CN2646827Y

CN2646827Y - Double-faced CD structure

Info

Publication number: CN2646827Y
Application number: CNU032767579U
Authority: CN
Inventors: 刘文泉
Original assignee: QUANYAN TECH Co Ltd
Current assignee: QUANYAN TECH Co Ltd
Priority date: 2003-08-26
Filing date: 2003-08-26
Publication date: 2004-10-06
Anticipated expiration: 2013-08-26

Abstract

The utility model relates to a double-sided CD structure, the obverse and reverse surfaces of which are read-write record entities. The CD is provided with an upper and a lower layer respectively, wherein, a bond coat is arranged between the upper layer and the lower layer. A protective layer is arranged above the bond coat, while a reflecting layer, above the protective layer and a dye layer, above the reflecting layer. In addition, a protective layer is arranged below the bond layer, while a reflective layer, below the protective layer, and a dye layer, under the reflecting layer. The upper and lower obverse and reverse surfaces provide the read-write recorded material with a format record with different fomat memory recorded on double surfaces.

Description

The both-sided optical disc structure

Technical field

The utility model relates to a kind of CD, particularly a kind of both-sided optical disc structure.

Background technology

Fig. 1 shows the structure of present employed CD, only has the individual layer recording layer, its processing procedure and CD are similar, load onto stamper earlier on the mould of forming machine, and produce transparent resin substrate with operations such as injection moldings, pass through operations such as sputter again, just the signal face at resin substrate forms metallic reflective coatings such as aluminium matter, is coated with in the above subsequently with adhesive agent, and itself and another substrate is binded, and form a slice disc, republish label at last, pack and finish.

CD, LD be grind, the washed glass stamper, coat resistance material, behind LBR (LaserBeamRecoder), make photoresistance exposure with laser again, so that signal is carved into (Laser Cutting).And the signal of input LBR is the signal that above-mentioned physical format is exported.And the stamper after the imprinting after video picture, conducting film sputter (Spattering), is made pressing mold (Stamper) in the mode of electroforming again.

The original text of DVD is called " DIGITAL VERSATILE DISC ", usually be referred to as " digital versatile disc ", it is to develop out from existing C D-ROM CD, size too, but because of dwindling of digital recording spacing, and the change of recording mode, it is many to make that storable content increases, it can be used for equally storing and comprises various types of numerical datas such as music, video signal, and general computing machine archives material.In addition, at the beginning of the development, DVD is also referred to as " DIGITAL VIDEO DISC " in early days, and Chinese is " Video CD ", but formal afterwards title is decided to be " DIGITAL VERSATILEDISC ", just " digital versatile disc ".

The dynamic film of stored video signal adopts the digital compression technology of MPEG2 grade, and quality can surmount LD video disc, vhs video band, and existing VCD film CD; Stored message adopts the stereophony technology of Doby (DOBBY) AC-3 grade.

Single disc can store a complete high-quality film (more than 135 minutes) that comprises above-mentioned two contents (video signal and message).

In order to meet above-mentioned condition, the capacity of single disc is at least 4.7GB, this capacity is equivalent to 7 times at present general CD discs, size identical with existing C D sheet (diameter 12CM, thickness 1.2MM), and possess compatible forward characteristic, just DVD player must be able to read existing various common CD discs.

DVD discs volume type: single face regeneration one deck: record material on a surface only, capacity is 4.7GB;

Two layers of single face regeneration: record material on a surface only, but can utilize the data spacing to carry out double record again, the capacity of a slice discs is 8.5GB like this.

The read-only format record entity of single face only can provide the single face record, and can't double-sided recording modes, and limits read-only data and can't write record, and not only memory size can't increase, and more causes single face limited space problem.

Summary of the invention

The purpose of this utility model provides a kind of read-write both-sided optical disc structure.

Above-mentioned purpose of the present utility model is to realize like this; a kind of both-sided optical disc structure; it is characterized in that: positive and negative two surfaces of discs are the record entity of read/writable form; this discs branch is set as upper and lower layer; wherein be provided with bonding coat between this upper strata and the lower floor; this bonding coat top is provided with protective seam; this protective seam top is provided with the reflection horizon; and dye coating is set above the reflection horizon; this bonding coat below is provided with protective seam; this protective seam below is provided with the reflection horizon, and dye coating is set below the reflection horizon.

The utility model all can be the record entity of read/write format on positive and negative two surfaces of discs, wherein this discs branch is set as upper and lower layer, dual layer disc can have two-layer content signal to be read for making with one side, and two discrepancys appear, one at reflecting surface with metal and reflection material and the semi-transparent film that forms, another is put then in the middle layer, is controlled at accurately to have same thickness and transparent state.DVD-R is the WORM type, and with DVD-VIDEO, DVD-AUDIO, the DVD-ROM compatibility, the disc cost of manufacture is similar with CD-R, 2.0 up-to-date specification capacity are 4.7GB, the gordian technique that can DAO also can divide section to write DVD-R need to be the read/write head of high precision, because DVD-R gauge have only 0.74 μ m, be half of CD-R, the shortest signal is 0.293um only, be 1/3 of CD-R approximately, the DVD-R slice, thin piece adopts the organic pigment film, so look like purple, can be absorbed by the laser light of 635nm or 650nm wavelength.

The utility model is elaborated with instantiation below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is known single-sided discs chip architecture figure;

Fig. 2 is the utility model both-sided optical disc chip architecture figure;

Fig. 3 is the utility model bonding structure figure;

Fig. 4 is the two-sided detail structure chart of the utility model;

Fig. 5 is that the utility model is formed enforcement figure.

Description of reference numerals: discs 1; Upper strata 2; Lower floor 3; Bonding coat 10; Protective seam 21; Reflection horizon 22; Dye coating 23; Protective seam 31; Reflection horizon 32; Dye coating 33; Preceding system operation 4; Mother matrix operation 41; Ejection formation operation 42; Sputter operation 43; Bind operation 44; Printing process 45; Inspection process 46.

Embodiment

See also as Fig. 2; Fig. 3 and shown in Figure 4; the utility model is a kind of both-sided optical disc structure; it is the record entity that is the read/writable form on discs 1 positive and negative two surfaces; this discs was set as in 1 minute; lower floor 2; 3; wherein be provided with bonding coat 10 between this upper strata 2 and the lower floor 3; can have on this bonding coat 10 or can not be provided with protective seam 21; and these protective seam 21 tops are provided with reflection horizon 22; and dye coating 23 is set above reflection horizon 22; this bonding coat can have for 10 times or can not be provided with protective seam 31 in addition; and these protective seam 31 belows are provided with reflection horizon 32; and dye coating 33 is set below reflection horizon 32; can be record material by on upper strata 2 and lower floor's 3 pros and cons, form two-sided read/writable at least more than one deck, its capacity of record material is about 9.4GB on two surfaces of CD.

The utility model that sees also as shown in Figure 5 provides a kind of both-sided optical disc structure, the manufacturing course of discs: preceding system operation 4 → mother matrix operation 41 → ejection formation operation 42 → sputter operation 43 → bonding operation 44 → printing process 45 → inspection process 46;

The difference of wherein binding operation can be produced the product of different DVD forms, the mode of solidifying all bondings such as glue with hot melt adhesive or UV with the DVD-R of two 0.6mm thickness or R/W semi-manufacture or a slice 0.6mm thickness DVD-R or R/W semi-manufacture and a slice DVD-5 or DVD-9 semi-manufacture through binding the DVD disc of operation made;

Wherein the hot melt adhesive bond techniques be with hot melt adhesive with the type of heating fusion after, in the mode of coating hot melt adhesive is applied to the back side of disc, the mode that the disc of two 0.6mm thickness is fitted is binded through making the substrate of two .6mm thickness after the cooling cooling again;

Wherein the ultraviolet light gluing is combined into the ultraviolet optical cement is coated disc substrates, the disc substrates of two 0.6mm thickness is fitted again, and the irradiation through ultraviolet light makes ultraviolet light bind the bonding mode of adhesive curing again.

Aforementioned lights disc 1 upper strata 2 set read/writable memory forms are provided with storing literal and audio-visual form data, and its lower floor's 3 be made ass are except that the makrolon material laminar substrate.

Below the utility model and conventional art are compared:

Conventional art

1, record material on a surface only.

2, the read-only format record entity of single face only can provide the single face record.

3, can't two-sided record.

4, the read-only data of restriction can't write record.

5, not only memory size can't increase.

6, single face limited space problem.

The utility model

1, double-sided recording modes, a slice CD have two optic disc base board capacity.

2, the classification that has individual layer and double-deck record to write.

3, capacity surmounts existing C D-ROM CD (being about 650MB) far away, even also exceeds hard-disk capacity (about 2GB to 4GB).

4, two-sided read/write format record entity.

Claims

1, a kind of both-sided optical disc structure; it is characterized in that: positive and negative two surfaces of discs are the record entity of read/writable form; this discs branch is set as upper and lower layer; wherein be provided with bonding coat between this upper strata and the lower floor, this bonding coat top is provided with protective seam, and this protective seam top is provided with the reflection horizon; and dye coating is set above the reflection horizon; this bonding coat below is provided with protective seam, and this protective seam below is provided with the reflection horizon, and dye coating is set below the reflection horizon.

2, both-sided optical disc structure as claimed in claim 1 is characterized in that, lower floor's be made as is except that the makrolon material laminar substrate.