TW200944356A - Mold for forming disc, isolation member for mold, disc substrate and method for forming the same - Google Patents

Abstract

The present invention provides a mold for forming a disc, which can prolong the lifespan of a compression mold (61) and reduce the cost of a disc substrate (B1) and includes: a first and a second mirror surface disk; a compression mold is installed on one of the mirror surface disk; an internal compression mold carrier using an internal rim periphery for restricting the compression mold (61); a mold isolation component (21) consisted of a planar sheet body and using the external rim periphery thereof for restricting the compression mold (61) and the end of internal rim periphery thereof to form a portion of the external rim periphery of the mold cavity space (C); and a mold cavity ring (37) installed on another mirror surface disk, in which the end of internal rim periphery thereof forming a portion of the external rim periphery of the mold cavity space (C). A protrusion part is formed on the compression mold (61) side in the internal ring side of mold isolation component (21) and is pointing towards the mold cavity space (C). Since the chamfer (q1) is formed on the surface side of the disc substrate (B1), no bump(s) will be formed on the disc.

Description

[Technical Field] The present invention relates to a mold for forming a disk, a spacer for a mold, a disk substrate, and a method of forming the same. [Prior Art] In a conventional injection molding machine for forming a disk substrate, a molten resin in a cylinder is filled in a cavity space in a mold for forming a disk, in the cavity space The resin is cooled and solidified to form a disc substrate. To this end, the injection molding machine has a die for forming a disk, an injection device, and a mold clamping device, wherein the die for molding the disk is a mold assembly on a fixed side and a mold assembly on a movable side. The above-described injection device is for filling the resin into the cavity space, and the mold clamping device is a mold assembly for detaching the movable side with respect to the mold assembly on the fixed side. Further, by the above-described mold clamping device, the movable mold assembly can be moved forward and backward, and the mold for mold for forming the mold can be closed, mold-locked, and opened, and at the time of mold clamping, the mold set on the fixed side. A cavity space is formed between the plate and the disk plate of the movable side mold assembly. Further, the injection device includes a heating cylinder, an injection nozzle, and a screw (SCreW), wherein the injection nozzle is disposed at the crucible end of the heating red, and the screw cup is rotatably and freely advancing and retracting. Inside. Then, in the - metering step, the above screw is rotated to dissolve the resin

2088-9610-PF 5 200944356 is stored in front of the screw, and y yokes the screw # backward, during which the mold for mold clamping and mold clamping, μ, +, and then, in the injection step The screw is advanced, and the resin stored in the upper side of the screw is ejected from the injection nozzle, and is filled into the cavity space via a sprue of the disc forming mold. However, in the cooling step, the resin in the cavity space is cooled and subjected to a punching process, and the disk is formed and the substrate is formed. Next, mold opening is performed, and the above-mentioned disc substrate is taken out. Fig. 1 is a conceptual diagram showing the necessary parts of a mold for forming a disc. In the drawings, 12 is a mold assembly on the fixed side, and 32 is a mold assembly on the movable side, and a mold for forming a disc is formed by the mold assemblies 12 and 32 by soil, @ a . In addition, 16, 36 are disc plates, and 37 is a cavity ring (cavity Γ 1 = ). In the mold assembly 12 on the side of the mold, a stamper 61 for forming a fine pattern on the disc substrate B1, the writing surface, and the information surface is mounted on the disc plate 16 And in the movable side mold assembly 32, the cavity ring 37 is mounted to the disc plate 36, and the outer ring edge of the cavity space c is formed by the cavity ring 37. When the resin filled in the cavity space c is in contact with the die for forming the disk, the mold cavity is cooled, and the volume of the cavity space C becomes small; since the portion of the outer ring edge close to the cavity space C is the outer ring edge. The ministry will cool rapidly, so the volume will become smaller. As a result, the outer ring edge of the disc substrate M is slightly raised in the axial direction to form a ridge (ski jump). In this case, the reflective film is laminated on the disc substrate B1. Layer

a product manufactured by 2088-9610-PF 6 200944356 light layer), that is, a Blu-ray disc or the like, on which a ridge portion corresponding to the above-mentioned ridge portion is formed, and the above-mentioned light is viewed in the optical device and is to be read. When writing data (information), there is a danger that the read head, the write head, etc. will come into contact with the ridge. Further, when the coating layer is laminated by spin coating, the liquid accumulates in the outer ring edge portion, and similarly, the ridge portion is formed on the optical disk. ❹ Here, a mold for forming a disc has been disclosed, which is formed at the edge portion of the outer ring of the cavity space, and a step is formed in the mold for forming the disc, so that the stamper is placed in the step and the cavity space is made. The purpose of thinning is to prevent the outer ring edge portion of the disc substrate from rising (for example, refer to Patent Document i). [Patent Document 1] JP-A-2003-1 1 1 80 SUMMARY OF THE INVENTION [Problems to be Solved by the Invention] However, in the above-described conventional mold for forming a disk, the surface of the die is directly contacted by the step surface. Forming the ground is accompanied by wear on the back side of the stamper, which shortens the life of the stamper. As a result, the cost of the disc substrate is increased. An object of the present invention is to provide a mold for forming a disc, a spacer for a mold, a disc substrate, and a method for forming the same, and it is possible to solve the problem of the above-mentioned conventional mold for forming a disc. The cost of the board. The L-long stamper can reduce the disc base. [Means for Solving the Problem] In view of the above, the disc forming mold of the present invention has a mirror plate and a second mirror plate. In the above second:: disc free advance and retreat; a stamper (stamper), installed in the first 2 * mirror

208 8-9610-PF 7 200944356

One of the faceplates is a mirror plate; the inner die holder (in the heart of the mold), the inner die is constrained at the inner ring edge, and is mounted on the above-mentioned one of the mirror plates... the mold spacers' It is formed by a flat plate-like body, and the above-mentioned stamper is restrained at the outer ring edge, and the end face of the inner ring edge constitutes a portion of the outer ring edge of a cavity spaee, and is installed in the above- And a cavity ring opposite to the mold spacer, wherein an end surface of the inner ring edge constitutes a portion-of the outer ring edge of the cavity space and is mounted to the other mirror disk. On the other hand, in the inner ring surface of the above-mentioned mold spacer, the portion on the side of the stamper is opened to form a projection and directed toward the cavity space. Advantageous Effects of Invention According to the present invention, in a mold for forming a disk, a first mirror disk '-second mirror surface' is disposed to advance and retreat with respect to the first mirror disk; a stamper is mounted One of the mirror plates of the first and second mirror plates; an inner die holder that constrains the stamper at an inner ring edge thereof and is mounted on one of the mirror plates; a mold spacer is flat a plate-like body formed by constraining the stamper at an outer ring edge thereof, and an end surface of the inner ring edge forming a part of an outer ring edge of a cavity space, and being mounted to one of the mirror plates; and a cavity ring And facing the above-mentioned mold spacer, the end surface of the inner ring edge constitutes a part of the outer ring edge of the cavity space, and is mounted on the other mirror disk. On the side of the inner side of the inner ring surface of the above-mentioned mold spacer, a portion is formed as a dog portion and directed to the cavity space. In this case, since the protruding portion is formed in the inner ring of the spacer for the mold

2088-9610-PF 8 200944356 The surface side ridge of the edge portion of the side of the die on the side of the die. Therefore, it is not the case. The part is formed and the corner portion is formed in the cavity of the cavity, and the reading head and the recording occur, and the outer portion of the disk substrate does not contact the ridge portion in the form of the optical disk forming head, etc., since it is not necessary to be in the stamper. The fj month unloads to form a step, and extends the life of the stamper. As a result, the cost of the ruthenium substrate can be reduced by r ^ $. [Embodiment] [Best Mode for Carrying Out the Invention]: The above and other features, advantages and advantages of the present invention will become more apparent and pure, and the preferred embodiments will be described hereinafter with reference to the accompanying drawings : β 2: '- and with reference to the drawings, the description of the embodiment of the invention is made. In this case, the disc molding die will be described, and the disc substrate is molded to form a molded article. ^ is a partial cross section of a mold for forming a disk according to an embodiment of the present invention

3 is an enlarged view showing a necessary portion of a mold for forming a disk according to an embodiment of the present invention. In the drawing, '12 is a fixed-side mold assembly, which is used as a first mold' by a bolt (_) shown in the drawing, and is attached to a fixed platform not shown in the drawing; 32 is a movable side The mold assembly is used as a second mold: a movable platform (not shown) is mounted on a movable platform (not shown) by a bolt (not shown), and its configuration can be freely advanced and retracted together with the movable platform. The mold for molding a disk is constituted by the above-described mold assemblies 12 and 32. The mold assembly 12 has a bottom plate 15 as a first support

2088-9610-PF 9 200944356 plate; a disc plate 16 as a first mirror plate, which is fixed to the bottom plate 15 by bolts bu; and a spruebushing 24, which is disposed adjacent to each other An iQeating ring 8 forms a main runner 26 at the front end of the shampoo jacket 24 (end portion on the side of the mold assembly 32), which communicates with a die 28 for the drawing. The resin as a molding material which is emitted from the injection nozzle of the injection device is passed, and the resin in the embodiment is polycarbonate (polycarb〇nate), and the bottom mold 28 is formed to face the crucible.

Cavity space C. The above-mentioned injection device has: a heating j not shown in the drawing as a cylinder member; an injection nozzle mounted to the front end of the heating cylinder; and a screw 'disposed in the heating cylinder and Free to turn, advance and retreat freely. The stamper 61 is mounted on the disc plate to be thermally disposed, and a plate is used to form a concave-convex shape (groove, pit, etc.) on the information surface of the disc substrate. a fine pattern; and an inner side of the front half of the sprue bushing 24, an inner stamper holder 14 is provided for controlling and restraining the inner circumference of the stamper 61. Cartridge and die restraint. In addition, an annular protruding contact ring 18, an annular mold spacer 21, and an annular spacer restraining ring 22 as a restraining member are mounted by bolts and mounted on the disc plate. The outer ring edge of 16. Therefore, the outer ring edge of the disc plate 16 is formed with an annular notch 23, and the protruding contact ring 18 is disposed at the notch 23. The above-mentioned mold spacer 21 is formed of a thin, flat plate having a thickness thinner than the cavity space c, and is mounted with the front surface S1 facing the mold set.

2088-9610-PF 10 200944356 The body 32 is—the side and the back S2 facing the disc plate ^6. In the side half, the outer ring edge of the waste mold 61 is controlled and restrained. Further, the mold member 21 is attached to the front end surface S3 of the diameter ring 18. "Direct contact with the protruding contact is also such that the spacer confinement ring 22 is disposed such that it faces the side of the mold assembly 32, and the back surface S5 directly contacts the front side of the radially outer half of the spacer 21 for use. The (four) edge of the above-mentioned mold detaching member 21 is positioned by the protruding contact ring 18 and disposed on the radially inner side, and the outer ring edge of the cavity space C is formed by the end face % of the inner ring edge. The other part of the confinement ring 22 is arranged such that the inner ring edge is located in the vicinity of the protruding contact ring:: the inner ring edge, and the mold is controlled by the spacer 21 to contact the ring 18. Therefore, by isolating In the state where the restraining ring 22 restrains the die member 21, the mold spacer 1 has a function as a die holder other than the die restrainer, and the outer ring edge plate 16 of the stamper 61. Then, A first guide ring 19' in the radial direction (four) of the disc plate 16 and the protruding contact ring 18 is attached to the bottom plate 15 by a bolt b2. In another aspect, the mold assembly 32 has a bottom plate Μ, an intermediate plate 4〇, a disc plate 36, a cylinder 83 And a cut PUnch 48. The intermediate plate 40 is mounted on the bottom plate 82' by a bolt μ2 as a second support plate; the disk plate 36 is mounted to the intermediate plate by bolts. 40, as a second mirror disk; cylinder 2088-9610-PF 11 200944356 body 83 is mounted in the bottom plate 82 facing the movable platform, and is mounted to the intermediate plate 4 by bolts bl3; The device 48 is provided to be movable forward and backward along the cylinder 83, and has a tip end (end portion on the side of the mold assembly 12) having a shape corresponding to the bottom mold 28. In the cylinder 83, an integrally formed convex portion is formed. A flange 84 is detachably attached to the rear end of the cutting punch 48, and a cutting punch returning spring 85 as a returning member is disposed in front of the flange 84. The punching-resetting spring 85 is used to return the flange 84 to the rear. An annular cavity ring 37 is mounted in the outer ring edge of the disk plate 36 relative to the disk. The plate 36 is freely movable and is constrained from the protruding contact ring 18, the mold spacer 21, and the spacer. 22 is opposite. On the radially outer side of the disc plate 36 and the cavity ring 37, the annular second guide ring 38 is attached to the intermediate plate 4〇 by the bolt bl4, and is made to be the first guide. The ring 19 is opposed to the disk assembly 36 by the spring 86 as a return member, which is returned toward the side of the mold assembly 2, and is freely movable relative to the disk plate 36. The cavity ring 37 is in the forward limit position, and is incapable of proceeding by the specification of the cavity % restrainer 87 so that the inner ring edge coincides with the inner ring edge of the mold spacer 21; and the configuration of the cavity ring 37 It is made to protrude slightly from the front end surface of the disc plate 36 (the end surface on the side of the mold assembly 12), and the end surface S7 of the inner ring edge constitutes a part of the outer ring edge of the cavity space c. On the outer ring edge of the disc plate 36, a notch 39 for mounting the cavity ring 37 is formed.

2088-9610-PF 12 200944356 8. In order to bond the mold assembly 32 to the mold assembly i2, the mold clamping device is not provided in the drawing. The mold and the assembly 32 are advanced or retracted by driving the mold clamping cylinder of the boat portion of the boat for mold clamping as the above-mentioned mold clamping device, and the mold is closed. The mold, M and the mold opening 'and form a cavity space C between the disk plates 16, 36 during the clamping process. In addition, at the time of mold clamping, the above-mentioned flange 84 is advanced by driving the driving red, which is not shown in the drawing of the driving portion for punching, to cut the punching. The device 48 advances to create the Dasong ^ into the bottom mold 28. As a result, the resin in the cavity space C described above is subjected to punching. The first and second temperature control flow paths 88 and 89 are formed in the disc plates 16 and 36, and the temperature control medium such as water, oil or air is supplied to the first and the first of the respective The temperature control channels 88, 89 are used to cool the disk plates 16, 36. Then, in a measuring step, the screw is rotated to dissolve the resin and stored in the front of the screw while the screw is retracted, and the mold for mold for forming the disk is closed and clamped. Next, in the injection step, the screw is advanced, and the resin stored in front of the screw is ejected from the injection nozzle and filled into the cavity space c. In the cooling step, the cavity space is then used. The resin inside is cooled, and the τ 丨丄 is ordered to be punched, and the disc substrate is formed. Next, the mold is opened, and the above-mentioned disc substrate is taken out. Further, in the above-described mold for forming a disk, the resin-joining-disc molding mold filled in the cavity space C is cooled, and the current volume of the cavity space c becomes small; since the cavity space C is approached Part of the outer ring edge

2088-9610-PF 13 200944356 That is, the edge of the outer ring will cool rapidly, so the volume will become smaller. This sentiment ^CD ^ training (four) will be the edge of the wire to the bulge, (four) the beginning of the New Zealand (skip jumping; ski jump). Thereafter, a Blu-ray squeegee substrate laminated reflective film manufactured by a ruthenium coating layer (transparent layer) or the like, and a disc such as a light-preserving disc are placed on the ridge portion. When the above-mentioned optical disc is placed in the audio-visual machine, the read head, the recording head, and the like may come into contact with the ridge portion when reading or writing data (information). Once the liquid volume is present, the recording head, etc. will be defective.

Further, when the coating layer is laminated by the spin coating method, the ridge portion is formed at the edge portion of the outer ring, and the reading head is in contact with the ridge portion in the same manner. Here, in the present embodiment, the portion on the side of the stamper 61 of the inner ring edge of the above-mentioned mold spacer 21 is projected toward the cavity space c. Figure 4 is a conceptual diagram, to be in the name of the thousand. Also, the display state of the disc substrate of the embodiment of the present invention is shown. Fig. 5 is an exploded perspective view of a necessary part of the mold for forming a disc according to the embodiment of the present invention. In the drawings, '12 is a mold assembly on the fixed side, and 32 is a movable mold assembly'. The mold assembly 12 and 32 constitute a mold for forming a disk. In addition, 16, 36 are disc plates, and 37 is a cavity ring. In the mold assembly 12 on the fixed side, a stamper (3 "hands-on") 61 for forming a fine pattern on the data writing surface of the disc substrate β1, that is, the information surface, is attached to the disc plate 16 And configuring the cooker spacer 21 for restraining the above-mentioned stamper η; and in the movable side mold assembly 32, the cavity ring 37 is mounted on the disc plate 36, and is isolated by the above mold The piece 21 and the cavity ring 37 form the outer ring edge of the cavity space c.

2088-9610-PF 14 200944356 The portion on the side of the stamper 61 of the inner ring edge of the above-mentioned mold spacer 21 is projected into the cavity space c to form a projection η. The end surface s6 of the inner ring edge of the above-mentioned mold spacer 21 extends in parallel from the point p at the intersection with the front surface S1 and the axial direction of the side opposite to the mold assembly 12, starting from the predetermined point p2 toward the mold. The cavity space c out 'ends a point at the predetermined point p3 near the back surface S2, and the point from the point to the back side S2 is again? 4 so far as to extend parallel to the axial direction of the side pointing to the mold set. In the present embodiment, 〇d3 is..., * in the present embodiment, the portion from the above point P2 to the point P3, that is, the shape of the projection is formed into a curved-circle-part portion. It can be expressed by a given function such as a line, a curve, or the like: Further, in Fig. 5, in order to explain the above, the portion up to the point f P4, that is, the cut portion is formed to be parallel to the axial direction; however, in the present embodiment, the above point nq 5 ¥1· The formation of the portion from the point C3 to the point p4 is an extension from the point P2 to the point p3. In the mold for forming a disk, the distance from the point W to the point 〇 "", the distance of the shaw, that is, the thickness dl of the mold spacer 21 is: 〇.8[nHn]^dl^l.〇 [min] The distance in the axial direction from point P2 to point p4, that is, the height d2 of the protrusion is: 3〇Um] "2si2〇["] The distance in the axial direction from P3 to point P4, that is, the height of the front end d 3 is: 〇Sd3S20["m]. And the radial distance from the point P2 to the point p3, that is, the protrusion

2088-9610-PF 15 200944356 The length eO is: 30[//m]Se0S100[/im]. Further, the radial distance from the center of the disc substrate B1 to the point pi 1 on the outermost edge of the information surface, that is, the information plane radius el is: el and 55.8 [mm]; from the above point pi 1 The radial distance to the outer ring edge of the disc substrate B1, that is, the outer ring portion width e2 is: e2 ^ 1.5 [mm] ® ; from the corner portion q1 to the point pi 2 to the outside of the disc substrate B1 The radial distance up to the edge of the circle, that is, the length e3 of the chamfered portion is: 30 [/zm]^e3^100 [/im] : radial direction from the point pi 2 to the point pi 3 of the upper end of the chamfered portion q1 The distance, that is, the height of the corner is d4: 30[/zm]^d4^120[/zm]. Further, the height d2 of the projection is equal to the height d4 of the chamfer portion, and the length e0 of the projection portion is equal to the length e3 of the chamfer portion. The thickness of the disc substrate B1 (5 is: 5 and 1.1 [mm]. Thus, the projection f1 is formed on the side of the stamper 61 of the inner ring edge of the above-mentioned mold spacer 21, and the disc is formed. The portion on the information surface side of the outer ring edge of the sheet substrate B1 forms a chamfered portion q1. The above-described chamfered portion q1 is formed by processing at an angle of 45°, and the portion from the point p2 to the point p3 is represented by a straight line; The processing method of the rounded corners forms the above-described chamfered portion q 1 , and the portion from the point p 2 to the point p3 is represented by a curved line (R portion). 2088-9610-PF 16 200944356 Two resin even if filled in the cavity space. The two forming molds are rapidly cooled by contact with the mold, and the outer ring edge portion of the disc base (4) is bulged in the axial direction, and the ridge portion is still not formed. The optical layer is equal to the second' by laminating on the disc substrate B1. The optical disk manufactured by the reflective film, the cladding layer (transparent layer), or the like does not have a ridge portion formed thereon. In the present embodiment, the height of the above-mentioned chamfered portion is 3 〇 [/im] ^ d 4 ^ 120 [ /zm] ❹ ; The length of the groove portion e3 is 3〇[ #m]S e3 Each l〇〇[# m] surface ST is described as being very small in the corner portion Q1. The information quantity "M is increased" can increase the amount of information stored in the optical disc: in the case where the chamfering portion Q1' is to be formed by the spin coating method, due to the chamfering portion ql The presence of the cladding layer becomes smaller only in the portion of the radially inner portion of the predetermined divergence, but since the formed chamfered portion q1 is small 'relatively, the thickness of the cladding layer can be checked. Corresponding to the above-mentioned protrusions ", the part on the side of the disc: the edge of the board B (four) information surface forms ql. The decoupling part of # u # Next, the manufacturing method of the Blu-ray disc is in the Blu-ray disc, The method for forming the Blu-ray disc of the embodiment of the present invention is to form the information surface of the disc substrate B1, which is the front side of the disc substrate, and the information surface of the disc substrate B1 is not formed. .

2088-9610-PF 17

〇200944356 As shown in the figure, in the step (the mold forms the disc substrate B1. The forming of the disc is formed by yttrium plating to form H (b) +, the metal of the material, the film... in step: in: [ (4) In the reverse of the metal thin film, by coating a thin sheet made of a light-transmissive thin film, a coating of a blue light disc (5) composed of Danlian is formed. In this case, since the chamfered portion q1 is formed at two portions of the outer ring edge of the disc substrate B1, a portion corresponding to the cladding layer k2 is formed; and the chamfered portion q2 is also formed. Therefore, since the embossed portion is not formed in the Blu-ray disc and the optical disc is placed in the viewing device and the data (information) is to be read or written, the read head, the write head, and the like do not come into contact with the ridge portion. . Further, since the chamfered portion q1 is formed on the outer peripheral edge portion of the clad layer k2 by covering the chamfered portion q1 of the disc substrate B1, the peeling strength of the clad layer k2 can be improved. In addition, in the case of having the ridge portion, generally, the outer ring edge portion of the coating layer k2 is likely to be in a non-uniform state; however, in the present embodiment, the package can be produced due to the formation of the chamfer portion q1. The edge of the outer ring of the coating k2 is stable. Further, since it is not necessary to form a step on the back surface of the stamper 61, the molding is repeated. The back surface of the stamper does not wear, and the life of the stamper can be prolonged. As a result, the cost of the disc substrate can be reduced. In the present embodiment, although the coating layer k2 is formed by coating the above-mentioned primary sheet, the coating layer k2 may be formed by applying a resin such as an ultraviolet curable resin by a spin coating method. 2088-9610-PF 18 200944356 Fig. 7 is a view showing another manufacturing method of the Blu-ray disc of the embodiment of the present invention. ❹

As shown in the figure, in the step (a), the disc substrate B1 is formed by the above-described disc forming mold; in the step (b), a metal such as aluminum is used, and the thickness is formed by sputtering. a reflection film k1 composed of a metal film of several tens [em]; in the step (c), a resin such as an ultraviolet ray curing resin is applied by a spin coating method, and is cured by irradiation with ultraviolet rays to form a thickness of about 0. .Umm] cladding layer k3. Thereby, a Blu-ray disc can be formed. In this case, since the four corners on the side of the front surface of the outer ring edge portion of the disc substrate B1 form the chamfered portion q1, even the resin of the ultraviolet curable layer coated by the spin coating method is on the disc substrate B1. The edge portion of the outer ring is piled up, and a slight decorner portion (10) is formed in the portion corresponding to the cladding layer k3. Therefore, since the Blu-ray disc does not form a ridge. Next, a description will be given of a method of manufacturing a suitable Blu-ray disc for manufacturing a multilayer film Blu-ray disc as a compact disc. 8 is a second diagram showing another manufacturing method of the Blu-ray disc of the embodiment of the present invention, showing a second aspect of the other manufacturing method of the Blu-ray disc of the embodiment of the present invention. As shown in the figure, in the step (a), the τ fine is formed by the disc forming mold composed of the upper crucible; in the step (b), the metal such as aluminum is used, and sputtering is performed. The method forms a film k1 composed of a metal thin crucible having a thickness of +35 [Am]; in the step C[C), a thickness of several tens [V m] is applied by a spin coating method. Resin, forming the middle layer dozens

Thereby, a laminated body 70 composed of a certain R reflective film k1 and an intermediate layer k4 m of the disk is formed.

2088-9610-PF 200944356 In this case, since the first information sheet is formed on the dish ', the sheet substrate B1, and the edge of the sheet is immersed on the outer edge of the sheet substrate B1. The portion on the front side of the P forms the chamfered portion q1'. Even if the resin coated by the spin coating method is deposited on the outer peripheral edge portion of the disc substrate B1, it is still in the portion corresponding to the intermediate layer k4 of the towel π. A slight chamfered portion q5 is formed. Next, a second information surface is formed on the surface of the intermediate slaughter k. Then, in the step (d), the surface of the intermediate layer u ❹ layer k4 is opposed to the stamper 71, and the laminate 70 is pressed against the stamper 71, ^, to the second information surface of the intermediate layer k4. A fine pattern composed of irregularities is formed. In this case, if there is a slight ridge on the outer edge of the outer surface of the substrate B1 in the case of the disc, the outer edge portion of the interlayer k4 of the reflective film k1 盥 ® u u u Μ τ 亦 亦, and the intermediate layer k4 u甩K4 embossing mold 71 which is raised at the edge portion of the outer ring is in contact with each other, and the fine pattern with good precision is obtained by the method. The phase is, for example, the shape is small, in this embodiment, Since it is possible to prevent a slight ridge from being formed at the edge portion of the outer ring of the disc substrate B1, the waste mold 7 can be installed with good precision to stabilize the topographic pattern. Next, in step (e), the layer is layered. The integrated body 70 is detached from the stamper 71. When the chamfered portion q5' is formed on the surface on the side of the outer peripheral edge portion of the intermediate layer k4, the laminated body 7〇 can be easily separated from the stamper. In order to cover the chamfered portion q1 of the disc substrate B1, a chamfer is also formed at the outer peripheral edge portion of the intermediate layer k4, so that the peeling strength of the intermediate layer k4 can be improved, and the laminated body (7) can be prevented from being removed. The intermediate layer k4 is peeled off from the reflective film k1 when the die mouth is detached.

2088-9610-PF 20 200944356 Next, in the step (f), a semi-reflective film k5 composed of a metal thin film thinner than the reflective film k1 is formed by sputtering using a metal such as aluminum. At this time, since the chamfer 邛q5 is formed on the surface of the outer peripheral edge portion of the intermediate layer k4, a certain chamfered portion q6 is formed in the corresponding portion of the semi-reflective film k5. Then, in the step (g), a resin such as an ultraviolet curing layer m is applied by a spin coating method, and is hardened by irradiation with ultraviolet rays to form a coating layer having a thickness of about 0.1 [mm]. K6. Thereby, a Blu-ray disc can be formed. In this case, since the chamfered portion q6 is formed on the front side portion of the outer ring edge portion of the semi-reflective film k5, even the resin of the ultraviolet curable layer coated by the spin coating method is in the semi-reflective film k5. The edge portion of the bead is piled up, and a portion of the portion corresponding to the cladding layer is formed, and a slight chamfered portion q7 is formed. Therefore, since the Blu-ray disc does not form a ridge. In the present embodiment, the stamper 61 is disposed on the side of the mold assembly 12, but the stamper 61 may be disposed on the side of the mold assembly 32. In this case, the inner die holder, the protruding contact ring, the spacer, the spacer restraint ring, and the like are disposed on the side of the mold assembly, and the cavity ring is disposed on the side of the mold assembly 12. The present invention is not limited to the above-described embodiments, and various changes may be made without departing from the spirit and scope of the invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art to which the present invention pertains may be made a little more than the spirit and scope of the present invention. ^

2088-9610-PF 21 200944356 ❹ and retouching, and therefore the definition of the invention is subject to change. [Simple description of the diagram] Figure 1 is a conceptual diagram, necessary parts. Scope of protection Depending on the scope of application for patents, the smear of the stencils of the 07-chip forming mold is shown in Fig. 2 as a part of the cross-sectional view. The mold for actual molding of the present invention is shown in Fig. 3 as an enlarged view showing the necessary portions of the mold. The disc of the embodiment 碟 The disc forming of the embodiment of the present invention Fig. 4 is a conceptual view, which is a forming state of the male y gan & Disc substrate Fig. 5 is an exploded view of an embodiment of the present invention. . Fig. 6 (a) to (c) show the manufacture of a Blu-ray disc according to an embodiment of the present invention. Fig. 7 (a) to (c) show the manufacturing method of the present invention. . Fig. 8 (a) to (d) of the Blu-ray disc of the embodiment show the first diagram of the other manufacturing method of the Blu-ray disc of the embodiment of the present invention. Fig. 9 (e) to (g) are second diagrams showing other manufacturing methods of the Blu-ray disc of the embodiment of the present invention. [Description of main component symbols] 12~Mold assembly 14~Inner die holder 15~Bottom plate 16~Disc plate

2088-9610-PF 22 200944356

18~ protruding contact ring 19~ first guide ring 21~ mold spacer 22~ spacer constraint ring 23~ notch 24~ washway bushing 26~ main washway 28~ bottom mold 32~ mold assembly 36~ disc Plate 37~ cavity ring 38~ second guide ring 39~ notch 40~ intermediate plate 48~ cut punch 61~ stamper 70~ laminate 71~ stamper 8 positioning ring 82~ bottom plate 83~ Cylinder block 8 4 to flange 85 to cut punching-returning spring 86 to spring 87 to cavity ring restraint 88~ first temperature control flow path 89 to second temperature control flow path B1-disc substrate Bb bolt b2~ bolt b3~ bolt b bll ~ bolt bl2 ~ bolt bl3 ~ bolt bl4 : ~ bolt C ~ cavity space dl ~ thickness d2 ~ protrusion height d3 ~ _ front end height d4 ~ corner height eO ~ prominent Length e 1 ~ Information surface radius e2 ~ Outer ring width e 3 ~ Detached part length f protrusion part kl~ Reflective film k2~ • Cladding layer k3~ • Cladding layer 2088-9610-PF 23 200944356 k4~ Intermediate layer k5~semi-reflective film k 6 ~ cladding layer m bulge ρ 1 to point ρ 2 to point p 3 to point ρ 4 to point ρ 11 to point ρ 1 2 to point ρ 1 3 to point q 1 to dehorn portion q2 to chamfer portion q3 to chamfer portion q5 to chamfer portion Q6 to chamfered portion q7 to chamfered portion S1 to front surface S2 to back surface S3 to front end surface S4 to front surface S5 to back surface S6 to end surface S7 to end surface 5 to thickness ❿ 2088-9610-PF 24

Claims (1)

200944356 X. Patent application scope: 1. A mold for forming a disc, comprising: (a) a first mirror plate; (b) a second mirror plate, the configuration being free relative to the first mirror plate (c) a stamper mounted on one of the first and second mirror discs; (d) - inner stamper h〇lder, in the inner ring © The edge constrains the stamper and is mounted to one of the mirror discs; (e) the mold spacer is formed by a flat plate-like body, the stamper is restrained at the outer ring edge thereof, and the inner ring edge is The end surface constitutes a portion of the outer ring edge of a cavity space and is mounted to one of the mirror disks; ^ (f) a cavity ring opposite the mold spacer, wherein The end face of the ring edge constitutes a portion of the outer ring edge of the cavity space and is mounted to the other mirror disk; and © ((g) - the protrusion is formed on the die side of the inner ring side of the mold spacer The part 'and points to the cavity space. 2. If you apply for The die for forming a disk according to the item i, wherein U) the protrusion height of the protrusion is greater than or equal to 3 m] and less than or equal to 12 〇 Um]; and (b) the protruding portion of the protrusion The degree is greater than, λ* is less than 30[#m] and less than or equal to l〇〇[/zm]. The mold for forming a disk according to the first aspect of the invention, wherein the height of the front end of the 玄 metaprojection portion is greater than or equal to, and less than 戍 is equal to 20 [μm]. 4. A mold spacer for a disc forming mold, the disc forming mold having: a first mirror plate; a second mirror plate configured to advance and retreat relative to the first mirror plate a stamper, which is mounted on one of the first and second mirror discs, a mirror plate, and an inner stamper h〇lder, which restrains the stamp at the inner ring edge thereof. And mounted on one of the mirror plates; and a cavity ring, the end face of the inner ring edge forming a part of the outer ring edge of a cavity space, and being mounted on another _ = clock face plate The mold spacer is characterized in that: (4) the mold spacer is formed by a flat plate-like body at the edge of the outer ring to restrain the mold, and an end surface of the inner ring edge constitutes the cavity space. Part of 'opposite to the cavity ring and mounted on the mirror plate; and six τ die side 1: protruding and 1::=: in the inner ring side with the spacer (4) facing the cavity Space. 5. As claimed in the patent scope (4), the protrusion of the protrusion is two: mold Using _ pieces, where less than or equal to 12 〇 Ura]; and at 3 〇 Um], and (b) the protrusion of the protrusion, ^ ^ ^ dog length is greater than or equal to qn " 小于 less than or equal to l 〇〇 [ Em; J. inch in 3〇[#m], and 2088-9610-PF 26 200944356 spacer, and less than or equal to 6_ as described in the fourth aspect of the patent application, the front end height of the protrusion is A disc substrate formed by a mold larger than or equal to 口[口], 20[/m], is formed by a mold for forming a disc having a first mirror plate; a first plate 'The configuration is free to advance and retreat relative to the first mirror disk; j module I - mounted on the first mirror surface of the first and second mirror disks, the inner stamper holder, at the inner ring edge The stamper is constrained and mounted on one of the mirror discs; a mold spacer is formed by a flat plate-like body, the stamper is constrained at the outer ring edge thereof, and the end faces of the inner ring edge form a mold A portion of the outer ring edge of the cavity space and mounted to one of the mirrors a cavity ring opposite the spacer for the mold, the end surface of the inner ring edge forming a part of the outer ring edge of the cavity space, and being mounted on the other mirror plate 'and a protrusion a portion of the die side formed in the inner ring side of the mold spacer, and directed to the cavity space; the disk substrate is characterized in that a chamfering part is formed on the disc substrate The portion on the information side of the outer ring edge portion corresponds to the protruding portion. 8. A method of forming a disc substrate by forming a mold for forming a disc, the mold for forming a disc having: a first mirror plate; and a second mirror plate having a configuration relative to the first a mirror plate freely advances and retreats; a stamper 2088-9610-PF 27 200944356 (stamper) 'one of the mirror plates mounted on the first and second mirror plates, an inner stamper holder, in which The inner ring edge constrains the stamper and is mounted on one of the mirror discs; a mold spacer ''formed by a flat plate-like body' constrains the stamper at the outer ring edge and the end face of the inner ring edge thereof Forming a portion of the outer ring edge of a cavity space and mounting on one of the mirror disks; a cavity ring opposite the spacer for the die, the end face of the inner edge of the die a portion of the outer ring edge of the cavity space and mounted to the other mirror plate; and a protrusion formed on a portion of the inner side of the inner ring side of the mold spacer and directed to the cavity Space; the disc base The sheet forming method is characterized in that a portion "chamfering part" on the information surface side of the outer ring edge portion of the disc substrate is formed to correspond to the protruding portion. 2088-9610-PF 28