as claimed in claim 5, the thickness that it is characterized in that this base material are 0.4 millimeter to 0.65 millimeter.
7, double-sided high density information storage media as claimed in claim 5, the thickness that it is characterized in that this base material are 0.45 millimeter to 0.55 millimeter.
8, double-sided high density information storage media as claimed in claim 1, the material that it is characterized in that this information recording layer be selected from phase-transition material, magneto-optic memory technique and organic material one of them.
9, double-sided high density information storage media as claimed in claim 1 is characterized in that also being included in the combination in any that adds optics strengthening layer, calorifics strengthening layer and magnetic characteristic strengthening layer in this recording stack.
10, a kind of double-sided high density information storage media, this double-sided high density information storage media are that application blue light and the laser read/write head that is lower than the short wavelength of blue light are stored and read, and it includes:
One substrate, this substrate top have one first top and duplicate ditch track surface and bottom thereof and have one first bottom and duplicate the ditch track surface;
One first top recording stack, it is covered in this first top and duplicates the ditch track surface, and this first top recording stack is made up of at least one information recording layer;
One first separation layer, surface thereof is superimposed in this recording stack surface, first top, and another surface is that the ditch track surface is duplicated on one second top;
One second top recording stack, it is covered in this second top and duplicates the ditch track surface, and this second top recording stack is made up of at least one information recording layer;
One first bottom recording stack, it is covered in this first bottom and duplicates the ditch track surface, and this first bottom recording stack is made up of at least one information recording layer;
One second separation layer, surface thereof are superimposed in this recording stack surface, first bottom, and another surface is that the ditch track surface is duplicated in one second bottom; And
One second bottom recording stack, it is covered in this second bottom and duplicates the ditch track surface, and this second bottom recording stack is made up of at least one information recording layer;
Wherein, this second top recording stack and this recording stack surface, second bottom respectively have a surface coating.
11, double-sided high density information storage media as claimed in claim 10, the material that it is characterized in that this substrate be selected from polycarbonate, polymethylmethacrylate, macromolecule resin, glass and aluminum metal one of them.
12, double-sided high density information storage media as claimed in claim 10, the thickness that it is characterized in that this substrate are 0.85 millimeter to 1.3 millimeters.
13, double-sided high density information storage media as claimed in claim 10, the thickness that it is characterized in that this substrate are 0.95 millimeter to 1.1 millimeters.
14, double-sided high density information storage media as claimed in claim 10 is characterized in that this substrate has the base material applying of duplicating the ditch track surface by two single faces and forms.
15, double-sided high density information storage media as claimed in claim 14, the thickness that it is characterized in that this base material are 0.4 millimeter to 0.65 millimeter.
16, double-sided high density information storage media as claimed in claim 14, the thickness that it is characterized in that this base material are 0.45 millimeter to 0.55 millimeter.
17, double-sided high density information storage media as claimed in claim 10, the thickness that it is characterized in that this first separation layer and this second separation layer are 0.1 micron to 100 microns.
18, double-sided high density information storage media as claimed in claim 10, the thickness that it is characterized in that this first separation layer and this second separation layer are 10 microns to 40 microns.
19, double-sided high density information storage media as claimed in claim 10, the material that it is characterized in that this information recording layer be selected from phase-transition material, magneto-optic memory technique and organic material one of them.
20, double-sided high density information storage media as claimed in claim 10 is characterized in that also being included in the combination in any that adds optics strengthening layer, calorifics strengthening layer and magnetic characteristic strengthening layer in this recording stack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02145759XA CN1224014C (en) | 2002-10-11 | 2002-10-11 | Two-sided high-density information storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02145759XA CN1224014C (en) | 2002-10-11 | 2002-10-11 | Two-sided high-density information storage medium |
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| Publication Number | Publication Date |
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| CN1489142A CN1489142A (en) | 2004-04-14 |
| CN1224014C true CN1224014C (en) | 2005-10-19 |
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| CNB02145759XA Expired - Fee Related CN1224014C (en) | 2002-10-11 | 2002-10-11 | Two-sided high-density information storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047192B (en) * | 2006-03-31 | 2013-03-13 | 株式会社半导体能源研究所 | Nonvolatile semiconductor memory device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996480B (en) * | 2006-12-29 | 2010-11-24 | 清华大学 | Conversion method and device of multilevel variable data and blue light multilevel optical storage device |
| CN1996479B (en) * | 2006-12-29 | 2010-11-24 | 清华大学 | Conversion method and device for multilevel variable data and blue light multilevel optical storage device |
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2002
- 2002-10-11 CN CNB02145759XA patent/CN1224014C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101047192B (en) * | 2006-03-31 | 2013-03-13 | 株式会社半导体能源研究所 | Nonvolatile semiconductor memory device |
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| CN1489142A (en) | 2004-04-14 |
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