CN1326138C - Optical information storage medium - Google Patents

Optical information storage medium Download PDF

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Publication number
CN1326138C
CN1326138C CNB2004100699188A CN200410069918A CN1326138C CN 1326138 C CN1326138 C CN 1326138C CN B2004100699188 A CNB2004100699188 A CN B2004100699188A CN 200410069918 A CN200410069918 A CN 200410069918A CN 1326138 C CN1326138 C CN 1326138C
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CN
China
Prior art keywords
layer
reflection horizon
recording layer
optical information
recording
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Expired - Fee Related
Application number
CNB2004100699188A
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Chinese (zh)
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CN1725331A (en
Inventor
萧在莒
傅世民
张汉宜
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Prodisc Technology Inc
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Prodisc Technology Inc
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Priority to CNB2004100699188A priority Critical patent/CN1326138C/en
Publication of CN1725331A publication Critical patent/CN1725331A/en
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Publication of CN1326138C publication Critical patent/CN1326138C/en
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Abstract

The present invention relates to an optical information storage medium which comprises a first base plate, a first recording layer, a first reflecting layer, a separation layer, a second recording layer, a barrier 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 material of the second recording layer is inorganic material, the barrier layer is arranged on the second recording layer, the second reflecting layer is arranged on the barrier layer, the material of the second reflecting layer is the inorganic material, and the second base plate is arranged on the second reflecting layer. The optical information storage medium of the present invention can be used for reducing required power when laser light is used for writing. Therefore, the requirement of the power of a laser diode in a CD driver can be reduced. Accordingly, the production cost of the CD driver is also reduced.

Description

Media for storing optical information
Technical field
The present invention is about a kind of media for storing optical information, the media for storing optical information of especially a kind of single-surface double-layer DVD-R.
Background technology
Along with information and multimedia arriving from generation to generation, electronic product 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 recording media.Be to preponderate in the market with optical recording media, its comprise CD-ROM (CD-ROM), writable disposable type CD (CD-R), rewritable type CD (CD-RW), read-only type Video CD (DVD-ROM), writable disposable type Video CD (DVD-R), rewritable formula Video CD (DVD-RW, DVD+RW) and dynamic random memory Video CD (DVD-RAM) or the like.
In the face of more and more huge audio and video information amount, improve the volume of information of CD, 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 duallayer), their storage volume scope does not wait from 4.7GB to 17GB yet from individual layer single face (single side single layer), two-sided individual layer (dual side singlelayer), 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 disc 10 contains one first substrate 11, one first recording stack (first recordingstack, L 0) 12, one wall 13, one second recording stack (second recording stack, L 1) 14, and one second substrate 15.Wherein, first recording stack (first recording stack, L 0) 12 and second recording stack (second recording stack, L 1) 14 be coated on the data face of first substrate 11 and second substrate 15, and wall 13 is interposed between first recording stack 12 and second recording stack 14.
As shown in Figure 1, when data write or reads, laser can pass first substrate 11 and focus on first recording stack 12, or passed wall 13 to focus on second recording stack 14.That is to say that laser can send the light of two kinds of different capacities, to focus on respectively on the different recording stacks.
First recording stack 12 has one first recording layer 121, reaches one first reflection horizon 122; And second recording stack 14 has one second recording layer 141, reaches one second reflection horizon 142.Carry out data to second recording stack 14 and write fashionablely when the laser desire arrives, owing to will pass first reflection horizon 122, and first reflection horizon 122 is a semi-reflective layer, and this makes the power only remaining 50% that passes the laser behind first recording stack 12.Therefore in order to have enough energy to carry out writing of data, the laser diode of CD-ROM drive needs to send the above laser of certain power.Generally speaking, the power of laser diode must have more than the 20mW-30mW just can carry out writing of data, and the speed that writes is faster, and the required power of laser diode is also healed high.
Yet the required power of laser diode is healed high, and manufacturing cost is also higher certainly.Therefore, how to reduce the required power of laser, and then reduce production costs, be the constantly direction of thinking of industry always.
Because the problems referred to above, the present invention is because of in this, urgently think a kind of can solve known single-surface double-layer DVD-R disc write fashionable, " media for storing optical information " of the high-power laser problem of needs.
Summary of the invention
Purpose of the present invention is for providing a kind of media for storing optical information, and it can the reduction data writes the power of fashionable required laser diode.
For reaching above-mentioned purpose,, comprise one first substrate, one first recording layer, one first reflection horizon, a wall, one second recording layer, a barrier layer, one second reflection horizon and one second substrate according to media for storing optical information of the present invention.Wherein, first recording layer is arranged on first substrate, first reflection horizon is arranged on first recording layer, wall is arranged on first reflection horizon, second recording layer is arranged on the wall, and the material of second recording layer be selected from germanium sulfide, and the sulfuration boron at least one of them, the thickness of this second recording layer is 200nm to 300nm; Barrier layer is arranged on second recording layer, the material of this barrier layer be selected from zinc sulphide-monox, zinc sulphide at least one of them, the thickness of this barrier layer is 15nm to 80nm; Second reflection horizon is arranged on the barrier layer, and the material in second reflection horizon is an inorganic material, and second substrate is arranged on second reflection horizon.
From the above, media for storing optical information of the present invention has by second recording layer, the formed sandwich structure of the barrier layer and second reflection horizon.Compared to the prior art, media for storing optical information of the present invention, fashionable when writing with laser, laser can destroy the structure of barrier layer, and makes second recording layer and second reflection horizon contact, and carries out spontaneous themopositive reaction.The energy that reaction is produced can be write fashionable desired power in order to reduce laser.Therefore, the requirement of laser diode power can reduce in the CD-ROM drive, and then has also reduced the production cost of CD-ROM drive.If the material of selecting for use can be emitted bigger heat energy after reaction, even can make the laser diode of low power speed CD-ROM drive carry out writing than the data of high power speed.Moreover, carry out the product behind the emitted response, for the ionic covalent bond crystal of tool, because of its Stability Analysis of Structures, thus can guarantee the stability of the second recording stack structure, and then also promoted the quality of product.
Description of drawings
One rough schematic of the known single-surface double-layer Video CD of Fig. 1; And
One synoptic diagram of Fig. 2 media for storing optical information of the present invention.
Symbol description among the figure:
10 single-surface double-layer DVD-R discs
11 first substrates
12 first recording stacks
121 first recording layers
122 first reflection horizon
13 walls
14 second recording stacks
141 second recording layers
142 second reflection horizon
15 second substrates
20 single-surface double-layer DVD-R discs
21 first substrates
22 first recording layers
23 first reflection horizon
24 walls
25 second recording layers
26 barrier layers
27 second reflection horizon
28 second substrates
L 0First recording stack
L 1Second recording stack
Embodiment
Hereinafter with reference to relevant drawings, the media for storing optical information according to preferred embodiment of the present invention is described.
Media for storing optical information of the present invention comprises the single-surface double-layer Video CD (DVD-R) of writing dispensable mould.In the present embodiment, be example, with the preferred embodiment of explanation media for storing optical information of the present invention with the DVD-R disc 20 of single-surface double-layer.
As shown in Figure 2, single-surface double-layer DVD-R disc 20 comprises one first substrate 21, one first recording layer 22, one first reflection horizon 23, a wall 24, one second recording layer 25, a barrier layer 26, one second reflection horizon 27 and one second substrate 28.
Wherein, first recording layer 22 and first reflection horizon 23 can be collectively referred to as the first recording stack L 0, and second recording layer 25, barrier layer 26 and second reflection horizon, 27 formed sandwich structures can be collectively referred to as the second recording stack L 1
First substrate 21 and second substrate 28 material of normal use are that (Polycarbonate PC), is characterized in having good optical character and chemical stability to polycarbonate.In the present embodiment, first substrate 21 and second substrate 28 be with the polycarbonate ejection formation, and make the have prerecording ditch groove substrate of (pre-grooved).
First recording layer 22 is arranged on first substrate 21.The material of first recording layer 22 can be organic dyestuff or inorganic material.In the present embodiment, the material of first recording layer 22 is an organic dyestuff, and forms in the rotary coating mode.
First reflection horizon 23 is located on first recording layer 22, and first reflection horizon 23 is a semi-reflective layer (semi-reflective layer), and its material is simple metal or its alloy, for example is silver or silver alloy, aluminum or aluminum alloy and gold or billon or the like.And the generation type in first reflection horizon 23 normally utilizes sputter or evaporation mode to form.In the present embodiment, first reflection horizon 23 is a silver.
Wall 24 is arranged on first reflection horizon 23.Wall 24 is made of a light binding, and it is a liquid at the beginning, but after being exposed to radiation, the polymer resin that curable one-tenth one is solid-state, and thickness is approximately 42 μ m～53 μ m, to distinguish the light that the different recording layer is reflected.
Second recording layer 25 is arranged on the wall 24, and the material of second recording layer 25 is an inorganic material, can utilize the mode of vacuum splashing and plating to form, and the thickness of second recording layer 25 is about 200nm to 300nm.In the present embodiment, the material of second recording layer 25 is selected from germanium sulfide (GeS 2), and sulfuration boron (B 2S 3) at least one of them.In the present embodiment, second recording layer 25 is that the germanium sulfide of 200nm is an example with thickness.
Barrier layer 26 is arranged on second recording layer 25, and barrier layer 26 can be inorganic material, and the material of barrier layer 26 is selected from zinc sulphide-monox (ZnS-SiO 2), and zinc sulphide (ZnS) at least one of them, can utilize the mode of vacuum splashing and plating to form, and the thickness of barrier layer 26 is about 15nm to 80nm.In the present embodiment, barrier layer 26 is an example with zinc sulphide-monox.
Second reflection horizon 27 is arranged on the barrier layer 26, and second reflection horizon 27 can be inorganic material.The material in second reflection horizon 27 is selected from bismuth ashbury metal (Bi x-Sn (1-x)Alloy), antimony germanium (GeSb), indium tin (InSn), boron oxide (B 2O 3), aluminium, silver at least one of them, can utilize the mode of vacuum splashing and plating to form, and the thickness in second reflection horizon 27 is about 200nm to 300nm.In the present embodiment, second reflection horizon 27 is that the sn-bi alloy (Bi-Sn) of 200nm is example with thickness.
Second substrate 28 is arranged on second reflection horizon 27, and second substrate 28 can utilize one to bind glue, to be bonding on second reflection horizon 27.
Barrier layer 26 is arranged between second recording layer 25 and second reflection horizon 27, writes fashionablely when carrying out data, and laser is by the first recording stack L 0Side enters the disc laser diode and sends the laser of different capacity, to focus on the first recording stack L respectively 0And the second recording stack L 1, to carry out writing of data.
In the present embodiment, second recording layer 25, barrier layer 26 and second reflection horizon 27 can be respectively germanium sulfide or zinc sulphide-monox or sn-bi alloy (Bi-Sn).When bigger power laser focuses to the second recording stack L 1Write fashionable to carry out data, instantaneously heated high temperature, impel barrier layer 26 deformation and destroy, make second recording layer 25 and second reflection horizon 27 be contacted and carry out spontaneous themopositive reaction (Spontaneous Exothermic Reation), to emit a latent heat.In the present embodiment,, in the volume of a bit length, can obtain 2.76 * 10 approximately through spontaneous themopositive reaction 15～6.59 * 10 15The energy of mW/mole, approximate have 3.82mW power laser radiation in this interval.Therefore, by this energy, can reduce laser and write fashionable desired power.If the material of selecting for use can be emitted bigger heat energy after reaction, even can make the laser diode of low power speed CD-ROM drive carry out writing than the data of high power speed.
On the other hand, carry out product behind the emitted response, for the ionic covalent bond crystal of tool, have high-melting-point and high boiling characteristic, because of its Stability Analysis of Structures, so can guarantee the second recording stack L by the material in second recording layer 25 and second reflection horizon 27 1The stability of structure.
In sum, media for storing optical information of the present invention has by second recording layer, the formed sandwich structure of the barrier layer and second reflection horizon.Compared to the prior art, media for storing optical information of the present invention, fashionable when writing with laser, laser can destroy the structure of barrier layer, and makes second recording layer and second reflection horizon contact, and carries out spontaneous themopositive reaction.The energy that reaction is produced can be write fashionable desired power in order to reduce laser.Therefore, the requirement of laser diode power can reduce in the CD-ROM drive, and then has also reduced the production cost of CD-ROM drive.If the material of selecting for use can be emitted bigger heat energy after reaction, even can make the laser diode of low power speed CD-ROM drive carry out writing than the data of high power speed.Moreover, carry out the product behind the emitted response, for the ionic covalent bond crystal of tool, because of its Stability Analysis of Structures, thus can guarantee the stability of the second recording stack structure, and then also promoted the quality of product.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the described claim scope its equivalent modifications of carrying out or change.

Claims (6)

1. media for storing optical information is characterized in that comprising:
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, the material of this second recording layer for be selected from germanium sulfide, and the sulfuration boron at least one of them, the thickness of this second recording layer is 200nm to 300nm;
One barrier layer, it is arranged on this second recording layer, the material of this barrier layer be selected from zinc sulphide-monox, zinc sulphide at least one of them, the thickness of this barrier layer is 15nm to 80nm;
One second reflection horizon, it is arranged on this barrier layer, and the material in this second reflection horizon is an inorganic material;
One second substrate, it is arranged on this second reflection horizon.
2. media for storing optical information as claimed in claim 1, wherein this media for storing optical information is for writing dispensable mould single-surface double-layer Video CD.
3. media for storing optical information as claimed in claim 1, wherein this first reflection horizon is a semi-reflective layer.
4. media for storing optical information as claimed in claim 1, wherein the material in this second reflection horizon be selected from bismuth ashbury metal, antimony germanium, indium tin, boron oxide, aluminium, silver at least one of them.
5. media for storing optical information as claimed in claim 1, when carry out data write fashionable, this barrier layer of a laser damage, this second recording layer and this second reflection horizon react to each other, to emit a latent heat.
6. media for storing optical information as claimed in claim 1, wherein the thickness in this second reflection horizon is 200nm to 300nm.
CNB2004100699188A 2004-07-19 2004-07-19 Optical information storage medium Expired - Fee Related CN1326138C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100699188A CN1326138C (en) 2004-07-19 2004-07-19 Optical information storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100699188A CN1326138C (en) 2004-07-19 2004-07-19 Optical information storage medium

Publications (2)

Publication Number Publication Date
CN1725331A CN1725331A (en) 2006-01-25
CN1326138C true CN1326138C (en) 2007-07-11

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188214A (en) * 1975-08-11 1980-02-12 Fuji Photo Film Co., Ltd. Recording material
CN2550876Y (en) * 2002-07-04 2003-05-14 铼德科技股份有限公司 Structure of super thin type digital laser video disc

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4188214A (en) * 1975-08-11 1980-02-12 Fuji Photo Film Co., Ltd. Recording material
CN2550876Y (en) * 2002-07-04 2003-05-14 铼德科技股份有限公司 Structure of super thin type digital laser video disc

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Granted publication date: 20070711