CN201111898Y

CN201111898Y - Plane thin type DVD5 read-only optical disc with 80mm diameter

Info

Publication number: CN201111898Y
Application number: CNU2007200439086U
Authority: CN
Inventors: 承铁冶; 蒋建华; 包丽群; 华丽星
Original assignee: JIANGSU XINGUANGLIAN TECHNOLOGY Co Ltd
Current assignee: JIANGSU XINGUANGLIAN TECHNOLOGY Co Ltd
Priority date: 2007-10-19
Filing date: 2007-10-19
Publication date: 2008-09-10
Anticipated expiration: 2017-10-19

Abstract

The utility model relates to a planar and thin DVD 5 CD-ROM with the diameter of 80 mm. The CD-ROM comprises an information substrate and a compact disc which is arranged on the information substrate and is composed of a reflective layer and a protective layer; the compact disc is provided with a central hole and an information area of the compact disc and a holding area are arranged on the compact disc; both the information area of the compact disc and the holding area have the thickness of 0.54 to 0.90 mm and the height difference between the end face of the information area of the compact disc and that of the holding area is less than or equal to 0.3 mm. The CD-ROM provided by the utility model is thin and the thickness thereof can be reduced to be 0.54 to 0.90 mm. The CD-ROM has light weight and the weight of each CD-ROM can be reduced by 1.65 to 3.63 g and to be a value 0.45 to 0.75 times the weight of the existing DVD 5 CD-ROM, which does not affect actual application and significantly saves raw materials; meanwhile, the CD-ROM is also beneficial to printing on the disc surface and ensures that the whole compact disc surface is printed.

Description

The thin plane DVD5 read-only optical disc of diameter 80mm

Technical field

The utility model relates to a kind of DVD read-only optical disc, and relating in particular to a kind of diameter is the thin plane DVD5 read-only optical disc of 80mm.

Background technology

At present, to mainly contain the card diameter be 120mm and two kinds of basic specifications of 80mm to the DVD read-only optical disc of widespread use.Compact disc substrate is injection molded by polycarbonate pc (PC particle).CD is divided into block of information 1 and 2 two main region of clamp area, and disk thickness is 1.2mm.

The DVD5 read-only optical disc adopts two double-deckers that the 0.6mm substrate is bonding, and gross thickness is 1.2mm.Be made of with information substrate 3 printed layers 7, supporting substrate 6, bonding coat 5, reflection horizon 4, and center pit is arranged, wherein the one side of information substrate 3 is an information faces 8, and another side is a reading face 9, sees accompanying drawing 1,2.

Read to coil laser and enter the information substrate from optical disk reading face and arrive information faces and read information, the layer reflection that be reflected then received by the CD-ROM drive sensor.Supporting substrate does not comprise information, mainly plays a part to support and gains in strength.

The thickness of CD clamping zone is the size that matches with CD-ROM drive, and the clamp area thickness of all CDs all unifies to be designed to 1.2mm at present.

In use there are the following problems for existing product:

For the card diameter is 80mm DVD5 read-only optical disc, still adopts two double-deckers that the 0.6mm substrate is bonding.But, make it consume more materials, increase manufacturing cost not along with the diminishing and the thickness of corresponding minimizing CD of card diameter.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of thin thickness, in light weight, the 80mm single layer structure DVD5 read-only optical disc that saves material, do not have supporting substrate are provided.

The technical scheme that provides according to the utility model; comprise information substrate and reflection horizon provided thereon, the CD that protective seam constitutes; CD is provided with center pit; on CD, be provided with optical disc information district and clamp area; optical disc information district and clamp area thickness are 0.54～0.90mm, and the difference in height of optical disc information district end face and clamp area end face is less than or equal to 0.3mm.

Optical disc information district thickness is identical with clamp area thickness, and the upper and lower end face in optical disc information district is all fair with the upper and lower end face of clamp area.On protective seam, be provided with the printed label layer.The printed label layer is that 40mm, interior ring radius are that 7.5mm is with interior overall optical disk ring shape zone for the outer shroud radius.

The utility model product thickness is thin, can make thickness reduce to 0.54～0.90mm; The utility model product weight is light, and every weight can reduce by 1.65～3.63g, and weight is reduced to 0.45～0.75 times of existing DVD5 read-only optical disc, does not influence actual use, but saves material very much.Simultaneously, help card printing and printing area can be covered to the overall optical panel surface.

Description of drawings

The card distribution schematic diagram of the existing 80mm DVD5 read-only optical disc of Fig. 1.

The cross-sectional view of the existing 80mm DVD5 read-only optical disc of Fig. 2.

The card distribution schematic diagram of Fig. 3 the utility model 80mm thin plane DVD5 read-only optical disc.

First kind of cross-sectional view of Fig. 4 the utility model 80mm thin plane DVD5 read-only optical disc.

Second kind of cross-sectional view of Fig. 5 the utility model 80mm thin plane DVD5 read-only optical disc.

The third cross-sectional view of Fig. 6 the utility model 80mm thin plane DVD5 read-only optical disc.

Embodiment

The utility model is described in further detail below in conjunction with concrete drawings and Examples.

Shown in Fig. 3,4,5,6: read-only optical disc of the present utility model; comprise information substrate 3 and reflection horizon 4 provided thereon, the CD that protective seam 5 constitutes; CD is provided with center pit 10; on CD, be provided with optical disc information district 1 and clamp area 2; optical disc information district 1 and clamp area 2 thickness are 0.54～0.90mm, and the thickness difference of optical disc information district 1 and clamp area 2 less than, equal 0.3mm.

But preferably keep optical disc information district 1 thickness identical, and the upper and lower end face in optical disc information district 1 is all fair with the upper and lower end face of clamp area 2 with clamp area 2 thickness.When being provided with printed label layer 7 like this on protective seam, printed label layer 7 can be that 40mm, interior ring radius are that 7.5mm is with interior overall optical disk ring shape zone for the outer shroud radius.

1, the utility model changes optical disc information district and clamp area into single layer structure by double-decker, and the one side of information substrate 3 is an information faces 8, and another side is a reading face 9.Disk thickness is in 0.54～0.90mm from the 1.2mm attenuate, and keeps the difference in height of optical disc information district's 1 end face and clamp area 2 end faces to be less than or equal to 0.3mm, shown in Fig. 5,6.

2, double-decker is coated with adhesive glue and another supporting substrate CD bonding mode on the reflection horizon, changes into and on the reflection horizon, directly apply protection glue, and on protection glue, the printed label layer is set.

3, CD printed label layer is apart from the radius 40mm of cd centre and the whole circular annular region of CD between the radius 7.5mm.

The utility model is an example with the DVD5 CD, when cd diameter when 120mm is decreased to 80mm, realized removing supporting substrate and normally operation in CD-ROM drive.Since do not change laser read coil path and zone, thereby to CD-ROM drive do not read the dish exert an influence, do not produce capacitance loss yet.

Estimate that a 80mm thin plane DVD5 read-only optical disc can be saved the polycarbonate of 1.65～3.63g.For the turnout of more than 200 hundred million read-only optical discs in the whole world, its potentiality that economize on resources are very huge.

Simultaneously, because block of information and clamp area place are at grade, do not have the printing step, not only guaranteed the feasible of card typography, CD printed label district can cover to the overall optical panel surface simultaneously.Must adjust the fit dimension of CD-ROM drive clamping position and CD during use, satisfy the service requirement of thin plane CD.

Claims

1, a kind of diameter is the thin plane DVD5 read-only optical disc of 80mm; comprise information substrate (3) and reflection horizon (4) provided thereon, the CD that protective seam (5) constitutes; CD is provided with center pit (10); on CD, be provided with optical disc information district (1) and clamp area (2); optical disc information district (1) and clamp area (2) thickness are 0.54～0.90mm, and the difference in height of optical disc information district (1) end face and clamp area (2) end face is less than or equal to 0.3mm.

2, diameter as claimed in claim 1 is the thin plane DVD5 read-only optical disc of 80mm, it is characterized in that: optical disc information district (1) thickness is identical with clamp area (2) thickness, and the upper and lower end face of optical disc information district (1) is all fair with the upper and lower end face of clamp area (2).

3, diameter as claimed in claim 1 is the thin plane DVD5 read-only optical disc of 80mm, it is characterized in that: be provided with printed label layer (7) on protective seam.

4, diameter as claimed in claim 1 is the thin plane DVD5 read-only optical disc of 80mm, it is characterized in that: printed label layer (7) is that 40mm, interior ring radius are that 7.5mm is with interior overall optical disk ring shape zone for the outer shroud radius.