JP3125915U - Embossed write-once multi-optical storage media structure - Google Patents

Abstract

Provided is an embossed write-once multi-optical storage media structure capable of reducing the manufacturing cost and improving the efficiency of the manufacturing process by simplifying the manufacturing process.
An embossed write-once multi-optical storage media structure is posted, and a recording layer having a predetermined refractive index is formed on the lower substrate by engraving a nick of a predetermined depth. Further, this recording layer is covered with a reflective layer, and finally the upper substrate and the lower substrate are brought into close contact with each other to protect each layer structure therein. Data is recorded by different laser light sources.
[Selection] Figure 2c

Description

  The present invention relates to a write-once multi-optical storage medium structure, and more particularly to an embossed write-once multi-optical storage medium.

The reason for the first research and development in the development of digital multi-optical storage media has been applied to home digital video, but as the product functions continue to evolve, digital multi-optical storage media also vary. The structure and characteristics have been developed, and can be classified into three main categories: read-only storage media, write-once storage media, and rewritable storage media. Among them, read-only storage media that are often seen are storage media-ROM, and write-once storage media that are often seen are storage media-R, storage media + R, and the like. On the other hand, common rewritable storage media are storage media-RW, storage media + RW, storage media-RAM, and the like. The applicable range of each type is different, each storage medium has its own standard, and the manufacturing process is all different. However, since all storage media record data to the storage media using the photo-reaction method, the storage media manufacturer, the type of storage media, and data storage are stored in the recording area. Control data such as the possible capacity, the lading method, etc. must be defined, so that when recording data on a certain type of storage media, disc information about the lating device can be provided, so that the writing disc The body can accurately identify the disc and improve the quality of the rat.
Taking a commonly used write once storage medium as an example, referring to FIGS. 1 (a), 1 (b), and 1 (c) at the same time, each of them outlines a partial structure of a conventional write once storage medium. FIG. 1 is a schematic diagram of a recording layer structure and a schematic cross-sectional view of the whole, and FIG. 1B is a schematic diagram showing an enlargement of the structure of area A in FIG. The recording layer 12 includes a plurality of grooves 181 and lands 182, and the groove 181 includes a normal data storage area 18. Alternatively, the control data storage area 18 ′ is used as an example. For example, in the groove 181 storing a plurality of ordinary data storage areas 18, a plurality of control data storage areas 18 ′ are embossed by a laser and controlled therein. De Data in data storage Ward 18 'is recorded in Storr ridge media, can use the data necessary for reading. However, the conventional method of embossing with the laser 40 is that if the manufacturer is mass-produced, the energy consumption of the laser is fast and large by producing continuously, increasing the cost burden and producing. Since one process step is added, one defect is added to the overall production efficiency. For this reason, the method of embossing the neck using a laser is not an ideal production method from a long-term perspective.

  In view of these problems, the present invention provides an embossed write-once, multi-optical storage medium for the above-mentioned problems, and forms a lower substrate having a neck by using a lower substrate body in which the emboss has a neck. Therefore, after the write-once storage media has completed the manufacturing process, it is not necessary to write again with a laser to form a nick, thereby solving the conventional problem.

  The main object of the present invention is to provide an embossed write-once type multi-optical storage media structure, with a lower substrate engraved with a predetermined depth as a base, and a recording layer covering the lower substrate. Since it is not necessary to directly mark on the recording layer and again engrave the recording layer with a laser, the manufacturing cost can be reduced and the efficiency of the manufacturing process can be improved.

  Another object of the present invention is to form a neck directly on the lower substrate by a spin coating method by having a recording layer having a predetermined refractive index in a multi-optical storage media structure of embossed write-once type, Since it is not necessary to newly increase the manufacturing process, the manufacturing burden is not increased and the efficiency of the manufacturing process is not adversely affected.

  Therefore, the embossed write-once type multi-optical storage media structure of the present invention includes a lower substrate, which has a plurality of grooves of a predetermined depth, and has a special recording layer on the lower substrate. A plurality of inks for recording control data are directly formed, and a reflective layer is formed on the recording layer to reflect a recording laser and to the uppermost layer. Has a smooth upper substrate covering the inner surface, and closely adheres to the lower substrate to protect the special recording layer and the reflective layer therein, thereby increasing the mechanical strength of the overall structure. Therefore, the write-once storage media of the present invention can be used for the module design without being engraved with a laser, so that not only can be easily engraved, but also the production cost can be reduced and the production can be reduced. By simplifying the process, the efficiency of the manufacturing process can be improved.

  In order to make the purpose, technical contents, features, and effects of the present invention easier to understand, specific examples and drawings are described in detail below.

  In order to improve the quality of storage media writing, generally the basic control data required when recording data is usually first recorded on the embossing neck, so that embossing for the write-once media structure is particularly targeted in the current market. All of the Neck have a structure that forms an embossed Neck using the laser light of the subsequent manufacturing process. However, the write once media structure formed by this type of method requires a considerable manufacturing cost. At the same time, since the problem of relatively low yield is encountered, in view of these, the present invention provides an embossed write-once type multi-optical storage media structure and solves the above-mentioned problems. The technical spirit of the present invention will be described in detail below.

  The present invention is an embossed write-once type multi-optical storage media structure, and referring to FIG. 2 (a), FIG. 2 (b), and FIG. Schematic diagram of the appearance of the ridge media, schematic diagram of the recording layer structure and schematic diagram of the entire structure, and FIG. 2 (b) is a schematic diagram showing an enlargement of the structure of the B area in FIG. 2 (a), This embossed write-once type multi-optical storage media structure includes a lower substrate 20, a recording layer 22, a reflective layer 24, and an upper substrate 26, in which a portion near the center of the storage media is annular. The control data recording section 28 'has a plurality of embossed necks 282. The data in the control data recording section 28' is recorded and used for data necessary for reading. Adjacent to the ink jet 282 is used to record a plurality of non-control data grooves 281 in the normal data recording area 28. When different laser light sources 50 are applied, the above embossed ink 282 is different. In the case of a recording light source with a depth design and control data of a red laser with a wavelength of 650 nanometers, the depth of these embossed neckties 28 is between 100 and 170 nanometers and the wavelength is In the case of a recording light source with a 450 nanometer blue laser as control data, the depth of these embossed necks 28 is between 40 and 85. Therefore, the lower substrate 20 is covered with the recording layer 22, and the recording layer 22 has an area having a specific refraction coefficient, and the lower substrate 20 and the recording layer 22 that can store the embossed neck 282 are formed there. In the process of spin coating, the refractive index of the dyed layer that is more closely adhered and preferred has a direct relationship with the laser light source 50 to be used. For example, under the condition that a red laser with a wavelength of 650 nanometers is used as the recording light source, the refractive index of the preferred recording layer is between 1.7 and 2.3 nanometers, while a blue laser with a wavelength of 405 nanometers is used as the recording light source. Under these conditions, the refractive index of the preferred recording layer is between 1.1 and 1.7 nanometers. The recording layer is covered with a reflective layer 24, and this reflective layer 24 is usually made of silver or an alloy. Finally, in order to bring the upper substrate 26 and the lower substrate 20 into close contact with each other, the recording layer 22 and the reflective layer therein are wrapped and protected, and have an action of improving the isolation and the mechanical strength of the structure.

  The material of the lower substrate and upper substrate described above is most commonly carbonated fat, and the lower substrate is formed by a metal plate of embossed nickel, which is used repeatedly. Since it is possible, the manufacturing cost of the write-once storage media can be reduced. In general, the thickness of the lower substrate and the thickness of the upper substrate are the same. In this example, both the thickness of the lower substrate and the thickness of the upper substrate are 0.6 mm.

  Based on the above, a part of the experimental data is shown below to prove the range of the ideal refractive index area and the ideal embossing depth of the embossing described in the present invention.

After the recording layer is formed on the lower substrate by the spin coating method, different recording materials have different refraction coefficients, so that different levels of optical noise effects occur. In order to confirm that different recording materials produce different optical noise effects with different recording light sources, tests were performed using recording materials with different refractive indices. As shown in Table 1, a red laser having a wavelength of 650 nanometers is used as a recording light source. Among them, recording material A, recording material B, recording material C, and recording material D have refractions of 2.487, 2.452, 2.193, and 1,966, respectively. It is a coefficient, and the jitter rate (DC ・ Jitter) obtained from the collected data is 20.75%, 16.08%, 8.5%, 12.04%, respectively, under the condition that the depth of embossing is 160 nanometers. Therefore, it can be said that the relatively preferable recording materials are the recording material C and the recording material D. Therefore, the refractive index of the relatively preferable recording layer which has been clarified as a result of the test is between 1.96 and 2.19. It meets the ideal refractive index area between 1.7 and 2.3.

Now that a relatively favorable range of refractive index has been found, the possible depth range indicated by the embossed nick depth described above is between 100 and 170 nanometers, and a red laser with a wavelength of 650 nanometers as well. In the test of the most preferable depth of embossing under the condition that the recording light source is a recording light source, recording material A, recording material B, recording material C, and recording material D are different depths of embossing. In this case, the optical density of a specific recording layer is defined as the jitter rate at which the data is collected, and it is found that the preferable range is 120 to 160 nanometers within the preferable embossing depth range, as shown in FIG. In addition, the data shown mainly consist of comparatively preferable recording materials C and D, and are part of experimental data of recording materials A and B which are not ideal when compared. However, the data in Table 2 is not limited to the recording materials C and D that are relatively ideal, and not only for the recording materials A and B that are considered to be relatively not ideal. All appear in a relatively preferred embossing neck depth of 120 to 160 nanometers, and the collected data of any recording material has a relatively low jitter rate. Taking recording materials C and D as an example, The jitter rate obtained from the collected data is between 8.5% and 16.53% when the Neck is between 120 and 160 nanometers, and at the same time the results of Table 1 corresponding to the data in Table 2 again, Even if the embossing depth is the same, the jitter rate obtained from the data collected from the recording materials C and D is higher than the jitter rate of the data obtained from the recording materials A and B. clear Low. In addition to this, when the most preferred emboss neck depth is designed to fit a relatively ideal recording layer condition, if you want to control factors such as the optical density of the recording layer, you can get Ridge media has a good focus effect and a normal barrel effect.

In addition, the embossed write-once multi-optical storage media structure of the present invention can also be used for a blue laser with a light source of 405 nanometers, however, because the wavelength of the light source acting on the recording layer is different, Therefore, an appropriate recording material is selected, and the recording material applied to the red laser having the wavelength of 650 nanometers is not necessarily the same. The following are examples of the recording material D, the recording material E, and the recording material F described above. As shown in Table 3, as shown in Table 3, at the depth of embossing fixed for recording material D, recording material E, and recording material F, different minimum collected data that can obtain a blue laser with a wavelength of 405 nanometers The recording material D, the recording material E, and the recording material have the refraction coefficients of 1.401, 1.412, and 1,289, respectively, and the embossing depth is Under the conditions between 60 and 63 nanometers, the collected data has a jitter rate of 6.2%, 7.6%, and 6.6%, respectively, and the relatively preferred recording materials are recording material D and recording material F. As a result, a relatively preferable refractive index of the recording layer appears between 1.289 and 1.40, and it surely fits between 1.1 and 1.7, which is an ideal refractive index area according to the present invention.

Since a relatively preferred range of refractive index has been found, the preferred depth range from the embossed nick depth described above is between 40 and 85 nanometers, among which a relatively preferred recording material D is used. As shown in Table 4 below, the embossed neck has a target range between 50 and 73 nanometers and the wavelength is 405 nanometers, as shown in Table 4 below. The jitter rate of the collected data obtained using a laser as a light source appears between 6.2% and 8.1%. As can be seen from these data, when the recording material with the preferred refractive index of the recording material is selected and applied, Depth is performed between 50 and 73 nanometers under blue laser light source, where the ideal embossed neck depth area of the present invention is certainly 40 to 85 Fits between Roh meters.

  Embossed write-once multi-optical storage media structure according to the present invention is, for example, red laser DVD-R, one-layer blue laser HDDVD-R, double-layer blue laser HDDVD-R, blue laser BD- It can be applied to different fields of related multi-storage media structures such as R, and the structures of the above-mentioned one-layer and double-layer blue laser HDDVD-R are as shown in FIG. 3 and FIG. FIG. 3 is a cross-sectional view showing a one-layer blue laser HDDVD-R, which is a storage media structure having a single recording layer shape, and therefore has a single-layer structure 38 on one surface of the recording layer 32. In addition, a blue laser HDDVD-R having a double layer structure shown in FIG. 4 has a groove 381 for recording ordinary data and an embossed neck 382. As seen from the cross-sectional view shown, it is a storage media structure having a double recording layer shape, so that one surface of the recording layer 32 has a first one-layer structure 38 and is used for recording ordinary data. A second one-layer structure 39 having a groove 381 and an embossed neck 382 and having a lead-out 391 on the other surface of the recording layer 32 is formed. As described in the previous paragraph, the lower substrate 30 and the upper substrate 36 in these multi-storage media structures generally have the same thickness, and in this embodiment the lower substrate has a thickness of 0.6 millimeters. 30 and the upper substrate 36 are adopted.

  Therefore, the embossed write-once type multi-optical storage media structure of the present invention is a structure that embosses the embossed net structure on the lower substrate through the conventional laser. Can be used in place of the laser, not only does not need to use a laser, but also can reduce the cost of laser embossing, thus simplifying the manufacturing process, thus increasing work efficiency and manufacturing Lower costs and increase the competitiveness of write-once storage media.

  What has been described above is a description of the features of the present invention using the embodiments, and the purpose thereof is to allow a skilled engineer to understand and implement the contents of the present invention without limiting the patent scope of the present invention. Therefore, all equivalent modifications and changes applied without departing from the spirit of the present invention belong to the scope of the present invention described below.

It is the schematic which shows the external appearance of the conventional write-once storage medium. It is the schematic which shows the recording layer structure of the conventional write-once storage medium. It is the schematic which shows the cross section of the whole conventional write once storage medium. It is the schematic which shows the external appearance of the embossed write-once type multi optical storage medium of this invention. It is the schematic which shows the recording layer structure of the embossed write-once storage medium of this invention. It is the schematic which shows the cross section of the whole embossed write-once preservation medium of this invention. Sectional drawing which shows the blue laser HDDVD- of the one layer structure of this invention. Sectional drawing which shows the blue laser HDDVD- of the double layer structure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lower substrate 12 Recording layer 14 Reflective layer 16 Upper substrate 18 Normal data storage area 18 'Data control storage area 181 Groove 182 Land 20 Lower substrate 22 Recording layer 24 Reflective layer 26 Upper substrate 28 Normal data recording area 28' Data control Storage area 281 Groove 282 Embossed neck 30 Lower substrate 32 Recording layer 36 Upper substrate 38 First one-layer structure 381 Groove 382 Embossed neck 39 Second one-layer structure 391 Lead-out
40 Laser beam 50 Laser beam

Claims (14)

In the embossed light once type multi-optical storage media structure,
A lower substrate having a plurality of necks;
A recording layer formed on the lower substrate, covering these nicks, and storing data by a plurality of grooves;
A reflective layer that is formed on the recording layer and is used as a light source required in the case of a reflection rate, and in which the grooves in the recording layer have a sufficient energy and perform a photochemical reaction;
An embossed write-once type comprising an upper substrate formed on the reflective layer, closely contacting the lower substrate, protecting the recording layer and preventing the reflective layer from being scratched Multi-optical storage media structure. 2. The embossing type according to claim 1, wherein each of these recordings records a plurality of control data, and the control data is one of a disc type, manufacturer information, a rat capacity, or a rat method. Write-once multi-optical storage media structure. 2. The embossed write-once multi-optical storage media structure according to claim 1, wherein the lower substrate is formed of a metal template engraved with the neck. 2. The embossed write-once multi-optical storage media structure according to claim 1, wherein the material of the lower substrate is polycarbonate. The embossed write-once multi-optical storage media structure according to claim 1, wherein the material of the upper substrate is polycarbonate. 2. The embossed write-once multi-optical system according to claim 1, wherein the depth of the neck is between 100 and 170 nanometers under a condition that a red laser having a wavelength of 650 nanometers is used as a light source. Storage media structure. 7. The embossed write-once multi-optical storage media structure of claim 6, wherein the depth of the neck is optimally between 120 and 160 nanometers. 2. The embossed write-once multi-optical system according to claim 1, wherein the depth of the neck is between 40 and 85 nanometers under the condition that a blue laser having a wavelength of 450 nanometers is used as a light source. Storage media structure. 2. The embossed write-once multi-optical storage media structure according to claim 1, wherein the recording layer is a write-once type. 2. The embossed write-once multi-optical storage media structure according to claim 1, wherein the material of the recording layer is either an organic material or an inorganic material. 2. The embossed write-once multi-optical stove according to claim 1, wherein a refractive index of the recording layer is between 1.7 and 2.3 under a condition where a red laser having a wavelength of 650 nanometers is used as a light source. Ridge media structure. 2. The embossed write-once multi-optical stove according to claim 1, wherein a refractive index of the recording layer is between 1.1 and 1.7 under a condition where a blue laser having a wavelength of 450 nanometers is used as a light source. Ridge media structure. 2. The embossed write-once multi-optical storage media structure according to claim 1, wherein the recording layer is spin-coated. 2. The embossed write-once multi-optical storage media structure according to claim 1, wherein the recording layer is made of either silver or a silver alloy.