CN2054931U - Laser disc with ring shape set-off - Google Patents
Laser disc with ring shape set-off Download PDFInfo
- Publication number
- CN2054931U CN2054931U CN89213609U CN89213609U CN2054931U CN 2054931 U CN2054931 U CN 2054931U CN 89213609 U CN89213609 U CN 89213609U CN 89213609 U CN89213609 U CN 89213609U CN 2054931 U CN2054931 U CN 2054931U
- Authority
- CN
- China
- Prior art keywords
- signal
- disc
- record
- substrate
- disc record
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000758 substrate Substances 0.000 claims description 36
- 125000004122 cyclic group Chemical group 0.000 claims description 15
- 125000006850 spacer group Chemical group 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229920005668 polycarbonate resin Polymers 0.000 description 4
- 239000004431 polycarbonate resin Substances 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
- G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
-
- 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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
A laser disc with ring-shaped bulges is characterized in that surfaces or back faces between record signals are provided with ring-shaped bulges integral with disc base plates in given size. Functions of the ring-shaped bulges are to prevent disc base plates contacting when discs are stacked up, and therefore, to avoid using common disc spacer rings.
Description
The utility model relates to the optical recording disc record that utilizes optical technology recording playback digital signal, and promptly so-called compact disc, its particular content are that a kind of compact disc that a cyclic lug divides that forms on the disc record substrate middle part surface or the back side is provided.
Prior art
Compact disc generally is a kind of noncontact recording disc record that utilizes laser technology, is promptly forming numerous width 0.5 μ m, the degree of depth 0.1 μ m, the groove of length between 0.9～3.3 μ m on the polycarbonate resin, the record digital signal; When playback, with laser radiation on the disc record groove of high speed rotating, the light signal that reflects with reproduction.
The compact disc of this working method in order to make laser beam optically focused in a tiny area, and keeps its focus, requires phonograph to run to terminal point in the error range of ± 0.1 μ m always, thereby need adopt high-precision topworks.In order to address that need, the requirement to the assurance precision in the manufacturing of compact disc is very high.
Now now be summarized as follows with the process for making of compact disc with above-mentioned.
After at first a glass disk surface fully being polished, it is made a master that is writing down the digital signal that is made of above-mentioned groove according to digital main tape.
Next step is, duplicates several the recording discs with same signal according to this master and makes moulds, makes disc record substrate, a mould many disc record substrates that can be shaped with this molding again.
Use this moment polycarbonate resin to produce the disc record substrate; above-mentioned disc record substrate surface spraying aluminum-alloy reflective film,, also to answer layer of transparent varnish diaphragm with the splash method for the groove surfaces of the multiple layer of boundary belt; and then labelled, so just complete compact disc.
In above-mentioned a series of production processes, the problem maximum be the disc record substrate that is shaped by polycarbonate resin to be carried out the process of the multiple layer of splash.
That is to say, before implementing splash, pile up several disc record substrates to be placed on the material stock platform and move, but in this process, scratch the disc record substrate easily, and man-hours requirement is also long.
Be described in detail as follows with Fig. 4 again.On the real estate of used disc record substrate D without any outshot, thereby, when piling up, substrate surface is in contact with one another, the tendency of being got up by pressing is arranged greatly, therefore, when on the column of material stock platform ST, inserting the disc record substrate, every disc record substrate must be inserted on the column with a teflon spacer ring S, this is to be in contact with one another and the damage signal record surface between the real estate in order to prevent, and in order to provide convenience to next process, take off one by one easily for making the disc record substrate, keep certain interval W and make between dish and the dish.
The purpose of utility model
There are more following problems in above-mentioned prior art.Owing to use spacer ring, thus when the disc record substrate being inserted on column or it being taken off, also each spacer ring must be inserted simultaneously or takes off, thereby prolonged production man-hour, may realize robotization hardly.In addition, sometimes also can be because of the defectiveness of spacer ring own has damaged signal recording surface or its back side, therefore, situations such as the damaged or bad order of information often appear.Also have a problem to be, spacer ring system is made by teflon, and every use once all must be cleaned and dry, and the treatment facility of spacer ring also often breaks down.
Solve the means that problem adopted
The utility model is a kind of countermeasure of taking in order to solve above-mentioned various existing problem, be that the mould that antiphonal singing disc board injection molded is used improves, size by defined on the disc record substrate body forms a cyclic lug branch of forming an integral body with substrate, plays a part above-mentioned spacer ring.
In the production of compact disc, on the disc record substrate that is shaped by polycarbonate resin, carrying out in the operation of splash, the result who adopts above-mentioned cyclic lug to assign to replace spacer ring shows, those problems that exist when in the past using spacer ring have been solved, and make operation obtain simplifying, reached the purpose of enhancing productivity.
By the method that adopts usually, with marking press shaping several disc record substrate 11a, 11b, the above-mentioned the sort of cyclic lug that all is shaped on every substrate divides 19a, 19b, as these several substrates all being piled up on the column P of material stock platform ST, so, an initial substrate 11a divides 19a by above-mentioned cyclic lug, make between the T of it and material stock platform ST surface and keep a predetermined gap W, and second disc record substrate 11b also divides 19b by above-mentioned cyclic lug, make it with first disc record substrate 11a upper surface between predetermined gap W of maintenance.
Like this, when leaving in the disc record substrate 11 that the utility model proposes on the material stock platform ST shown in Figure 3, divide 19 by a cyclic lug of forming an integral body with substrate, make the surface contact can not take place between each substrate, and keeping a predetermined gap W, therefore, do not need to use in the past the sort of spacer ring.
Cyclic lug divide 19 be on the surface 18 in non-the signal record interval 14 or back side 18 ' on formation, contact with the signal record interval 17 of other disc record substrate piling up Shi Buhui, so phenomenon such as the damaged or bad order of signal can not take place.
This cyclic lug divides 19 height, preferably greater than producing the required minimum clearance of vacuum suction between the disc record substrate.Use is the result show, cyclic lug divides 19 height, equals the selection that 0.2mm is the best to guarantee above-mentioned gap W.
Embodiment
With reference to accompanying drawing embodiment is described as follows.Fig. 1 and Fig. 2 represent, at a center pit 12 with the interval 14(of non-signal record from disc record substrate 11, till beginning part 13 to signal) and the interval 17(of signal record begin part 13 beginnings from the signal that forms a large amount of digital signal grooves 15, till signal ended part 16) common laser disc record 10 on, begin to signal on the surface 18 in the non-signal record interval 14 between the part 13 beginning from above-mentioned center pit 12, size forms a cyclic lug of forming an integral body with above-mentioned disc record substrate 11 and divides 19 in accordance with regulations.
Above-mentioned cyclic lug divides 19 diameter, can be in non-signal record interval 14, selection arbitrarily on the surface 18; Also can be in non-signal record interval 14, the back side 18 ' on the above-mentioned cyclic lug branch of formation.
Like this, in the production run of above-mentioned compact disc 10, when piling up a few Zhang Shangshu disc record substrate 11, can cancel preventing that the disc record surface is in contact with one another the spacer ring S of usefulness.
The effect that utility model is obtained
As mentioned above, production process by compact disc that the utility model is carried, several disc record substrates are piled up after on the material stock platform, when down getting one by one again, do not need to use the spacer ring of the sort of special use, thereby operation sequence is further simplified, production hour shortens significantly, production efficiency is improved etc. significantly, be expected to obtain bigger result of use.
Brief description of drawings
Fig. 1 is carried the compact disc oblique view by this case; Fig. 2 is carried compact disc major part amplification profile diagram by this case; Fig. 3 carries the state that piles up of disc record substrate for this case; Fig. 4 piles up state for disc record substrate in the past.
The explanation of main symbol in the accompanying drawing
10-compact disc 11-disc record substrate
12-center pit 13-signal begins part
The interval 15-groove of the non-signal record of 14-
16-signal ended part 17-signal record interval
18-surface 18 '-back side
19-cyclic lug branch
Claims (1)
- Compact disc with non-signal record interval (14) (begin to signal to begin part (13) from disc record substrate center hole (12) till) and signal record interval (17) (beginning part (13) from the signal that forms numerous digital signal groove (15) begins to signal ended partly till (16)), it is characterized in that, on the surface (18) or its back side (18 ') in its non-signal record interval (14), size forms one and is whole cyclic lug branch (19) with disc record substrate (11) in accordance with regulations, constitutes a kind of compact disc that has the cyclic lug branch.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KK11170 | 1988-07-09 | ||
| KR880011170 | 1988-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2054931U true CN2054931U (en) | 1990-03-21 |
Family
ID=31492730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89213609U Expired - Lifetime CN2054931U (en) | 1988-07-09 | 1989-07-05 | Laser disc with ring shape set-off |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0212770U (en) |
| CN (1) | CN2054931U (en) |
| DE (1) | DE8815125U1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5060292U (en) * | 1973-10-01 | 1975-06-03 | ||
| US5453975A (en) * | 1991-12-16 | 1995-09-26 | Sharp Kabushiki Kaisha | Optical disc with surface coating and manufacturing method therefor |
| JP2768862B2 (en) * | 1991-12-16 | 1998-06-25 | シャープ株式会社 | Optical disc and surface treatment method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5344724Y2 (en) * | 1973-06-18 | 1978-10-26 | ||
| JPS5720123A (en) * | 1980-07-10 | 1982-02-02 | Meidensha Electric Mfg Co Ltd | Distance relay |
-
1988
- 1988-12-05 DE DE8815125U patent/DE8815125U1/en not_active Expired
-
1989
- 1989-01-13 JP JP1989003455U patent/JPH0212770U/ja active Pending
- 1989-07-05 CN CN89213609U patent/CN2054931U/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE8815125U1 (en) | 1989-01-19 |
| JPH0212770U (en) | 1990-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |