Optical storage medium and related method and device

Abstract

The present application provides an optical storage medium and a related method and device. The optical storage medium comprises: a first wobble groove layer and a plurality of first recording layers located between a first surface and a second surface. The first recording layers are located between the first wobble groove layer and the first surface. The first wobble groove layer comprises a plurality of first sectors, each first sector carries first address information, and the first address information comprises first surface number information and first intra-layer address information. Each recording layer comprises a plurality of second sectors, the position of each second sector corresponds to the position of one first sector, each second sector carries second address information, and the second address information comprises: first layer number information and second intra-layer address information. Thus, accurate and rapid data reading and writing can be realized, so that the structure of an optical storage medium can be simplified, and the manufacturing difficulty and cost are reduced. Therefore, more recording layers can be configured in the optical storage medium, and the storage capacity of the optical storage medium is improved.

Description

Optical storage medium and related method and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on July 20, 2023, with application number 202310897418.6 and application name “An optical storage medium and related methods and devices thereof”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of optical storage technology, and in particular to an optical storage medium and related methods and devices. Background Art

[0004] With the rapid development of information technology, the amount of data generated by various types of information is growing exponentially, placing high demands on data storage. Compared to storage media like hard disks and magnetic tapes, optical storage media offer advantages such as long storage life, low maintenance costs, energy conservation and environmental protection, and high reliability. As a result, optical storage media have gained widespread application. However, their storage capacity is relatively small, and expanding their capacity is an urgent market need.

[0005] In related technologies, the use of multiple recording layers is an effective measure to significantly increase the storage capacity of optical storage media. For example, Blu-ray Discs (BDs) have several specifications, including single-sided dual-layer (storage capacity of 50GB), single-sided triple-layer (storage capacity of 100GB), and single-sided quadruple-layer (storage capacity of 128GB). Another example is an archival disc (AD) with double-sided six-layer (storage capacity of 300GB or 500GB).

[0006] However, for optical storage media with multiple recording layers, wobble grooves need to be made in each recording layer, which makes the manufacturing process of the optical storage medium very complicated, resulting in increased manufacturing costs and reduced yields of the optical storage medium. Due to the limitations of the manufacturing process, a maximum of eight recording layers can currently be made in the optical storage medium, and the number of recording layers in the optical storage medium cannot be increased, which seriously limits further improvements in the storage capacity of the optical storage medium.

[0007] Summary of the Invention

[0008] The embodiments of the present application provide an optical storage medium and related methods and devices, which are used to simplify the manufacturing process of the optical storage medium and reduce the manufacturing cost, thereby breaking through the limitations of the manufacturing process, producing more recording layers in the optical storage medium, and further improving the storage capacity of the optical storage medium.

[0009] In a first aspect, embodiments of the present application provide an optical storage medium. The optical storage medium in the embodiments of the present application may include: a first surface and a second surface disposed opposite each other, a first wobble groove layer and multiple first recording layers disposed between the first surface and the second surface, each first recording layer being located between the first wobble groove layer and the first surface.

[0010] In one possible implementation, the optical storage medium may have a single-sided storage structure, and the optical storage medium may be provided with a wobble groove layer (i.e., a first wobble groove layer) and multiple recording layers (i.e., a first recording layer) on only one side. In another possible implementation, the optical storage structure may have a double-sided storage structure, and the optical storage medium may be provided with a wobble groove layer and multiple recording layers on both sides. That is, in addition to the first wobble groove layer and multiple first recording layers described above, the optical storage medium may also include: a second wobble groove layer and multiple second recording layers located between the first wobble groove layer and the second surface, each second recording layer being located between the second wobble groove and the second surface. In a specific implementation, the optical storage medium may be configured as a single-sided storage structure or a double-sided storage structure, and the number of recording layers may be set according to actual needs, which is not limited here.

[0011] In an embodiment of the present application, the first wobble groove layer may include multiple first sectors, each of which carries first address information, and the first address information may include: first surface number information and first-layer intra-address information. The first surface number information is used to characterize the first surface S1, and the first-layer intra-address information is used to characterize the position information of the first sector in the first wobble groove layer. Each first recording layer may include multiple second sectors, and the position of each second sector corresponds to the position of a first sector. The orthographic projection of the second sector on the first wobble groove layer 11 has an overlapping area with the first sector at the corresponding position. Each second sector carries second address information, and the second address information may include: first layer number information and second-layer intra-address information, wherein the first layer number information is used to characterize the layer number of the first recording layer where the second sector is located, and the second-layer intra-address information is used to characterize the position information of the second sector in the first recording layer.

[0012] Similar to the structures of the first wobbled groove and the first recording layer, the second wobbled groove layer and the second recording layer may have the following structures:

[0013] The second wobble groove layer may include multiple third sectors, each of which carries third address information. The third address information may include: second surface number information and third intra-layer address information, wherein the second surface number information is used to represent the second surface, and the third intra-layer address information is used to represent the position information of the third sector in the second wobble groove layer. Each second recording layer may include multiple fourth sectors, wherein the position of each fourth sector corresponds to the position of a third sector, and the orthographic projection of the fourth sector on the second wobble groove layer overlaps with the third sector at the corresponding position. Each fourth sector carries fourth address information, and the fourth address information includes: second layer number information and fourth intra-layer address information, wherein the second layer number information is used to represent the layer number of the second recording layer where the fourth sector is located, and the fourth intra-layer address information is used to represent the position information of the fourth sector in the second recording layer.

[0014] The structure of the second wobbling groove can be implemented with reference to the structure of the first wobbling groove. Specifically, the specific setting of the third sector can refer to the specific setting of the above-mentioned first sector. The structure of the second recording layer can be implemented with reference to the structure of the first recording layer. Specifically, the specific setting of the fourth sector can refer to the specific setting of the above-mentioned second sector. The repeated parts will not be repeated here.

[0015] In an embodiment of the present application, a first wobble groove layer and multiple first recording layers are provided on the same side of the optical storage medium, that is, the multiple first recording layers on the same side of the optical storage medium correspond to the same first wobble groove layer. Furthermore, by setting first address information in the first sector of the first wobble groove layer, the first address information may include: first surface number information and first layer internal address information, and by setting second address information in the second sector of the first recording layer, the second address information may include: first layer number information and second layer internal address information. In this way, during the data reading and writing process, the set position of a first recording layer on a certain side of the optical storage medium can be quickly located, achieving accurate and rapid data reading and writing. Therefore, the solution of the embodiment of the present application can simplify the internal structure of the optical storage medium, reduce the difficulty and cost of the manufacturing process, thereby breaking through the limitations of the manufacturing process, and producing more first recording layers in the optical storage medium, which can further increase the storage capacity of the optical storage medium.

[0016] In a specific implementation, an optical signal can be used to act on an optical storage medium to implement data writing and reading operations. In an embodiment of the present application, during the data reading and writing process, two beams of light, a guiding light beam and a recording light beam, need to be applied to the optical storage medium. The guiding light beam is used to focus on the first wobbling groove layer to locate the data reading and writing position. The recording light beam is used to focus on the first recording layer to implement data reading and writing operations. Specifically, during the data writing process, when the recording light beam acts on the first recording layer, it can change the physical or chemical properties of the first recording layer, thereby implementing the data writing operation. During the data reading process, the reflected light of the recording light beam can be detected, and the data stored in the first recording layer can be determined based on the reflected light of the recording light beam to implement the data reading operation.

[0017] The wobble grooves in the first wobble groove layer serve as a reference for focusing and tracking. During data reading and writing, the recording beam and guide beam can be controlled to move synchronously. In a specific implementation, the lens can be controlled to emit a guide beam and a recording beam with different wavelengths. For example, the guide beam can be a red laser beam, and the recording beam can be a blue laser beam. Optionally, a lens can be positioned on the light-emitting side of the lens to converge the guide and recording beams.

[0018] A wobble groove is provided in the first wobble groove layer, and the wobble groove is recessed relative to other locations in the first wobble groove layer. The optical paths of the light signals directed to the inside and outside of the wobble groove are different. By detecting the reflected light of the guide light beam, it can be determined whether the guide light beam is focused on the wobble groove based on the intensity of the reflected light of the guide light beam. During the reading and writing process of the optical storage medium, the guide light beam can be controlled to move along the trajectory of the wobble groove. In a specific implementation, various coded information can be represented by the wobble frequency of the wobble groove. For example, a specific frequency change can be set in the wobble groove to represent the above-mentioned first address information. During the production process of the optical storage medium, a protrusion with a shape opposite to that of the wobble groove can be provided in the mold, and the mold injection molding process is used to obtain the wobble groove carrying the first address information.

[0019] In one possible implementation, the position of each second sector in the first recording layer corresponds to the position of a first sector in the first wobble groove layer, and the address information in the second layer of the second sector can be identical to the address information in the first layer of the corresponding first sector. In this way, during reading and writing operations on the optical storage medium, the recording beam and the guide beam move synchronously, allowing for rapid location of the second sector in the first recording layer.

[0020] Specifically, the optical storage medium in the embodiments of the present application can be a ring-shaped optical disc. The first sector in the first wobble groove layer may include: a first data servo area, a first lead-in area, a first user data area, and a first lead-out area, arranged sequentially from the inner circumference to the outer circumference of the optical disc, with the first data servo area carrying first address information. The second sector in each first recording layer may include: a second data servo area, a second lead-in area, a second user data area, and a second lead-out area, arranged sequentially from the inner circumference to the outer circumference of the optical disc, with the second data servo area carrying second address information.

[0021] In the embodiment of the present application, a first data servo area is provided in the first sector of the first wobble groove layer to store first address information in the first data servo area. Furthermore, a second data servo area is provided in the second sector of each first recording layer to store second address information in the second data servo area. This assists the servo system in quickly locating the data read / write position during the reading and writing process of the optical storage medium. Furthermore, this assists the servo system in quickly finding and positioning the layer, thereby improving layer finding reliability.

[0022] In an embodiment of the present application, to improve the reliability of data stored in the optical storage medium, the address objects of the first wobble groove layer and each first recording layer can be configured as error correction code (ECC) blocks. This allows the ECC blocks to correct errors in the event of a data read failure or erroneous data from the optical storage medium. For example, the size of each ECC block Sk can be 64 kb, and the size of each sector (first or second sector) can be 2 kb, meaning each ECC block can include 32 sectors.

[0023] For example, the physical address range of each sector (the first sector or the second sector) can be CL, the size of the data servo area (the first data servo area or the second data servo area) can be Cs, the size of the lead-in area (the first lead-in area or the second lead-out area) can be Cin, the size of the lead-out area (the first lead-out area or the second lead-out area) can be Cout, and the size of the user data area (the first user data area or the second user data area) can be CL-Cs-Cin-Cout. The byte capacity of the ECC block is Sk, and the single-layer byte capacity of the first wobble groove layer and each first recording layer is CL*Sk. The logical address of the optical storage medium only addresses the user data area.

[0024] For example, the first address information of the first wobble groove layer may be composed of 25 bits, wherein the first surface number information may be 1 bit, representing a range of 0 to 1, for indicating which side of the optical storage medium the current surface is. The first layer internal address information may be 24 bits, for example, the first layer internal address information may be represented as A 23 A22 ...A0, indicating the range 0~CL(0~2 24 In a specific implementation, the first address information can be reflected by the waveform of the wobbling groove.

[0025] During the initialization phase of reading and writing operations on the optical storage medium, the driver in the servo system can read the first surface number information in the first wobbling groove layer and store the read first surface number information in the memory of the driver. During the reading and writing process of the optical storage medium, the first surface number information stored in the driver can be encoded into the second address information of the first recording layer. The encoded second address information may include: first surface number information, first layer number information and second layer internal address information. During the reading and writing process, read and write operations can be performed based on the encoded second address information. For example, the encoded second address information can be composed of 33 bits, wherein the second layer internal address information can be 24 bits, and the second layer internal address information can be the same as the first layer internal address information of the corresponding first sector. For example, the second layer internal address information can be represented as A 23 A 22 ...A0, indicating the range 0~CL(0~2 24 The first layer number information may be 8 bits. For example, the first layer number information may be represented as A 31 A 30 A…A 24 , indicating a range of 0 to N (0 to 2 8 ), which can represent up to 256 first recording layers.

[0026] The above is an example of the representation of the first address information and the second address information. In specific implementation, the specific representation of the first address information and the second address information can be set according to actual needs, and is not limited here.

[0027] In a second aspect, the embodiments of the present application further provide a method for manufacturing an optical storage medium. The method for manufacturing an optical storage medium in the embodiments of the present application can be performed by manufacturing equipment on a production line.

[0028] In the implementation of this application, the method for manufacturing the optical storage medium may include:

[0029] Step 1: forming a plurality of first recording layers on a substrate, wherein each first recording layer includes a plurality of second sectors.

[0030] In an embodiment of the present application, the first recording layer may include a material that can produce a change in physical or chemical properties when subjected to an optical signal. For example, the first recording layer may include a copper (Cu) material layer and a silicon (Si) material layer. Before the optical signal is irradiated, the reflectivity of the silicon material layer is relatively high. After being subjected to the optical signal, a thermal effect is generated at the focal point of the first recording layer, causing Cu and Si to form a CuSi alloy. The CuSi alloy has a relatively high reflectivity, that is, the optical signal can cause the reflectivity of the first recording layer to change. In this way, during the data writing process, a recording light beam can be focused on the first recording layer, and the reflectivity of the first recording layer can be changed by the recording light beam, thereby writing data in the first recording layer. During the data reading process, the reflected light of the recording light beam focused on the first recording layer can be detected. By detecting the intensity of the reflected light of the recording light beam, the data stored in the first recording layer can be determined, thereby enabling the reading of the data stored in the first recording layer.

[0031] Step 2: Form a first wobble groove layer on the multiple first recording layers. The first wobble groove layer includes multiple first sectors, each of which corresponds to a second sector. The orthographic projection of the second sector on the first wobble groove layer overlaps the first sector at the corresponding position. Each first sector carries first address information, which includes first surface number information and first-layer intra-address information. The first surface number information identifies the first surface of the substrate, and the first-layer intra-address information identifies the position of the first sector in the first wobble groove layer. In practical applications, a protrusion having a shape opposite to that of the first wobble groove layer can be fabricated in a mold, and the mold can be injection molded to produce the first wobble groove layer carrying the first address information.

[0032] Step 3: Write second address information to each of the plurality of second sectors of the first recording layer. The second address information includes first layer number information and second layer intra-address information. The first layer number information is used to indicate the layer number of the first recording layer where the second sector is located, and the second layer intra-address information is used to indicate the location information of the second sector in the first recording layer.

[0033] Specifically, writing the second address information to the plurality of second sectors of each first recording layer in the above step 3 may specifically include:

[0034] The guide beam is controlled to focus on the first wobbled groove layer, and first address information of the first sector currently focused on by the guide beam is determined based on the reflected light of the guide beam. Since the first wobbled groove layer produced in the above steps carries the first address information, the first address information of the first sector currently focused on by the guide beam can be obtained by detecting the reflected light of the guide beam and decoding the information carried by the reflected light of the guide beam.

[0035] The recording beam is controlled to focus on the first recording layer and synchronized with the guide beam. Because the first wobbling groove layer includes a wobbling groove for focusing and tracking, while the first recording layer does not, the recording beam is controlled to move synchronously with the guide beam. This allows the second sector focused on by the recording beam to correspond to the first sector focused on by the guide beam. Subsequently, the address information within the second layer of the second sector can be set to be the same as the address within the first layer of the corresponding first sector.

[0036] Based on the reflected light of the recording light beam, the first layer number information of the first recording layer on which the recording light beam is currently focused is determined. In a specific implementation, a four-quadrant detector can be used to detect the reflected light of the recording light beam, and the four-quadrant detector can collect signal values ​​of the four quadrants A, B, C, and D. The servo system can obtain a focus error (FE) value based on the signal values ​​of the four quadrants collected. The FE value is used to indicate whether the recording light beam is focused on the first recording layer. When the FE value is 0, it means that the recording light beam is focused on the first recording layer. When the FE value is greater than 0, it means that the recording light beam is not focused on the first recording layer. During the production process, the servo system will scan each first recording layer at the maximum range, and by controlling the movement of the lens, the recording light beam is focused on each first recording layer in turn. The first layer number information of the currently focused first recording layer can be determined by counting layer by layer.

[0037] Based on the determined first layer number information and the first address information of the first sector currently focused by the guiding light beam, the second address information of the second sector currently focused by the recording light beam is determined, and the determined second address information is written into the second sector currently focused by the recording light beam; wherein the address information in the second layer of the second sector is the same as the address information in the first layer of the corresponding first sector.

[0038] According to the above method, the second address information can be written to the multiple second sectors of each first recording layer. Since the second address information includes the first layer number information and the address information within the second layer, during the subsequent data writing and reading process, the first layer number information can be used to achieve fast layer positioning.

[0039] In the method for manufacturing an optical storage medium provided in an embodiment of the present application, by forming a wobble groove carrying first address information in the first wobble groove layer and writing second address information into multiple first recording layers, the set position of a first recording layer on a certain side of the optical storage medium can be quickly located during subsequent data reading and writing processes, achieving accurate and rapid data reading and writing. Furthermore, the solution of the embodiment of the present application can simplify the internal structure of the optical storage medium, reducing the difficulty and cost of the manufacturing process. This can overcome the limitations of the manufacturing process, allowing the production of more first recording layers in the optical storage medium, and further increasing the storage capacity of the optical storage medium.

[0040] In a third aspect, embodiments of the present application further provide a layer-finding method for an optical storage medium, which can be applied during data writing or reading from any optical storage medium described in the first aspect. The layer-finding method for an optical storage medium in embodiments of the present application may include:

[0041] The guide beam is controlled to focus on the first wobbled groove layer, and the recording beam, which is synchronized with the guide beam, is controlled to randomly focus on a first recording layer. In a specific implementation, the guide beam can be controlled to focus on a first sector in the first wobbled groove layer, so that the recording beam is focused on a second sector corresponding to the first sector.

[0042] The first layer number information of the first recording layer currently focused by the recording beam is determined based on the reflected light of the recording beam. Specifically, the second address information carried by the second sector focused by the recording beam can be determined based on the reflected light of the recording beam, and the first layer number information of the current first recording layer can be determined based on the second address information.

[0043] determining distance information between the first recording layer and the target recording layer according to the first layer number information of the first recording layer and the layer number information of the target recording layer; wherein the target recording layer is the first recording layer to be read or written;

[0044] The recording beam is controlled to move according to the determined distance information so that the recording beam is focused on the target recording layer. In the process of controlling the movement of the recording beam, the distance information can be counted layer by layer to move the recording beam to the target recording layer.

[0045] For example, consider an optical storage medium with one first wobble groove layer and ten first recording layers on the same side, with the target recording layer being the fifth first recording layer. In related art techniques, the recording beam is controlled to first locate the first wobble groove layer, then controlled to move from the first wobble groove layer toward each first recording layer, counting layer by layer until it reaches the fifth first recording layer. This layer-seeking method in related art seeks layers sequentially through each first recording layer, resulting in slow layer-seeking speed and a high probability of layer-seeking errors. In the layer-seeking method of the present embodiment, the recording beam can be controlled to randomly focus on a first recording layer. Based on the reflected light of the recording beam, the first layer number information of the current first recording layer can be obtained, for example, if the current first recording layer is the third first recording layer. The recording beam is then controlled to move two first recording layers, allowing it to focus on the fifth first recording layer. Compared to related art layer-seeking methods, the layer-seeking method provided in the present embodiment can achieve layer-seeking based on the first layer number information of the first recording layer, shortening the distance the recording beam travels and accelerating layer-seeking speed. Since the distance the recording light beam moves is shorter, the possibility of layer seeking errors is smaller, which improves the reliability of layer seeking.

[0046] In addition, the above layer-finding method may further include:

[0047] re-determining first layer number information of the first recording layer on which the recording beam is focused based on the reflected light of the recording beam;

[0048] Based on the determined first layer number information of the first recording layer, it is determined whether the first recording layer on which the recording light beam is focused is the target recording layer; if the first recording layer on which the recording light beam is currently focused is not the target recording layer, the distance information between the first recording layer and the target recording layer is re-determined, and the movement of the recording light beam is controlled according to the determined distance information until the recording light beam is focused on the target recording layer.

[0049] In the embodiment of the present application, whether the currently focused first recording layer is the target recording layer can be verified based on the first layer number information of the first recording layer, thereby further improving the reliability of layer seeking.

[0050] Fourthly, embodiments of the present application further provide a layer-finding device for an optical storage medium. The layer-finding device in embodiments of the present application may be a data writing device for the optical storage medium, or a data reading device for the optical storage medium, or a read-write device for the optical storage medium. For example, the layer-finding device in embodiments of the present application may be an optical drive.

[0051] The layer-finding device of the optical storage medium in the embodiment of the present application may include:

[0052] The servo driver is used for controlling the guide beam to focus on the first wobbling groove layer and controlling the recording beam synchronized with the guide beam to focus on a first recording layer.

[0053] a processor configured to determine, based on reflected light of the recording light beam, first layer number information of a first recording layer on which the recording light beam is currently focused; and determine, based on the first layer number information of the first recording layer and layer number information of the target recording layer, distance information between the first recording layer and a target recording layer; the target recording layer being the recording layer to be read or written;

[0054] The servo driver is further used to control the movement of the recording light beam according to the determined distance information so that the recording light beam is focused on the target recording layer.

[0055] Furthermore, in some embodiments of the present application, the processor may also be configured to: after the servo driver controls the movement of the recording beam according to the determined distance information so that the recording beam is focused on the target recording layer, re-determine the first layer number information of the first recording layer on which the recording beam is focused according to the reflected light of the recording beam; and determine, based on the determined layer number information of the first recording layer, whether the first recording layer currently focused on by the recording beam is the target recording layer; if the first recording layer focused on by the recording beam is not the target recording layer, re-determine the distance information between the first recording layer and the target recording layer, and control the servo driver to control the movement of the recording beam according to the determined distance information until the recording beam is focused on the target recording layer.

[0056] In the layer-finding device provided in an embodiment of the present application, a servo driver can control the recording light beam to randomly focus on a first recording layer. A processor can obtain the first layer number information of the current first recording layer based on the reflected light of the recording light beam, and determine the distance information between the current first recording layer and the target recording layer. This allows the servo driver to control the movement of the recording light beam based on the determined distance information so that the recording light beam focuses on the target recording layer. In this way, layer-finding can be achieved based on the first layer number information of the first recording layer, shortening the distance traveled by the recording light beam and accelerating the layer-finding speed. Because the recording light beam travels a shorter distance, the likelihood of layer-finding errors is reduced, thereby improving the reliability of layer-finding. Furthermore, the processor can verify whether the currently focused first recording layer is the target recording layer based on the first layer number information of the first recording layer, further improving the reliability of layer-finding.

[0057] In a fifth aspect, embodiments of the present application further provide an electronic device, which may include: any layer-finding device described in the fourth aspect and a housing, wherein the layer-finding device is located within the housing. For example, the electronic device may be a laptop computer, desktop computer, server, or other device having a layer-finding device. Because the layer-finding device can quickly find the layer of an optical storage medium with high reliability, the electronic device including the layer-finding device can achieve rapid reading and writing of the optical storage medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] FIG1 is a schematic diagram of the structure of an optical storage medium provided in an embodiment of the present application;

[0059] FIG2 is another schematic diagram of the structure of the optical storage medium provided in an embodiment of the present application;

[0060] FIG3 is a schematic diagram of a planar structure of a first wobble groove layer in an embodiment of the present application;

[0061] FIG4 is a schematic diagram of the encoding method of the first sector and the second sector in an embodiment of the present application;

[0062] FIG5 is a flow chart of a method for manufacturing an optical storage medium according to an embodiment of the present application;

[0063] FIG6 is a flow chart of a layer-finding method for an optical storage medium according to an embodiment of the present application;

[0064] FIG7 is a schematic structural diagram of a layer-seeking device for an optical storage medium according to an embodiment of the present application.

[0065] Reference numerals: 11 - first wobbled groove layer; 111 - wobbled groove; 12 - first recording layer; 13 - lens; 14 - second wobbled groove layer; 15 - second recording layer; 401 - servo driver; 402 - processor; S1 - first surface; S2 - second surface; P1 - guide beam; P2 - recording beam. DETAILED DESCRIPTION

[0066] With the rapid development of information technology, the amount of data generated by various types of information is growing exponentially, placing higher demands on data storage. Compared to storage media like hard disks and magnetic tapes, optical storage media offer advantages such as long storage life, low maintenance costs, energy conservation and environmental protection, and high reliability. As a result, optical storage media has been widely used.

[0067] However, optical storage media have relatively low storage capacity, and expanding their capacity is an urgent market need. Related technologies have employed multiple recording layers to increase the storage capacity of optical storage media. However, for optical storage media with multiple recording layers, wobble grooves must be formed in each recording layer, making the manufacturing process of the optical storage medium very complex, resulting in increased production costs and reduced yields. Due to manufacturing process limitations, a maximum of eight recording layers can currently be fabricated in optical storage media, making it impossible to increase the number of recording layers in optical storage media. This severely limits further increases in the storage capacity of optical storage media.

[0068] Based on this, in order to simplify the manufacturing process of optical storage media, reduce manufacturing costs, and further increase the storage capacity of optical storage media, embodiments of the present application provide an optical storage medium and related methods and devices. The optical storage medium in the embodiments of the present application can be a medium that uses lasers to read and write data. For example, the optical storage medium can be various types of optical discs such as Blu-ray discs or archival discs.

[0069] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0070] It should be noted that the same reference numerals in the drawings of this application represent the same or similar structures, and thus their repeated description will be omitted. The words expressing positions and directions described in this application are all explained using the drawings as examples, but they can be modified as needed, and such modifications are included in the scope of protection of this application. The drawings of this application are only for illustrating relative positional relationships and do not represent true proportions.

[0071] Figures 1 and 2 are schematic structural diagrams of the optical storage medium provided in an embodiment of the present application. As shown in Figures 1 and 2, the optical storage medium in the embodiment of the present application may include: a first surface S1 and a second surface S2 arranged opposite to each other, and a first wobble groove layer 11 and multiple first recording layers 12 arranged between the first surface S1 and the second surface S2, and each layer of the first recording layer 12 is located between the first wobble groove layer 11 and the first surface S1.

[0072] As shown in FIG1 , in one possible implementation, the optical storage medium may have a single-sided storage structure, in which a wobble groove layer (i.e., a first wobble groove layer 11) and a multi-layer recording layer (i.e., a first recording layer 12) may be provided on only one side of the optical storage medium. FIG1 illustrates an example in which the optical storage medium has a single first wobble groove layer 11 and a multi-layer recording layer 12 on one side of the first surface S1. As shown in FIG2 , in another possible implementation, the optical storage structure may have a double-sided storage structure, in which a single wobble groove layer and a multi-layer recording layer may be provided on both sides of the optical storage medium. That is, in addition to the first wobble groove layer 11 and the multi-layer recording layer 12, the optical storage medium may further include: a second wobble groove layer 14 located between the first wobble groove layer 11 and the second surface S2, and a multi-layer recording layer 15, each of which is located between the second wobble groove layer 14 and the second surface S2. In Figure 1, an optical storage medium with six first recording layers 12 is taken as an example, and in Figure 2, an optical storage medium with six first recording layers 12 and six second recording layers 15 is taken as an example. In actual applications, the number of first recording layers 12 and second recording layers 15 can be set according to actual needs, and is not limited here.

[0073] In specific implementations, the optical storage medium can be configured as a single-sided storage structure or a double-sided storage structure, depending on actual needs. In the subsequent embodiments of this application, an optical storage medium having a first wobbled groove layer 11 and a multi-layered first recording layer 12 on one side of the first surface S1 is used as an example for explanation. When the optical storage medium has a double-sided storage structure, the implementation of the second wobbled groove layer 14 and the multi-layered second recording layer 15 on the second surface S2 can be similar to that of the first wobbled groove layer 11 and the multi-layered first recording layer 12 on the first surface S1, and any repetitions are omitted.

[0074] Continuing with reference to Figures 1 and 2, the first wobble groove layer 11 may include multiple first sectors, each of which carries first address information. The first address information may include: first surface number information and first-layer intra-address information. The first surface number information is used to characterize the first surface S1, and the first-layer intra-address information is used to characterize the position information of the first sector in the first wobble groove layer. Each first recording layer 12 may include multiple second sectors, and the position of each second sector corresponds to the position of a first sector. The orthographic projection of the second sector on the first wobble groove layer 11 has an overlapping area with the first sector at the corresponding position. Each second sector carries second address information, and the second address information may include: first layer number information and second-layer intra-address information. The first layer number information is used to characterize the layer number of the first recording layer where the second sector is located, and the second-layer intra-address information is used to characterize the position information of the second sector in the first recording layer.

[0075] As shown in FIG2 , similar to the structures of the first wobble groove layer 11 and the first recording layer 12 , the second wobble groove layer 14 and the second recording layer 15 may have the following structures:

[0076] The second wobble groove layer 14 may include multiple third sectors, each of which carries third address information. The third address information may include: second surface number information and third intra-layer address information, wherein the second surface number information is used to represent the second surface S2, and the third intra-layer address information is used to represent the position information of the third sector in the second wobble groove layer 14. Each second recording layer 15 may include multiple fourth sectors, each of which corresponds to the position of a third sector, and the orthographic projection of the fourth sector on the second wobble groove layer 14 overlaps with the third sector at the corresponding position. Each fourth sector carries fourth address information, which includes: second layer number information and fourth intra-layer address information, wherein the second layer number information is used to represent the layer number of the second recording layer where the fourth sector is located, and the fourth intra-layer address information is used to represent the position information of the fourth sector in the second recording layer.

[0077] The structure of the second wobbling groove layer 14 can be implemented with reference to the structure of the first wobbling groove layer 11. Specifically, the specific setting of the third sector can refer to the specific setting of the above-mentioned first sector. The structure of the second recording layer 15 can be implemented with reference to the structure of the first recording layer 12. Specifically, the specific setting of the fourth sector can refer to the specific setting of the above-mentioned second sector. The repeated parts will not be repeated here.

[0078] In an embodiment of the present application, a first wobble groove layer 11 and multiple first recording layers 12 are provided on one side of a first surface S1 of an optical storage medium. Specifically, multiple first recording layers 12 on the same side of the optical storage medium correspond to the same first wobble groove layer 11. Furthermore, first address information is set in the first sector of the first wobble groove layer 11. The first address information may include first surface number information and first layer intra-address information. Second address information is set in the second sector of the first recording layer 12. The second address information may include first layer number information and second layer intra-address information. This allows rapid location of a specific first recording layer 12 on a specific surface of the optical storage medium during data reading and writing, enabling accurate and rapid data reading and writing. Therefore, the solution of this embodiment of the present application can simplify the internal structure of the optical storage medium, reduce the difficulty and cost of the manufacturing process, and thereby overcome manufacturing process limitations. This allows for the fabrication of more first recording layers 12 within the optical storage medium, further increasing the storage capacity of the optical storage medium.

[0079] As shown in Figures 1 and 2, an optical signal can be used to act on an optical storage medium to implement data writing and reading operations. In an embodiment of the present application, during the data reading and writing process, two beams of light, a guiding light beam P1 and a recording light beam P2, need to act on the optical storage medium. The guiding light beam P1 is used to focus on the first oscillating groove layer 11, and plays the role of locating the data reading and writing position. The recording light beam P2 is used to focus on the first recording layer 12 to implement data reading and writing operations. Specifically, during the data writing process, when the recording light beam P2 acts on the first recording layer 12, the physical or chemical properties of the first recording layer 12 can be changed, thereby implementing the data writing operation. During the data reading process, the reflected light of the recording light beam P2 can be detected, and the data stored in the first recording layer 12 can be determined based on the reflected light of the recording light beam P2 to implement the data reading operation.

[0080] The wobble grooves in the first wobble groove layer 11 serve as a reference for focusing and tracking. During data reading and writing, recording beam P2 can be controlled to move synchronously with guide beam P1. In a specific implementation, the lens can be controlled to emit guide beam P1 and recording beam P2 with different wavelengths. For example, guide beam P1 can be a red laser beam, and recording beam P2 can be a blue laser beam. Optionally, a lens 13 can be positioned on the light-emitting side of the lens to converge guide beam P1 and recording beam P2.

[0081] Figure 3 is a schematic planar structure diagram of the first wobble groove layer in an embodiment of the present application. As shown in Figure 3, a wobble groove 111 is provided in the first wobble groove layer 11. Wobble groove 111 is recessed relative to the rest of the first wobble groove layer 11. The optical paths of light signals directed into and out of wobble groove 111 are different. By detecting the reflected light of guide beam P1 and determining its intensity, it is possible to determine whether guide beam P1 is focused on wobble groove 111. During the reading and writing process of the optical storage medium, guide beam P1 can be controlled to move along the trajectory of wobble groove 111. In specific implementations, the wobble frequency of wobble groove 111 can represent various encoded information. For example, a specific frequency variation can be set in wobble groove 111 to represent the first address information. During the production of the optical storage medium, a protrusion with a shape opposite to that of wobble groove 111 can be provided in the mold. Using this mold in an injection molding process, wobble groove 111 carrying the first address information can be obtained.

[0082] As shown in Figures 1 and 2, the position of each second sector in the first recording layer 12 corresponds to the position of a first sector in the first wobble groove layer 11. The address information within the second layer of the second sector can be identical to the address information within the first layer of the first sector at the corresponding position. Thus, during the reading and writing process of the optical storage medium, the recording beam P2 and the guide beam P1 move synchronously, allowing the position of the second sector in the first recording layer 12 to be quickly located.

[0083] FIG4 is a schematic diagram illustrating the encoding method for the first and second sectors in an embodiment of the present application. As shown in FIG4 , the optical storage medium in an embodiment of the present application may be a ring-shaped optical disc. The first sector in the first wobble groove layer may include: a first data servo area, a first lead-in area, a first user data area, and a first lead-out area, arranged sequentially from the inner periphery to the outer periphery of the optical disc. The first data servo area carries first address information, i.e., the first address information is stored in the first data servo area. The second sector in each of the first recording layers 1-N may include: a second data servo area, a second lead-in area, a second user data area, and a second lead-out area, arranged sequentially from the inner periphery to the outer periphery of the optical disc. The second data servo area carries second address information, i.e., the second address information is stored in the second data servo area.

[0084] In the embodiment of the present application, a first data servo area is provided in the first sector of the first wobble groove layer to store first address information in the first data servo area. Furthermore, a second data servo area is provided in the second sector of each first recording layer to store second address information in the second data servo area. This assists the servo system in quickly locating the data read / write position during the reading and writing process of the optical storage medium. Furthermore, this assists the servo system in quickly finding and positioning the layer, thereby improving layer finding reliability.

[0085] In an embodiment of the present application, to improve the reliability of data stored in the optical storage medium, the address objects of the first wobble groove layer and each first recording layer can be configured as error correction code (ECC) blocks. This allows the ECC blocks to correct errors in the event of a data read failure or erroneous data from the optical storage medium. For example, the size of each ECC block Sk can be 64 kb, and the size of each sector (first or second sector) can be 2 kb, meaning each ECC block can include 32 sectors.

[0086] Continuing with FIG4 , for example, the physical address range of each sector (the first sector or the second sector) may be CL, the size of the data servo area (the first data servo area or the second data servo area) may be Cs, the size of the lead-in area (the first lead-in area or the second lead-in area) may be Cin, the size of the lead-out area (the first lead-out area or the second lead-out area) may be Cout, and the size of the user data area (the first user data area or the second user data area) may be CL - Cs - Cin - Cout. The byte capacity of the ECC block is Sk, and the single-layer byte capacity of the first wobble groove layer and each first recording layer is CL*Sk. The logical address of the optical storage medium addresses only the user data area.

[0087] For example, the first address information of the first wobble groove layer may be composed of 25 bits, wherein the first surface number information may be 1 bit, representing a range of 0 to 1, for indicating whether the current surface is the first surface or the second surface of the optical storage medium. The first layer internal address information may be 24 bits, for example, the first layer internal address information may be represented as A 23 A 22 ...A0, indicating the range 0~CL(0~2 24 In a specific implementation, the first address information can be reflected by the waveform of the wobbling groove.

[0088] During the initialization phase of reading and writing operations on the optical storage medium, the driver in the servo system can read the first surface number information in the first wobbling groove layer and store the read first surface number information in the memory of the driver. During the reading and writing process of the optical storage medium, the first surface number information stored in the driver can be encoded into the second address information of the first recording layer. The encoded second address information may include: first surface number information, first layer number information and second layer internal address information. During the reading and writing process, read and write operations can be performed based on the encoded second address information. For example, the encoded second address information can be composed of 33 bits, wherein the second layer internal address information can be 24 bits, and the second layer internal address information can be the same as the first layer internal address information of the corresponding first sector. For example, the second layer internal address information can be represented as A23 A 22 ...A0, indicating the range 0~CL(0~2 24 The first layer number information may be 8 bits. For example, the first layer number information may be represented as A 31 A 30 A…A 24 , indicating a range of 0 to N (0 to 2 8 ), which can represent up to 256 first recording layers.

[0089] The above is an example of the representation of the first address information and the second address information. In specific implementation, the specific representation of the first address information and the second address information can be set according to actual needs, and is not limited here.

[0090] Based on the same technical concept, the present invention also provides a method for manufacturing an optical storage medium. FIG5 is a flow chart of the method for manufacturing an optical storage medium in the present invention. As shown in FIG5 , the method for manufacturing an optical storage medium in the present invention can be performed by a manufacturing device on a production line.

[0091] In the implementation of this application, the method for manufacturing the optical storage medium may include:

[0092] S201 , forming a plurality of first recording layers on a substrate, each first recording layer including a plurality of second sectors.

[0093] In an embodiment of the present application, the first recording layer may include a material that can produce a change in physical or chemical properties when subjected to an optical signal. For example, the first recording layer may include a copper (Cu) material layer and a silicon (Si) material layer. Before the optical signal is irradiated, the reflectivity of the silicon material layer is relatively high. After being subjected to the optical signal, a thermal effect is generated at the focal point of the first recording layer, causing Cu and Si to form a CuSi alloy. The CuSi alloy has a relatively high reflectivity, that is, the optical signal can cause the reflectivity of the first recording layer to change. In this way, during the data writing process, a recording light beam can be focused on the first recording layer, and the reflectivity of the first recording layer can be changed by the recording light beam, thereby writing data in the first recording layer. During the data reading process, the reflected light of the recording light beam focused on the first recording layer can be detected. By detecting the intensity of the reflected light of the recording light beam, the data stored in the first recording layer can be determined, thereby enabling the reading of the data stored in the first recording layer.

[0094] S202. Form a first wobble groove layer on the plurality of first recording layers. The first wobble groove layer includes a plurality of first sectors. The position of each first sector corresponds to the position of a second sector. The orthographic projection of the second sector on the first wobble groove layer overlaps with the first sector at the corresponding position. Each first sector carries first address information. The first address information includes first surface number information and first-layer intra-address information. The first surface number information is used to identify the first surface of the substrate, and the first-layer intra-address information is used to identify the position of the first sector in the first wobble groove layer. In practical applications, a protrusion having a shape opposite to that of the first wobble groove layer can be formed in a mold, and the mold can be injection molded to obtain the first wobble groove layer carrying the first address information.

[0095] S203: Write second address information to each of the plurality of second sectors in each first recording layer. The second address information includes first layer number information and second layer intra-address information, wherein the first layer number information indicates the layer number of the first recording layer where the second sector is located, and the second layer intra-address information indicates the position information of the second sector in the first recording layer.

[0096] Specifically, the above step S203 may include:

[0097] The guiding light beam is controlled to focus on the first wobbled groove layer, and first address information of the first sector currently focused on by the guiding light beam is determined based on the reflected light of the guiding light beam. Since the first wobbled groove layer produced in step S202 carries the first address information, the first address information of the first sector currently focused on by the guiding light beam can be obtained by detecting the reflected light of the guiding light beam and decoding the information carried by the reflected light of the guiding light beam.

[0098] The recording beam is controlled to focus on the first recording layer and synchronized with the guide beam. Because the first wobbling groove layer includes a wobbling groove for focusing and tracking, while the first recording layer does not, the recording beam is controlled to move synchronously with the guide beam. This allows the second sector focused on by the recording beam to correspond to the first sector focused on by the guide beam. Subsequently, the address information within the second layer of the second sector can be set to be the same as the address within the first layer of the corresponding first sector.

[0099] Based on the reflected light of the recording light beam, the first layer number information of the first recording layer on which the recording light beam is currently focused is determined. In a specific implementation, a four-quadrant detector can be used to detect the reflected light of the recording light beam, and the four-quadrant detector can collect signal values ​​of the four quadrants A, B, C, and D. The servo system can obtain a focus error (FE) value based on the signal values ​​of the four quadrants collected. The FE value is used to indicate whether the recording light beam is focused on the first recording layer. When the FE value is 0, it means that the recording light beam is focused on the first recording layer. When the FE value is greater than 0, it means that the recording light beam is not focused on the first recording layer. During the production process, the servo system will scan each first recording layer at the maximum range, and by controlling the movement of the lens, the recording light beam is focused on each first recording layer in turn. The first layer number information of the currently focused first recording layer can be determined by counting layer by layer.

[0100] Based on the determined first layer number information and the first address information of the first sector currently focused by the guiding light beam, the second address information of the second sector currently focused by the recording light beam is determined, and the determined second address information is written into the second sector currently focused by the recording light beam; wherein the address information in the second layer of the second sector is the same as the address information in the first layer of the corresponding first sector.

[0101] According to the above method, second address information can be written to multiple second sectors of each first recording layer. Because the second address information includes the first layer number information and the address information within the second layer, during subsequent data writing and reading processes, rapid layer positioning can be achieved based on the first layer number information of the first recording layer.

[0102] In the method for manufacturing an optical storage medium provided in an embodiment of the present application, by forming a wobble groove carrying first address information in the first wobble groove layer and writing second address information into multiple first recording layers, the set position of a first recording layer on a certain side of the optical storage medium can be quickly located during subsequent data reading and writing processes, achieving accurate and rapid data reading and writing. Furthermore, the solution of the embodiment of the present application can simplify the internal structure of the optical storage medium, reducing the difficulty and cost of the manufacturing process. This can overcome the limitations of the manufacturing process, allowing the production of more first recording layers in the optical storage medium, and further increasing the storage capacity of the optical storage medium.

[0103] Based on the same technical concept, the present invention also provides a layer-finding method for an optical storage medium. This layer-finding method can be applied to the data writing or reading process of any of the above-mentioned optical storage media. FIG6 is a flow chart of the layer-finding method for an optical storage medium in the present invention. As shown in FIG6 , the layer-finding method for an optical storage medium in the present invention may include:

[0104] S301: Control the guide beam to focus on the first wobble groove layer, and control the recording beam synchronized with the guide beam to randomly focus on a first recording layer. In a specific implementation, the guide beam can be controlled to focus on a first sector in the first wobble groove layer, so that the recording beam is focused on a second sector corresponding to the first sector.

[0105] S302: Determine, based on the reflected light of the recording beam, first layer number information of a first recording layer currently focused by the recording beam. Specifically, based on the reflected light of the recording beam, second address information carried by a second sector focused by the recording beam can be determined, and based on the second address information, the first layer number information of the current first recording layer can be determined.

[0106] S303, determining distance information between the first recording layer and the target recording layer according to the first layer number information of the first recording layer and the layer number information of the target recording layer; wherein the target recording layer is the first recording layer to be read or written;

[0107] S304: Control the movement of the recording beam according to the determined distance information so that the recording beam is focused on the target recording layer. In the process of controlling the movement of the recording beam, the distance information may be counted layer by layer to move the recording beam to the target recording layer.

[0108] For example, consider an optical storage medium with a first wobble groove layer and ten first recording layers on its first surface, with the target recording layer being the fifth first recording layer. In related art techniques, the recording beam is controlled to first locate the first wobble groove layer, then controlled to move from the first wobble groove layer toward each first recording layer, counting layer by layer until it reaches the fifth first recording layer. This layer-seeking method in related art seeks layers sequentially through each first recording layer, resulting in slow layer-seeking speed and a high probability of layer-seeking errors. In the layer-seeking method of the present embodiment, the recording beam is controlled to randomly focus on a first recording layer. Based on the reflected light of the recording beam, the first layer number information of the current first recording layer can be obtained, e.g., the current first recording layer is the third first recording layer. The recording beam is then controlled to move two first recording layers, allowing it to focus on the fifth first recording layer. Compared to related art layer-seeking methods, the layer-seeking method provided in the present embodiment can achieve layer-seeking based on the first layer number information of the first recording layer, shortening the distance the recording beam travels and accelerating layer-seeking speed. Since the distance the recording light beam moves is shorter, the possibility of layer seeking errors is smaller, which improves the reliability of layer seeking.

[0109] In addition, after the above step S304, the following steps may also be included:

[0110] re-determining first layer number information of the first recording layer on which the recording beam is focused based on the reflected light of the recording beam;

[0111] Based on the determined first layer number information of the first recording layer, it is determined whether the first recording layer on which the recording light beam is focused is the target recording layer; if the first recording layer on which the recording light beam is currently focused is not the target recording layer, the distance information between the first recording layer and the target recording layer is re-determined, and the movement of the recording light beam is controlled according to the determined distance information until the recording light beam is focused on the target recording layer.

[0112] In the embodiment of the present application, whether the currently focused first recording layer is the target recording layer can be verified based on the first layer number information of the first recording layer, thereby further improving the reliability of layer seeking.

[0113] Based on the same technical concept, embodiments of the present application also provide a layer-finding device for an optical storage medium. The layer-finding device in embodiments of the present application can be a data writing device for the optical storage medium, or a data reading device for the optical storage medium, or a reading and writing device for the optical storage medium. For example, the layer-finding device in embodiments of the present application can be an optical drive.

[0114] FIG7 is a schematic structural diagram of a layer-finding device for an optical storage medium according to an embodiment of the present application. As shown in FIG7 , the layer-finding device for an optical storage medium according to an embodiment of the present application may include: a servo driver 401 for controlling the guide beam to focus on the first wobbling groove layer, and controlling the recording beam synchronized with the guide beam to focus on a first recording layer; a processor 402 for determining, based on reflected light from the recording beam, the first layer number information of the first recording layer on which the recording beam is currently focused; and determining, based on the first layer number information of the first recording layer and the layer number information of the target recording layer, the distance information between the first recording layer and the target recording layer, wherein the target recording layer is the recording layer to be read or written. The servo driver 401 is further configured to control the movement of the recording beam according to the determined distance information so that the recording beam is focused on the target recording layer.

[0115] Furthermore, in some embodiments of the present application, the processor 402 may also be configured to: after the servo driver controls the movement of the recording beam according to the determined distance information so that the recording beam is focused on the target recording layer, re-determine the first layer number information of the first recording layer on which the recording beam is focused based on the reflected light of the recording beam; and determine, based on the determined layer number information of the first recording layer, whether the first recording layer currently focused on by the recording beam is the target recording layer; if the first recording layer on which the recording beam is focused is not the target recording layer, re-determine the distance information between the first recording layer and the target recording layer, and control the servo driver to control the movement of the recording beam according to the determined distance information until the recording beam is focused on the target recording layer.

[0116] In the layer-finding device provided in an embodiment of the present application, a servo driver can control the recording light beam to randomly focus on a first recording layer. A processor can obtain the first layer number information of the current first recording layer based on the reflected light of the recording light beam, and determine the distance information between the current first recording layer and the target recording layer. This allows the servo driver to control the movement of the recording light beam based on the determined distance information so that the recording light beam focuses on the target recording layer. In this way, layer-finding can be achieved based on the first layer number information of the first recording layer, shortening the distance traveled by the recording light beam and accelerating the layer-finding speed. Because the recording light beam travels a shorter distance, the likelihood of layer-finding errors is reduced, thereby improving the reliability of layer-finding. Furthermore, the processor can verify whether the currently focused first recording layer is the target recording layer based on the first layer number information of the first recording layer, further improving the reliability of layer-finding.

[0117] Based on the same technical concept, embodiments of the present application also provide an electronic device, which may include any of the aforementioned layer-finding devices and a housing, wherein the layer-finding device is located within the housing. For example, the electronic device may be a laptop computer, desktop computer, server, or other device equipped with a layer-finding device. Because the aforementioned layer-finding device can rapidly find the layer of an optical storage medium with high reliability, the electronic device including the aforementioned layer-finding device can achieve rapid reading and writing of the optical storage medium.

[0118] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0119] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include such modifications and variations.

Claims

1. An optical storage medium, characterized in that: include: A first surface and a second surface disposed opposite to each other, and a first wobble groove layer and a multi-layer first recording layer disposed between the first surface and the second surface, wherein the multi-layer first recording layer is located between the first wobble groove layer and the first surface; The first wobble groove layer includes a plurality of first sectors, each of which carries first address information, and the first address information includes: first surface number information and first layer internal address information; the first surface number information is used to characterize the first surface, and the first layer internal address information is used to characterize position information of the first sector in the first wobble groove layer; Each of the first recording layers includes a plurality of second sectors, the position of each of the second sectors corresponds to the position of one of the first sectors, and the orthographic projection of the second sector on the first wobbled groove layer has an overlapping area with the first sector at the corresponding position; Each of the second sectors carries second address information, and the second address information includes: first layer number information and second layer address information, the first layer number information is used to represent the layer number of the first recording layer where the second sector is located, and the second layer address information is used to represent the position information of the second sector in the first recording layer.

2. The optical storage medium according to claim 1, wherein The second-layer address information of the second sector is the same as the first-layer address information of the first sector at the corresponding position.

3. The optical storage medium according to claim 1 or 2, characterized in that: The optical storage medium is a ring-shaped optical disc; The first sector includes: a first data servo area, a first lead-in area, a first user data area and a first lead-out area arranged in sequence from the inner circle to the outer circle of the optical disc; the first data servo area carries the first address information; The second sector includes: a second data servo area, a second lead-in area, a second user data area and a second lead-out area which are sequentially arranged in a direction from the inner circle to the outer circle of the optical disc; the second data servo area carries the second address information.

4. The optical storage medium according to any one of claims 1 to 3, characterized in that: Also includes: a second wobble groove layer and a multi-layer second recording layer located between the first wobble groove layer and the second surface, the multi-layer second recording layer being located between the second wobble groove and the second surface; The second wobble groove layer includes a plurality of third sectors, each of the third sectors carries third address information; The third address information includes: second surface number information and third layer internal address information; the second surface number information is used to characterize the second surface, and the third layer internal address information is used to characterize the position information of the third sector in the second wobble groove layer; Each of the second recording layers includes a plurality of fourth sectors, each of the fourth sectors is located at a position corresponding to a position of the third sector, and an orthographic projection of the fourth sector on the second wobbled groove layer has an overlapping area with the third sector at a corresponding position; Each of the fourth sectors carries fourth address information, and the fourth address information includes: the second layer number information and the address information within the fourth layer, the second layer number information is used to represent the layer number of the second recording layer where the fourth sector is located, and the address information within the fourth layer is used to represent the position information of the fourth sector in the second recording layer.

5. A method for manufacturing an optical storage medium, characterized in that: include: forming a plurality of first recording layers on a substrate, each of the first recording layers comprising a plurality of second sectors; forming a first wobble groove layer on the plurality of first recording layers, wherein the first wobble groove layer comprises a plurality of first sectors, the position of each first sector corresponds to the position of one second sector, and the orthographic projection of the second sector on the first wobble groove layer has an overlapping area with the first sector at the corresponding position; Each of the first sectors carries first address information, the first address information including: first surface number information and first layer address information; the first surface number information is used to characterize the first surface of the substrate, and the first layer address information is used to characterize the position information of the first sector in the first wobble groove layer; Second address information is written to each of the multiple second sectors of the first recording layer; the second address information includes: first layer number information and second layer address information, the first layer number information is used to represent the layer number of the first recording layer where the second sector is located, and the second layer address information is used to represent the position information of the second sector in the first recording layer.

6. The method according to claim 5, characterized in that: Writing the second address information to the plurality of second sectors of each first recording layer respectively comprises: Controlling the guide light beam to focus on the first wobble groove layer, and determining the first address information of the first sector on which the guide light beam is currently focused according to the reflected light of the guide light beam; Controlling the recording beam to focus on the first recording layer, and controlling the recording beam to be synchronized with the guide beam; determining, according to the reflected light of the recording light beam, first layer number information of the first recording layer on which the recording light beam is currently focused; According to the determined first layer number information and the first address information of the first sector on which the guide light beam is currently focused, Determine the second address information of the second sector on which the recording beam is currently focused, and write the determined second address information into the second sector on which the recording beam is currently focused; wherein the second-layer address information of the second sector is the same as the first-layer address information of the corresponding first sector.

7. A layer-finding method for an optical storage medium, characterized in that: The layer-finding method is applied to the optical storage medium according to any one of claims 1 to 4; the layer-finding method comprises: Controlling the guide beam to focus on the first wobbled groove layer, and controlling the recording beam synchronized with the guide beam to focus on one layer of the first recording layer; determining, according to the reflected light of the recording light beam, first layer number information of the first recording layer on which the recording light beam is currently focused; Determine the distance information between the first recording layer and the target recording layer according to the first layer number information of the first recording layer and the layer number information of the target recording layer; the target recording layer is the first recording layer to be read and written; The recording beam is controlled to move according to the determined distance information so that the recording beam is focused on the target recording layer.

8. The layer-finding method according to claim 7, characterized in that: After controlling the movement of the recording light beam according to the determined distance information so that the recording light beam is focused on the target recording layer, the method further includes: determining again, according to the reflected light of the recording light beam, the first layer number information of the first recording layer on which the recording light beam is focused; Based on the determined first layer number information of the first recording layer, determine whether the first recording layer on which the recording light beam is focused is the target recording layer; if the first recording layer on which the recording light beam is currently focused is not the target recording layer, redetermine the distance information between the first recording layer and the target recording layer, and control the movement of the recording light beam based on the determined distance information until the recording light beam is focused on the target recording layer.

9. A layer-finding device for an optical storage medium, characterized in that: The optical storage medium as claimed in any one of claims 1 to 4 comprises: A servo driver, used for controlling the guide beam to focus on the first wobble groove layer, and controlling the recording beam synchronized with the guide beam to focus on one layer of the first recording layer; a processor, configured to determine, based on the reflected light of the recording light beam, first layer number information of the first recording layer on which the recording light beam is currently focused; and to determine, based on the first layer number information of the first recording layer and layer number information of the target recording layer, distance information between the first recording layer and the target recording layer; the target recording layer is the recording layer to be read or written; The servo driver is further used to control the movement of the recording light beam according to the determined distance information so that the recording light beam is focused on the target recording layer.

10. The layer-finding device according to claim 9, characterized in that: The processor is further configured to: after the servo driver controls the recording light beam to move according to the determined distance information so that the recording light beam is focused on the target recording layer, determine again the first layer number information of the first recording layer on which the recording light beam is focused according to the reflected light of the recording light beam; Based on the determined first layer number information of the first recording layer, determine whether the first recording layer currently focused by the recording light beam is the target recording layer; if the first recording layer focused by the recording light beam is not the target recording layer, redetermine the distance information between the first recording layer and the target recording layer, and control the servo driver to control the movement of the recording light beam according to the determined distance information until the recording light beam is focused on the target recording layer.

11. An electronic device, characterized in that: include: A layer-finding device as claimed in claim 9 or 10.

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