TW556188B - Manufacturing method for compact disk - Google Patents

Abstract

The present invention provides a manufacturing method for compact disk having several signal recording portions on single side without influencing the characteristics of recording and regeneration of signals, which includes the following steps: configuring a reflective second signal recording portion 32 on a support substrate 31 made of synthetic resin transferred with specific ragged patterns; forming a semi-transmissive first signal recording portion 42 on the substrate 41 made of synthetic resin transferred with specific ragged patterns; conducting the recordable data initialization on the reflective second signal recording portion 32 and semi-transmissive first signal recording portion 42; then, overlapping the semi-transmissive first signal recording portion after initialization on the reflective second signal recording portion to form several signal recording portions 32, 42 on the support substrate 31.

Description

1 5. Description of the invention (Fang ^ Invention Department. For example, the manufacture of optical discs used for high-density information recording media has previously been classified as 'different two s-plane recordings according to their information recording methods' and divided according to the number of recording layers. There are two types of single-layer or double-layer, such as single-sided single-layer and single-layer types. Layers on both sides of the early layer and both sides Figure 9 shows a kind of optical disc structure that forms a double-layer signal recording unit on one side. The surface (upper surface) of the disc-shaped support substrate 2 containing a transparent synthetic resin such as polycarbonate is formed with a specific concave-convex shape. A second signal recording portion 5 constituting a recordable reflective film is formed on the optical confirmation substrate 2, A semi-transmissive first signal recording portion 7 is provided through a transparent intermediate layer 6 ', and a transparent protective layer 8 is provided on the surface. In addition, a center hole 3 for clamping is provided in the center of the optical disc 1 ^ When reading and writing information to a single-face frosted disc of this structure, the optical pickup shown in Fig. 10 is used. The optical pickup 10 shown in Fig. 10 includes a laser that generates a specific laser light. Light source 11 such as a diode; will be emitted from the light source 11 A collimating lens 12 whose lines are converted into parallel light; a parallel light emitted from the collimating lens 12 is incident on a refractive lens 13 as a refractive mechanism (light separation means); and a light emitted from the refractive lens 13 is incident on a condenser To the objective lens 14 4. From the objective lens 14, the light collected on the first signal recording portion 7 or the second signal recording portion 5 of the optical disc 1 is reflected by the signal recording portion and returned. The light is incident on the refraction mirror 1 3 again, and is reflected by the semi-transmissive reflecting film 13 a provided on the refraction mirror 13 at an angle of about 45 degrees. The optical pickup 10 includes: reflecting the refraction mirror 13. A condenser lens 5 for condensing the light beam; and a photodetector 16 for the return light collected by the condenser lens 15 to enter. In addition, 'the objective lens 14 is driven along the optical disc by an actuator not shown in the figure. The tracking servo mechanism that moves in the direction of the path is controlled by the focusing servo mechanism that is close to or away from the optical disc. Thus, on the optical disc 1, the operation of the optical pickup 10 is modulated to increase the output of the light source 11. Laser light in the first signal recording section 7 or the second signal The information is recorded in the recording section 5, and the output of the light source 丨 丨 is increased, so that it is focused on the first signal recording section 7 or the second recording section 5, and the light is read back by the light detector 16 to reproduce the information. The rhyme solved by the invention However, if such a single-sided double-layer disc uses the structure shown in FIG. 9, in order to record the first signal recording section 7 and the second signal recording section 5 as described above, there are as follows An important issue in manufacturing. = That is, the effective structure of the first signal recording section 7 and the second signal recording section 5 that can be used to record or rewrite an optical disc is that each recording section requires a phase-change type recording layer. Specifically, the signal recording unit is a composite layer including a dielectric, a phase change recording layer, a metal reflective film, and the like, and obtains a reproduced signal corresponding to a change in the state of the phase change recording green layer. That is, depending on whether the phase change type recording layer is in a crystalline state or an amorphous state, the optical constant is designed to be changed, and the reflectance of the light beam for reproduction is different. B7 B7 3 V. Description of the invention (that is, when performing information recording, the light beam suitable for recording is focused on the phase-change recording layer to give high energy, and the green material is melted and quenched: it becomes amorphous The recording symbol of the state. For the heavy material, it is to irradiate the light beam with lower output than the redundant material. 'Detect the difference between the reflected light quantity of the recording symbol and the surrounding crystalline area and generate a reproduced signal. In the case of forming the = signal recording section 5 in FIG. 9, it is necessary to form a specific phase change type recording material, a dielectric, etc. on the support substrate 2 formed with the unevenness formed by the guide groove of the groove. The film-forming state is such that the phase-change recording layer is in an as-deposited amorphous state. Therefore, after the phase-change recording layer is formed, it is necessary to perform the formation of a crystalline state. Information can be recorded on the initialization operation. A general initialization operation is performed by using the same device as that of the optical pickup 10 shown in FIG. 10. FIG. 11 is a schematic diagram for explaining the initialization state. The picture shows that the light beam emitted from the light source u passes through the protective layer 8 (not shown) on the optical disc 1 and is focused on the first # element recording section 7. The objective lens 14 is focused and controlled to form a light spot SP1. The light spot SP1 is actually an elongated light spot formed by a width of about 1 // m in the tracking direction of the optical disc 1 and a length of about 50 to 200 / zm in the radial direction as shown in FIG. In the state where the light spots SP1 are gathered, the optical disc 1 is rotated, and the light spot SP1 is moved only in a radial direction at a specific distance equivalent to each rotation of the optical disc 1 to control the movement amount of the objective lens 14. The light spot SP1 is spiral The shape moves on the first recording layer 7. At this time, by appropriately adjusting the light source 11 (see -6- this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 556188 A7

According to the energy of FIG. 10) and the scanning speed on the recording layer of the light spot SP1, the state of the recording layer of the first signal recording portion 7 is similar to the deposited amorphous state, and thus the crystalline state can be changed. At this time, as shown in FIG. 11, since the first signal recording green portion 5 is located at the light source end, in order to make the light from the objective lens 14 reach the inner second signal recording portion 5, it is necessary to avoid the semi-transmission of the metal reflection film as much as possible. membrane. Therefore, in the above initialization operation, in addition to forming the light spot spi on the first signal recording section 7, the light beam L condensed through the objective lens 14 passes through the first recording section 7. A light spot SP2 is formed by reaching the second signal recording portion 5 on the inner side, and the light beam L is reflected by the metal reflection film of the second signal recording portion 5 and returns to the first signal recording portion 7 to be formed by the diffused light beam. Light spot SP3. Thereby, the intensity of the first signal recording section 7 is suddenly stronger or weaker due to interference with the light spot SP1 formed by the collected light of the objective lens 14 and the light spot SP3 formed by the returned light, and the phase difference between the collected light and the returned light. However, when the phase-change recording layer originally changed the intensity of light by 5%, the recording and reproducing signal characteristics of the medium changed. As shown in FIG. 12, when the light amount of the overlapping area of SP1 and SP1 in the light spot SP3 is 1% of the light amount of SP1, the light intensity on the first signal recording section 7 varies by ± 20% from the light intensity of SP1. The manufacturing method cannot produce an optical disc 1 with complete recording and reproduction signal characteristics. In order to solve the above problems, the object of the present invention is to provide a signal recording section having a plurality of signal recording sections on one or both sides without affecting the recording and reproduction signal characteristics. Manufacturing method of optical disc. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 5 B7 Description of the invention

The manufacturing method of the optical disc of the present invention has the following steps: firstly, providing a first signal recording unit including a phase-change type green layer in step 2 of transferring a specific uneven pattern on the second substrate; and placing the second substrate on the uneven pattern A step-by-step including a second recording section of the photo recording section; and a step-hui that makes the first-signal recording section, ㈣ and the ^ signal recording section relatively closely matched; characterized by: The relative bonding step of the signal recording section: 'the initialization steps of the recordable information are performed on the first signal recording section and the second signal recording section, respectively. In addition, after the above-mentioned first signal recording section and the second signal recording section are attached to the manufacturer of the above-mentioned optical disc, it is also preferable that: the first substrate is peeled from the first signal recording section; and A step of providing a protective layer containing a transparent material on the recording section. In addition, the first substrate should preferably include an acrylic resin β σ. In addition, the method for manufacturing the optical disc should preferably include the first signal recording before the first signal recording section and the second signal recording section are bonded together. A step of laminating a transparent film on the part; and a step of peeling the first substrate from the first signal recording part. In addition, 'the manufacturing method of the above-mentioned optical disc, it is preferable to use a stamping die having a concave-convex pattern corresponding to the grooves to form the first substrate, and to use a stamped film having the same pattern as the concave-convex pattern and different rotation directions to form the first substrate. The above-mentioned second substrate is formed. Embodiments of the Invention Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. — -8-This paper size is suitable for S ® Home Standard (CNS) A4 size (210 X 297 mm) 556188 A7 _____B7 V. Description of the invention (6) In addition, the embodiments described below are specific to the invention. Although the examples are technically appropriately limited, the scope of the present invention is not limited to these aspects in the following description, as long as the content of the present invention is not specifically limited. First Embodiment Shape Bear First, a first embodiment of the optical disc manufacturing method of the present invention will be described. Manufacture of stamping dies @ First 'With reference to Figs. 1 (A) to 1 (E) to Figs. 2 (A) to 2 (D), the production of a stamper for a support substrate for manufacturing an optical disc and each substrate for manufacturing will be described. As shown in FIG. 1 (A), an optically flat glass 20 is prepared, and its surface is washed. Next, as shown in FIG. 1 (B), a photoresist is uniformly coated on the surface of the glass 20 with a predetermined thickness t. 21, and heat treatment (baking). This predetermined thickness t is set so that a desired depth of a groove (to be described later) can be obtained. In addition, the purpose of performing the heat treatment is to promote stabilization of the groove size when the photoresist 21 is developed. This completes the glass master 2 2. < After ', as shown in FIG. 1 (C), with laser light, the bottom of the original disc 2 2 that needs to be formed as a guide groove bottom or a groove (hereinafter collectively referred to as "concave / groove") is performed. exposure. The exposure is performed using a laser beam recorder (LBR) and is performed by turning on and off the laser light corresponding to the signal to be recorded. Continuing, as shown in FIG. 1 (D), the development of the photoresist 2 is performed. Thereby, the photoresist 21 in the exposed portion is removed, and a groove 23 is formed. Furthermore, as shown in Fig. 1 (E), the glass master disc is applied to the original glass by non-electrolytic treatment, etc. — This standard is applicable to a standard of 8 (CNS) A4 specifications (210 X 297) 556188 V. Description of the invention (7) After the surface is subjected to chemical conductive treatment, as shown in FIG. 2 (a), a key plate 24 having a predetermined thickness (for example, about 0.3 mm) is formed on the entire surface of the glass master disk 22. Following 2 ′, as shown in FIG. 2 (B), the key plate is peeled from the glass master plate ⑷, and the concave button formed on the glass surface is convexly transferred under the electric clock plate M, and the plate 24 The main stamper 2 is formed. In addition, the surface of the glass master 22 after peeling the electroplated plate 24 is removed from the photoresist 2 1, and the surface is polished and washed for reuse. Thereafter, the surface of the main stamper 24 a ( After the oxidation treatment, as shown in FIG. 2 (C), a plated plate (eg, a plated plate 25 with a thickness of about 0.3) is formed on the entire lower surface. Next, as shown in FIG. 2 (D), the autonomous stamping die 24a The glass plating plate 25. The convex grooves 23a formed on the surface of the main / intermediate die 24a are concavely transferred to the upper surface of the plating plate 25, and a stamping die 2 ^ is formed by the plating plate 24. As a result, after the surface (upper surface) of the female stamping die 25a is subjected to oxidation treatment, as shown in FIG. 3 (A), a plated plate 26 having a predetermined thickness (for example, about 0.3 mm) is formed on the entire upper surface. Next, as shown in FIG. As shown in FIG. 3 (B), the electroplated plate 26 is peeled from the mother stamping die 25a. The concave groove 23b formed on the surface of the mother stamping die 25a is convexly transferred to Below the plated plate 26, a stamping die 2 6 a 0 is formed by the plated plate 26. Finally, as shown in FIG. 3 (C), the stamping die 2 6 a is ground to form a predetermined thickness. At the same time, the signal position of the groove is used as the reference alignment center, and the center hole 2 6 b is processed, and then the outer edge is trimmed to form the outer diameter d 1. In this way, a stamping die 2 6 a is made, and this stamping die 2 6 a Separately manufactured the following _____- 10- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 556188 A7 _______B7 ΐ, each signal recording section of the invention description (8). Support substrate or manufacturing base The manufacturing steps are followed by a description of a supporting substrate (second substrate) for manufacturing a disc formed by transferring a concave-convex pattern from each stamping die 26a or a manufacturing substrate (first substrate) temporarily used in the manufacturing steps. As shown in FIG. 4 The above-mentioned stamping die 26a is mounted on a mold 27 such as an injection molding machine. The size of the cavity 27a of the mold 27 is selected to be slightly smaller than the outer diameter D (such as a radius of about 0.5 to 1 mm) of the disc substrate. , As described later, on the second substrate supporting the substrate When the signal recording section is closed, avoid the sticking agent or the protective film from adhering to the manufacturing substrate, and cover the outer edge portion of the signal recording section with the protective film. Without special consideration, the size of the chamber 27a can also be equal to Or larger than the outer diameter of the optical disc substrate. At this time, the manufacturing substrate 28 is formed by injection molding in the same manner as a general optical disc supporting substrate; The support substrate does not constitute an optical disc, so no measures to reduce the moisture content are required. It is only necessary to pay attention to the groove transfer property and the substrate 28 for peeling from the stamping die. The manufacturing substrate 28 is preferably formed of an acrylic resin. For this reason, when a semi-transmissive reflective film for forming a signal recording portion is formed by a sputtering method in a subsequent step, the semi-transmissive signal recording is peeled from the substrate 28 without pressure according to the physical and chemical properties of the acrylic resin. unit. In addition, as will be described later, in the case where the supporting substrate constituting the optical disc is also a single-sided reading type optical disc, since a recording and reproduction beam is not required ___- 11-This paper standard is applicable to the Chinese National Standard (CNS ) A4 size (210 X 297 mm) 556188 A7 B7 5. Description of the invention (9) Since the support substrate is transmitted, non-translucent resin can be used, and the same shape as above. Steps of Forming Signal Recording Layer Next, a method of forming a plurality of signal recording portions using the above-mentioned manufacturing substrate will be described in detail. This embodiment describes the formation of two layers of signal recording sections on a support substrate. However, when three or more layers of signal recording sections are formed on one side of the support substrate, the number of substrates used for manufacturing increases, and the method is the same. As shown in Figs. 5 (A) and 5 (D), a manufacturing substrate 41 serving as a first substrate and a support substrate 31 serving as a second substrate constituting an optical disc are prepared, respectively. As described above, the manufacturing substrate 41 is formed of a synthetic resin, more preferably an acrylic resin, and is formed by a stamping die 2 6a, and a specific concave-convex pattern corresponding to the groove is transferred. A first signal recording portion having semi-transmittance is formed on the manufacturing substrate 41. The support substrate 31 of the second substrate is formed of a punched film 26a having a rotation direction opposite to that of the manufacturing substrate 41. Generally, a material such as polycarbonate resin is used. A second signal recording portion of the optical disc is formed on the support substrate 31 of the second substrate. This embodiment is characterized in that the signal recording portions are formed individually or simultaneously on the substrate 41 for manufacturing the first substrate and the support substrate 31 of the second substrate. That is, as shown in FIG. 5 (B), the -12-th paper size corresponding to that shown in FIG. 5 (A) is formed in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 556188 A7 B7 V. Description of Invention (10)

On one surface of the substrate supporting the unevenness of the grooves of the supporting substrate 31, a second recording unit 32 is formed. At this time, the second signal recording portion 32 is a signal recording portion including a phase change type green recording layer and located on the innermost side of the optical disc. As shown in FIG. 6, a self-supporting substrate 31 is laminated with a metal reflective layer 33 and a dielectric layer. 33. The phase change type records each layer such as the green layer 35, the dielectric layer 36, and the like to form a film. The metal reflection layer 33 is a layer that reflects the incident recording and reproduction light beams and forms a light return layer. The metal selected from Al, Ag, Au, or these metals or these metals and An alloy of other metals forms a film having a thickness corresponding to a specific reflectance. Dielectric layer 33 is formed of Zn_Si0 2 & Si, SiC, Ge, GeC, Sn, SnC, A1, A1C, Ga, GaC, In, InC, etc. β-phase-change recording layer 35 is formed of Sb , Te, In, Ag, Ge, etc., and those that combine two or more of the above materials into a compound state to form a film. For example, use GeSbTe. Dielectric film 36 is formed by Zn-SiO2 and nitrides or oxides such as Si, SiC, Ge, GeC, Sn, SnC, A1C, Ga, GaC, In, InC, as shown in FIG. 5 (C). Perform initialization. In the state when the film is formed as described above, the phase-change type recording layer 35 is in an amorphous state similar to the deposition state. Therefore, after the phase-change recording layer is formed, in order to record information thereon, as described above, it is necessary to perform an initialization operation to form a crystalline state. 0 -13- This paper applies to China National Standards (CNS) A4 Specifications (210 X 297 mm) 556188 Α7

Β7 V. Description of the invention (μ The initialization operation performed at the stage shown in FIG. 5 (C) is performed using the same device as that of the optical pickup illustrated in FIG. 12; for example, the implementation described in FIG. 13 is performed. Initialization. However, this embodiment is different from FIG. 3 in that only one layer of the second signal recording portion 32 is formed on the support substrate 31 of the optical disc substrate. That is, in FIG.丨 In addition to forming the light spot SP1 on the second signal recording section 7, a part of the collected light beam 1 passes through the first signal recording section 7 and reaches the first signal recording section 5 on the inner side. A light spot SP2 is formed, and the light beam L is reflected by the metal reflection film of the first signal recording section 5 and is reflected back to the second signal recording section 7, and the light spot SP3 is formed by the diffused light beam. Therefore, the second signal recording section 7 borrows The interference of the spot SP1 and the spot SP3 of the return light and the phase difference between the spot and the return light of the objective lens 丨 4 cause the intensity to be slightly stronger. However, this embodiment is on the optical disc The support substrate 31 of the substrate has only one layer of the second Erji recording portion 32. In this state, the light beam can be focused only on the signal recording section 32. Therefore, the "" number recording section 32 does not generate interference between the light source and the return light, and can be initialized with high accuracy, and a signal recording having excellent recording and reproduction characteristics can be formed. Section 3 2. While performing the above-mentioned operations, or in addition to the above-mentioned operations, other signal recording green portions are formed using the manufacturing substrate 41 of the first substrate. As shown in FIG. 5 (D) 'In the manufacturing substrate 41 An asperity corresponding to the groove is formed thereon as shown in FIG. 5 (E). A first signal recording portion 42 c is formed on the uneven surface. At this time, the first number recording portion 42 forms a green layer including a phase change type. , And -14-This paper size is applicable to China Painting National Standard (CNS) A4 specification (21〇x 297 public love) 556188

As described later, in the next step, it overlaps with the second signal recording green part ^. Therefore, as shown in FIG. 6, the first signal recording unit U stacks the dielectric layer 44, the phase-change recording layer 45, and the dielectric layer from the n-side of the substrate to form a film ^ The dielectric layer 44 is formed of Zn_Si 2 and Si , SiC, Ge, GeC, Sn, A Ga 'GaC, In' InC and other nitrides or oxides to form the recording material layer 45 by Sb, Te, In, Ag, Ge, etc. The compound state is used to form a film. For example, GeSbTe is used. The dielectric film 46 is formed of Zn-Si02 and nitrides or oxides such as Si, SiC, Ge, GeC, Sn, SnC, A1C, Ga'GaC, In, InC, etc. In this way, the first signal recording portion 42 is the same as the second signal recording portion 2 except that there is no metal reflection layer. Next, 'initialization is performed as shown in FIG. 5 (F). That is, when the film is formed as described above, In the state, the phase-change recording layer 45 is in a similarly deposited amorphous state. Therefore, after the phase-change recording layer is formed as a film, information can be recorded thereon in the same manner as the second signal recording section 32. It is necessary to perform the initialization operation to form a crystalline state. Figure 5 (F) The initializing operation shown is the same as the second signal recording green portion 32. Since only one layer of the first signal recording portion 42 is formed on the manufacturing substrate 41 in this embodiment, as described above, the signal recording green portion 42 is formed. There is no interference between the light source and the back light, and it can be initialized with good accuracy. It is tangible. • 15- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 public love). 556188 A7 B7 5. Description of the invention ( 13) " " --- A signal recording section 4 2 having excellent recording and reproduction characteristics is formed. Next, as shown in FIG. 5 (G), each of the signal recording sections 32 of the support substrate 3 and the manufacturing substrate ^ is formed. Opposite the signal recording unit 42, a UV curing resin (hereinafter referred to as “uv curing resin”) is used as a bonding agent 5 ^ for bonding. This UV-curable resin is cured by irradiating ultraviolet rays at this stage to form an intermediate layer 51. Specifically, for example, on the second signal recording section 32 on which the initialization of the substrate 31 is completed, the UV curing resin 51 is spin-coated, and the first signal of the initialization of the manufacturing substrate 41 is superimposed thereon. The recording unit 41 is bonded by irradiating ultraviolet rays. Next, as shown in FIG. 5 (H), the manufacturing substrate 41 is peeled. At this time, when the manufacturing substrate 41 is formed of the acrylic resin as described above, the manufacturing substrate 41 can be made without applying pressure on the first signal recording unit 42 according to the physical and chemical characteristics of the acrylic resin. Peel off. Finally, as shown in FIG. 5 (1), a protective layer 52 is provided on the surface of the first signal recording section 42. The protective layer 52 may be formed by laminating a transparent material such as a polycarbonate film with a pressure-sensitive adhesive on the surface of the first signal recording section 42. Finally, a protection is provided on the surface of the first recording section 42. Layer 5 2. The protective layer 52 may be formed by laminating a transparent material such as a polycarbonate film on the surface of the first signal recording portion 42 with a pressure-sensitive adhesive. Through the above steps, a disc with a layer structure as shown in FIG. 6 can be manufactured at 60 °. The above steps' apply a thickness of I -16 with a pressure-sensitive adhesive of about 20 // m-this paper size applies China National Standard (CNS) A4 specification (210X 297 mm) 556188

It is a M mm support substrate 41, a second signal recording portion 32 having a thickness of about 0.2, an intermediate layer 51 of a hardened resin having a thickness of about 20 Å, a first signal recording portion 42 having a thickness of about 9, and a thickness of about 9 °. The protective layer "can form a single-sided double-layer optical disc 60. However, in this embodiment, the signal recording sections 32 and 42 are initialized in a state where the support substrate 31 and the manufacturing substrate 41 are respectively formed into a film, which can be avoided. The interference of the light source beam and the returning beam when the overlapping signal recording section is initialized. Therefore, precise initialization can be performed without affecting the characteristics of recording and reproducing signals, and an optical disc 60 having a plurality of signal recording sections on one side can be manufactured. Figs. 7 (A) to 7 (E) show a second embodiment of the present invention. In Figs. 7 (A) to 7 (E), parts having the same reference numerals as those in the first embodiment have the same parts. The structure is not repeated here. As shown in FIG. 7 (A), the first recording substrate 41 is provided with the _4th recording portion 42. The signal recording portion 42 is spin-typed. Coating and other methods to adjust the thickness of the UV-curable resin 5 5 In order to form a uniform thick transparent film 5 2 with a protective layer formed on the adhesive agent 5 5, the adhesive agent is hardened and bonded by irradiating ultraviolet rays. At this time, the protective layer 52 cannot maintain a flat shape when it is a monomer. An extremely thin film with a thickness of about 85 is used. Next, as shown in FIG. 7 (B), laser light B indicated by an arrow is irradiated, and the protective layer 52 of the laminated film is transmitted through the protective layer 52 to perform a first signal. Initialization of the recording section 42. As shown in FIG. 7 (C), the adhesive film is peeled from the manufacturing substrate 4 丨 -17. This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) ) 556188 A7 B7 V. Description of the invention (15) Protective layer 5 2 so that the first signal recording portion 42 remains on the protective layer 52. That is, the first signal recording portion 4 2 which has been initialized is through a bonding agent. 5 5 is bonded to the protective layer 5 2 of the bonding film, so when the protective layer 5 2 of the bonding film is peeled off, it is closely bonded to the bonding film, not the substrate, and is peeled from the manufacturing substrate 4 丨 again. Forming a support substrate 31 manufactured by other steps and a second signal recording formed on the support substrate 31 32. Prepare the second signal recording unit 32 that has been initialized in the same manner as the first embodiment. Next, as shown in FIG. 7 (D), the second signal recording unit 3 that is initialized and formed on the support substrate 3 丨2, a UV curing resin bonding agent 51 constituting an intermediate layer and made of a transparent material, which is the same as the first embodiment, is used to hold the bonding agent 51 so that the film 52 and the fixed first signal recording portion 4 2 Relative bonding. Continue to 'harden' the bonding agent 5 by irradiating ultraviolet rays, as shown in Fig. 7 (E), to produce an optical disc 70 having the same overall structure as that produced by the first embodiment. Thus, since the second embodiment can initialize the signal recording green portions 32 and 42, respectively, it is possible to avoid interference between the light source beam and the returning light beam when the overlapping signal recording portion is initialized. Therefore, a precise initialization operation can be performed without affecting the recording and reproducing signal characteristics, and an optical disc 70 having a plurality of signal recording sections on one side can be manufactured. In addition, since the transparent film constituting the protective layer 52 is pasted on the first signal recording section 42, the manufacturing substrate is peeled off through the protective layer, and the recordable information is performed on the first signal recording section 42. Initialization, so available in single -18-

556188 A7 B7 16 Description of Invention (Initialization is performed when the body is covered with an ultra-thin protective layer 52 that is not kept flat. This allows' even the use of extremely short-wavelength light and a high NA beam to focus the objective lens as a disc The recording and / or reproducing light beam on 70, because the protective layer 5 2 arranged on the reading end is extremely thin, can still appropriately suppress the occurrence of aberrations. Third Embodiment Figures 8 (A) to 8 (F) The third embodiment of the present invention is shown. The parts marked with the same reference numerals as in the first embodiment in FIGS. 8 (A) to 8 (F) have a common structure, so repeated explanations are omitted. As shown in FIG. 8 (A) As shown, a first signal recording section 42 is provided on the manufacturing substrate 41 of the first substrate. In this state, the first signal recording section 42 is irradiated with the light beam L to perform the initialization of the first signal recording section 42. Continuing, as shown in FIG. 8 (B), a transparent bonding agent 5 5 is used on the first signal recording portion 42 after initialization, and the transparent film constituting the protective layer 52 is bonded to form FIG. 8 (E). The subsequent steps in Figures 8 (D) to 8 (F) and the second embodiment are shown in Figure 7 (C ) ~ 7 (E) are the same, so repeated descriptions are omitted. Therefore, the third embodiment can exert the same function and effect as the second embodiment. Fig. 6 shows the manufacturing method of the present invention. Schematic cross-sectional view of the structure of the manufactured disc. Note that parts with the same symbols as those used in the description of the manufacturing method have a common structure, so detailed descriptions are omitted. -19- This paper size applies to China National Standard (CNS) A4 Specifications (210 X 297 mm) Binding line 556188 A7 _______B7_ V. Description of the invention (17) The disc 60 in FIG. 6 is the same as the previous disc shown in FIG. The center hole, etc., only shows the enlarged sectional state of the characteristic layer structure in the figure. The above embodiment has described the manufacturing method of an optical disc having two recordable signal recording sections, but it is also possible to manufacture three discs with the same method. The above-mentioned optical disc with a plurality of signal recording sections. Advantageous Effects As described above, the present invention can provide a signal that does not affect the characteristics of recording and reproducing signals. A method for manufacturing an optical disc of a signal recording section. The drawings are briefly explained. Figures 1 (A) to 1 (E) are sectional views showing the steps of manufacturing a glass master disk in sequence. Figures 2 (A) to 2 (D) are sequential display manufacturing A cross-sectional view of a stamping die step. Figs. 3 (A) to 3 (C) are cross-sectional views sequentially showing the steps of manufacturing a punching die. Fig. 4 is a cross-sectional view showing a forming step of a substrate for optical disc manufacturing. Fig. 5 (A) ~ 5 (1) A cross-sectional view sequentially showing the steps of forming the optical disc signal recording section of the first embodiment of the present invention. Fig. 6 is an explanatory diagram showing a sectional structure of a disc manufactured by the manufacturing method of the present invention. Fig. 7 ( A) to 7 (E) are sectional views sequentially showing the steps of forming the optical disc according to the second embodiment of the present invention. 8 (A) to 8 (F) are cross-sectional views sequentially showing the steps of forming an optical disc according to a third embodiment of the present invention. Fig. 9 is a schematic cross-sectional view showing an example of a possible structure in which a plurality of signal recording sections / optical discs are formed on one side. -20-This paper size applies Chinese National Standard (CNS) A4 Regulation 4 (21〇 乂 297 €

Claims (1)

The Central Rubbing Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperative, printed 556188 A8 B8 C8 -------- D8 6. Scope of Patent Application— ~-1 · A method for manufacturing optical discs, which has: Name 4 ^ In transfer printing A step with a specific uneven pattern is sufficient to set a step including a phase change type recording #, a soil green layer, and a first signal recording on a substrate; and a second substrate with a specific uneven pattern transferred thereon. A step of the second signal recording section of the variable recording layer; and a step of relatively matching the first signal recording section and the second work record & t ^ 邵; characterized in that: -Prior to the step of relatively bonding the signal recording section and the second signal recording green section, the initialization steps of recordable information are performed on the I signal recording section and the second signal recording section, respectively. 2. The manufacturing method of the optical disc according to item 1 of the patent application scope, wherein after bonding the first signal recording portion and the second signal recording green portion, the method further includes the step of peeling the first substrate from the first signal recording portion. And a step of providing a protective layer containing a transparent material on the first signal recording portion. 3. The method for manufacturing an optical disc according to item 2 of the patent application range, wherein the first substrate includes an acrylic resin. 4 · The method for manufacturing an optical disc according to claim 1 of the patent, before the first signal recording portion and the second signal recording green portion are bonded, the method further includes: a transparent film is bonded to the first signal recording portion. A step of removing the first substrate from the first signal recording section. 5 · If the manufacturing method of the optical disc in item 丨 of the patent application, which is used as -22- This paper size is applicable to China National Standard (CNS) A4 (21〇 × 297 mm) -------- (Please read the precautions on the back before filling in this page.) Order 556188 A8 B8 C8 D8 6. The scope of patent application is the stamping die with the specific pattern with the concave-convex pattern corresponding to the groove to form the first substrate. At the same time, use a stamping die with the same pattern as the above concave-convex pattern, but with a different rotation direction to form the second substrate. (Please read the precautions on the back before filling this page.) 23- This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) 556188 Patent Application No. 090125563 Chinese Specification Replacement Page (February 1992) A7 V. Description of the Invention (18) Figure 10 is An example of the optical system structure of an optical pickup for recording and reproducing the disc information shown in Fig. 9. Fig. 11 is an explanatory diagram showing the initialization state of the signal recording section of the disc shown in Fig. 9. This paper ruler Applicable to China National Standard (CNS) A4 specification (21 × 297 mm) Figure 12 is a conceptual diagram showing the interference state of light and returning light of the light source during the initialization of the signal recording section of Figure 11. Component symbol description 1 Disc 22 glass Original plate 2 Support substrate 23 Groove 3 Center hole 24 Plating plate 5 Second signal recording portion 24a Main stamping die 6 Intermediate layer 25 Plating 7 First signal recording portion 25a Female stamping die 8 Protective layer 26 Plating 10 Optical pickup 2 6a Stamping mold 11 Light source 2 6b Center hole 12 Collimation lens 27 Mold 13 Folding mirror 27a Cavity 13a Semi-transmissive reflective film 28 Manufacturing substrate 14 Pair of objective lens 31 Support substrate (second substrate) 15 Condenser 32 Second signal recording section 16 Light Detector 33 Metal reflective layer 17 Mandrel motor 34 Dielectric layer 20 Glass 35 Phase-change recording layer 2 1 Photoresistor 36 Dielectric layer 556188 Patent application No. 090125563 Chinese manual Replacement page (February 1992) 5 Explanation of the invention (183) 41 Manufacturing substrate (first base 60 disc plate) 70 disc 42 First signal recording section 80 disc 44 Dielectric layer L beam 45 Phase-change recording layer SPI Condensing light on the first recording layer 46 Dielectric layer SP1 Light spot 5 1 Intermediate layer SP2 Light spot 52 Protective layer SP3 Light spot 55 Bonding agent _ -21a- This paper applies Chinese national standard (CNS) A4 size (210 X 297 mm)