CN2434765Y - Super Digital Universal Disk - Google Patents

Abstract

A digital universal disk comprises a central hole (1), a disk pressing area (2) and a data recording area (3) which are concentric with the central hole (1), and is characterized in that the disk pressing area (2) and the data recording area (3) are formed on the same single-piece substrate, and the thickness of the substrate at the disk pressing area (2) is larger than that of the substrate at the data recording area (3).

Description

Super Digital Universal Disk

The utility model relates to an optical disc recording medium and a manufacturing mold thereof, in particular to a super digital universal disc compatible with a digital universal disc and a manufacturing mold thereof.

Optical discs are mainly used to store audio, video and data, and generally only have a circular size with an outer diameter of 120 mm or 80 mm. There are two main types of optical discs, CDs (Compact Disc) and DVDs (Digital Versatile Disc).

According to various functions and recording formats, CD 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 are very similar in appearance to ordinary CDs, with a diameter of 120 mm and a thickness of 1.2 mm. The information storage capacity of DVD can reach seven to thirteen times that of CD. Taking a single-sided single-layer DVD as an example, its data storage capacity reaches 4.7GB, which is more than seven times the storage capacity of a CD. When applied to a 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 capabilities. performance. At the same time DVD with Dolby Digital (AC-3) surround sound and eight independent channels. When applied to audio products, a single-sided single-layer DVD can store the music content of six to seven CDs, while providing up to 96 kHz sampling frequency and 24-bit analog-to-digital conversion capability. Because the DVD has a higher storage capacity, when used to store game programs, the game programs can have more unexpected designs, have a stronger sense of reality and more natural scenes, making the game programs 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 over-the-air 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 rewound and can be automatically searched. Snap-to-OK DVDs are another application and have a huge market. In addition, DVD can also be applied to the publishing industry. Other possible application areas include video and audio recording as a replacement for magnetic tape in various systems.

In order to make DVD have a larger capacity under the premise of maintaining a similar appearance to CD, the pit (or pit pattern, pit) of DVD is designed to be only half of the pit of CD, that is, 0.4 microns, and the track spacing distance of DVD Also half the CD track separation distance, ie 0.74 microns. In order for the optical head to focus correctly on such small pits, DVDs use a thinner polycarbonate (PC) substrate than CDs. However, if a DVD were made from only a single sheet of such a thin substrate, the DVD would be too thin to be held smoothly by itself, and would not be playable in a conventional DVD player. Conventional DVD players require that DVD titles to be played must have a minimum thickness of about 1.2 millimeters. Therefore, in the manufacture of conventional DVDs, a bonding technique is used in which two 0.6 mm thick substrates are bonded 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 conventional DVD production process not only wastes substrate material, but also unnecessarily increases production costs by requiring expensive bonders and large amounts of adhesive. In addition, the bonding process not only prolongs the production time, but also reduces the yield rate of DVDs.

The first object of the present invention is to provide a digital versatile disc with a new structure, which is called Super Digital Versatile Disc (SDVD) herein. Super DVD has a data format compatible with conventional DVD, so it can be played in conventional DVD players, but its manufacturing process is relatively simple and saves raw materials.

The second purpose of this utility model is to provide a mold used for manufacturing the above-mentioned Super Digital Universal Disc.

In order to achieve the above-mentioned first purpose, the utility model provides a digital universal disk, including a central hole, a plate area concentric with the central hole and a data recording area, characterized in that:

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

In order to achieve the above-mentioned second purpose, the utility model provides a mold for manufacturing a digital universal disc, including:

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

a fluid injection hole arranged on the end face of the first mold base, through which fluid can be injected into the substrate forming space; and

The second mold base includes:

a central hub, the end surface of which is exposed to the end surface of the second mold base, and thus exposed to the substrate molding space, facing each other with the fluid injection hole, and

a stamping part nested in the central hub and movable relative to the end face of the second die holder to enter or leave the substrate forming space;

Described mold is characterized in that:

The end face of the central hub is recessed a first predetermined distance from the end face of the second die base to the interior of the second die base.

The super DVD according to the utility model is compatible with conventional DVDs and can be normally played in conventional DVD players, but saves about half of the raw materials compared with conventional DVDs.

The above and other features and advantages of the utility model will be more apparent through the detailed description of the best implementation mode of the utility model in conjunction with the accompanying drawings.

Fig. 1 is the top view of the first embodiment of the super DVD of the present utility model;

Fig. 2 is the sectional view of super DVD shown in Fig. 1;

Fig. 3 is the top view of the second embodiment of super DVD of the present utility model;

Fig. 4 is the sectional view of super DVD shown in Fig. 3;

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

The best embodiment of the utility model is described in detail below.

Fig. 1 is a top view of the first embodiment of the Super DVD of the present invention, which is the same as the top view of a conventional DVD. Number 1 is the center hole. Label 2 is the platen area, when the super DVD is loaded into the conventional DVD player, the corresponding platen plate (not shown) in the player will fix the super DVD at the platen area 2, so that the super DVD will Driven by (not shown), it rotates rapidly with the center hole 1 as the axis. Mark 3 is the data recording area, which is used to store audio, video and data according to the corresponding recording format according to different purposes. The recording format of the data recording area 3 can comply with any relevant DVD recording format specification in the prior art, so that Super DVD is compatible with conventional DVD, so that it can be played normally in conventional DVD players.

Of course, the recording format of the data recording area 3 in the Super DVD can also meet the specifications of any other related optical disc recording formats that may appear in the future. The different recording formats adopted by the data recording area 3 do not constitute a limitation to the present invention.

The diameter of the central 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 80mm or 120mm so that it can be played in a conventional DVD player. The various dimensions given here are only intended to allow Super DVDs to have a similar form factor to regular DVDs for playback in regular DVD players. These dimensions do not constitute limitations on the actual dimensions of the central hole 1 , the platen area 2 and the data recording area 3 .

FIG. 2 is a cross-sectional view of the Super DVD shown in FIG. 1 . As shown in FIG. 2, the platen area 2 and the data recording area 3 of the Super DVD are formed on the same single substrate, as shown by the oblique lines in the figure. The material constituting the substrate may be any suitable material known in the art, for example, it may be polycarbonate (PC) used in the manufacture of conventional CDs or DVDs.

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 about 0.6 mm. On the upper surface of the substrate portion used as the data recording area 3, pits representing data are embossed in a manner conforming to various specifications described above, and the substrate portion between two adjacent pits is called a land. Then, the upper surface of the substrate is coated with a metal film to reflect the laser beam for reading by the optical head. Various specifications related to recording data and the working mode of the optical head are well known to those skilled in the art, and will not be repeated here.

The novel structure described above can be used in various DVDs. For example, when manufacturing a DVD-R, a layer of photosensitive material, such as a dye layer, can be coated on the surface of the substrate used as the data recording area 3, and then irradiated with ultraviolet light at the position where the data is recorded 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. By this method, a DVD-R with a novel structure can be produced, that is, a Super DVD-R (SDVD-R). Alternatively, a composite material layer including multiple thin layers of different metal materials may be formed as a photosensitive material layer on the surface of the substrate serving as the data recording area 3 by multi-target metal plasma sputtering. By this method, a DVD-RW with a novel structure can be produced, that is, Super DVD-RW (SDVD-RW).

The Super DVD shown in Figures 1 and 2 has a circular shape, which is the most general case. According to different purposes and needs, the Super DVD of the present invention can adopt other different shapes, such as rectangle, square, ellipse, heart shape, 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 items, DVD greeting cards, DVD product catalogs, and more.

Fig. 3 is a top view of a second embodiment of the Super DVD of the present invention, showing the Super DVD having a rectangular shape. The number 1 is the central hole, the number 2 is the pressure plate area, and the number 3 is the data recording area, which are the same as the corresponding parts in Figure 1 and Figure 2, and will not be repeated. The only difference from Fig. 1 is that the reference number 4 is the outer area.

Various patterns or characters can be made on the data recording area 3 and the outer area 4 shown in each figure (in the present utility model, the characters are treated as patterns). Patterns, graphics made on the data recording area 3 or the outer area 4 may be used for decoration or illustration purposes. When the super DVD shown in Fig. 3 is used as a DVD business card, multiple contents such as name, title, work unit, telephone number and unit brief introduction of the business card holder can be made on the data recording area 3 and/or the outer area 4.

To make a pattern on the outer area 4, any method available in the prior art can be used, such as printing, engraving and the like.

Making patterns on the data recording area 3 requires the novel method provided by the present invention. As mentioned above, a large number of pits representing data are pressed in the data recording area 3, and lands are formed between adjacent pits. Therefore, depending on the pattern produced, some pits and/or lands can be selected from a large number of pits and lands, and their shape can be slightly changed to give them a special shape without affecting the data represented. The fabricated pattern is macroscopically combined from these specially shaped pits and/or lands.

Parts of the wells and/or lands can be given special shapes in a number of ways. For example, the pattern along with the data can be prefabricated onto a die and the die pressed onto the substrate during injection molding of the substrate. The pits and/or lands that need to be changed in shape can also be inscribed one by one again by laser after the data has been pressed onto the substrate by conventional methods.

In order to enable 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 zone 4 and the center of the central hole 1 must be less than or equal to 60 mm. The outer edge of the outer zone 4 may constitute a regular shape (eg circular, rectangular, square, oval, triangular, 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 platen area 2, the data recording area 3 and the outer area 4 of the Super DVD are formed on the same single substrate, as shown by the oblique lines in the figure. The difference from FIG. 2 is that an outer zone 4 is added. The outer area 4 may have the same thickness as the data recording area 3 .

When the Super DVD shown in Fig. 3 and Fig. 4 is irregular in shape, in order to be able to play the irregularly shaped Super DVD in a conventional DVD player normally, it needs to be on the lower surface of the disc in contact with the player tray, at a distance from the center At about 40 mm from the center of the hole 1, a fixing device is provided, as shown in number 5. The fixing device can be at least two protrusions formed on the substrate, or at least two glue edges bonded on the substrate, or a ring concentric with the central hole 1 .

Conventional DVD players have the ability to read compact discs with an outer diameter of 80mm, because the tray of the disc player has a specific concave track at the diameter of 80mm. When a Super DVD provided with a fixing device 5 as shown in Fig. 4 is mounted on the tray of a conventional DVD player, the fixing device 5 will engage in a recessed track having a diameter of 80 mm in the tray. Thus, even if the Super DVD has an irregular shape, it can be stably rotated by the motor in the DVD player.

Due to the selection of the data recording area 3 and the size of the outer area 4, the fixing device 5 can be positioned at the substrate lower surface at the data recording area 3, or at the lower surface of the substrate at the outer area 4, or between the data recording area 3 and the outer area. 4 The junction of the lower surface of the substrate. The relative positions of the fixing device 5 and the data recording area 3 and the outer area 4 do not limit the present invention.

Fig. 5 is a schematic diagram of a mold used in manufacturing the 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 end surface of the first mold base and the end surface of the second mold base face each other, and a substrate forming space 508 is formed between the end surface of the first mold base and the second mold base.

There is a fluid injection hole 503 on the end face of the first mold base. When injection molding the substrate of the Super DVD, the fluid used to form the substrate can be injected from the inside of the first mold base 501 to the substrate molding space 508 through the fluid injection hole 503 . This fluid can be, for example, molten polycarbonate.

The second mold base 502 includes:

A central hub 504, the end surface of which is exposed to the end surface of the second mold base, and then exposed to the substrate molding space 508, facing the fluid injection hole 503; and

A stamping member 505 nested in the central hub 504 is movable relative to the end face of the second die holder to enter or leave the substrate forming space 508 . The effect of stamping part 505 is, after Super DVD is injection-molded in substrate molding space 508, impacts quickly to the end face of second die base, thereby impacts on the Super DVD disk that is adsorbed on the end face of the second die base, for example, with a diameter of 15mm center hole.

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

As shown, the end face of the central hub 504 is recessed a first predetermined distance from the end face of the second die holder 502 into the interior of the second die holder 502 .

When injection molding super DVD, a mold piece 507 with a central hole (its diameter is generally about 33.5 millimeters) is vacuum-adsorbed on the second mold base end face, and the central hole of the mold piece 507 exposes the end surface of the central hub 504 to the substrate Forming space 508 .

In addition, there may be a limiting device 506 on the first mold base 501, which is used to limit the movement of the second mold base 502 when the second mold base 502 moves close to the first mold base 501, so that the end surface of the first mold base Keep a second predetermined distance 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 making the Super DVD of the present utility model, the mold shown in Fig. 5 is used like this. First, the die piece 507 is vacuum-adsorbed onto the end face of the second die base, so that the central hole of the die plate 507 coincides with the end face of the central hub. Then, the second mold base 502 moves toward the first mold base 501 until it contacts the limiting device 506 . After that, melted polycarbonate is injected into the substrate molding space 508 from the fluid injection hole 503 . The molded substrate is cooled by water cooling. Thereafter, the second mold base 502 leaves the first mold base 501 . At this time, the molded substrate is adhered to the die sheet 507 . The impact member 505 quickly impacts out of the end surface of the second mold holder, thereby impacting a central hole on the substrate. Finally, the manipulator removes the substrate from the second mold base for subsequent processing.

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

Claims (19)

1. digital universal disc comprises center pit (1), platen district (2) and the data recorded area (3) concentric with center pit (1), it is characterized in that:

Platen district (2) and data recorded area (3) are formed on the same single substrate, the substrate thickness that the substrate thickness that platen district (2) are located is located greater than data recorded area (3).

2. according to the digital universal disc of claim 1, it is characterized in that the substrate thickness located in platen district (2) is greater than 0.6 millimeter and be less than or equal to 1.5 millimeters.

3. according to the digital universal disc of claim 2, it is characterized in that the substrate thickness that data recorded area (3) is located is about 0.6 millimeter.

4. according to the digital universal disc of claim 3, the overall diameter that it is characterized in that data recorded area (3) is in 48 millimeters to 120 millimeters scope.

5. according to the digital universal disc of claim 3, it is characterized in that data recorded area (3) comprising:

Be compressed on on-chip a large amount of hole and platform, in order to represent recorded data;

Be plated in the metal level on described a large amount of hole and the platform, be used for the reflecting ﹠ transmitting substrate and incide laser beam on described a large amount of hole and the platform.

6. according to the digital universal disc of claim 5, it is characterized in that a described a large amount of hole and the part in platform hole and/or platform have special shape not influencing under the representative data conditions, the hole with described special shape with become platform to be combined into pattern.

7. according to the digital universal disc of claim 3, it is characterized in that data recorded area (3) comprising:

Be coated in on-chip photosensitive material layer;

Be plated in the metal level on the described photosensitive material layer, be used for the reflecting ﹠ transmitting substrate and incide laser beam on the described photosensitive material layer.

8. according to the digital universal disc of claim 7, it is characterized in that photosensitive material layer is a dye coating, hardened through UV-irradiation in some positions of dye coating, to represent recorded data.

9. according to the digital universal disc of claim 7, it is characterized in that photosensitive material layer is a composite layer, comprise multilayer different metal material thin layer, the position that is subjected to laser beam irradiation undergoes phase transition, and changes light transmission features.

10. according to each digital universal disc in the claim 1 to 9, it is characterized in that described digital universal disc also comprises an outside area (4) that holds data recorded area (3) fully.

11., it is characterized in that outside area (4) is formed on the same single substrate that constitutes platen district (2) and data recorded area (3) according to the digital universal disc of claim 10.

12., it is characterized in that the distance between the center of circle of any point on outside area (4) outward flange and center pit (1) is less than or equal to 60 millimeters according to the digital universal disc of claim 11.

13., it is characterized in that the outward flange of outside area (4) constitutes a circle according to the digital universal disc of claim 12.

14., it is characterized in that the outward flange of outside area (4) constitutes a rectangle according to the digital universal disc of claim 12.

15., it is characterized in that the outward flange of outside area (4) constitutes an irregular figure according to the digital universal disc of claim 12.

16. according to each digital universal disc in the claim 12 to 15, it is characterized in that described digital universal disc with lower surface that the player pallet contacts on, about 40 millimeters places have stationary installation in the center of circle of distance center hole (1).

17., it is characterized in that stationary installation is at least two projectioies according to the digital universal disc of claim 16.

18., it is characterized in that stationary installation is at least two glue limits according to the digital universal disc of claim 16.

19. according to the digital universal disc of claim 16, it is characterized in that stationary installation be one with the concentric ring of center pit (1).

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