CN100378838C - Optical storage media - Google Patents

Optical storage media Download PDF

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Publication number
CN100378838C
CN100378838C CNB2005100630083A CN200510063008A CN100378838C CN 100378838 C CN100378838 C CN 100378838C CN B2005100630083 A CNB2005100630083 A CN B2005100630083A CN 200510063008 A CN200510063008 A CN 200510063008A CN 100378838 C CN100378838 C CN 100378838C
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China
Prior art keywords
layer
storage media
data storage
optical data
recording layer
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Expired - Fee Related
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CNB2005100630083A
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CN1841536A (en
Inventor
张汉宜
蔡正原
萧在莒
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Prodisc Technology Inc
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Prodisc Technology Inc
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Abstract

The present invention relates to an optical message storage medium which comprises a first base plate, a first recording layer, a first reflecting layer, a separation layer, a second recording layer, a second reflecting layer and a second base plate, wherein the first recording layer is arranged on the first base plate, the first reflecting layer is arranged on the first recording layer, the separation layer is arranged on the first reflecting layer, the second recording layer is arranged on the separation layer, the second reflecting layer is arranged on the second recording layer, and the second base plate is arranged on the second reflecting layer and provided with a groove of which the depth is smaller than 100 nm. The present invention can be used for manufacturing the optical message storage medium with good signals before burn and recordation. Moreover, both of the reflecting rates of a first recording and accumulating layer and a second recording and accumulating layer are also larger than 16%, which can make a general commercial optical disc machine carry out read-write actions.

Description

Optical data storage media
Technical field
The present invention relates to a kind of optical data storage media, particularly relate to a kind of optical data storage media with high storage density.
Background technology
Along with the arriving of information and multimedia era, comprise that 3C (Computer, Communication, the Consumer electronics) product of computer, communication, consumer electronics also constantly increases for the storage density of Storage Media and the demand of capacity.Traditional Storage Media can be divided into two big classes haply, is respectively magnetic recording medium and optical data storage media.Be to preponderate in the market with optical data storage media, its be comprise read-only type laser disc (CD-ROM), writable disposable type laser disc (CD-R), rewritable type laser disc (CD-RW), read-only type Digital A laser disc (DVD-ROM), writable disposable type Digital A laser disc (DVD-R), rewritable formula Digital A laser disc (DVD-RW, DVD+RW) and dynamic random memory Digital A laser disc (DVD-RAM) or the like.
In the face of more and more huge audio-visual information amount, improve the volume of information of laser disc, be the target that industrial community is pursued always.And therefore DVD has occupied certain ratio because have the information storage capacity bigger than CD on light memory medium market.Present DVD has different outward appearance patterns, to two-sided bilayer (dual side dual layer), their storage volume scope does not wait from 4.7GB to 17GB yet from single-surface single-layer (single side single layer), two-sided individual layer (dual side single layer), single-surface double-layer (single side dual layer).
Single-surface double-layer DVD-R with 8.5GB capacity because capacity is big, adds the structure of writable disposable, also more and more is subjected to market and payes attention to.As shown in Figure 1, known single-surface double-layer DVD-R video disc 10 is to contain one first substrate 11, one first record lamination (first recording stack, L 0) 12, one wall 13, one second record lamination (second recording stack, L 1) 14, and one second substrate 15.Wherein, first record lamination (first recording stack, the L 0) 12 and second record lamination (second recording stack, the L 1) the 14th, be coated on the data face of first substrate 11 and second substrate 15, and wall 13 is interposed between the first record lamination 12 and the second record lamination 14.Generally speaking, the first record lamination 12 and the second record lamination 14 comprise a recording layer one reflection horizon respectively.When data read, laser can pass first substrate 11 and focus on the first record lamination 12, or passed and ask that interlayer 13 is to focus on the second record lamination 14.
In prior art, the single-surface double-layer DVD-R video disc 20 that information storage capacity is bigger, the mode of making has two kinds, a kind of is photopolymerization processing procedure (Photo-Polymerization Process, 2PProcess), another kind then is to bind processing procedure (Bonding process), claims counter-rotating processing procedure (Inversed Process) again, below will do one to aforementioned two kinds of processing procedures and simply introduce:
1, photopolymerization processing procedure: please refer to shown in Figure 2ly, it is to have on first substrate 21 of pre-rail groove at quarter (pre-grooved) one, successively rotary coating (Spin-coating) one first organic dye layer 22 and one first reflection horizon 23.After spraying light binding (photo-setting resin) 25 on first reflection horizon 23, pressing one has the video disc masterplate (disc stamper) 24 of prerecording ditch groove.Behind rayed curing colloid, promptly form a wall 26.Then, divest video disc masterplate 24, can on wall 26, form prerecording ditch groove.Rotary coating one second organic dye layer 27 and one second reflection horizon 28 are in wall 26.At last, bind one second substrate 29 again, promptly finish the making of video disc.
2, bind processing procedure: please refer to shown in Figure 3ly, it is to have on first substrate 21 of pre-rail ditch (pre-grooved) one, forms an organic dye layer 22 and one first reflection horizon 23 successively; And have on second substrate 29 of pre-rail ditch one, form one second reflection horizon 28 and one second organic dye layer 27 successively.Then, utilize light binding 25 to bind first reflection horizon 23 and second organic dye layer 27, solidify light binding 25 at last again,, promptly finish the making of video disc to form a wall 26.
Because pressing that the photopolymerization processing procedure is many and divest the step of video disc masterplate 24, also cause the photopolymerization process rate on the low side, and the involving great expense of video disc masterplate 24, it is high that event makes that the production cost of photopolymerization processing procedure binds processing procedure, therefore make and utilize the lower bonding processing procedure of production cost, producing single-surface double-layer DVD-R video disc becomes the target that industry is pursued.
Utilize the video disc that binds the processing procedure manufacturing in the prior art, the gash depth of its first substrate 21 and second substrate 29 is to be respectively 100nm to 160nm, and the thickness of recording layer dye then is about 70nm to 130nm.Yet under this specification, the yield of video disc is on duty mutually.When the optical read head reading signal, usually can't obtain the preceding signal (Blank) of effective burning, so the also action that can't allow CD-ROM device read and write in this video disc.
Therefore, how to find suitable video disc parameter, to allow the bonding processing procedure of potentiality with low production cost can produce the preferable single-surface double-layer DVD-R video disc of yield, be the target that industry is pursued always.
Because the problems referred to above, this case inventor urgently thinks a kind of " optical data storage media " of novelty, when making to solve optical data storage media utilization bonding processing procedure, can't obtain the problem of the preceding signal of effective burning.
This shows that above-mentioned existing optical data storage media obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem that optical data storage media exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing optical data storage media exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of optical data storage media of new structure, can improve general existing optical data storage media, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing optical data storage media exists, and provide a kind of optical data storage media of new structure, technical matters to be solved is it can be utilized bind processing procedure making single-surface double-layer DVD-R video disc and obtain the preceding signal of effective burning, make CD-ROM device can read and write video disc smoothly, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of optical data storage media that the present invention proposes, it comprises: one first substrate; One first recording layer, it is arranged on this first substrate; One first reflection horizon, it is arranged on this first recording layer; One wall, it is arranged on this first reflection horizon; One second recording layer, it is arranged on this wall; One second reflection horizon, it is arranged on this second recording layer; And one second substrate, it is arranged on this second reflection horizon, and this second substrate is to have a groove, and the degree of depth of this groove is less than 100nm, and the bottom of trench wall and this groove is to form an angle, and this angle is to be about 25 degree to 75 degree.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid optical data storage media is to write dispensable mould single-surface double-layer Digital A laser disc for one.
Aforesaid optical data storage media, wherein said first reflection horizon and this second recording layer are to bind mutually with this wall.
Aforesaid optical data storage media, the thickness of wherein said second recording layer is about 140nm to 220nm.
Aforesaid optical data storage media, the halfwidth of wherein said groove is about 200nm to 520nm.
Aforesaid optical data storage media, the degree of depth of wherein said groove is about 20nm to 80nm.
Aforesaid optical data storage media more comprises: a cushion, it is to be arranged between this second recording layer and this wall.
Aforesaid optical data storage media, the material of wherein said cushion are to be silicon nitride, monox or zinc sulphide-monox.
By technique scheme, optical data storage media of the present invention has following advantage at least:
Cause is less than 100nm according to the gash depth of second substrate of optical data storage media of the present invention.Compared with prior art, after optical data storage media of the present invention reduces the gash depth of second substrate, can produce optical data storage media with the preceding signal of preferable burning, and first the record lamination and second the record lamination reflectivity also all greater than 16%, the action that can allow general commercial CD-ROM device read and write.That is to say that optical data storage media of the present invention has been found out and has been fit to mass-produced condition, and can meet the read-write demand of general commercial CD-ROM device, the much progress on the industry of can saying so.
In sum, the optical data storage media of special construction of the present invention can utilize and bind processing procedure making single-surface double-layer DVD-R video disc and obtain the preceding signal of effective burning, makes CD-ROM device can read and write video disc smoothly.It has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it all has bigger improvement on product structure or function, have large improvement technically, and produced handy and practical effect, and more existing optical data storage media has the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the synoptic diagram for existing known single-surface double-layer DVD-R video disc;
Fig. 2 is a manufacturing process synoptic diagram of existing known single-surface double-layer DVD-R video disc, and it is to use the photopolymerization processing procedure;
Fig. 3 is a manufacturing process synoptic diagram of existing known single-surface double-layer DVD-R video disc, and it is to use the bonding processing procedure;
Fig. 4 is the synoptic diagram for optical data storage media of the present invention; And
Fig. 5 is the synoptic diagram for second substrate of optical data storage media of the present invention.
10: 11: the first substrates of single-surface double-layer DVD-R video disc
12: the first record laminations 13: wall
15: the second substrates of 14: the second record laminations
20: 21: the first substrates of single-surface double-layer DVD-R video disc
23: the first reflection horizon of 22: the first organic dye layers
24: video disc masterplate 25: light binding
26: 27: the second organic dye layers of wall
29: the second substrates in 28: the second reflection horizon
30: 31: the first substrates of optical data storage media
33: the first reflection horizon of 32: the first recording layers
34: wall 35: cushion
37: the second reflection horizon of 36: the second recording layers
38: the second substrate L 0: the first record lamination
L 1: the second record lamination G: groove
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of optical data storage media, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Please refer to shown in Figure 4ly, optical data storage media 30 is to comprise one first substrate 31, one first recording layer 32, one first reflection horizon 33, a wall 34, one second recording layer 36, one second reflection horizon 37 and one second substrate 38.In the present embodiment, optical data storage media 30 is to write dispensable mould single-surface double-layer Digital A laser disc for one, and utilizes and bind processing procedure (Bonding Process) and form.
First recording layer 32 is arranged on first substrate 31.The material of first recording layer 32 can be organic dyestuff or inorganic material.In the present embodiment, the material of first recording layer 32 is to be organic dyestuff, and forms in the rotary coating mode.
First reflection horizon 33 is provided in a side of on first recording layer 32, first reflection horizon 33 is to be a semi-reflective layer (semi-reflective layer), its material is to be simple metal or its alloy, for example is silver or silver alloy and aluminum or aluminum alloy, gold or billon or the like.And the generation type in first reflection horizon 33 normally is used to form sputter or the evaporation mode forms.
Wall 34 is arranged on first reflection horizon 33.Wall 33 is to be made of a light binding, and it is to be liquid at the beginning, but behind radiation irradiation, can be solidified into a solid-state polymer resin.
In the present embodiment, optical data storage media 30 more can comprise a cushion 35, and it is to be arranged between second recording layer 36 and the wall 34.Wherein, the material of cushion 35 is to be silicon nitride, monox or zinc sulphide-monox.
Second recording layer 36 is arranged on the wall 34, and the material of second recording layer 36 can be inorganic material or organic dyestuff, can utilize modes such as sputter, evaporation or coating to form.
Second reflection horizon 37 is arranged on second recording layer 36, and second reflection horizon 37 is to can be semiconductor or conductor alloy firm.
Second substrate 38 is arranged on second reflection horizon 37.Wherein, first substrate 31 and second substrate 38 the material of normal use be that (Polycarbonate PC), is characterized in having good optical character and chemical stability to polycarbonate.Certainly, the material of first substrate 31 and second substrate 38 also can be other transparent material.In the present embodiment, first substrate 31 and second substrate 38 are with the polycarbonate injection molding, and make the have prerecording ditch groove substrate of (pre-grooved).Wherein, the degree of depth of second substrate, 38 groove G is less than 100nm, and preferable aspect is 20nm to 80nm.In addition, optical data storage media 30 reads, writes or when erasing, and is not limited in the protruding rail (Land or " on Groove ") of first substrate 31 and second substrate 38 or the recessed rail (Groove or " in Groove ") to carry out.
In order to allow DVD-ROM laser disc function read the first record lamination L of the DVD-R video disc of single-surface double-layer smoothly 0Reach the second record lamination L 1, then need satisfy reflectivity greater than 16% requirement.But under the constant situation of reflection horizon and recording layer thickness, if the gash depth of second substrate 38 is darker, then reflectivity also can be littler.Therefore, the present invention is that the gash depth with known second substrate 38 diminishes, to satisfy the demand of CD-ROM device for the video disc reflectivity.
Please refer to shown in Figure 5ly, the degree of depth of groove G is D; The halfwidth of groove G (Half-High Width) is W; The bottom of trench wall and groove G is to form an angle A.When the degree of depth of groove G is 30nm, the halfwidth W of groove G is about 400nm, and angle A is about 30 degree, and second recording layer 36 utilizes the optical data storage media that binds the processing procedure made, its first record lamination L when having the AZO dyestuff of 160nm thickness 0Reach the second record lamination L 1Reflectivity, all can be greater than 16%, and can obtain signal (Blank) before the effective burning, for example: recommend before signal (Push Pull), the record swing signal (NWS) after unitized and signal to noise ratio (WNR) of record swing signal or the like before and after the record.
In addition, when the degree of depth of groove G is 80nm, the halfwidth W of groove G is about 350nm, and angle A is about 55 degree, and second recording layer 36 utilizes the optical data storage media that binds the processing procedure made, its first record lamination L when having the AZO dyestuff of 160nm thickness 0Reach the second record lamination L 1Reflectivity, also all can be, and can obtain signal before the effective burning greater than 16%.
In sum, the gash depth of second substrate of optical data storage media of the present invention is less than 100nm.Compared with prior art, after optical data storage media of the present invention reduces the gash depth of second substrate, can produce optical data storage media with the preceding signal of preferable burning, and first the record lamination and second the record lamination reflectivity also all greater than 16%, the action that can allow general commercial CD-ROM device read and write.That is to say that optical data storage media of the present invention has been found out and has been fit to mass-produced condition, and can meet the read-write demand of general commercial CD-ROM device, the much progress on the industry of can saying so.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.

Claims (8)

1. optical data storage media is characterized in that it comprises:
One first substrate;
One first recording layer, it is arranged on this first substrate;
One first reflection horizon, it is arranged on this first recording layer;
One wall, it is arranged on this first reflection horizon;
One second recording layer, it is arranged on this wall;
One second reflection horizon, it is arranged on this second recording layer; And
One second substrate, it is arranged on this second reflection horizon, and this second substrate is to have a groove, and the degree of depth of this groove is less than 100nm, and the bottom of trench wall and this groove is to form an angle, and this angle is to be about 25 degree to 75 degree.
2. optical data storage media according to claim 1 is characterized in that it is to write dispensable mould single-surface double-layer Digital A laser disc for one.
3. optical data storage media according to claim 1 is characterized in that wherein said first reflection horizon and this second recording layer, is to bind mutually with this wall.
4. optical data storage media according to claim 1 is characterized in that the thickness of wherein said second recording layer is about 140nm to 220nm.
5. optical data storage media according to claim 1 is characterized in that the halfwidth of wherein said groove is about 200nm to 520nm.
6. optical data storage media according to claim 1 is characterized in that the degree of depth of wherein said groove is about 20nm to 80nm.
7. optical data storage media according to claim 1 is characterized in that more comprising:
One cushion, it is to be arranged between this second recording layer and this wall.
8. optical data storage media according to claim 1, the material that it is characterized in that wherein said cushion are to be silicon nitride, monox or zinc sulphide-monox.
CNB2005100630083A 2005-04-01 2005-04-01 Optical storage media Expired - Fee Related CN100378838C (en)

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Application Number Priority Date Filing Date Title
CNB2005100630083A CN100378838C (en) 2005-04-01 2005-04-01 Optical storage media

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Application Number Priority Date Filing Date Title
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CN100378838C true CN100378838C (en) 2008-04-02

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1067535A2 (en) * 1999-07-02 2001-01-10 Pioneer Corporation Information recording medium
CN1335614A (en) * 2000-07-19 2002-02-13 索尼株式会社 Method for producing multilayer optical recording medium
WO2004105009A1 (en) * 2003-05-22 2004-12-02 Ricoh Company, Ltd. Optical recording medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1067535A2 (en) * 1999-07-02 2001-01-10 Pioneer Corporation Information recording medium
CN1335614A (en) * 2000-07-19 2002-02-13 索尼株式会社 Method for producing multilayer optical recording medium
WO2004105009A1 (en) * 2003-05-22 2004-12-02 Ricoh Company, Ltd. Optical recording medium

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