CN101794598A - Single-sided double-layer optical disk and manufacturing method thereof - Google Patents
Single-sided double-layer optical disk and manufacturing method thereof Download PDFInfo
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- CN101794598A CN101794598A CN 201010103716 CN201010103716A CN101794598A CN 101794598 A CN101794598 A CN 101794598A CN 201010103716 CN201010103716 CN 201010103716 CN 201010103716 A CN201010103716 A CN 201010103716A CN 101794598 A CN101794598 A CN 101794598A
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- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
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- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24035—Recording layers
- G11B7/24038—Multiple laminated recording layers
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Abstract
The invention discloses a single-sided double-layer optical disk which comprises a blank substrate, a first recording layer, a semi-reflecting layer, a buffer layer, a second recording layer, a total reflecting layer, a papery cover plate and a protecting film, wherein the first recording layer, the semi-reflecting layer, the buffer layer, the second recording layer and the total reflecting layer are sequentially formed on the blank substrate; and the papery cover plate is provided with a printing surface and an adhesive surface which are opposite, and the protecting film is formed on the adhesive surface of the papery cover plate and bonded with the total reflecting layer formed on the blank substrate. Because the blank substrate is not provided with pre-fabricated information, the single-sided double-layer optical disk can be manufactured through a non-injection molding process and is suitable for mass production, thereby greatly saving the cost, simultaneously reducing the link of reheating, high temperature laminating and injection molding of a PC (Polycarbonate) material by utilizing an injection molding machine, reducing the industry chain energy consumption and the birefringence index of a PC substrate and improving the product quality. A packaging cover plate of the single-sided double-layer optical disk adopts the innovative papery cover plate, thereby not only the usage quantity of the PC material is saved, and the carbon emission is reduced, but also environmental pollution is not caused when in recovery, and the single-sided double-layer optical disk also can be recycled and has the characteristic of environmental pollution. Meanwhile, the invention also discloses a manufacturing method of the single-sided double-layer optical disk.
Description
Technical field
The present invention relates to a kind of CD, relate in particular to a kind of single-side double-layer light disk and manufacture method thereof.
Background technology
The DVD CD is digital versatile disc (Digital Versatile Disc), claim Video CD (Digital Video Disc) again, because it has the storage density height, volume is little, the storage period limit for length, with low cost, advantages such as compatible height and error rate are low, become the main flow of present optical information recording medium, technically, the DVD CD is intended to cover home entertaining with a kind of single digital format, computer and information commercial affairs, it has been substituted laser disc, and obtained from all electronic enterprises and computer hardware enterprise, the support of film and music studio, become the most successful storage medium on the CD storage technique history, it makes information flow more convenient, therefore plays more and more important effect in social life.
The DVD CD mainly contains single-surface single-layer CD (DVD-5), single-side double-layer light disk (DVD-9), two-sided single-layer optical disc (DVD-10) and two-sided double-layer CD various ways CDs such as (DVD-18); With single-side double-layer light disk (DVD-9) is example, and its structure comprises that two processing have the substrate L of information record groove
0With substrate L
1, and with substrate L
0With substrate L
1Bonding to form complete DVD-9 CD, in the concrete production run, need two injection machines to be connected on the DVD compact disc production line PC (full name: polycarbonate; English, Polycarbonate) material granule is pressed into the compact disc substrate that thickness is 0.6mm through two injection machines heating injection mouldings respectively, and when injection moulding by stamper respectively on two substrates prefabricated information record groove to form L
0Substrate and L
1Substrate, L
0Substrate and L
1Substrate is transferred to the sputter unit after cooling, at L
0Sputter semi-reflective layer on the information faces of substrate, the semi-reflective layer material is generally silicon, at L
1Sputter total reflection layer on the information faces of substrate, the total reflection layer material is generally argent, aluminium, gold and alloy thereof; L after sputter is finished
0Substrate and L
1Substrate is bonding by the counter-rotating of UV curing glue, solidifies through the UV light irradiation again, promptly finishes its production procedure through detection at last.
Yet there is following shortcoming in existing DVD-9 optical disc production method: at first, need two injection machines with granular PC material process heating injection moulding pressing, be shaped to the L that has information record groove
0Substrate and L
1Substrate because injection moulding process itself is high temperature high energy consumption process, therefore makes most of energy resource consumption in the whole DVD-9 optical disc production process in this link; Secondly, the PC material source is from petroleum industry, draws material to form to be injection molded into being of substrate also to need the energy of consume significant during granular PC material at it, and carbon emission is very high, and two substrates are the PC material in the structure of existing DVD-9 CD, and the PC material usage is bigger, is unfavorable for environmental protection and energy-conservation; Once more, the PC material for preparing in the optical disc production process when the injection moulding process because through the secondary heating fusing, the birefraction that makes the substrate of producing influences the DVD CD quality with respect to wanting high in the birefraction of PC material factory straight forming substrate.
To sum up, because the structure of existing DVD-9 CD has two substrates, therefore its manufacturing process energy consumption height not only, and PC material consumption is big, cause the discharge capacity of carbon bigger, be unfavorable for environmental requirement, and the substrate birefraction height of making that utilizes granular PC material secondary to heat and melt, the DVD-9 CD quality influenced.
Therefore, be badly in need of a kind of PC of saving material, energy consumption is low and environmental protection, and can improve the single-side double-layer light disk of CD quality.
Summary of the invention
One of purpose of the present invention provides a kind of PC of saving material, energy consumption is low and environmental protection, and can improve the single-side double-layer light disk of CD quality.
Another object of the present invention provides a kind of PC of saving material, energy consumption is low and environmental protection, and can improve the manufacture method of the single-side double-layer light disk single-side double-layer light disk of CD quality.
For achieving the above object, technical scheme of the present invention is: a kind of single-side double-layer light disk is provided, comprise: blank substrate, first recording layer, semi-reflective layer, cushion, second recording layer, total reflection layer, papery cover plate and diaphragm, described first recording layer are formed on the surface of described blank substrate; Described semi-reflective layer is formed on described first recording layer; Described cushion is formed on the described semi-reflective layer; Described second recording layer is formed on the described cushion; Described total reflection layer is formed on described second recording layer; Described papery cover plate has relative printing surface and adhesive surface, described diaphragm be formed on the adhesive surface of described papery cover plate and with blank substrate on the total reflection layer that forms bonding.
Preferably, be printed with the CD content label on the printing surface of described papery cover plate, the encapsulation cover plate of papery can be earlier be printed on the information labels of CD content on the printing surface of papery cover plate, make the discs loaded down with trivial details technology of later stage print content label again in the classical production process earlier and need not to adopt, reduce the investment of CD manufacturing enterprise, save cost.
Preferably, described diaphragm is monox or silicon nitride material, and described diaphragm is protected papery cover plate and total reflection layer in adhesion process.
Equally preferably, the thickness of described cushion is between 43 microns to 55 microns.Press mold technology was to the infringement of substrate when described cushion can effectively prevent recording layer formation, and the anti-stop signal in protection reflection horizon is destroyed.The thickness of described first recording layer, second recording layer is all between 2 microns to 4 microns.
Correspondingly, the present invention also provides a kind of manufacture method of single-side double-layer light disk, may further comprise the steps: (1) provides the substrate of a blank; (2) spin coating forms first glue layer on a surface of described blank substrate; (3) press mold information tunnel forms first recording layer on described first glue layer; (4) sputter forms semi-reflective layer on described first recording layer; (5) spin coating forms cushion on described half emission layer; (6) spin coating forms second glue layer on described cushion; (7) press mold information tunnel forms second recording layer on described second glue layer; (8) sputter forms total reflection layer on described second recording layer; (9) provide a papery cover plate, described papery cover plate has relative printing surface and adhesive surface; (10) on the adhesive surface of described papery cover plate, form diaphragm; (11) will be formed with the described papery cover plate of diaphragm and be formed with the bonding formation single-side double-layer light disk of totally reflected blank substrate by glue.
Wherein, in the described step (11), described glue is spun on the described total reflection layer.
Preferably, described step (3), (5), (7) also further comprise curing schedule afterwards, pass through curing process, first recording layer, the spin coating that makes press mold be formed with the information tunnel is formed on second recording layer that cushion, press mold on the semi-reflective layer be formed with the information tunnel and becomes firm, makes reliable in quality.
Preferably, be printed with the CD content label on the printing surface of described papery cover plate, the encapsulation cover plate of papery can be earlier be printed on the information labels of CD content on the printing surface of papery cover plate, make the disc loaded down with trivial details technology of later stage print content label again in the classical production process earlier and need not to adopt, reduce the investment of CD manufacturing enterprise, save cost.
Preferably, described diaphragm is monox or silicon nitride material, and described diaphragm is protected papery cover plate and total reflection layer in adhesion process.
Equally preferably, the thickness of described cushion is between 43 microns to 55 microns.Press mold technology was to the infringement of substrate when described cushion can effectively prevent recording layer formation, and the anti-stop signal in protection reflection horizon is destroyed.The thickness of described first recording layer, second recording layer is all between 2 microns to 4 microns.
Compared with prior art, because single-side double-layer light disk of the present invention comprises blank substrate, first recording layer, semi-reflective layer, cushion, second recording layer, total reflection layer, papery cover plate and diaphragm, described first recording layer is formed on the surface of described blank substrate; Described semi-reflective layer is formed on described first recording layer; Described cushion is formed on the described semi-reflective layer; Described second recording layer is formed on the described cushion; Described total reflection layer is formed on described second recording layer; Described papery cover plate has relative printing surface and adhesive surface, described diaphragm be formed on the adhesive surface of described papery cover plate and with blank substrate on the total reflection layer that forms bonding.No prefabricated information on the described blank substrate, can make by non-injection molding process, be applicable to production in enormous quantities, save cost greatly, removed from simultaneously and utilized injection machine that the PC material is heated the process procedure of high temperature pressing injection mo(u)lding once more, reduced the industrial chain energy consumption on the one hand, reduced the birefraction of PC substrate on the other hand, improved the quality of products.And its encapsulation cover plate adopts the cover plate of innovative papery, has replaced the PC cover plate in the existing DVD9 structure, has not only saved the consumption of PC material, reduces the carbon discharge capacity, and can not cause the pollution of environment when reclaiming and also can be reused, and has the environmental protection characteristics.Correspondingly, the manufacture method of single-side double-layer light disk provided by the invention is saved the PC material equally, energy consumption is low and environmental protection, and can improve CD quality.
Description of drawings
Fig. 1 is the structural representation of single-side double-layer light disk of the present invention.
Fig. 2 is the cut-open view of Fig. 1 along the A-A line.
Fig. 3 is the process flow diagram of the manufacture method of single-side double-layer light disk of the present invention.
Embodiment
In order to describe technology contents of the present invention, structural attitude in detail, be described further below in conjunction with embodiment and conjunction with figs., label identical among the wherein different figure is represented identical parts.
As shown in Figure 1 and Figure 2, single-side double-layer light disk 100 of the present invention, comprise that blank substrate 1, first recording layer 2, semi-reflective layer 3, cushion 4, second recording layer 5, total reflection layer 6, papery cover plate 9 and diaphragm 8, the first recording layers 2 are formed on the surface of described blank substrate 1; Semi-reflective layer 3 is formed on described first recording layer 2; Cushion 4 is formed on the described semi-reflective layer 3; Second recording layer 5 is formed on the described cushion 4; Total reflection layer 6 is formed on described second recording layer 5; Described papery cover plate 9 has relative printing surface and adhesive surface; Diaphragm 8 be formed on the adhesive surface of described papery cover plate 9 and with blank substrate 1 on the total reflection layer 6 that forms bonding; Be printed with the CD content label on the printing surface of described papery cover plate 9.
Particularly, blank substrate 1 improves preparation by PC material supplier on the market on its existing processing procedure, blank substrate 1 thickness is 0.6mm, median pore diameter 15mm, external diameter 120mm, and no prefabricated information on the blank substrate 1, the thickness evenness of this blank substrate 1 and angularity require to require quite with the substrate 1 that utilizes PC material particle through the injection machine injection mo(u)lding; First recording layer 2 for thickness all the special resin between 2 microns to 4 microns go up by a surface that is spun on blank substrate 1 and form; The thickness of cushion 4 is between 43 microns to 55 microns, and press mold technology was to the infringement of substrate 1 when described cushion 4 can effectively prevent recording layer formation, and the anti-stop signal in protection reflection horizon is destroyed; Second recording layer 5 for thickness all the special resin between 2 microns to 4 microns form by being spun on the cushion 4; The dimensional requirement of papery cover plate 9 requires the same with blank substrate 1; can obtain by modern ripe paper industry; it makes raw material both can be once that former wood pulp also can be to reclaim paper pulp; the diaphragm 8 of papery cover plate 9 is monox or silicon nitride material; diaphragm 8 is protected papery cover plate 9 and total reflection layer 6 in adhesion process; be printed with the CD content label on the printing surface of papery cover plate 9; the encapsulation cover plate of papery can be earlier be printed on the information labels of CD content on the printing surface of papery cover plate 9; make the discs loaded down with trivial details technology of later stage print content label again in the classical production process earlier and need not to adopt; reduce the investment of CD manufacturing enterprise, save cost.
As shown in Figure 3, the manufacture method of single-side double-layer light disk 100 of the present invention may further comprise the steps:
(101) provide the substrate of a blank;
(102) spin coating forms first glue layer on a surface of described blank substrate;
(103) press mold information tunnel forms first recording layer on described first glue layer;
(104) sputter forms semi-reflective layer on described first recording layer;
(105) spin coating forms cushion on described half emission layer;
(106) spin coating forms second glue layer on described cushion;
(107) press mold information tunnel forms second recording layer on described second glue layer;
(108) sputter forms total reflection layer on described second recording layer;
(109) provide a papery cover plate, described papery cover plate has relative printing surface and adhesive surface;
(110) on the adhesive surface of described papery cover plate, form diaphragm;
(111) will be formed with the described papery cover plate of diaphragm and be formed with the bonding formation single-side double-layer light disk of totally reflected blank substrate by glue.
In conjunction with Fig. 2, Fig. 3, manufacture method to the bright single-side double-layer light disk 100 of the present invention is described in detail, the substrate 1 of one blank at first is provided, there is not prefabricated information on the substrate 1, the special resin of 2 microns～4 microns of spin coating one decks forms first recording layer 2 on blank substrate 1 then, enters the normal temperature press mold chamber of the prefabricated first information then, and this chamber is divided into first chamber and second chamber, the stamper of the prefabricated first information is equipped with in first chamber, and the stamper minute surface can be up and down by the drive unit driving; Second cavity bottom is quartzy material, and transparent cushion and substrate 1 stationary installation are arranged above the quartzy material; Below the quartzy material UV cure lamp is housed; Upper and lower chamber can be closed and be connected with vacuum system.Spin coating there is the blank substrate 1 of the special resin stationary installation of packing into, upper and lower chamber closure, the vacuum system running is extracted into the certain vacuum degree with chamber, the stamper pressing, on first recording layer 2, suppress first information tunnel, the UV lamp is opened first recording layer 2 is carried out primary solidification then, the state of cure that can look after the primary solidification link in the press mold process continues to solidify to first recording layer 2, this continuation curing process belongs to optional technology, because the press mold process is to finish under vacuum state, can well avoid bubble to produce, thereby guarantee the press mold quality; Solidify finish after, the substrate 1 that is shaped on the first information in advance is placed into the sputter unit, sputter forms semi-reflective layer 3 on first recording layer 2, semi-reflective layer 3 materials can adopt with existing DVD-9 product in identical materials; Then the material of spin coating one deck 43 microns～55 micron thickness forms cushion 4 on half emission layer, and this cushion 4 is carried out UV curing; After curing is finished, spin coating thickness is that 2 microns～4 microns special resin forms second recording layer 5 on cushion 4, enter the normal temperature press mold chamber of prefabricated second information then, suppress the second information tunnel on second recording layer 5, the UV lamp is opened second recording layer 5 is cured then; After curing is finished, the substrate 1 that is shaped on second information in advance is placed into the sputter unit, sputter forms total reflection layer 6 on second recording layer 5, total reflection layer 6 materials can adopt with existing DVD-9 product in identical materials, the substrate 1 that will form total reflection layer 6 is then sent into adhesive stations, waits for and carries out bonding with papery cover plate 9; When blank substrate 1 is processed; one papery cover plate 9 is provided; papery cover plate 9 has relative adhesive surface and printing surface; on the adhesive surface of papery cover plate 9, prepare layer protecting film 8 earlier; this film material can be silicon nitride; monox etc.; in the product use, bonding rete and reflective coating are played a protective role; the papery cover plate 9 for preparing diaphragm 8 is sent into adhesive stations; spin coating glue forms bonding coat 7 on the total reflection layer 6 that forms on the blank substrate 1 again; and will be formed with the papery cover plate 9 and the blank substrate 1 bonding formation single-side double-layer light disk that is formed with total reflection layer 6 of diaphragm 8 by bonding coat 7; carry out whirl coating after bonding; solidify, and finish the preparation process of whole single-side double-layer light disk after the online quality inspection.
Because single-side double-layer light disk 100 of the present invention comprises that blank substrate 1, first recording layer 2, semi-reflective layer 3, cushion 4, second recording layer 5, total reflection layer 6, papery cover plate 9 and diaphragm 8, the first recording layers 2 are formed on the surface of blank substrate 1; Semi-reflective layer 3 is formed on first recording layer 2; Cushion 4 is formed on the semi-reflective layer 3; Second recording layer 5 is formed on the cushion 4; Total reflection layer 6 is formed on second recording layer 5; Papery cover plate 9 has relative printing surface and adhesive surface, diaphragm 8 be formed on the adhesive surface of papery cover plate 9 and with blank substrate 1 on the total reflection layer 6 that forms bonding; Because no prefabricated information on the blank substrate 1, avoided existing substrate 1 to utilize injection machine during fabrication, to heat high temperature pressing injection mo(u)lding once more from granular PC material of being of petroleum industry is substrate 1, and in the process of injection moulding by the stamper processing procedure of prefabricated information record groove on two substrates 1 respectively, therefore blank substrate 1 is made not only and can large tracts of land be produced in batches, also reduce the discharge capacity of carbon, help environmental protection; Evade CD manufacturing enterprise simultaneously and utilized injection machine that the PC material is heated the technological process of high temperature pressing injection mo(u)lding once more, thereby reduced the industrial chain energy consumption, saved a large amount of energy; Reduced the birefraction of PC substrate 1, improved the quality of products, thus the trend of adaptation current social development low-carbon economy; In addition, encapsulation cover plate adopts innovative papery cover plate 9, has replaced the PC cover plate in the existing DVD9 structure, has not only saved the consumption of PC material, reduces the carbon discharge capacity, and can not cause the pollution of environment when reclaiming and also can be reused, and has the environmental protection characteristics.
Above disclosed only is preferred embodiments of the present invention, can not limit interest field of the present invention with this certainly, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (12)
1. a single-side double-layer light disk is characterized in that, comprising:
Blank substrate;
First recording layer, described first recording layer are formed on the surface of described blank substrate;
Semi-reflective layer, described semi-reflective layer are formed on described first recording layer;
Cushion, described cushion are formed on the described semi-reflective layer;
Second recording layer, described second recording layer is formed on the described cushion;
Total reflection layer, described total reflection layer are formed on described second recording layer;
The papery cover plate, described papery cover plate has relative printing surface and adhesive surface, and
Diaphragm, described diaphragm be formed on the adhesive surface of described papery cover plate and with blank substrate on the total reflection layer that forms bonding.
2. single-side double-layer light disk as claimed in claim 1 is characterized in that, is printed with the CD content label on the printing surface of described papery cover plate.
3. single-side double-layer light disk as claimed in claim 1 is characterized in that, described diaphragm is monox or silicon nitride material.
4. single-side double-layer light disk as claimed in claim 1 is characterized in that, the thickness of described cushion is between 43 microns to 55 microns.
5. single-side double-layer light disk as claimed in claim 1 is characterized in that, the thickness of described first recording layer, second recording layer is all between 2 microns to 4 microns.
6. the manufacture method of a single-side double-layer light disk is characterized in that, may further comprise the steps:
(1) provides the substrate of a blank;
(2) spin coating forms first glue layer on a surface of described blank substrate;
(3) press mold information tunnel forms first recording layer on described first glue layer;
(4) sputter forms semi-reflective layer on described first recording layer;
(5) spin coating forms cushion on described half emission layer;
(6) spin coating forms second glue layer on described cushion;
(7) press mold information tunnel forms second recording layer on described second glue layer;
(8) sputter forms total reflection layer on described second recording layer;
(9) provide a papery cover plate, described papery cover plate has relative printing surface and adhesive surface;
(10) on the adhesive surface of described papery cover plate, form diaphragm;
(11) will be formed with the described papery cover plate of diaphragm and be formed with the bonding formation single-side double-layer light disk of totally reflected blank substrate by glue.
7. the manufacture method of single-side double-layer light disk as claimed in claim 6 is characterized in that, in the described step (11), described glue is spun on the described total reflection layer.
8. the manufacture method of single-side double-layer light disk as claimed in claim 6 is characterized in that, described step (3), (5), (7) also further comprise curing schedule afterwards.
9. the manufacture method of single-side double-layer light disk as claimed in claim 6 is characterized in that, is printed with the CD content label on the printing surface of described papery cover plate.
10. the manufacture method of single-side double-layer light disk as claimed in claim 6 is characterized in that, described diaphragm is monox or silicon nitride material.
11. the manufacture method of single-side double-layer light disk as claimed in claim 6 is characterized in that, the thickness of described cushion is between 43 microns to 55 microns.
12. the manufacture method of single-side double-layer light disk as claimed in claim 6 is characterized in that, the thickness of described first recording layer, second recording layer is all between 2 microns to 4 microns.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010103716 CN101794598A (en) | 2010-01-27 | 2010-01-27 | Single-sided double-layer optical disk and manufacturing method thereof |
| PCT/CN2010/073292 WO2011091634A1 (en) | 2010-01-27 | 2010-05-27 | Single side double layers disc and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010103716 CN101794598A (en) | 2010-01-27 | 2010-01-27 | Single-sided double-layer optical disk and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101794598A true CN101794598A (en) | 2010-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010103716 Pending CN101794598A (en) | 2010-01-27 | 2010-01-27 | Single-sided double-layer optical disk and manufacturing method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101794598A (en) |
| WO (1) | WO2011091634A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS163590A3 (en) * | 1989-04-06 | 1992-06-17 | Mitsui Petrochemical Ind | Optical recording medium and process for producing thereof |
| JPH10143916A (en) * | 1996-11-13 | 1998-05-29 | Victor Co Of Japan Ltd | Optical disk and its production |
| US7067029B2 (en) * | 2000-12-28 | 2006-06-27 | Kitano Engineering Co., Ltd. | Method for manufacturing an optical disc including a single layered disc and a four layered adhesive sheet member for use therein as well as a rolled member thereof |
| CN100359582C (en) * | 2004-03-23 | 2008-01-02 | 株式会社理光 | Method and device for fabricating optical recording medium |
| CN100385540C (en) * | 2004-12-03 | 2008-04-30 | 铼德科技股份有限公司 | Structure of single side double lager writable disposable optic disc and its producing mehtod |
| TW200811854A (en) * | 2006-08-25 | 2008-03-01 | Princo Corp | Single-sided double layer disc with improved protection layer and manufacturing method of the same |
| CN200969221Y (en) * | 2006-10-31 | 2007-10-31 | 苏州新海博数码科技有限公司 | DVD disc |
-
2010
- 2010-01-27 CN CN 201010103716 patent/CN101794598A/en active Pending
- 2010-05-27 WO PCT/CN2010/073292 patent/WO2011091634A1/en active Application Filing
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| WO2011091634A1 (en) | 2011-08-04 |
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Application publication date: 20100804 |