WO2001073777A1

WO2001073777A1 - A super digital versatile disk and its manufacturing method and die

Info

Publication number: WO2001073777A1
Application number: PCT/CN2000/000062
Authority: WO
Inventors: Faiman Xiu
Original assignee: Goldsense Laser Av Production Limited
Priority date: 2000-03-27
Filing date: 2000-03-27
Publication date: 2001-10-04
Also published as: HK1028704A2; AU2000236534A1

Abstract

A digital versatile disk includes a central hole (1), a clmaping area (2) and a data recording area (3) which are concentric with the central hole (1), the digital versatile disk is characterized in that the clamping area (2) and the data recording area (3) are formed on the same single substrate, and the substrate thickness at the clamping area (2) is larger than that at the data recording area (3).

Description

Super digital universal disc, manufacturing method and manufacturing mold thereof

The present invention relates to an optical disc recording medium, a manufacturing method and a manufacturing mold thereof, and particularly to a super digital versatile disc compatible with a digital versatile disc, a manufacturing method thereof, and a manufacturing mold. Background technique

The optical disc is mainly used for storing sound, video and data. Generally, it has a circular size and an outer diameter of 120 mm or 80 mm. There are two main types of optical discs, namely CD discs (small discs) and DVD discs (digital versatile discs).

According to various functions and recording formats, CDs can be divided into CD-DA, CD-I. CD- Photo. CD-G, CD-ROM. CD-ROM XA, VCD, CD-R, CD-RW and other formats .

DVD can be divided into DVD-Video (Video DVD), DVD-Audio (Audio DVD). DVD-ROM, DVD-R, DVD-RW. DVD-RAM and other formats.

DVDs look very similar to regular CDs, with a diameter of 120mm and a thickness of 1.2mm. The information storage capacity of a DVD can reach seven to thirteen times that of a CD. Taking a single-sided single-layer DVD as an example, its data storage capacity reaches 4.7GB, which is more than seven times that of a CD. When used in home theater, a single-layer DVD can store at least two hours and fifteen minutes of video images, and has high-definition image quality (horizontal resolution up to 500 lines) and high-fidelity music and interactive multimedia. performance. The DVD also comes with Dolby Digital (AC-3) surround sound and eight independent channels. When applied to audio products, single-sided single-layer DVDs can store six to seven CD players' music content, while providing up to 96 kHz sampling frequency and 24-bit analog-to-digital conversion capability. Because DVD has a higher storage capacity, when used to store game programs, game programs can have more unexpected designs, have a stronger sense of reality, and have more autonomy. Naturally, the game program is more entertaining. The read-only storage mode of DVD can completely replace the existing CD. Since the capacity of a single-sided single-layer DVD is seven times that of a CD-ROM, only one DVD-ROM can store the contents of a reference book, including images, sounds, and video clips.

Any kind of data information can be stored on DVD, which means that DVD has broad development prospects in multimedia applications. For example, cable and wireless television can use DVDs for more effective programming. Video on Demand (VOD) is an ideal DVD application because DVD images do not need to be rewinded and can be searched automatically. Card-to-OK DVD is another application and has a huge market. In addition, DVDs can be used in the publishing industry. Other possible applications include video and audio recording to replace tapes in various systems.

In order to make the DVD have a large capacity under the premise of maintaining the appearance similar to that of the CD, the pits (or pits, pits) of the DVD are designed to be only half of the CD pits, that is, 0.4 micrometers. It is also half the CD track separation distance, which is 0.74 microns. In order for the optical head to focus properly on such small pits, DVDs use thinner polycarbonate (PC) substrates than CDs. However, if a DVD is manufactured using only a single sheet of such a thin substrate, the DVD will be too thin to be held smoothly on its own and cannot be played in a conventional DVD player. Conventional DVP players require that the DVD film being played must have a minimum thickness of about 1.2 mm. Therefore, when manufacturing a conventional DVD, a bonding technique is used to bond two 0.6 mm thick substrates together to form a 1.2 mm thick DVD. In a single-sided single-layer DVD, no data is recorded on one of the substrates. Obviously, the production process of the conventional DVD not only wastes the raw material of the substrate, but also increases the production cost unnecessarily because of the need for expensive bonding machines and a large amount of adhesive. In addition, the bonding process not only prolongs production time, but also reduces DVD yield. Summary of the Invention

A first object of the present invention is to provide a digital universal disc with a new structure. It is referred to herein as the Super Digital Versatile Disc (SDVD). Super DVD has a data format compatible with conventional DVDs, so it can be played in conventional DVD players, but its manufacturing process is relatively simple and raw materials are saved.

A second object of the present invention is to provide a method for manufacturing the above-mentioned super digital versatile disc.

A third object of the present invention is to provide a mold for manufacturing the above-mentioned super digital versatile disc.

To achieve the first object, the present invention provides a digital universal disk, which includes a center hole, a pressure plate area and a data recording area concentric with the center hole, and is characterized by:

The platen area and the data recording area are formed on the same single substrate. The thickness of the substrate at the platen area is greater than the thickness of the substrate at the data recording area.

To achieve the above second object, the present invention provides a method for manufacturing a digital versatile disc, which is characterized by including the following steps:

A substrate is injection-molded, and a platen area around the central hole and a data recording area around the platen are formed on the substrate, wherein the thickness of the substrate at the platen area is greater than the thickness of the substrate at the data recording area.

In order to achieve the third object, the present invention provides a mold for manufacturing a digital versatile disc, including:

The first mold base and the second mold base that can move toward each other, the first mold base end surface and the second mold base end face each other, and a substrate forming space is formed between the first mold base end surface and the second mold base end surface;

A fluid injection hole provided on the end surface of the first die base, through which fluid can be injected into the substrate molding space; and

The second mold base includes:

A central hub, whose end surface is exposed to the end surface of the second mold base, and then to the substrate molding space, and faces the fluid injection hole, and

A stamped part sleeved in the central hub can be moved relative to the end face of the second die seat to enter or leave the substrate forming space; The mold is characterized by:

The end face of the central hub is recessed for a first predetermined distance from the end of the second die seat toward the inside of the second die seat.

The super DVD according to the present invention is compatible with a conventional DVD, and can be normally played in a conventional DVD player, but saves about half of the raw material as compared with a conventional DVD.

According to the manufacturing method of the super DVD according to the present invention, there is no need to equip an expensive automatic bonding machine, and the investment is greatly saved. Overview of the drawings

The above and other features and advantages of the present invention will be more apparent through a detailed description of the best embodiment of the present invention in conjunction with the accompanying drawings.

1 is a top view of a first embodiment of a super DVD of the present invention; FIG. 2 is a cross-sectional view of the super DVD shown in FIG. 1;

3 is a top view of a second embodiment of a super DVD of the present invention; FIG. 4 is a cross-sectional view of the super DVD shown in FIG. 3;

Fig. 5 is a schematic diagram of a super DVD manufacturing mold of the present invention. Best Mode of the Invention

The preferred embodiments of the present invention are described in detail below.

FIG. 1 is a top view of a first embodiment of a super DVD of the present invention, which is the same as that of a conventional DVD. Reference number 1 is the center hole. Reference numeral 2 is a platen. When a Super DVD is loaded into a conventional DVD player, the corresponding platen (not shown) in the player will fix the Super DVD at the platen 2, so that the Super DVD is in the motor. Driven by (not shown), the center hole 1 is used as the axis to rotate rapidly. Reference numeral 3 is a data recording area, and is used to store sound, video, and data according to different uses and according to a corresponding recording format. The recording format of the data recording area 3 can conform to any specifications of the DVD recording format in the prior art, thereby making the Super DVD compatible with the conventional DVD so that it can be played normally in a conventional DVD player. Of course, the recording format of the data recording area 3 in the Super DVD can also conform to any other specifications of the recording format of the disc in question that may appear in the future. The different recording formats adopted by the data recording area 3 do not constitute a limitation on the present invention.

The diameter of the center hole 1 is generally 15 mm, the outer diameter of the platen area 2 is generally 33.5 mm, and the outer diameter of the data recording area 3 is generally 48 mm to 120 mm. Typically, the outer diameter of the data recording area 3 may be 80 mm or 120 mm, so that it can be played in a conventional DVD player. The various sizes given here are just to give Super DVDs a form factor similar to conventional DVDs for playback in conventional DVD players. These dimensions do not constitute a limitation on the actual size of the center hole 1, platen area 2 and data recording area 3.

FIG. 2 is a cross-sectional view of the super DVD shown in FIG. 1. FIG. As shown in FIG. 2, the embossing area 2 and the data recording area 3 of the super DVD are formed on the same single-chip substrate, as shown by the diagonal lines in the figure. The material constituting the substrate may be any suitable material in the prior art, for example, it may be polycarbonate (PC) used for manufacturing a conventional CD or DVD.

The thickness of the platen area 2 is in the range of 0.6 mm to 1.5 mm, and the thickness of the data recording area 3 is approximately 0.6 mm. On the upper surface of the substrate portion used as the data recording area 3, pits representing data are pressed in a manner conforming to the various specifications described above, and the substrate portion between two adjacent pits is called a stage. Then, the upper surface of the substrate is plated with a metal film to reflect the laser beam for reading by the optical head. Various specifications related to recording data and the working method of the optical head are well known to those skilled in the art and will not be described in detail.

The above-mentioned novel structure can be used in various DVDs. For example, when manufacturing DVD-R, the surface of the substrate used as the data recording area 3 may be coated with a layer of a photosensitive material, such as a dye layer, and then the area where the data is recorded is irradiated with ultraviolet light to harden the dye. . Finally, a metal layer is plated on the photosensitive material layer to reflect the laser beam incident on the photosensitive material layer through the substrate. With this method, a DVD-R with a novel structure, that is, a Super DVD-R (SDVD-R) can be produced. In addition, a multi-target metal plasma sputtering can be used to form a substrate on the surface of the substrate used as the data recording area 3. A composite material layer including a plurality of thin layers of different metal materials is used as a photosensitive material layer. By this method, a DVD-RW with a novel structure, that is, a Super DVD-RW (SDVD-RW) can be produced.

The super DVD shown in Figs. 1 and 2 has a circular shape, which is the most general case. According to different usage purposes and needs, the super DVD of the present invention can adopt other different shapes, such as rectangle, square, oval, heart, triangle, etc., or any other irregular shape. This super DVD can be used for various purposes, such as DVD business cards, DVD security cards, DVD calendars, DVD promotional materials, DVD greeting cards, DVD product catalogs, and so on.

Fig. 3 is a top view of a second embodiment of a super DVD of the present invention, showing a super DVD having a rectangular shape. Reference numeral 1 is a central hole, reference numeral 2 is a pressure plate area, and reference numeral 3 is a data recording area. They are the same as the corresponding components in FIG. 1 and FIG. 2 and will not be described again. It differs from FIG. 1 only in that reference numeral 4 is an external area.

Various patterns or characters can be produced on the data recording area 3 and the outer area 4 shown in each figure (in the present invention, characters are treated as patterns). The patterns and figures made on the data recording area 3 or the outer area 4 can be used for decoration or explanation purposes. When the Super DVD shown in FIG. 3 is used as a DVD business card, a plurality of contents such as the name, title, job title, work unit, telephone, and company profile of the business card holder can be made on the data recording area 3 and / or the external area 4.

The pattern can be made on the outer area 4 by any method available in the prior art, such as printing, engraving, etc.

Making a pattern on the data recording area 3 requires a novel method provided by the present invention. As described above, a large number of pits representing the data are suppressed in the data recording area 3, and a table is formed between adjacent pits. Therefore, a part of the pits and / or mesas can be selected from a large number of pits and mesas according to the pattern made, and without affecting the represented data, their shapes are slightly changed to make them have special shapes. These special shaped pits and / or tables are combined macroscopically to form a pattern.

Various methods can be used to make some of the pits and / or tables have special shapes. E.g, The pattern can be made on the die together with the data in advance, and then the die is pressed onto the substrate during the injection molding of the substrate. It is also possible to record the pits and / or tables that need to be reshaped one by one after the data is pressed onto the substrate by conventional methods.

In order for the Super DVD shown in FIG. 3 to be played in a conventional DVD player, the distance between any point on the outer edge of the outer area 4 and the center of the center hole 1 must be less than or equal to ⁶⁰ mm. The outer edge of the outer region 4 may constitute a regular shape (eg, a circle, a rectangle, a square, an oval, a triangle, etc.) or any irregular shape. In the super DVD shown in FIG. 3, due to the existence of the outer area 4, the outer diameter of the data recording area 3 is generally smaller than the outer diameter of the data recording area 3 in the super DVD shown in FIG. 1, but the minimum is 48 mm.

FIG. 4 is a cross-sectional view of the super DVD shown in FIG. 3. As shown in FIG. 4, the press disk area 1, the data recording area 3, and the external area 4 of the super DVD are formed on the same single-chip substrate, as shown by oblique lines in the figure. Unlike Figure 2, the external area 4 is added. The outer area 4 may have the same thickness as the data recording area 3.

When the super DVD shown in FIGS. 3 and 4 is irregularly shaped, in order to be able to play the irregularly shaped super DVD normally in a conventional DVD player, it needs to be on the lower surface of the disc in contact with the player tray, at a distance from the center At the center of the hole 1 at about 40 mm, a fixing device is provided, as shown by reference numeral 5. The fixing device may be at least two protrusions formed on the substrate, or at least two rubber edges adhered to the substrate, or a ring concentric with the center hole 1.

Conventional DVD players have the ability to read small discs with an outer diameter of 80 mm, because the disc player's tray has a specific recessed track at a diameter of 80 mm. When the super DVD provided with the fixing device 5 shown in FIG. 4 is mounted on a tray of a conventional DVD player, the fixing device 5 will be engaged into a recessed track with a diameter of 80 mm in the tray. Thus, even if a super DVD has an irregular shape, it can be stably rotated by a motor in a DVD player.

Due to the choice of the size of the data recording area 3 and the external area 4, the fixing device 5 can The lower surface of the substrate located at the data recording area 3, or the lower surface of the substrate located at the outer area 4, or the lower surface of the substrate located at the boundary between the data recording area 3 and the outer area 4. The relative position of the fixing device 5 with the data recording area 3 and the external area 4 does not constitute a limitation on the present invention.

The manufacturing method of the super DVD shown in FIGS. 1 to 4 is described in detail below.

The most basic method involves such a step: injection molding a substrate, forming a platen area 2 around the center hole 1 and a data recording area 3 around the platen area 2 on the substrate, wherein the thickness of the substrate at the platen area 2 Greater than the thickness of the substrate at the data recording area 3.

In the best mode of the present invention, in the above-mentioned step of injection molding the substrate, the substrate thickness at the platen area 2 is greater than 0.6 mm and less than or equal to 1.5 mm, so that the substrate thickness at the data recording area 3 is 3 Approximately 0.6 mm.

In order to be able to play the super DVD of the present invention in a conventional DVD player, the above method forms the outer diameter of the data recording area 3 in the range of 48 mm to 120 mm.

The above methods can be used to make various DVDs, such as read-only DVDs, DVD-R, DVD-RW, DVD-RAM, and so on.

In one method, in the process of injection molding a substrate, for example, using a die, a large number of pits and tables are pressed on the data recording area 3 to represent the recorded data;

A metal layer is plated on the plurality of pits and mesa for reflecting the laser beam incident on the plurality of pits and mesa through the substrate.

With this method, various patterns can be made on the data recording area 3. For this reason, among a large number of pits and tables, a part of the pits and / or tables is selected according to the produced pattern, and their shapes are slightly changed without affecting the represented data, that is, to make them have a special shape, thereby macroscopically , These pits and / or tables with special shapes are combined to make a pattern. As described above, such a pattern may be made in advance on a die.

In another method, a layer of a photosensitive material, such as a dye layer, is applied on the data recording area 3. Then, the portion representing the data is irradiated with ultraviolet light to harden the irradiated portion. Finally, a metal layer is plated on the dye layer for reflecting through the substrate A laser beam incident on the dye layer. This method is used to make Super DVD-R.

In another method, a multi-target metal plasma sputtering is performed on the data recording area 3 to form a composite material layer including a plurality of thin layers of different metal materials. The part of the composite material layer irradiated with the laser beam will undergo a phase change, which will change the light transmission characteristics. This method is used to make Super DVD-RW.

In the various methods described above, the external area 4 may be formed outside the data recording area 3. The platen area 2, the data recording area 3, and the external area 4 may be formed on the same single-chip substrate.

In order to be able to play a super DVD produced as above in a conventional DVD player, the outer area 4 must be formed such that the distance between any point on the outer edge thereof and the center of the center hole 1 is less than or equal to 60 mm.

According to different needs, the outer edges of the formed outer region 4 may form a circle, a square, a rectangle, etc., or form an irregular figure.

In order for the super DVD thus manufactured to rotate stably in a conventional DVD player, it is also necessary to provide a fixing device on the lower surface of the Super DVD for contact with the player tray at a distance of about 40 mm from the center of the circle of the center hole 1 . The fixing device provided is at least two protrusions, two rubber edges or a ring concentric with the center hole 1.

Fig. 5 is a schematic view of a mold used when manufacturing a super DVD of the present invention. The mold includes: a first mold base 501 and a second mold base 502 that can move toward each other. The first mold base end surface and the second mold base end surface face each other, and a substrate forming space 508 is formed between the first mold base end surface and the second mold base end surface.

A fluid injection hole 503 is formed on the end surface of the first die base. When injection molding a substrate of a super DVD, a fluid for forming a substrate may be injected into the substrate molding space 508 from the inside of the first mold base 501 through a fluid injection hole 503. Such a fluid may be, for example, a melted polycarbonate.

The second mold base 502 includes:

A central hub 504 whose end surface is exposed to the end surface of the second mold base, and further exposed to the substrate molding space 508, and faces the fluid injection hole 503; and A stamped part 505 sleeved in the central hub 504 can be moved relative to the end surface of the second die seat so as to enter or leave the substrate forming space 508. The function of the stamping part 505 is that after the super DVD is injection-molded in the substrate molding space 508, it rapidly impacts on the end surface of the second mold base, thereby impacting the super DVD disc adsorbed on the end surface of the second mold base with a diameter of 15 mm center hole.

In actual operation, the first mold base 501 can be fixed, and the second mold base can be moved closer to or away from the first mold base as required.

As shown in the figure, the end surface of the central hub 504 is recessed from the second die base end toward the inside of the second die base 502 for a first predetermined distance.

When injection molding a Super DVD, a die 507 with a central hole (its diameter is generally about 33.5 mm) is vacuum-adsorbed on the end face of the second die base. The central hole of the die 507 exposes the end face of the central hub 504 to the base. Sheet forming space 508.

In addition, a limiting device 506 may be provided on the first mold base 501 for moving the second mold base 502 close to the first mold base 501 to restrict the movement of the second mold base 502 so as to be at the end surface of the first mold base. A second predetermined distance is maintained from the die 507. The second predetermined distance is about 0.6 mm. The sum of the first predetermined distance and the thickness of the die 507 is in the range of 0 mm to 0.9 mm.

In the process of manufacturing the super DVD of the present invention, the mold shown in Fig. 5 is used as such. First, the die piece 507 is vacuum-sucked onto the end face of the second die holder, so that the center hole of the die piece 507 exactly matches the end face of the central hub. Then, the second mold base 502 moves toward the first mold base 501 until it comes into contact with the limiting device 506. Thereafter, the molten polycarbonate is injected into the substrate molding space 508 from the fluid injection hole 503. The formed substrate is cooled by a water cooling method. Thereafter, the second mold base 502 leaves the first mold base 501. At this time, the molded substrate 507 is adhered to the molded substrate. The impact member 505 rapidly impacts outside the end face of the second die seat, thereby striking the center hole on the substrate. Finally, the robot removes the substrate from the second mold base for subsequent processing.

Although the best embodiment of the present invention has been described in detail above with reference to the accompanying drawings, for those skilled in the art, various modifications and changes can be made. Without departing from the scope and spirit of the invention. Accordingly, the scope of the invention is limited only by the claims.

Claims

Rights request

1. A digital universal disk comprising a center hole (1), a pressure plate area (2) and a data recording area (3) concentric with the center hole (1), which are characterized by:

The platen area (2) and the data recording area (3) are formed on the same single substrate, and the substrate thickness at the platen area (2) is greater than the substrate thickness at the data recording area (3).

2. A digital versatile disc according to claim 1, characterized in that the thickness of the substrate at the platen area (2) is greater than 0.6 mm and less than or equal to 1.5 mm.

3. A digital versatile disc according to claim 2, characterized in that the thickness of the substrate at the data recording area (3) is approximately 0.6 mm.

4. A digital versatile disc according to claim 3, characterized in that the outer diameter of the data recording area (3) is in a range of 48 mm to 120 mm.

5. A digital versatile disc according to claim 3, characterized in that the data recording area (3) comprises:

A large number of pits and tables pressed on the substrate to represent the recorded data; a metal layer plated on the plurality of pits and tables to reflect the laser light incident on the plurality of pits and tables through the substrate; beam.

6. The digital versatile disc according to claim 5, characterized in that a part of the plurality of pits and the pits and / or the pits have a special shape without affecting the represented data, and the pits with the special shape and / Or set into a pattern.

7. A digital versatile disc according to claim 3, characterized in that the data recording area (3) comprises:

A layer of photosensitive material coated on a substrate;

A metal layer plated on the photosensitive material layer is used to reflect a laser beam incident on the photosensitive material layer through a substrate.

8. The digital versatile disc according to claim 7, characterized in that the photosensitive material layer is a dye layer, and several parts of the dye layer are hardened by irradiation with ultraviolet light to represent the recorded data.

The digital universal disc according to claim 7, characterized in that the photosensitive material layer is a composite material layer including a plurality of thin layers of different metal materials, and a part of the portion irradiated by the laser beam undergoes a phase change to change the light transmission characteristic.

10. A digital versatile disc according to any one of claims 1 to 9, characterized in that said digital versatile disc further comprises an external area (4) which completely accommodates a data recording area (3).

A digital versatile disk according to claim 10, characterized in that the outer area (4) is formed on the same single-chip substrate constituting the platen area (2) and the data recording area (3).

12. A digital versatile disc according to claim 11, characterized in that the distance between any point on the outer edge of the outer area (4) and the center of the circle of the central hole (1) is less than or equal to 60 mm.

13. A digital versatile disc according to claim 12, characterized in that the outer edge of the outer area (4) forms a circle.

14. A digital versatile disc according to claim 12, characterized in that the outer edge of the outer area (4) forms a rectangle.

15. A digital versatile disc according to claim 12, characterized in that the outer edge of the outer area (4) constitutes an irregular pattern.

16. The digital versatile disc according to any one of claims 12 to 15, characterized in that the digital versatile disc is on the lower surface in contact with the player tray at a distance of about 40 mm from the center of the circle of the center hole (1), With fixing device.

17. A digital versatile disc according to claim 16, wherein the fixing means is at least two protrusions.

18. A digital versatile disc according to claim 16, wherein the fixing means is at least two rubber edges.

A digital universal disc according to claim 16, characterized in that the fixing means is a ring concentric with the central hole (1).

20. A method for manufacturing a digital universal disk, comprising the following steps: injection molding a substrate, and forming a platen area (2) surrounding the center hole (1) and a platen area (2) surrounding the platen on the substrate. Data recording area (3), where the thickness of the substrate at the platen area (2) is large The thickness of the substrate at the data recording area (3).

21. The method according to claim 20, characterized in that in the step of injection-molding the substrate, the thickness of the substrate at the platen area (2) is greater than 0.6 mm and less than or equal to 1.5 mm.

22. A method according to claim 21, characterized in that the thickness of the substrate at the formed data recording area (3) is about 0.6 mm.

23. A method according to claim 22, characterized in that the outer diameter of the data recording area (3) formed is in the range of 48 mm to 120 mm.

24. The method according to claim 23, further comprising the steps of: pressing a plurality of pits and tables on the data recording area (3) to represent the recorded data; plating a plurality of pits and tables with a metal A layer for reflecting a laser beam incident on the plurality of pits and mesa through a substrate.

25. The method according to claim 24, characterized in that a part of the pits and / or mesas among the plurality of pits and mesas have a special shape without affecting the represented data, and the combination of pits and / or mesas having the special shape Into a pattern.

26. The method according to claim 23, further comprising the step of: applying a layer of a photosensitive material on the substrate;

A metal layer is plated on the photosensitive material layer for reflecting a laser beam incident on the photosensitive material layer through a substrate.

27. The method according to claim 26, characterized in that the applied photosensitive material layer is a dye layer, and the irradiated parts are hardened with ultraviolet light irradiation at a plurality of parts to represent the recorded data.

28. The method according to claim 26, characterized in that the applied photosensitive material layer is a composite material layer, which is formed by multi-target metal plasma sputtering, and includes a plurality of thin layers of different metal materials.

The method according to any one of claims 20 to 28, further comprising the step of forming an external area (4) outside the data recording area (3).

30. A method according to claim 29, characterized in that the platen area (2) and An external area (4) is formed on the same single substrate of the data recording area (3).

31. The method according to claim 30, characterized in that the distance between any point on the outer edge of the formed outer region (4) and the center of the center hole (1) is less than or equal to 60 mm.

32. The method according to claim 31, characterized in that the outer edges of the outer region (4) formed form a circle.

33. The method according to claim 31, characterized in that the outer edges of the outer region (4) formed form a rectangle.

34. A method according to claim 31, characterized in that the outer edges of the outer region (4) formed form an irregular pattern.

35. The method according to any one of claims 31 to 34, further comprising on the lower surface of the digital universal disc in contact with the player tray, at a distance of about 40 mm from the center of the circle of the center hole (1), Steps for setting fixtures.

36. A method according to claim 35, characterized in that the fixing means provided are at least two protrusions.

37. The method according to claim 35, characterized in that the fixing means provided are at least two rubber edges.

38. The method according to claim 35, characterized in that the fixing means provided is a ring concentric with the central hole (1).

39. A mold for manufacturing a digital universal disc, comprising:

The second mold base includes:

A central hub, whose end surface is exposed to the end surface of the second mold base, and then to the substrate molding space, and faces the fluid injection hole, and A stamped part sleeved in the central hub can be moved relative to the end face of the second die seat to enter or leave the substrate forming space;

The mold is characterized by:

40. The mold according to claim 39, wherein the first mold base is stationary, and the second mold base is movable toward or away from the first mold base.

41. The mold according to claim 39, characterized in that a die with a central hole can be vacuum-adsorbed on the end face of the second die base, and the central hole of the die exposes the end surface of the central hub to the substrate forming space.

42. The mold according to claim 41, characterized in that the first mold base is provided with a limiting device for restricting the movement of the second mold base when the second mold base moves close to the first mold base so that the A second predetermined distance is maintained between the end surface of the die seat and the die sheet.

43. The mold according to claim 42, wherein the second predetermined distance is about 0.6 mm.

44. The mold according to any one of claims 41 to 43, characterized in that the sum of the first predetermined distance and the thickness of the die is in the range of 0 mm to 0.9 mm.