TW571300B - Recording media, injection molding metal mold and injection machine, molding method, and drive mechanism for the recording media - Google Patents

Abstract

The invention is to provide a compact, high capacity, simultaneously, recording media with precise disc and rotational centric shaft, injection molding metal mold and injection machine, molding method, and drive mechanism for the recording media. There is provided with a recording media having no through hole so as to enlarge a recordable area. Then, there is provided with a positioning mechanism on the no through hole of the recording media substrate so as to make the enlarged recordable area and rotational centric shaft preciously consistent with each other. Also, according to an injection machine and molding method of such the recording media, due to having a thermal longitudinal runner, it is very easy to form the recording media having no through hole and thus, thereby simplifying manufacturing process, and the substrate that is molded will not fall from the injection machine but form a connection portion for releasing from the metal mold. In this way, the drive mechanism of such recording media having no through hole is retained, mounted, and rotated by a rotational mechanism and mounting mechanism.

Description

571300 A7 ________ B7 V. Description of Invention (彳) [Technical Field to which the Invention belongs] (Please read the notes on the back before filling out this page) The present invention relates to general recording media, injection molding dies and injection molding machines, forming A method and a driving mechanism of the recording medium, in particular, a novel-shaped recording medium and a mold for manufacturing the recording medium, an injection molding machine and a molding method, and a driving mechanism of the recording medium. The present invention is suitable for, for example, a next-generation compact disc. [Previous Technology] In recent years, optical disc systems have been developed as large-capacity, high-density information recording media, and have been practically used. It is also used in the case of storing image files or animation files, and requires miniaturization in order to improve the portable disc. Optical discs are recording media that use laser light during data recording and / or reproduction, and magneto-optical discs are also included. Such discs are generally used as audio discs, video discs, large-capacity image files, and computer-assisted memory devices. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs The optical disc basically has a disc-shaped substrate made of plastic, glass, etc. Concentrically or spirally shaped guide grooves or recesses called grooves are formed on the substrate. After the grooves or pits are formed, a recording layer is covered thereon, and then a protective film is formed on the uppermost side. Finally, the optical disc has a laminated structure composed of a substrate, a recording layer, and a protective film. A typical optical disc in the past has a through-hole portion called a positioning portion at the center of the disc. Such a positioning unit is a drive mechanism for a recording and reproducing optical disc for fixing and rotating the optical disc. The positioning portion can be divided into a through hole and a transparent portion. In particular, the through-holes are mainly used for fixing optical discs, and the transparent part is mainly used in this paper. The standard of China National Standards (CNS) A4 (210 X 297 mm) is applied. 571300 Printed by the Consumers ’Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs. V. Description of the invention (2) In keeping. Here, the drive mechanism of the optical disc has a structure shown in FIGS. 19 and 20, for example. Fig. 19 is a schematic cross-sectional view showing an example of a disc drive mechanism 3 0 0 e, and Fig. 20 is a schematic cross-sectional view showing a structure of a drive mechanism 3 00 f as another previously exemplified state. The driving mechanism 300e is composed of a main shaft 310e and a positioning portion 3 20e. 310e is a holding member having a rotation shaft, and has a holding portion 3 1 2e and a fixing portion 3 1 4e. According to Fig. 19, the holding portion 3 1 2e is provided at the transparent portion of the positioning portion (a predetermined distance from the rotation axis of the main shaft) to hold the optical disc from below. The fixed portion 314e is provided at the center of the main shaft, and has a size of a through hole which is inscribed in the positioning portion of the optical disc 100g. Holding portion 312e—contacts the optical disc 100g, and the fixed portion 314e enters the inside of the through hole to fix the optical disc 100g. By such a role of the fixing portion 3 1 4 e, the eccentricity of 100 g of the optical disc is reduced and fixed. The positioning portion 3 20e is a fixing member that holds the optical disc 100 g from above, and has a blocking portion 322e corresponding to the holding portion. As shown in Fig. 19, the blocking portion 3 22e is provided on the upper portion of the holding portion 3 12e via an optical disc 100g. With this, the optical disc 100g can be kept vertically fixed with respect to the rotation axis. Moreover, since the holding portion 31 2e and the blocking portion 322e are provided on the transparent portion of the optical disc 100g, it is possible to prevent the optical disc from being shaken or moved during rotation. On the other hand, the driving mechanism 300 f is equipped with a magnet, and the magnets 350 and 3 52 can be fixed to drive the optical disc 100 g. As shown in FIG. 20, the magnets 3 50 and 100 g The magnet 3 52 or the magnetic plate is arranged opposite to each other, and the magnetic disc makes the 100g of the optical disc also compatible with the main axis of the paper. The Chinese national standard (CNS) A4 specification (210 X 297 mm) h I-* ----- ----------- I ^ ---- II. (Please read the precautions on the back before filling this page) -I 9— 1 ϋ. IS ϋ H _ 571300 A7 B7_ V. Description of the invention (3) 3 1 0 f synchronous rotation. As described above, the positioning unit is used as a positioning mechanism, and can accurately position the rotation center axis of the optical disc and the rotation center axis of the drive mechanism. Therefore, the positioning portion cannot become a recording area, but becomes a so-called non-recording area. Generally, the area occupied by the positioning portion cannot be made smaller in proportion to the smaller diameter of the disc. In the manufacture of the optical disc, the recording layer and the protective layer are formed so as to avoid the positioning portion. Finally, for the purpose of miniaturization without compromising the large-capacity performance of the optical disc, Patent No. 2692 1 46 also discloses an optical disc having a small diameter without a through hole. Fig. 22 is a schematic cross-sectional view showing the shape of a substrate of an optical disc without a through-hole portion, and Fig. 22 is a schematic cross-sectional view showing the structure of a conventional optical disc 1 10f. Here, the optical disc is embodied as a single-sided recording method. The optical disc has, for example, a disc substrate 110f and a recording layer and a protective layer. The disc substrate 1 10f is a transparent disc-shaped substrate made of plastic, glass, or the like. A recording surface or the like is provided on the surface of the substrate 1 10f. Such a recording surface is formed with concentric circular or spiral guide grooves called grooves and recessed portions called pits. A recording layer and a protective film are sequentially formed on the tracks and the pits. Finally, the optical disc has a laminated structure composed of a substrate 11 f 'recording layer and a protective film. The outermost end of the optical disc without a through-hole portion is held and rotated by the optical disc device. Here, when the recording area is eccentric to the center of rotation of the optical disc substrate, tracking by the optical disc device cannot be performed accurately. However, the optical disc with the optical disc substrate 1 1 0f is formed because the formation of the grooves and pits corresponds to the outer periphery of the substrate 1 10f. Therefore, it does not produce tracking as described above. ) A4 size (21〇χ 297 mm) (Please read the precautions on the back before filling this page)

Order ------------- I Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (4) Characteristics of the problem. [Problems to be Solved by the Invention] As described above, the center portion of the optical disc is provided with a positioning portion that cooperates with the drive mechanism. The problem is that the ratio of recordable areas decreases. That is, even if the optical disc is miniaturized, the non-recorded area occupied by the positioning portion is not easily miniaturized, so only the recording area is reduced and the memory capacity is reduced. As a result, it is difficult to manufacture a compact and high-capacity optical disc. Furthermore, since no recording layer or protective film is formed in the area occupied by the positioning portion, it is difficult to form a film in areas other than the positioning portion. In addition, for an optical disc without a positioning portion, since the outermost end portion is held by the optical disc device, it is difficult to improve the positioning accuracy of the central axis of the optical disc and the central axis of the optical disc device. That is, the optical disc does not have a positioning mechanism, which causes crosstalk due to incomplete eccentric tracking of the magnetic track of the optical disc, and thus has an adverse effect on the recording and / or reproduction of the optical disc device. In addition, crosstalk is more likely to occur during high-speed reproduction, which has a greater impact on the optical disc device. As a result, in the conventional optical disc device without a through hole, since there is no positioning mechanism, it is difficult to reduce the adverse effect on the recording and / or reproduction of the optical disc device due to crosstalk and the like. [Means for Solving the Problem] Therefore, it is an object of the present invention to provide a novel and useful recording medium, an injection molding die and an injection molding machine, a molding method, and a driving mechanism for the recording medium that can solve a conventional problem. This paper size applies to China National Standard (CNS) A4 specification (210 X 297 public love) (Please read the precautions on the back before filling this page) -------- Order ------- II line __ 571300 A7 _______ B7 V. Description of the invention (5) More specifically, the present invention provides a small, large-capacity recording medium with the same accuracy as the rotation center axis of the optical disc and the driving device. The forming machine, the forming method, and the drive mechanism of the recording medium are for the purpose of illustration. In order to achieve the above object, a recording medium system as an example of the present invention includes a dish-shaped substrate having no through holes, and a recording layer provided on the substrate to form a recording area. This recording medium allocates the area of the conventional positioning portion and the through hole into a recordable area while increasing the memory capacity, and at the same time, it can be matched with the precision of the rotation axis of the optical disc device. As an example of the present invention, the injection molding metal mold system includes a first metal mold and a second metal mold that defines a cavity for forming in cooperation with the first metal, and is used to form a dish shape including no through holes. The substrate and a recording medium provided in a recording area of the substrate, wherein the first metal mold has a convex portion formed with a concave portion on the substrate, and the concave portion has a function of being connected to a drive portion for driving the recording medium. At the same time with the rotation center positioning function of the driving part. The first or second metal mold is provided with a connection portion, and is used to form a holding device for preventing the substrate from falling when the first and second metal molds are opened. According to this metal mold, it is possible to form an optical disc having no through hole and having a high accuracy in accordance with the rotation center axis of the optical disc device. As an example of the present invention, an injection molding machine includes an injection molding metal mold, a first metal mold, and a second metal mold for defining a molding cavity in cooperation with the first metal to form the mold. Contains a dish-like substrate without through-holes, and a recording medium set in the recording area of the substrate; the dimensions of this paper are applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before (Fill in this page) · I 丨 —I! —Order ---- IIII · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 A7 B7 V. Description of the invention (6) Unitary, the molten material is introduced into the space via the transport path. A mold clamping mechanism for moving the first or second metal mold, characterized in that the first metal mold has a convex portion formed with a concave portion on a substrate, and the concave portion has a driving portion for driving the recording medium; The function of connection and positioning function of the rotation center of the driving part. The first or second metal mold is provided with a connecting portion, and is used to form a holding device for preventing the substrate from falling when the first and second metal molds are opened. According to this injection molding machine, the same effects as those of the injection molding die described above can be obtained. In addition, as an example of the present invention, the forming method includes an injection molding metal mold having a first metal mold and a second metal mold opposed to the first metal to form a dish-like shape including no through-holes. A substrate, and a recording medium provided in a recording area of the substrate; an injection unit that introduces a molten material into the cavity via a conveying path; and a model clamp mechanism for moving the first or second metal mold, which is characterized by: A process in which a metal mold is combined with a second metal mold to form a cavity; a process in which a molten material forming the substrate is charged into the cavity through a conveying path; and a convex portion provided in the first metal mold is provided with a A process for connecting a driving part for driving the recording medium, and simultaneously forming a recessed part for positioning the rotation center axis of the driving part on the substrate; according to the connecting part provided on the first or second metal mold, When the first and second metal molds are opened, the holding device for preventing the substrate from falling is formed on the substrate, the process of cooling the cavity to solidify the molten resin, and the first Metal mold and second mold of the mold opening process. According to this molding method, the above-mentioned injection molding metal mold and injection molding machine can be obtained. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) ----- Order --------- line, printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 A7 V. Description of Invention (7) The same effect. In addition, as an example of the present invention, the drive mechanism includes a rotating portion that rotates a disk-shaped substrate without a through hole, and a support portion that can support the recording medium in a manner that can be branched. This type of drive mechanism can drive a dish-like substrate without through holes. As another aspect of the present invention, a recording device includes: the drive mechanism described above; and a reading head for recording or / and reproducing the recording medium; and a reading head connected to the reading head to process the reading. A signal processing device for the output of the head, such a recording device can obtain the same effects as the above-mentioned driving mechanism. Other objects and other features of the present invention will be apparent from the embodiments described below with reference to the accompanying drawings. [Embodiments of the Invention] Hereinafter, an optical disc 100 as an example of the present invention will be described with reference to Figs. 1 to 6. Here, FIG. 1 is a top view of the optical disc 100 as an example. Fig. 2 is a cross-sectional view for explaining the laminated structure of the optical disc 100 in Fig. 1. Fig. 3 is a sectional view showing the shape of an optical disc substrate 100a having a first aspect as an example. Fig. 4 is a cross-sectional view showing the shape of a disc substrate 100b having a second aspect as an example. Fig. 5 is a sectional view showing the shape of an optical disc substrate 100c having a third aspect as an example. FIG. 6 is a cross-sectional view showing the shape of an optical disc substrate with a fourth aspect as an example. In each drawing, the same reference numerals denote the same components and their explanations are omitted. In addition, those who assign letters to the same reference symbols generally use the Chinese paper standard (CNS) A4 (210 X 297 mm) as the paper size (please read the precautions on the back before filling this page) —— Ministry of Economic Affairs Printed by the Intellectual Property Bureau Staff Consumer Cooperatives 571300 A7

V. Description of the invention (8) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. As long as there is no special limitation, the reference symbols without letters are all the reference symbols with letters. Figures 1 to 6 show, for example, a single-sided recording type overwrite optical disc 100 having a diameter of 50 mm or less and a thickness of the substrates 100a to 100d. 6mm or less. The optical disc 100 includes a substrate 110, a positioning mechanism (recessed portion) 120, a holding portion 130, a recording layer 140, and a protective film 150. As shown in FIG. 1, the optical disc 100 has a data area 1 1 2 formed on the substrate 110. In addition, a track 1 1 4 and a pit 1 1 6 are also formed in the data area 1 1 2 according to the recording method of the optical disc 100. For example, the data area 1 12 of the optical disc 100 is illuminated with laser light, and the amount of reflected light that changes depending on the presence of the pits can be detected to read the information. In addition, the disc 100 can have management areas such as address information. The management area is an area where the read head of the optical disc drive device initially accesses the optical disc 100, and is an area inaccessible to the user. The so-called "inaccessible" means that the user cannot access when using the ordinary optical disc device. It is necessary to pay attention to, for example, the user's modification of the optical disc device, not only when using the same equipment as the manufacturer Meaning of rewriting. The data area 1 1 2 is an area available to the user. This area of the disc 100 can be used to record and / or reproduce image information, audio information, text information, software, and other information (user data). According to the optical disc of the present invention, even the data area η 2 of the conventional positioning portion can be used as a recording area, which is larger than before. The groove 1 1 4 is a guide groove (concave) of concentric circle or spiral shape, and also leads -1 0-This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) • T, installed- -----.— Order —------ (Please read the notes on the back before filling this page) 571300 A7 B7____ V. Description of the invention (9) (Please read the notes on the back before filling this page The convex part between the guide grooves is called the land surface. The pits 1 1 6 are mainly provided in the concave portions of the reproduction optical disc, and are formed on the grooves 1 1 4 and / or the surface of the grooves. Since the reflection of the laser light varies depending on whether the pit 1 1 6 is present, the amount of reflected light can be detected to read the information. The information is then represented by the length or interval of the pits 1 1 6. The array of pits 1 16 formed on the substrate is called a magnetic track, and information can be recorded along this magnetic track. The track pitch is usually about 1.5 μm, but in order to increase the recording density, the track is narrowing. Referring to FIG. 2, the optical disc 100 has a laminated structure including a substrate 110, a positioning mechanism (recessed portion) 120, a holding portion 130, a recording layer 140, and a protective film 150. At the time of reproduction, the substrate 1 110 has optical characteristics such as high transmittance and small complex refractive index due to repeated laser light. In this embodiment, although the substrate 1 10 is used, the thickness is 0, for example. Disc-shaped (polycarbonate resin) resin (PC) up to 6mm, but not limited to this, PC / ABS mixed with (polycarbonate resin) and (acrylic-butadiene-styrene) Transparent materials such as Carlo (ca I · y 1) series resins such as polymethyl methacrylate, glass, polyolefin (ρ ο 1 y ο 1 ef 1 η) series resins are also acceptable. The information pattern (signal side for recording information) on the substrate 1 1 10 above the data area 1 12 etc. is printed by the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. It is formed in advance. The information pattern is formed with a recording layer 140 ° positioning mechanism (concave portion) 1 20 described later as a part of the substrate 1 1 0. That is, the positioning mechanism 120 is formed simultaneously with the injection molding of the substrate 110. The positioning mechanism 120 is used to position the rotation center axis of the optical disc device and the rotation center axis of the optical disc. And the positioning mechanism 1 2 0 is equivalent to the previous -1 1-This paper size applies the Chinese National Standard (CNS) A4 (210 X 297 mm) 571300 A7

V. Description of the invention (10) A part of the area printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs is used as a fixed device for holding and fixing the driving mechanism 25, which will be described later. The shape of the positioning mechanism 120 is embodied in a cylindrical shape in the present embodiment, but it is not limited to this, but considering the fit with the tapered driving mechanism 300, it may be suitable for its shape. The substrate 1 10 having a positioning mechanism (recess) 120 is manufactured by an injection molding method. In the recessed part 120 of the substrate 1 10 of the present invention, a needle gate, which will be described later at the time of injection molding, is provided, and the inner peripheral part to the outer peripheral part is formed with a groove 1 1 4 and a recess 1 16. In general, the plastic substrate obtained by the injection molding method tends to have a large complex refractive index of the substrate at the inner peripheral portion. That is, the inner peripheral portion near the needle gate 206 (not shown) is skewed on the substrate. When this substrate's complex refractive index becomes large, this skew greatly affects the information recording unit such as the track 1 1 4 due to the deviation from the optical path length during the desired recording and reproduction, so the closer it is to the inner periphery, The more difficult it is to maintain good recording and reproduction characteristics. However, in the present invention, since a needle gate closer to the center (inner peripheral portion) than in the past is provided, the complex refractive index of the substrate generated in the inner peripheral portion can be reduced. As a result, good reproduction characteristics can be maintained even in the inner peripheral portion. 3 and 4 show an optical disc substrate 110a in which a printing unit 230 (not shown) is provided on a movable metal mold 220 (not shown), and a positioning mechanism 120 is provided on a side of a fixed metal mold 210 (not shown). And ll〇b. Figs. 5 and 6 show an optical disk substrate 11 in which a printing unit 230 (not shown) is provided on a fixed metal mold 210 (not shown), and a positioning mechanism 120 is provided on a movable metal mold 220 (not shown). 〇c and 11 〇d. In addition to this positioning -12- this paper size applies Chinese National Standard (CNS) A4 specifications (210 X 297 mm) i ---------- installation ---- (Please read the precautions on the back before (Fill in this page) Order --------- * 571300 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (η) It is better to provide a concave or convex holder outside the agency 120 The device 122 is configured to prevent the formed optical disc substrate 110 from remaining on the fixed metal mold 210 without being loosened from the fixed metal mold 210. Since the holding device 122 has an overcut shape, the substrate 110 can be attracted to the movable metal mold 220 side while the movable metal mold 220 is loosened. Further, the holding device 122 can hold the molded substrate 110 to the movable metal mold 220 by this shape. Thereby, the molding substrate 110 having the holding device 11 can easily loosen the metal mold 2 110, and when the mold is loosened, the molding substrate 110 can be prevented from falling to the outside of the mold. The substrates 110a to 110d according to FIGS. 3 to 6 can be areas of the data area 1 12 and can be suppressed to at least about half of the area occupied by the conventional positioning portion. For example, the substrates 110a and 110b shown in FIGS. 3 and 4 include areas other than the portion forming the holding device 1 22 so that almost all of the substrates 110c and 110d shown in FIGS. 5 and 6 can be set as the data area 1 1 2. The holding unit 130 is provided at the center of the optical disc and is used to rotatably support the driving mechanism during recording and / or reproduction. However, depending on the driving mechanism used (for example, the driving mechanism 300 described later), the holding unit 130 may It is used as a data area 1 1 2 (that is, a recordable area). Therefore, the drive mechanism 300 can be any of a non-recordable area and a recordable area. Although the holding portion 130 is a region equivalent to a part of the conventional positioning portion, it is sufficient if it is a narrower area than the conventional positioning portion having a through hole and a transparent portion. The drive for driving the optical disc of the present invention-13- The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 丨 ^ -------- Order ------- --Line · (Please read the notes on the back before filling this page) 571300 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 _____B7____ V. Description of the Invention (12) Structure 3 00, please refer to Figures 1 to 5 8 pictures to describe. The recording layer 1 40 is made of different materials depending on the recording method. In this embodiment, for example, although a GeSbTe series protected by a dielectric layer is used, a phase change recording material such as an InSbTe series, an AglnSb series, or the like may be used instead. The rewritable optical disc 100 used in this embodiment uses a phase change recording layer 140. The phase change record is that the recording layer 140 in the crystalline state is irradiated with strong laser light (for example, about llmW) for a short period of time to raise the temperature of the recording layer 140 to a high temperature (about 600 ° C). After it is melted, it is rapidly cooled. The recording layer 1 40 is made amorphous by rapid cooling, and the reflectance is reduced. The erasing of the recording is irradiated with a laser light (for example, about 6 mW) of a moderate intensity to the recorded area, and heated to about crystalline After the temperature is slightly higher, it is slowly cooled to crystallize to erase the records. The reflectance is restored by crystallization, and the reflectances in the crystalline and amorphous states are different during reproduction. In the near-infrared wavelength, The crystalline state has a relatively high reflectivity of about 20%. The intensity of the laser light during playback is adjusted to about 1/10 of the recording time (for example, about 1.5mW). And if it is a disc used during playback 1〇 〇Because this phase change is not required, the recording layer 1 40 can be formed as a metal reflective protective film 150. The setting is used to protect the recording area 1 丨 2. In this embodiment, It is made of dilute acid resin series UV-curable resin and has a thickness of about 10 μm. For other materials used as the protective film 150, for example, transparent polycrystalline silicon series or epoxy series resin can be used. -14- $ paper size Applicable to Zhongguanjia Standard (CNS) A4 specification (21G X 297 public love card) ^ I, install -------- order -------- (Please read the precautions on the back before filling this page ) 571300 Printed by A7 B7, Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (13) The recording layer 1 40 is formed by a thin film forming method such as a spray method ° The protective film 1 50 is formed by a spin coating method, for example It is formed here. The so-called spin coating method is a method in which a liquid material (recording layer 140 or protective film 150) is dropped on a substrate rotating at high speed, and the material is spread on the substrate by using its centrifugal force. Optical Disc 100 of the Invention With a through hole, a liquid material (the recording layer 140 or the protective film 150) can be dropped in the center of the optical disc 100, and the entire surface of the optical disc can be easily and uniformly coated by a spin coating method. As a result, it can be easily formed Protective film with uniform thickness 150. You can seek to reduce costs or reduce operating time. Due to the differences in recording methods, the above-mentioned optical discs are roughly divided into reproduction-only types, additional recording types can be eliminated (rewritable), and the representatives of reproduction-only optical discs are used for music CD (CD-DA) or LD, although users can not write information, but it has the feature that many originals can be produced from it, so it is very suitable for mass distribution media. In CD-R (Recordable CD) or DVD, a laser is used to chemically or physically deform the recording layer (pits). In this method, it is suitable because the recorded area cannot be overwritten. For the preservation and accumulation of important data. In addition, rewritable types such as CD-RW (rewritable CD), DVD-RAM, and MO magnetic optical discs can use the phase change method, or use laser and magnetic fields to repeatedly write on the recorded area multiple times. Enter new information. The following describes the injection molding machine 200 used to form the optical disc substrate 110 of the present invention with reference to FIGS. 7 to 9. Here, FIG. 7 is an example of the present invention. ) A4 size (210 X 297 mm) (Please read the precautions on the back before filling out this page) ------- Order --------- line, 571300 Employees of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the cooperative A7 B7 V. Description of the invention (14) A schematic cross-sectional view of the injection molding machine 200 shown in one aspect. Fig. 8 is an enlarged view of a main part of the movable mold 220 for forming the convex holder 122. Fig. 9 is an enlarged view of a main part of a movable mold for forming a concave holder 122; According to Fig. 7, the injection molding machine 200 has a fixed metal mold 210; a movable metal film 220; a printing section 230; a resin transport section 240; a heating unit 250; and a mold releasing section 260. The fixed metal mold 210 and the movable metal mold 220 are oppositely arranged. The fixed metal mold 210 has a male push surface and the movable metal mold 220 has a female push surface. However, the fixed metal mold 210 has a female push surface and the movable metal mold. It is also possible for 220 to have a male push surface. Moreover, the fitting surfaces of the metal molds 210 and 220 are not limited to the push-out shape as in this embodiment. The fixed metal mold 210 and the movable metal mold 220 each have a fixed mirror surface 212 and a movable mirror surface 222, respectively. A cavity 204 for forming a disc substrate is defined by cooperating with two mirror surfaces 212 and 222 and an outer ring 202 described later. As will be described later, a printing section 230 is provided on either of the fixed mirror surface 212 and the movable mirror surface 222. According to Fig. 7, the fixed metal mold 21 0 (fixed mirror surface 2 1 2) has a shape having a center portion (fixed bushing 2 1 8) in order to form the positioning mechanism 120 described above. However, such protrusions are not limited to the fixed metal mold 210, and may be formed on the movable metal mold 220 side. Referring to FIGS. 8 and 9, the central portion (on the removal pin 266) of the movable die 220 is formed with a connection portion 221 a for forming a convex holding device i22 a or a connection portion 221 b for forming a concave holding device 122 b. . In detail, the connecting part 221a will be described later with the shape of the movable side bushing 228-16- This paper size applies _ National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling (This page) Clothing -------- Order · -------- Line · Printed Agriculture 57300 A7 __ B7 by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs V. Description of the invention (15) The recess is formed, and This concave portion is filled with resin, and a convex holding device 1 2 a corresponding to the shape is formed. In addition, the connecting portion 2 2 1 b forms a front end of a detachment pin 266 described later into a convex shape, and shapes a corresponding concave holding device 122 b. With an injection molding machine 200 for forming this connection portion 221, for example, the substrates 110a and 110b shown in Figs. 3 and 4 are formed. The substrate 110 on which the holding device 122 is formed is pushed out of the holding device via a detachment pin 266 described later, and after being loosened from the movable metal mold 220, it is sucked by an extraction member (not shown) and transferred to the outside of the injection molding machine 200. Further, temperature grooves 214 and 224 storing a temperature adjustment medium are formed on the fixed mirror surface 212 and the movable mirror surface 222, and the temperature in the cavity is adjustable. For example, the temperature grooves 214 and 224 can cool the molten resin in the cavity due to the circulation of cooling water. The temperature grooves 2 1 4 and 224 are all arranged at an equal distance from the formation surface of the cavity 204 as shown in FIG. 7, and the capacity of the temperature grooves 2 1 4 and 224 is constant. The fixed metal mold 210 is fixed to the fixed table 216, and the movable metal mold 220 is fixed to the movable table 226. In the movable table 226, for example, four unillustrated tie rods are penetrated, and the movable table 226 can move relatively to the fixed table 2 1 6 along the tie rods. As a result, the movable metal mold 220 can relatively move with respect to the fixed metal mold 210. As the moving mechanism of the movable table 226, a desired mechanism such as a direct pressure type or a toggle type can be adopted. The fixed metal mold 210 and the movable metal mold 220 each have a fixed (metal mold) side bushing 218 and a movable (metal mold) side bushing 228. Fixed (Metal-17- This paper size applies to Chinese National Standard (CNS) A4 specifications (210 X 297 mm) (Please read the precautions on the back before filling out this page) * Installation ------- Order --- ------- Line 571300 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 Β7 V. Description of the invention (16) Mold) The side bushing 218 contains air insulation material 25 丨, hot cross runner 253 ' Hot cross runner heater 2 5 5. The movable (metal mold) side bushing 2 2 8 dwells contain a positioning rod 2 3 2, an air groove 2 6 2 described later, and a removal pin 2 6 6. The printing section 230 is a metal mold having a concave-convex shape engraved opposite to a desired product (replication: mass production record carrier), and is made of a material such as nickel. The embossed portions of the printing section 230 are provided for forming a preformat signal or a data signal. In the present embodiment, the printing unit 230 is not limited to the fixed mirror surface 222, but may be fixed to the fixed mirror surface 212. The method of fixing the printing section 230 will be described below. First, the positioning and positioning of the printing section 23 is performed using a positioning rod 232 provided at the center of the movable metal mold 220. The position of the printing unit 2 30 determined by the position is fixed by vacuum suction grooves 2 3 4 and outer suction grooves 2 3 6 under vacuum. This fixing method has the advantages of fixing the printing portion 230 and peeling Gu Yi. Here, the positioning mechanism 120 of the present invention, which is formed on the optical disk substrate 110, is formed on the opposite side of the signal surface formed on the printing section 230. The resin transfer unit 240 transfers the molten resin supplied from an injection unit described later into the cavity 204. Here, the resin conveying section 240 includes a cylinder nozzle 242 and a positioning ring 244. In this embodiment, the cylinder nozzle 242 transfers the molten resin M from a heating cylinder (not shown) to a manifold 246 described later. Here, according to FIG. 7, the positioning ring 244 is provided inside the movable mold fixing plate 226. Such a positioning ring 244 is provided in order to ensure the relevant positions of the cylinder nozzle 242, the movable metal mold 220 and the movable metal mold fixing plate 226. 0-18- This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ) I.  Install -------- • Order ------------ (Please read the precautions on the back before filling out this page) 571300 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Α7 Β7 Five Explanation of the invention (17) The heating unit 250 maintains the path of the molten resin M such as a short tube or a cross flow channel at a high temperature, and can prevent the resin from solidifying. The heating unit 250 is called a hot cross-flow channel, and is most commonly used among the cross-flow-free methods. As shown in FIG. 7, the heating unit 250 includes: an air insulation material 251; a thermal cross flow channel 2 5 3; a thermal cross flow heater 255; and a manifold 257; and a manifold heater 259. The air heat insulating material 251 sets the thermal cross flow path 253 and the fixed mirror surface 212 in a non-contact state. In this way, the cooling effect of the temperature groove 2 1 4 is to transfer heat to the hot cross runner 2 5 3 or the hot cross runner heater 25 5 and can be used to prevent solidification of the resin. In addition, the temperature of the molten resin M on the conveyance path can be controlled at the respective positions of the heater 25 5 for the hot cross runner and the heater 259 for the manifold. After the molten resin M passes through the resin conveyance section, it is conveyed toward the hot cross flow path 253 through the manifold 257 controlled by the temperature of the manifold heater 259. Thereafter, the transferred molten resin M is filled into the cavity 2Q4 via a needle gate 206 (not shown). In this way, by adopting the method of the hot cross runner, punching, cutting, etc. for forming the through-hole portion from the conventional use to the present has become unnecessary. The so-called needle gate 206 has a function of sealing the molten resin. Therefore, the needle gate 206 can serve as a boundary between the molten state and the solid state of the resin. In this embodiment, although a hot cross runner 2 53 is provided inside the fixed metal mold 210, a method of extending the nozzle of the molding machine may be used instead. The loose part 260 includes: a fixed (die) side air groove 262; a movable (die) side air groove 264; and a removal pin 266. Fixed (metal mold) side air -19- This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) J.  — · Install -------- tr -------- " line (please read the precautions on the back before filling this page) 571300 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Α7 Β7 5 Explanation of the invention (18) The air groove 262 and the movable (metal mold) side air groove 264 are used for releasing the formed optical disc substrate 110 from the mirror surface 212 or the printing portion 230 when the mold is opened. In addition, the removal pin 266 drives the formed optical disc substrate 110, which is helpful to carry the optical disc substrate to the next stage of the device. Referring to Fig. 9 again, the front end portion of the removal pin 266 may be used as the connection portion 221b. A method of molding the optical disc substrate 100 by the injection molding machine 200 will be described below with reference to FIGS. 10 to 14. Here, FIG. 10 is a cross-sectional view showing the injection molding machine 200 before filling the molten tree. Fig. 11 is a cross-sectional view of the injection molding machine 200 after the molten resin M has been injected. Fig. 12 is a sectional view showing the injection molding machine 200 at the time of mold opening. Fig. 13 is a cross-sectional view of the injection molding machine 200 when the molded substrate 100 is released. Fig. 14 is a schematic block diagram of an injection molding unit 200A having an injection molding machine 200. The injection molding unit 200A is provided with the injection molding machine 200, and includes a control unit 270, a temperature adjustment device 280, an injection unit 290, and a servo motor 295 for fixing the mold. Before the injection molding, the fixed metal mold 2 10 and the movable metal mold 2 20 are adjusted to a predetermined temperature in advance. The heating temperature of the molten resin in the injection unit is adjusted to 360, for example. (:. And the control unit 270 shown in FIG. 14 is used to perform feedback control (for example, using a variable resistor, etc.) on the current supplied to the heating device so that the temperatures of the tables 216 and 226 become a predetermined temperature (two It can be different or the same temperature). The temperature for adjusting the parallelism of the fixed table 2 16 and the movable table 2 2 6 is preferably adjusted to the table temperature during injection molding, specifically, Normal temperature is high -20- This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) ------- Order · --- ----- line, 571300 Α7 I ——----- Β7 V. Description of the invention (19) (Please read the precautions on the back before filling this page) Temperature in the range of 25 ° C to 60 ° C. Fixed work When the temperature of the stage 2 and 6 and the movable table 226 are different, the temperature difference is preferably within 15 °. And the adjustment temperature of the parallelism of the table is measured at the same place as ± 5 ° C, and it is best to have A temperature range of ± 2.0 is also possible. Here, the control unit 270 is connected to a temperature adjustment described later. Set 280, injection unit 29 ′ and servo motor for mold fixture 2 95, and control its operation. However, in order to control their operation, one or more control units can be provided. Temperature control device 2 8 0 series Under the control of the control section 270, the temperature of the table 2 1 6,226 is adjusted. The temperature adjustment device 28 is provided with a pipe inside the table 2 1 226, for example, it is composed of a heating device such as a heating wire and cooling water. The heating device is composed of, for example, a heating wire wound around the pipe. By controlling the amount of current flowing in the heating wire, the water flowing in the pipe in the table 2 1 6 and 2 2 6 can be adjusted. Temperature. Instead of cooling water, other types of refrigerant alcohol, gal den, f 1 ο η, etc. can be used. As a result, as shown in Fig. 10, when holding the mold, it can be high Accurately align the center. According to Figure 10, the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed the movable metal mold 220 and the fixed metal mold 210, for example, with a fixed pressure of fifteen tons. With fixed A printing portion 230 is installed on the opposite surface of the mold 2 10 through the suction grooves 2 3 4 and 2 3 6, and then the movable metal mold 220 and the fixed metal mold 210 are clamped to form a cavity 204. Here, unevenness is formed on the printing portion 230, and is made of a pure nickel material having a thickness of 0.3 mm, and a U-shaped pattern with a track pitch of 0.8 μm, a width of 0.3 μm, and a depth of 0.2 μm is formed on the surface.道 -21-This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 571300 A7-B7 V. Description of the invention (20) 114 and pre-format patterns such as address pitch or servo pit 116 It is formed on the surface of the optical disc substrate 100. The printing unit 230 may be provided on either the fixed metal die 210 side or the movable metal die 220 side. According to FIG. 14, the clamping of the metal mold is performed by a servo motor 295 for a fixed mold. The servo motor 295 for a fixed mold can be applied to, for example, ROBOSHOT of Fujitsu, and any electric method known in the industry. Fixed mold mechanism. The control unit 270 controls, for example, the number of fc revolutions of the servo motor and the current flowing through the motor to control the clamping force of the fixed mold. However, the fixed mold mechanism is not limited to an electric method, and a direct pressure mechanism using a hydraulic cylinder or an elbow mechanism using a magic hand can be used, which are all known in the industry. After the cavity is formed and the metal molds 210 and 220 have reached a predetermined temperature, the injection unit 290 directly injects the polycarbonate resin MH heated and melted at 3 80 ° C. Here, the injection unit 290 has the same structure as half of the users of the injection molding machine, and is composed of a heating cylinder (not shown), a screw, a hydraulic cylinder (or a servo motor), and the like. The temperature of the heating cylinder, the number of rotations of the screw, and the hydraulic cylinder (or servo motor) can control the injection output by the control unit 270. The molten resin M flows into the cavity 204 through the nozzle 242. As shown in Fig. 11, once the molten resin is fully charged, the resin and the temperature-adjusting medium circulating in the temperature grooves 2 1 4 and 2 2 4 will be cooled to the same temperature. As a result, a disc substrate 1 1 0 is formed. At this time, the supply of the resin is completed, and only the optical disk substrate 110 is formed by the thermal cross flow path 253. The result is that the disc substrate 110 -22- This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) Order --- Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (21) There is no excess solid formed on it, so it can be omitted to remove this Part of the process. After cooling, as shown in FIG. 12, the injection molding machine 200 releases the mold. At the same time as the mold is opened, the fixed side air groove 262 blows out air of a predetermined pressure to release the formed substrate 1 1 0 from the fixed mold . Here, as described above, since the optical disc substrate 110 of the present invention has the holding device 122, it does not fall from the injection molding machine, and can be easily demolded from the fixed metal mold 210. When the mold is opened, the optical disc substrate 110 is completed in a state of being fixed to the printing unit 230. As shown in FIG. 13, when the formed optical disc substrate 110 is ejected from the injection molding machine 200, a movable-side air groove 264 and a removal pin 266 are used. The movable-side air groove 264 ejects air of a predetermined pressure. In addition, the disc substrate 11 is pushed out by the removal pin 266 at the same time. Therefore, even in the case of the optical disk substrate 110 having the holding device 122, the mold can be released from the printing unit 230. The substrate 1 10 in the state shown in FIG. 13 is taken out of the injection molding machine 200 by a not-shown take-out device or the like, and is conveyed to the next-stage device. The formation of the recording layer 1 40 or the protective film is performed in the next stage device. As a result, a laminated structure of the optical disk substrate 100 as shown in FIG. 2 can be formed. The drive 300 of the optical disc 100 of the present invention will be described below with reference to FIGS. 15 and 16. FIG. 15 is a schematic cross-sectional view of the structure of the drive mechanism 3 00 as an example of the present invention. Fig. 16 is a schematic sectional view showing the structure of a drive mechanism 300b as a second example of the present invention. Drive mechanism 300 and 300b (hereinafter, unless specifically limited, the reference number 300 refers to their total -23- This paper size applies to China National Standard (CNS) A4 specification (210 x 297 mm) (Please read the note on the back first Please fill in this page for more details.) ---- Order --------- Line · Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 A7 B7 V. Invention Description (22) Included) Each has a main axis 310a And 310b (hereinafter, unless specifically limited, reference number 3 1 0 refers to them collectively) and positioning section 3 20 a and 3 2 0 b (hereinafter, unless specifically limited, reference number 3 2 0 refers to them collectively ). According to FIG. 15, the laser light is irradiated from below the optical disc 100 through the objective lens 3 30 a. According to Fig. 16, the laser light is irradiated from above the optical disc 100 through the objective lens 3 30b. The main shaft 3 10 is a member that holds the optical disc 100 from below, and is connected to a motor shaft of a motor (not shown). Therefore, the spindle 3 1 0 — rotates, and the disc rotates in steps. According to FIGS. 15 and 16, the front end of the main shaft 3 10 is provided with a holding portion 312 (collectively 312a and 312b) and a fixed portion 314 (collectively 3 1 4a and 3 1 4b). The holding portion 3 1 2 and the optical disc 100 are held against each other. In order to maintain the good stable performance of the optical disc, it is desirable to increase the contact area between the holding portion 312 and the optical disc 100. For example, according to FIG. 15, since the laser light is irradiated from below the optical disc 100, the objective lens 3 3 0 a is also disposed below the optical disc 100. In order to enlarge the recording area, it is necessary to reduce the holding portion 312a because the objective lens 330a must be moved as close to the inner peripheral portion as possible. The reduction of the holding portion 312a is achieved so that the contact surface between the holding portion 312a and the optical disc 100 is as close to the inner peripheral portion as possible. On the other hand, as shown in FIG. 16, when the laser light is irradiated from above the optical disc 100, it means that the locations where the holding portion 312b and the objective lens 330b are installed are different. As a result, the contact surface between the holding portion 3 1 2b and the optical disc 100 is made larger, and the holding portion 3 1 2b can be further provided at the outer peripheral portion. With this, it is possible to maintain the disc 100 and improve the rotation accuracy. -24- This paper size applies to China National Standard (CNS) A4 specification (210 X 297 mm) L ------- I ----- installation ------ --- order --- --- I --- " line (please read the notes on the back before filling this page) 571300 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (23) The fixed part 3 1 4 as the first FIG. 15 shows a convex shape, and is fitted with a positioning mechanism 120 corresponding to the optical disc 100. Thus, the center of the optical disc 100 coincides with the center of the fixed portion 3 1 4 to limit the eccentricity of the optical disc 100. Here, when the eccentricity of the optical disc 100 is recorded with information, the laser light can easily track the magnetic track, and the information can be accurately recorded. Further, the holding portion 3 1 2 and / or the fixing portion 3 1 4 may have protrusions (not shown) in order to prevent the optical disc 100 from rotating idly. Such protrusions are also provided on the optical disc 100, and the rotation of the motor can be transmitted to the optical disc by engaging the protrusions with each other. The positioning part 3 20 is a member for holding the optical disc between the main shaft 3 10 and the positioning part 3 20 a has a blocking part 3 22 a according to FIG. 15; a ball bearing 324 a; a shaft ball bearing holder 3 26 a; leaf spring 3 28 a. The blocking portion 3 22 a is made of metal or plastic, and directly contacts the center of the optical disc 100. The blocking portion 322 a rotates synchronously with the optical disc 100. The ball bearing 324a and the shaft ball bearing holder 326a are members that allow the optical disc 100 to rotate freely. The positioning portion 3 20 is to fix the optical disc 100 by applying a force from above. Because the force is too large, the rotation is uncomfortable. Therefore, a rotation blocking portion 3 22 a is provided; and a force applying member having no rotation force (in this embodiment, The leaf spring 328 a); and the ball bearing 324 a between the shaft ball bearing housing 3 26 a can stabilize the rotation of the optical disc 100. The leaf spring 3 28 a is a biasing member. The force applied by the leaf spring 328 a to the main shaft is superimposed on the rotation axis of the main shaft 3 1 0 a by the shape (ball) of the ball bearing 3 24 a. With these configurations, the positioning section 320a can fix and rotate the optical disc 100 with high accuracy. -25- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) I. ---------- install -------- order --------- line 4 | ^-(Please read the precautions on the back before filling this page) Ministry of Economy Wisdom Printed by the Consumer Cooperative of the Property Bureau 571300 A7 B7 V. Description of the invention (24) The objective lens 3 3 0 can be moved within the radius and vertical direction of the optical disc 100. When the laser light is incident on the optical disc 100, it must be converted into a light spot. Therefore, the objective lens is provided between the laser irradiation port and the optical disc 100, and has the task of converting the laser light into a light spot. The light spot is also made smaller. In order to increase the recording density, the focal point of the laser light must be focused on the recording layer. Therefore, the objective lens 300 moves up and down on the surface of the optical disc 100. While focusing properly, it also tracks the optical disc. A plane deviation of 100 can be focused at an appropriate position. The objective lens 330 and the laser irradiation light are arranged below the optical disc in FIG. 15 and above the optical disc in FIG. 16. The feature of the drive mechanism 300b in FIG. 16 is not that the substrate surface of the optical disc 100, but that laser light is emitted from the surface on which the recording layer and the protective film 150 are formed. Therefore, the substrate 1 1 0 which is not used for laser light reflection can be thicker than the optical disc exemplified in this embodiment. For example, the thickness of the substrate layer may be 1 mm or more. Furthermore, by increasing the thickness of the substrate layer, the depth of the positioning mechanism 1220 provided on the substrate 110 can also be made deeper. If the depth of the positioning mechanism 1 2 0 becomes deeper, the fixing portion 314 b of the corresponding main shaft 310 b also becomes longer, so that the accuracy of the center of the optical disc 100 and the rotation axis is changed to a high degree. As described above, the main shaft 310 b and its The holding portion 312b makes the contact surface between the holding portion 312b and the optical disc 100 larger, and the holding portion 3 1 2 b can be further provided at the outer peripheral portion. This prevents problems such as misalignment when the disc is rotated at 100. In the following, referring to FIG. 17, the optical disc 100 and the driving mechanism 3 0 c as another aspect of the example will be described. Figure 17 is the third example of the present invention. -26- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page). I- --Order --- 丨 丨 · Line ------- 571300 A7 B7 V. Description of the invention (25) The structure of the driving mechanism 3 00 c and the schematic cross-sectional view of the optical disc i〇〇e. The optical disc used in this embodiment has the same laminated structure as the optical disc illustrated in FIG. 2, and has an optical disc 100 e; a positioning mechanism 12 e; a recording layer 1 40 e; and a protective film 150. . In addition, since the molding method of the materials used is also the same, repeated description is omitted here. In particular, the feature of the optical disc 100 e is that it is displayed on the positioning mechanism 120e, such as the positioning mechanism 120 in FIG. 2, which is not a part of the substrate but forms its shape as a whole. Therefore, such an optical disc 100e is like the optical disc 100, and is not a flat disc shape, but a portion corresponding to the positioning portion has a protruding shape. This type of optical disc 100e has a drive mechanism 300 c which can be appropriately held as a fixed member. The drive mechanism 300 c has a shape corresponding to the fixed fiL mechanism 1 2 0 e and has the same shape as the moving mechanism 3 0 0 a and 3 0 0 b Different fixing portions 3 1 4c. As shown in Fig. 17, the fixed portion 3 1 4c includes a contact portion 3 1 6 c and a spring 3 1 8 c. The contact portion 3 1 6 c corresponds to the pushing shape of the positioning mechanism 1 2 0 e, and the shape of the contact portion 3 1 6 c is also a pushing shape. As shown, touch the inclined surface to fix the disc 100e. At this time, in order to make the contact portion 316c contact with high precision, a spring 318c is used. The spring 318c connects the main shaft 310c and the contact portion 316, and applies a force in a direction separated from each other. Since the main shaft 3 1 0 is fixed, the spring 3 1 8 c applies a force to the direction in which the contact portion 3 1 6 c is pushed upward. As a result, the leaf spring 3 28 c of the positioning portion 320 c is applied from the top to the bottom. When the force of the optical disc is fixed, the force of the disc and the force of the plate spring 3 1 8c repel each other, so that the contact portion 3 16c and the positioning mechanism 120e are in firm contact. Therefore, the disc 1 00e of -27- This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page). Packing --------- -Order ----% Printed by the Employees 'Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 A7 ___ B7 V. Description of the invention (26) The accuracy of the center and the rotating shaft system can prevent rotation eccentric. Here, if the force applied upward by the spring 3 1 8 c is greater than the force applied downward by the leaf spring 3 2 8 c, the optical disc 100a cannot be fixed by the positioning portion 320c. It is necessary to consider the selected department. Referring to FIG. 18, the drive mechanism 3 00d, which is another aspect of the example, will be described again. FIG. 18 is a diagram for explaining the relationship between the optical disc 100 of the present invention, and the drive mechanism 3 00d, which is the fourth embodiment. Exploded view. The driving mechanism 300d is different from the driving mechanisms 300a to 300c and includes a vacuum mechanism 340 for holding, fixing, and rotating. The vacuum mechanism 340 can vacuum-adsorb, fix and rotate the optical disc 100 of the present invention. According to Fig. 18, the vacuum mechanism 3 40 has a holding rotation portion 342, a vacuum space 3 44 and a base portion 346. The holding and rotating portion 342 includes a holding and rotating portion 342a that can be fitted into the positioning mechanism 120 of the optical disc 100, and a holding and rotating portion 342b that holds the outermost peripheral portion of the optical disc 100 (in addition, reference numeral 342 is a collective reference 3 42 a and 3 42b). The holding and rotating portion 342 is a member that rotates around the line indicated by the dotted line in the figure while holding the optical disc 100. For example, the holding rotating part 3 42 may be provided with a holding part and a rotating part separately. Further, as shown in the example, a configuration in which only the outer periphery of the optical disc 100 is held may be adopted. However, the holding rotation portion 3 42 has the holding rotation portion 3 42a, which can make the optical disk device and the optical disk have the same central axis of rotation accuracy, and has the advantage of preventing a reduction in recording and / or reproducing ability. The vacuum space 344 is formed by being surrounded by the optical disc 100, the holding rotation portion 342, and the base portion 3 4 6. The vacuum space 3 4 4 uses -28, which is not shown in the figure. This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) I ^^ installed --------- 1T --- -11 ---- line · (Please read the precautions on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 A7 B7 V. Description of the invention (27) Decompression pump was decompressed, To fix the disc 1 00. Such a vacuum space 3 44 can also be formed into the shape of a donut as shown in FIG. 18. If the holding rotation part 342 is provided only at the outer peripheral part, it may be formed on the entire lower surface of the optical disc 100. The base portion 346 has a path connecting the vacuum space 344 and the vacuum pump. After the optical disc is set in the holding and rotating portion 3 42, the air in the vacuum space 344 is sucked by this path and squeezed to fix the optical disc 100. At this time, the pressure in the vacuum space 344 is, for example, about 250 Pa. Further, the holding rotating portion 342 is provided only in the vacuum mechanism 340 of the outer peripheral portion, and a guide member for the optical disk 100 may be provided in order to align the rotation axis with the center of the optical disk. Although the preferred embodiments of the present invention have been described above. The present invention may have various modifications and changes within the scope of the gist thereof. For example, in this embodiment, although the description is made with reference to a rewritable optical disc, it may be the reproduction-only type described above, or an additional recording type, and the rewritable optical disc may be a photomagnetic recording type. Not to mention, the recording layer is not limited to the phase change type, and can be applied to a photomagnetic type, an open cell type, an alloy type, or a bubble type. In addition, as a recording layer dedicated to reproduction, a metal-based thin film having a large reflectance can be applied. The so-called open-hole type is a method in which the recording layer is melted with laser light, and the recording layer is perforated (pits) by surface tension to record signals, and the signal is reproduced by utilizing the difference in reflectance between the open-hole portion and the flat portion. . In the recording layer, organic pigment films such as Se-Te series alloy films, Te alloys (TeC, PbTeSb, etc.) and cyan blue are generally used. The so-called alloy type is a multilayer film alloy with laser light -29- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) J s ^ ----- 1. — ^ (Please read the notes on the back before filling this page) 571300

V. Description of the invention (28) (Please read the precautions on the back before filling this page) to record the signal, and then use the difference in reflectance between the alloy part and the non-alloy part to regenerate the signal. Compounds (Te0x, etc.) or Sb-Se / Bi-Te, etc. are used in the recording layer. The so-called bubble type is a method of recording signals by forming bubbles in the recording layer by irradiating with laser light, and then using the difference in reflectance between the bubble portion and the non-bubble portion to reproduce the signal. The organic film and the metal reflective film can be overlapped in two layers The film is used in a recording layer. In the following, a schematic configuration of a drive device (removable memory drive) 4 which is an example of interchangeability with the optical disc 100 and the drive device 300 of the present invention will be described with reference to FIG. 21. Here, Fig. 21 is a schematic block diagram of the driving device 400. Drive device 400 In this embodiment, it is an optical disc drive that is connected to the external device 500 of the embodied personal computer, and includes a control unit 4 100, a memory 520 read head 430, and a signal processing device 440. . The driving device 400 may include an input device such as a button or a keyboard (not shown), and a display device such as a liquid crystal display. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the control unit 4 10 controls the operation of the read head 430 and the signal processing device 440 under the control of the carcass stored in the memory 520. Here, regardless of the name of [body], it is called body stored in memory 520. The body includes: a utility program for executing 100 formatting of the optical disc; a utility program for reading the optical disc 100; a utility program for writing the optical disc 100; and a protective program for protecting management. The utility program and the protection program are programs provided by a manufacturer of the drive device 400 or a supplier commissioned by the manufacturer. According to this embodiment, the user can use the general format and the protection format. The protection program is not available. -30- This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 571300 A7 B7 V. Description of the invention (29) Users with proper authority are not only user data but also excluded For disc 100 access. The treatment of carcasses will be described in detail later. (Please read the precautions on the back before filling in this page) The reading head 4 300 reads the management data, protection data, and user data of the optical disc 100 and sends it to the signal processing device 440. However, as will be described later, when the read head 430 of this embodiment has protection data on the optical disc 100, the protection data or management data is controlled by the control unit 4 10 with the carcass stored in the memory 520. The first extraction, after performing the prescribed processing, allows the external device 500 to access user data, so the management data, protection data, and user data are not supplied to the signal processing device 440 and the signal processing device 440 In order to connect to the SCSI interface 512 of the external device 500, management data, protection data, and user data can be demodulated to extract the original information. The external device 500 has a PCI bus 510; a SCSI interface; an IDE bus 514; a main memory 5 20; a control unit 5 3 0; a hard disk drive 540; a removable memory drive 5 5 0; a removable memory 552; and the display. The removable memory 552, the optical disc 100, and the removable memory driver 5 50 and the drive device 400 may be the same. The Intellectual Property Bureau employee ’s cooperative of the Ministry of Economic Affairs prints PCI bus 5 10, SCSI interface 512, and IDE bus 514 are known in the industry, and detailed descriptions are omitted here. The main memory 520 includes, for example, RAM or ROM. The program required for the operation of the control section 5 3 0 is temporarily loaded by the hard disk 4 40, and the input from input devices such as a keyboard, a mouse, a joystick (not shown) is temporarily stored, and necessary for system operation is stored. Information, the control section 5 3 0 controls the operation of each section, and the hard disk 440 is stored -31-This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 571300 A7 ___________ B7 V. Description of the invention (30 ) Programs (various drivers) necessary for the operation of other parts of the operating system such as WINDOWS98, removable memory drive 5 50 and removable memory 552 can be used to record and reproduce user data. The display is, for example, CRT The display is composed. [Effects of the Invention] According to the optical disc as an example of the present invention, a larger recording area on the optical disc can be increased by not providing a through hole belonging to a non-recording area. It is easy to form a recording layer and a protective layer, so that cost reduction and working time can be reduced, and because the positioning mechanism is provided, the rotation centers of the optical disc device and the optical disc have high accuracy and consistency, and can prevent a reduction in the recording and / or reproducing ability. According to the injection molding metal mold, the injection molding machine, and the molding method which are examples of the present invention, a hot cross flow path can be provided to easily form a disc without a through hole. Therefore, the process of drilling is saved, the manufacturing process can be simplified, and because the connection part for molding the holding device is formed on the injection molding die, the molding substrate is not dropped by the injection molding machine, and the mold can be easily demolded from the injection molding machine. . According to the optical disc drive mechanism as an example of the present invention, even a disc having a recessed portion instead of a through hole can be driven by a spindle and a positioning portion. Therefore, even a small-sized optical disc having a large recording area can easily drive the recording area by the mechanism itself. According to the optical disc drive mechanism which is another aspect of the present invention, even a disc without a through hole can use the magnetic or vacuum function. Only -32- This paper standard applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling out this page) Clothing ------- Order --------- Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 A7 B7 V. Description of the invention (31) (Please read the precautions on the back before filling this page) It is driven by one side of the disc. Therefore, such a mechanism, particularly when laser light is radiated from above the optical disc, can be used even if the entire optical disc is almost a recording area, and a larger recording area can be enlarged. [Brief Description of the Drawings] Fig. 1 is a top view of an optical disc in one aspect as an example. Fig. 2 is a cross-sectional view for explaining the laminated structure of the optical disc of Fig. 1; Fig. 3 is a sectional view showing the shape of an optical disc substrate having a first aspect as an example. Figure 4 is a cross-sectional view showing the shape of a disc substrate having the second aspect as an example. Fig. 5 is a cross-sectional view showing the shape of a disc substrate having the third aspect as an example. Fig. 6 is a sectional view showing the shape of an optical disc substrate having a fourth aspect as an example. Fig. 7 is a schematic cross-sectional view of an injection molding machine as an example of the present invention. Fig. 8 is an enlarged view of a main part of the movable mold 220 for forming a convex holder. Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 9 is an enlarged view of the main part of the movable metal mold used to form a concave holding device. Fig. 10 is a cross-sectional view showing an injection molding machine before the molten resin M is filled. Figure 11 is a cross-section of an injection molding machine showing that molten resin M has been injected. -33- Paper size applies Chinese National Standard (CNS) A4 (210 X 297 mm) " 571300 Α7 ____ Β7 V. Description of the invention (32 ) Surface map. Fig. 12 is a sectional view showing an injection molding machine at the time of mold opening. Brother 13 is a cross-sectional view of an injection molding machine when the substrate is loose and the mold is not formed. Figure 14 is a schematic block diagram of injection molding with an injection molding machine. Fig. 15 is a schematic sectional view showing the structure of a driving mechanism as an example of the present invention. Fig. 16 is a schematic cross-sectional view showing the structure of a drive mechanism as a second aspect of the present invention as an example. Fig. 17 is a schematic cross-sectional view showing the structure of a drive mechanism as an example of the third aspect of the present invention and an optical disc. Fig. 18 is a schematic exploded view for explaining the relationship between the drive mechanism of the optical disc 100 of the present invention and an example of the fourth aspect. Fig. 19 is a schematic cross-sectional view showing an optical disc drive mechanism in one aspect as an example. Fig. 20 is a schematic block diagram of a driving mechanism. Figure 21 is a schematic block diagram of the drive mechanism. Fig. 22 is a sectional view showing the structure of a conventional optical disk substrate. [Explanation of Symbols] 100 Disc 110 Substrate 130 Holder 140 Recording Layer -34- This paper size applies Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) -------- IIII I --- ^ I Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 571300 A7 B7 V. Invention Description (33) Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 150 Protective film 200 Injection molding machine 200A Injection molding unit 210 Fixed mold 220 Movable mold 230 Printing section 240 Resin conveying section 250 Heating unit 260 Loosening section 270 Control section 280 Temperature adjustment device 290 Injection unit 295 Servo motor for fixed mold 300 Drive mechanism 310 Spindle 320 Positioning section 330 Object lens 340 Vacuum device 400 Optical disk device 410 Control section 420 Memory 430 Single head 440 Signal processing device 500 External device -35- τ ---------- install ----- --- Order --------- (Please read the notes on the back before filling in this page) This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

Claims (1)

571300 VI. Patent Application No. 89 1 27 67 5 "Recording medium, injection molding metal mold and injection molding machine, forming method, and driving mechanism of the recording medium" Patent Application (Amended on March 13, 1992) Λ Application Scope of patent: 1. A recording medium comprising: a dish-shaped substrate without a through hole; and a recording layer provided on the substrate to form a recording area, and the recording medium is connected to a driving section for driving the recording medium. And the recessed part with the function of positioning with the central axis of rotation of the driving part. 2 · If the recording medium of item 1 of the patent application scope, the recording medium is an optical disc on which information is recorded and / or reproduced by light. 3. The recording medium according to item 1 of the patent application scope, wherein the recording medium has a holding device that prevents the substrate from falling during injection molding. 4 · The recording medium according to item 1 of the scope of patent application, wherein the concave portion is tapered. 5 · The recording medium according to item 1 of the scope of patent application, wherein the recording layer is convex. 6. The recording medium of claim 3, wherein the holding device is formed on the same surface as the recording area. 7. The recording medium according to item 3 of the patent application scope, wherein the holding device is formed in the recess. 8. The recording medium according to item 6 or 7 of the patent application scope, wherein the holding device has a shape of a convex portion or a concave portion. 9 · An injection molding metal mold having a first metal mold and a first metal mold 1-571300. 6. A second metal mold defining a cavity for molding is included in the scope of the patent application. The dish-like substrate with a through hole and the recording medium provided in the recording area of the substrate are characterized in that the first metal mold has a convex portion formed with a concave portion on the substrate, and the concave portion has a driving mechanism for driving the recording medium. The first and second metal molds are provided with a connection part, which is used to prevent the substrate from falling when the first and second metal molds are opened. A holding device is formed on the substrate. 10 · If the injection molding metal mold of item 9 of the patent application scope, wherein the connecting portion is provided on the first metal mold, the connecting portion is provided on the convex portion of the first metal mold. 1 1 · If the injection molding metal mold of item 9 or 10 of the patent application scope, wherein the connecting portion has the shape of a convex portion or a concave portion. 1 2. An injection molding machine comprising: an injection molding metal mold, a first metal mold, and a second metal mold defining a cavity for molding in cooperation with the first metal mold to form a mold including a non-penetration A dish-like substrate with holes and a recording medium provided in a recording area of the substrate; an injection unit that introduces a molten material into the cavity via a conveying path; and a model clamp mechanism that moves the first or second metal mold, which is characterized by: : The first metal mold has a convex portion in which a concave portion is formed on a substrate, and the concave portion has a function of connecting with a driving portion for driving the recording medium, and a positioning function of a rotation axis of the driving portion. The first or The second metal mold is provided with a connecting pin, which is used to prevent the substrate from falling when the first and second metal molds are opened. -2--571300 Sixth, the scope of the patent application holding device is formed on the substrate. 1 3 · If the injection molding machine according to item 12 of the patent application scope, wherein the connecting portion is provided in the first metal mold, the connecting portion is provided in the middle of the convex portion of the first metal film > Lj. 1 4 · If the injection molding machine according to item 12 or 13 of the scope of patent application, wherein the connecting portion has a shape having a convex portion or a concave portion, the convex portion has a shape that is embedded in the concave portion or convex portion of the connecting portion. 15. The injection molding machine according to item 12 of the patent application scope, wherein the injection molding machine further has a heating unit of a hot cross runner method or an extended nozzle method. 16. A molding method comprising: an injection molding metal mold having a first metal mold and a second metal mold opposed to the first metal to form a dish-shaped substrate including no through-holes; and A recording medium in a recording area of the substrate; an injection unit that introduces a molten material into the cavity via a conveyance path; and a model clamp mechanism for moving the first or second metal mold, comprising: a first metal mold and a first metal mold; 2 The process of combining metal molds to form a cavity; the process of filling the cavity with the molten material forming the substrate through a conveying path; the convex portion provided on the first metal mold will have The process of connecting the drive part of the media with the recessed part of the rotation center axis positioning function of the drive part is formed on the substrate; the first and second metals are connected according to the connection part provided on the first or second metal mold. When the mold is opened, a holding device for preventing the substrate from falling is formed on the substrate; and cooling the interior of the cavity to solidify the molten resin-571300 VI. The process of patent application scope; and the first The mold opening process of the metal mold and the second metal mold 〇 1 7 · The forming method according to item 16 of the patent application scope, in which a heating unit with a thermal cross runner method or an extended nozzle method is used to heat the conveying path to prevent the The process of solidifying a molten material. A driving mechanism comprising: a rotating portion that rotates a dish-shaped substrate without a through hole; and a supporting portion that rotatably supports the recording medium. 19. The driving mechanism according to claim 18, wherein the recording medium has a recess in which the rotating portion is partially inserted. 20. The driving mechanism according to item 18 of the scope of patent application, wherein the supporting portion is formed by a vacuum adsorption mechanism. 21 · If the driving mechanism of the 18th scope of the patent application, the support part has a magnetic coil. 22. A recording device comprising: a drive mechanism for driving a recording medium; and a reading head for recording or / and reproducing the recording medium; and a signal connected to the reading head and processing the output of the reading head The processing device is characterized in that the driving mechanism includes a rotating portion that rotates a dish-shaped substrate without a through hole, and a supporting portion that rotatably supports the recording medium. 2 3 · The recording device according to item 22 of the patent application scope, wherein the reading head is an optical reading head that records and / or reproduces information optically. 24. The recording device according to item 22 of the patent application, wherein the recording medium has a recess in which the rotating portion is partially inserted. 25. The recording device according to item 22 of the scope of patent application, wherein the support unit is -4-5713001300, and the scope of patent application has a vacuum adsorption mechanism and / or a magnet. 26. The recording device according to claim 22, wherein the reading head is provided on the opposite side of the rotating portion with respect to the recording medium. -5-