JPH0973672A - Spacer layer forming device and method for disk having two-layered structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to improve the accuracy of a spacer layer by supplying a UV curing resin between a rotary stamper and a first reflection layer and rotating a substrate and the rotary stamper at the time of crushing this resin between the substrate and the rotary stamper. SOLUTION: The UV curing resin 103a is successively diffused from the central side toward the outer periphery side by a centrifugal force and the prescribed size is eventually obtd. gradually from the central side when the substrate and the rotary stamper are rotated while the UV curing resin 103a is held therebetween. The UV curing resin may, thereupon, be cured successively by gradually irradiating the resin with the UV rays from the part where the size accuracy on the central side is obtd. by moving a UV nozzle 24 from the central side toward the outer periphery side. Namely, the immediate curing of the part where the accuracy is obtd. is possible in the state that this accuracy is obtd. and, therefore, the deviation in the accuracy is eventually obviated.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to high density multimedia CDs for digital video discs (DVDs).
The present invention relates to a spacer layer forming apparatus and method for a two-layer structure disk suitable for manufacturing (compact disk) and the like.

[0002]

2. Description of the Related Art Today, a technique using a high-density multimedia CD has been proposed as a next-generation high-definition video recording system, which can be applied to a digital video disc (DVD). The high-density multimedia CD can record about 3.7 gigabytes of digital data, which is more than 5 times the current CD (650 megabytes), on one side of a read-only disc with a diameter of 12 cm. By simply changing the disc of this structure to a “double-layer disc”, the storage capacity is doubled, that is, about 7.4 gigabytes.

FIG. 10 is a schematic sectional view showing an example of the two-layer structure disk. In FIG. 10, the two-layer structure disc 100 has a polycarbonate substrate 101,
Semi-transparent film (first-layer low-reflection film) 102, spacer layer (transparent film) 103, metal film (second-layer high-reflection film) 104 made of aluminum (Al) or the like, protective film (transparent film) 105
And a pit (roughness) is formed between the polycarbonate substrate 101 and the first low-reflection film 102, and between the spacer layer 103 and the second high-reflection layer 104. ) Is provided. Here, the thickness of the polycarbonate substrate 101 is about 1.2 mm, the thickness of the first low-reflection film 102 is 0.05 μm, and the spacer layer 103 is
Is about 40 μm, and the thickness of the second high-reflection film 104 is about
The thickness of the protective film 105 is 0.05 μm, and the thickness of the protective film 105 is about 10 μm.

When the two-layer disc 100 having the above-mentioned structure is used, the optical pickup 11
At 0, first, the lens is focused on the first layer and the pits of the low-reflection film 102 on the first layer are read, and the disc is intermittently moved from the center of the disc toward the outer peripheral edge direction or the opposite direction. Then, the pit of the first layer can be read (see the optical pickup 110 shown by the solid line in FIG. 10), 2
In order to read the pits of the high-reflection film 104 of the layer, the lens is focused on the second layer and intermittently moved from the outer peripheral edge side of the disc toward the center of the disc or in the opposite direction. Then, the pit of the second layer can be read (see the optical pickup 110 shown by the dotted line in FIG. 10). Therefore, by switching this, the pits of the first and second layers can be continuously read.

FIG. 11 is a diagram schematically showing a molding process of the two-layer structure disc 100. Therefore, using FIG.
The molding method of the layered structure disc 100 includes steps (1) to (6).
Will be described in this order. In step (1), stamper (master)
Using 106, a substrate having pits (polycarbonate substrate 101) is molded. In step (2), a semi-transparent film (first low-reflection film) 102 is attached onto a polycarbonate substrate 101 by sputtering. In the step (3), a transparent liquid resin (UV curable resin) 103a which is cured when irradiated with ultraviolet rays is poured onto the semitransparent film 102. In the step (4), the UV cast in the step (3)
The second layer stamper from the cured resin 103a (master)
107 is pressed and ultraviolet rays are irradiated from below the polycarbonate substrate 101. Then, the UV curable resin 103a is molded according to the mold of the stamper 107, and the spacer layer 103 is formed on the first low-reflection film 102. In step (5), an aluminum metal film (second-layer high reflection film) 104 is formed on the spacer layer 103 by sputtering. In the step (6), the UV curable resin 103a is cast on the aluminum metal film (second high-reflection film) 104, and the protective layer 105 is formed by irradiating the UV curable resin 103a to cure the UV curable resin 103a. 100 is completed.

[0006]

As described above, in the two-layer structure disc 100, when the pits in the reflection film 102 of the first layer are read, the focal point of the lens of the optical pickup 110 is set to the reflection film 102 of the first layer. When the pits on the second-layer reflective film 104 are read, the lens of the optical pickup 110 is focused on the second-layer reflective film 104.
I am trying to match. Therefore, the spacer layer 1
03 thickness control is very strictly required. Further, when the spacer layer 103 is molded, conventionally, the UV curable resin 103a is poured onto the polycarbonate substrate 101 having the semitransparent film 102 provided on the upper surface thereof, and the stamper 106 is simply pressure-bonded thereon, and at the same time, the polycarbonate substrate 101 Ultraviolet rays are radiated from below to cure, and then the stamper 106 is formed separately. That is, the structure in which the spacer layer 103 is formed by applying pressure between the polycarbonate substrate 101 and the stamper 106 to uniformly spread the UV curable resin 103a,
Due to the influence of the polycarbonate substrate 101 and the like, the distribution accuracy in the spacer layer 103 tends to deteriorate. Further, there is a problem that it takes about 2 to 3 minutes to mold and the productivity is poor. Furthermore, the polycarbonate substrate 1 after molding
However, it took a lot of time to process the extra material (burrs) protruding from No. 01, and the workability was poor.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a spacer layer forming apparatus and method for a two-layer structure disk having excellent productivity.
Further, other objects will be clarified sequentially in the contents described below.

[0008]

To achieve the above object, in a spacer layer forming apparatus for a two-layer structure disk according to the present invention, a first reflective layer, a spacer layer and a second reflective layer are formed on a substrate. And a rotary stamper disposed to face the first reflective layer on the substrate, and a liquid stamper between the first reflective layer and the rotary stamper. The UV curable resin supplying means for supplying the UV curable resin and the substrate and the rotary stamper are brought into pressure contact with each other to rotate the substrate and the rotary stamper while crushing the UV curable resin. Spacer layer forming means for forming the spacer layer between the substrate and the rotary stamper by means of the spacer layer forming means, and moving from the rotation center side to the outer peripheral side in conjunction with the spacer layer forming operation by the spacer layer forming means. Is obtained by a structure in which a UV supply means for curing by irradiation with ultraviolet (UV) spot light on the spacer layer while moving Te.

In order to achieve the above object, in the method for forming a spacer layer of a two-layer structure disc of the present invention, a first reflective layer, a spacer layer and a second reflective layer are sequentially arranged on a substrate. In the method for forming a spacer layer in a two-layer structure disk, the liquid UV is interposed between a rotary stamper and a first reflective layer which are arranged to face the first reflective layer on the substrate. The curing resin is supplied, and the crushing operation of the UV curing resin supplied between the substrate and the rotating stamper and the integral rotation operation of the substrate and the rotating stamper are performed, and the UV curing resin is used. The spacer layer is formed between the substrate and the rotary stamper, and the spacer layer is irradiated with ultraviolet rays as spot light to be cured while moving from the rotation center side to the outer peripheral side. Those were.

According to the above invention, a liquid UV curable resin is supplied between the rotary stamper and the first reflective layer, which are arranged so as to face the first reflective layer on the substrate, and the liquid UV curable resin is supplied to the substrate. Since the substrate and the rotary stamper are rotated when they are crushed between the rotary stamper and the rotary stamper, the centrifugal force generated by this rotation causes U
V-cured resin is conveniently stretched between the substrate and the rotary stamper. At the same time, while moving from the rotation center side toward the outer circumference side, ultraviolet rays are applied to the spacer layer as spot light to cure the spacer layer, so that a predetermined film thickness is achieved while controlling the film thickness. Since it can be gradually solidified from the part, the distribution accuracy is good, and the uniformized spacer layer as a whole can be formed easily and quickly.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 2 show a spacer layer forming apparatus shown as an embodiment of the present invention. FIG. 1 is a schematic vertical sectional side view taken along the line AA of FIG.
FIG. 3 is a top view of the same device. In addition, in FIG. 1 and FIG. 2, the same reference numerals as those in FIG. 10 and FIG.
11 shows the same as FIG.

In FIGS. 1 and 2, reference numeral 1 is the main body of the apparatus. A guide frame 2 is attached to the lower side of the device body 1. The guide frame 2 has a guide rod 3 whose one end is fixed to the lower surface side of the apparatus body 1 at four corners.
And a plate 4 is fixedly attached to the other end extending downward. In addition, a motor 5 is disposed substantially at the center of the plate 4 with its rotation shaft 5a facing upward. A guide rod 6 is attached to the plate 4 downward, a plate 7 is fixedly attached to the lower end of the guide rod 6, and a cylinder 8 is arranged on the plate 7. There is.

The cylinder 8 has an advancing / retreating rod 8a, and an underframe 9 is attached to the tip of the advancing / retreating rod 8a.
Are mounted so as to be movable together. The under frame 9 is arranged outside the guide rods 3 and 6, and the plate 4, the motor 5 and the like are arranged inside. The underframe 9 is guided by the guide rod 3 and the guide rod 6 by the drive of the cylinder 8 and can reciprocate vertically. Further, a through hole 10 is provided substantially in the center of the upper surface of the underframe 9, and a coupling unit 12 is provided in the through hole 10 via a bearing 11.
Is rotatably attached.

The coupling unit 12 integrally connects the motor 5 arranged in the underframe 9 and the center shaft unit 13, and the motor 5 and the coupling unit 12 are connected to each other. A sub-coupling member 14 is interposed between the sub-coupling members 14, and the drive of the motor 5 is transmitted to the coupling unit 12 via the sub-coupling member 14 so that the rotary shaft 5a, the sub-coupling member 14, and the coupling unit 12 are connected. And can rotate together.

On the other hand, the center shaft unit 13 penetrates the apparatus main body 1 and projects to the upper side of the apparatus main body 1, and by a holder unit 15 fixedly attached to the upper surface side of the apparatus main body 1. An outer cylinder shaft 13A that is rotatably held, and a center pin that can move vertically within the outer cylinder shaft 13A independently of the outer cylinder shaft 13A and that can rotate integrally with the outer cylinder shaft 13A. And 13B. Then, in the portion projecting above the holder unit 15, the stamper 107 is integrally rotatably attached to the upper end of the outer cylindrical shaft 13A, and the substrate positioning member 16 is integrally rotatably attached to the upper end of the center pin 13B. Has been. Here, the outer diameter of the stamper 107 is the polycarbonate substrate 1
The UV curable resin 1 is formed to have an outer diameter substantially equal to 01.
When making the spacer layer 103 with 03a, the stamper 1
07, the extra UV curable resin 103a protruding from between the polycarbonate substrate 101 and the polycarbonate substrate 101 does not easily generate burrs, which facilitates post-molding treatment.

Further, by arranging the polycarbonate substrate 101 on the substrate positioning member 16 and then fixing it by the pressing member 19, the polycarbonate substrate 101 is concentrically arranged and can rotate integrally. ing. Further, the holder unit 15 is formed with an air supply / discharge path 17 having one end opened near the rotation center of the stamper 107 and the other end opened to the outer peripheral portion of the holder unit 15. The air supply / exhaust path 17 is connected to an air controller (not shown), and the air at the center of rotation of the stamper 107 is forcibly sucked through the air supply / exhaust path 17, or conversely, air is supplied to the center of rotation. It has a structure that can be forcibly sprayed.

In addition, on the upper side of the apparatus main body 1, around the stamper 107, a waste resin receiving member 20 provided centering on the stamper 107 is attached to the apparatus main body 1 via a fixed shaft 21. ing. The waste resin receiving member 20 is used to remove the excess UV curable resin 10 that has been shaken off from the stamper 107, as will be described later.
It is for receiving 3a and further discharging it from the waste passage through the waste hole 24. In addition, on the apparatus main body 1, a UV curable resin supplier 23 having a resin supply nozzle 22 for supplying the UV curable resin 103a on the stamper 107, and a polycarbonate substrate 101 set on the center pin 13B. A UV irradiator 25 having a UV nozzle 24 for irradiating ultraviolet rays (UV) is provided. The nozzle 22 for supplying the UV curable resin can move to a position above the stamper 107 and a position deviated from this, and the UV nozzle 24 for UV irradiation gradually continues from the center of the stamper 107 toward the outer peripheral direction. Can be moved.

In the spacer layer forming apparatus having such a structure, when the cylinder 8 is driven and the rod 8a is projected, the underframe 9 is guided by the guide rods 3 and 6 and ascends, and the stamper 107 is moved. Outer cylinder shaft 13A and coupling member 1 attached
4 does not move and only the center pin 13B side rises.
Further, when the driving of the cylinder 8 is stopped and the rod 8a is retracted, the underframe 9 is guided by the guide rods 3 and 6 and descends, and the coupling member 1 is integrated with this.
4 and the center pin 13B also descend. Further, when the motor 5 is rotated, the center shaft unit 13, that is, the outer cylindrical shaft 13A and the center pin 13B are integrally rotated via the coupling member 14.

FIG. 3 is a diagram schematically showing a molding process of a two-layer structure disk using the spacer layer forming apparatus shown in FIGS. 1 and 2, and FIGS. 4 to 9 are schematic views of the spacer layer forming apparatus. It is a part operation explanatory drawing. Therefore, the molding step shown in FIG. 3 will be described in order of steps (1) to (6) with reference to FIGS. 1 and 2 and FIGS. 3 to 9. 3 to 9, the same reference numerals as those in FIGS. 1 and 2, 10 and 11 respectively denote the same as those in FIGS. 1 and 2, 10 and 11.

First, steps (1) and (2) are the same as steps (1) and (2) in the conventional method shown in FIG. 11, and in step (1), a stamper (master) 106 is used. Substrate with pits (polycarbonate substrate 101)
Is molded. In the step (2), the polycarbonate substrate 1
A semi-transparent film (first low-reflection film) 102 is attached onto 01 by sputtering.

Steps (3) to (4-5) use the spacer layer forming apparatus shown in FIGS. 1 and 2. In step (3), the polycarbonate substrate 101 is the substrate positioning member 16 of the center pin 13B. Before being set to
The motor 5 is rotated at a low speed, and the upper surface of the stamper (master) 107 on the center shaft unit 13 which is rotated by the driving force of the motor 5 is a transparent liquid resin (UV curable resin) that is cured when irradiated with ultraviolet rays. ) 103a is dropped from the resin supply nozzle 22 and poured in a ring shape (see FIG. 4). Then, the rotation of the motor 5 is stopped.

In step (4-1), the cylinder 8 is driven to protrude the rod 8a and raise the underframe 9. Then, along with this, the center pin 13B also integrally rises (see FIG. 5). Then, the polycarbonate substrate 101 having the low reflection film 102 formed in the step (2) on the substrate positioning member 16 of the center pin 13B.
Is set so that the low reflection film 102 is on the lower side (the side facing the stamper 107), and the center pin 13B
Then, the polycarbonate substrate 101 and the polycarbonate substrate 101 can be rotated together (see the two-dot chain line in FIG. 5). Subsequently, the cylinder 8 is driven to pull back the rod 8a, and the center pin 13B together with the underframe 9 are attached to the stamper 1
07 is gradually lowered so that air does not enter between the polycarbonate substrate 101 and the polycarbonate substrate 101, and the stamper 1
The polycarbonate substrate 101 is grounded on 07 via the UV curable resin 103a. At the same time, air is forcedly evacuated from the lower side of the rotation center through the air supply / exhaust path 17 to diffuse a part of the UV curable resin 103a inward (see FIG. 6). The arrow indicated by reference numeral 27 in FIG. 6 indicates the extracted air.

In the step (4-2), the center pin 13B is used.
The motor 5 is rotated at a high speed during or after the lowering of the air-conditioner so that the outer cylindrical shaft 13A of the center shaft unit 13 and the center pin 13B are integrally formed, and the air supply / exhaust passage 1
Rotate while removing air from 7. Then, the UV curable resin 103a is diffused to the outside by the centrifugal force due to this rotation, and the excess UV curable resin 103a is discharged from the outer periphery (see FIG. 7). The discharged excess UV curable resin 103a is received by the waste resin receiving member 20 provided around the stamper 107, and further discharged from the waste passage through the waste hole 24. Although not shown here, the stamper 107 and the polycarbonate substrate 101
The thickness of the UV curable resin 103a between and is monitored by a sensor, and the polycarbonate substrate 1 is adjusted to a predetermined thickness.
01 (center pin 13B) is lowered and rotated, and the air is removed. The rotation by the motor 5 and the air bleeding are determined in consideration of the viscosity of the UV curable resin 103a and the like.

In step (4-3), U is added in step (4-2).
The UV nozzle 24 is moved from the center toward the outer circumference on the upper side of the polycarbonate substrate 101 in which the V-curing resin 103a is diffused to a predetermined thickness, and ultraviolet rays (UV) are spotted on the polycarbonate substrate 102 in conjunction with this movement. Irradiate (see FIG. 8). Then, this ultraviolet ray is irradiated onto the UV curable resin 103a through the polycarbonate substrate 101, and the UV curable resin 103a is cured by this irradiation, and this is fixed to the polycarbonate substrate 101 side. That is, the spacer layer 103 is formed on the low reflection film 102 of the polycarbonate substrate 101. In addition, here, in the case where burrs due to the UV curable resin 103a appear on the outer peripheral portion of the polycarbonate substrate 101, a cutter blade or the like is projected and scraped off on the outer peripheral portion of the polycarbonate substrate 101, although not shown.

When irradiating with ultraviolet rays, the structure may be such that the entire room in which the spacer layer forming device is placed can also be irradiated with ultraviolet rays. That is, it may be used in combination with a UV nozzle, and in the case of this combined use, ultraviolet light is supplementarily irradiated from the entire room at the same time as irradiation of ultraviolet light by the UV nozzle 24 is started (line indicated by reference numeral 26 in FIG. 8). Indicates the ultraviolet rays emitted from the entire room). Furthermore, in the present embodiment example, the UV nozzle 2
The movement of 4 is not the same speed from the center to the outer circumference, but the moving speed becomes slower as the distance from the center to the outer circumference side increases. This is because the peripheral area increases as the distance from the center to the outer peripheral side increases, and the irradiation amount of the ultraviolet rays in each portion is made substantially constant by changing the moving speed of the UV nozzle 24. Further, the irradiation amount of the UV nozzle 24 may be changed without changing the moving speed of the UV nozzle 24, or the rotation speed of the center shaft unit 13 may be changed to make the irradiation amount constant. .

The reason why the UV nozzle 24 is moved from the center toward the outer periphery in this way to cure the UV curable resin 103a is as follows. UV curable resin 1
When 03a is sandwiched and rotated, UV curing resin 10
3a is diffused from the center side to the outer peripheral side by centrifugal force, and a predetermined size is gradually obtained from the center side. Therefore, by moving the UV nozzle 24 from the center side toward the outer circumference side, it is possible to gradually irradiate the ultraviolet rays from the portion where the dimensional accuracy on the center side is obtained and to cure the UV nozzle. That is, since the portion where the accuracy is obtained can be immediately cured in the state where the accuracy is obtained, the accuracy is not lost. Further, since the work of hardening can be performed in order from the part where the accuracy is obtained without waiting for the accuracy of the whole to be obtained, the work speed is improved.

In step (4-4), when the spacer layer 103 is thus formed on the polycarbonate substrate 101, the motor 5 is stopped and the rotation of the center shaft unit 13 is stopped.

In step (4-5), the cylinder 8 is driven to protrude the rod 8a and raise the underframe 9. Then, along with this, the center pin 13B also integrally rises. At this time, air is strongly blown from the lower side of the rotation center toward the center of the polycarbonate substrate 101 through the air supply / discharge path 17. As a result, air is forced to enter between the spacer layer 103 and the stamper 107, and the spacer layer 103 and the stamper 107 are easily separated from each other. The space between the stampers 107 is quickly peeled off and removed by the spacer layer forming device (see FIG. 9). In addition, the arrow shown with the code | symbol 28 in FIG. 9 has shown the air blown. Then, the one thus produced becomes the polycarbonate substrate 101 having the low reflection film 102 and the spacer layer 103, and this is sent to the next step (5). When the polycarbonate substrate 101 is removed from the center pin 13B, the cylinder 8 is driven to pull back the rod 8a, the spacer layer forming apparatus returns to the initial state, waits for the next polycarbonate substrate 101 to be set, and The operation will be repeated.

Next, steps (5) and (6) are the same as the conventional method, and in step (5), the polycarbonate substrate 101 provided with the low reflection film 102 and the spacer layer 103.
Then, an aluminum metal film (second highly reflective film) 104 is attached on the spacer layer 103 by sputtering. In the step (6), the UV curable resin 103a is cast on the aluminum metal film (second high-reflection film) 104, and is irradiated with ultraviolet rays to be cured to form the protective layer 105. Thus, steps (1), (2), (3), (4-
1), (4-2), (4-3), (4-4), (4-
By going through 5), (5), and (6), the same dual-layer structure disc 100 as the conventional one can be quickly manufactured.

Therefore, according to this embodiment,
The following effects (a) to (d) can be expected. (A) Low-reflection film on the polycarbonate substrate 101 (first
Of the stamper 1 arranged to face the reflective layer 102 of
The liquid UV curable resin 103a is dripped onto 07 and supplied in an annular shape, which is crushed between the polycarbonate substrate 101 and the stamper 107. At this time, the polycarbonate substrate 101 and the stamper 107 are rotated at high speed. The centrifugal force generated by this rotation causes the UV curable resin 103a.
Is stretched between the polycarbonate substrate 101 and the stamper 107.
The deviation of 3a can be prevented. At the same time, since the air between the polycarbonate substrate 101 and the stamper 107 is forcibly released from the center of rotation and is squeezed slowly,
Air (air bubbles) is prevented from being mixed into the V-curable resin 103a, and the UV-curable resin 103a is also pulled inside, so that the UV-curable resin 103a pulled inside and the UV-curable resin 103a pulled outside. Spacer layer 103 that is substantially uniform, has improved distribution accuracy, and is uniform as a whole
Will be formed easily and quickly.

(B) A stamper 107 which is arranged so as to face the low reflection film 102 on the polycarbonate substrate 101.
When the stamper 107 is rotated at a low speed, a liquid UV curable resin 103a is supplied to the top of the polycarbonate substrate 101 and the stamper 107, and when the polycarbonate substrate 102 and the stamper 107 are crushed. Since it is rotated at a high speed, the UV curing resin 103a is transferred to the polycarbonate substrate 10 by the centrifugal force generated by this rotation.
Conveniently stretched between the 2 and stamper 107. Further, at the same time, ultraviolet rays are applied to the spacer layer 103 as spot light to cure the spacer layer 103 while moving from the rotation center side toward the outer peripheral side, so that a predetermined film thickness is achieved while controlling the film thickness. Since it can be gradually solidified from the portion, a spacer layer having good distribution accuracy and uniformed as a whole can be formed easily and quickly.

(C) A stamper 107 disposed so as to face the low reflection layer 102 on the polycarbonate substrate 101.
When the UV curable resin 103a is supplied onto the above and crushed between the polycarbonate substrate 101 and the stamper 107, the polycarbonate substrate 101 and the stamper 1 are
Because 07 and 07 are rotated, the centrifugal force generated by this rotation causes UV
The cured resin 103a is conveniently stretched between the polycarbonate substrate 101 and the stamper 107. Also,
At the same time, ultraviolet rays are applied as spot light to the spacer layer 103 so as to cure it while moving from the rotation center side toward the outer peripheral side. Therefore, while controlling the film thickness, from the portion where the predetermined film thickness is completed. Can be gradually hardened. Moreover, although the area that requires irradiation increases as the spacer layer 103 moves from the center of rotation toward the outer peripheral side, the UV irradiation amount is changed by slowing the moving speed of the UV spot light toward the outer peripheral side. Since the UV curable resin 103a can be similarly cured at any position, the uniform spacer layer can be formed easily and quickly as a whole.

(D) Since the outer diameter of the polycarbonate substrate 101 and the outer diameter of the stamper 103 are formed substantially equal to each other, the outer periphery of the polycarbonate substrate 101 and the stamper 1 are formed.
When the UV curable resin (burrs) protruding from the outer periphery of 07 is generated, the shake-off process is performed by the rotation of the polycarbonate substrate 101 and the stamper 107, so that the adhesion of burrs is reduced. Further, even if they are attached, if the cutter blade or the like can be easily applied to the outer peripheral surface, the stripping process becomes easy. This improves workability and improves productivity.

In the above embodiment, the case where the polycarbonate substrate 101 is used as the substrate has been described, but it goes without saying that any other substrate may be used. Further, the UV curable resin 103a is attached to the stamper 107.
Although the structure which is designed to be dropped on is disclosed, conversely, the UV curing resin 103 is formed on the polycarbonate substrate 101.
The UV curing resin 103a may be pressed and crushed by dropping the a and dropping the stamper 103.

[0035]

As described above, according to the present invention,
A UV curable resin is supplied between the first reflective layer and the rotary stamper that is arranged to face the first reflective layer on the substrate,
When crushing this between the substrate and the rotary stamper,
Since the substrate and the rotary stamper are rotated, the UV curable resin is conveniently stretched between the substrate and the rotary stamper by the centrifugal force generated by this rotation. At the same time, while moving from the rotation center side to the outer circumference side, ultraviolet rays are applied to the spacer layer as spot light to cure the spacer layer, so that a predetermined film thickness is achieved while controlling the film thickness. Since it can be gradually solidified from the part, the distribution accuracy is good, and the uniformized spacer layer as a whole can be formed easily and quickly, and the productivity is improved.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional side view taken along the line AA of FIG.

FIG. 2 is a top view showing a spacer layer forming apparatus shown as an embodiment of the present invention.

FIG. 3 is a process drawing of a two-layer structure disc shown as an embodiment of the present invention.

FIG. 4 is a top view showing a spacer layer forming apparatus shown as an embodiment of the present invention.

FIG. 5 is an operation explanatory diagram of the apparatus according to the present embodiment.

FIG. 6 is an operation explanatory diagram of the apparatus according to the present embodiment.

FIG. 7 is an explanatory diagram of the operation of the apparatus of this embodiment.

FIG. 8 is an operation explanatory diagram of the apparatus according to the present embodiment.

FIG. 9 is an operation explanatory diagram of the apparatus according to the present embodiment.

FIG. 10 is a schematic structural diagram showing an example of a conventionally known two-layer structure disc.

FIG. 11 is a molding process diagram of a conventional two-layer structure disc.

[Explanation of symbols]

 1 Device Main Body 13 Center Axis Unit 13A Outer Cylindrical Axis 13B Center Pin 17 Air Supply / Exhaust Path 22 Resin Supply Nozzle 23 UV Curing Resin Supply Machine 24 UV Nozzle 25 UV Irradiator 100 Two Layer Structure Disk 101 Polycarbonate Substrate 102 Low Reflection Layer ( Low-reflection film of the first layer 103 Spacer layer 103a UV curable resin 104 High-reflection layer (high-reflection film of the second layer) 107 Stamper

Claims (4)

[Claims] 1. An apparatus for forming a spacer layer in a two-layer structure disc comprising a first reflective layer, a spacer layer and a second reflective layer sequentially arranged on a substrate, wherein the first reflective layer on the substrate is provided. A rotary stamper arranged to face the layer; a UV curable resin supply means for supplying a liquid UV curable resin between the first reflective layer and the rotary stamper; the substrate and the rotary stamper. To form a spacer layer between the substrate and the rotary stamper by rotating the substrate and the rotary stamper together with the substrate and the rotary stamper while crushing the UV-curable resin by crushing the UV curable resin. Means, and an ultraviolet (UV) spot on the spacer layer while moving from the rotation center side to the outer peripheral side in conjunction with the spacer layer forming operation by the spacer layer forming means. UV supply means, the spacer layer forming device having a two-layer structure disc which comprising the city for curing by irradiation with bets light. 2. The device according to claim 1, further comprising a unit for forcibly bleeding air between the substrate and the rotary stamper from a rotation center side in association with a spacer layer forming operation by the spacer layer forming unit. A device for forming a spacer layer of a two-layer disc. 3. A method for forming a spacer layer in a two-layer structure disc comprising a first reflective layer, a spacer layer and a second reflective layer sequentially arranged on a substrate, wherein the first reflective layer on the substrate is formed. Liquid UV between the rotary stamper arranged to face the layer and the first reflective layer
By supplying a curing resin, the crushing operation of the UV curing resin supplied between the substrate and the rotating stamper and the integral rotation operation of the substrate and the rotating stamper are performed, and The spacer layer is formed between the substrate and the rotary stamper, and the spacer layer is irradiated with ultraviolet rays as spot light and cured while moving from the rotation center side toward the outer peripheral side. A method for forming a spacer layer of a two-layer structure disc. 4. The two-layer structure according to claim 1, wherein the air between the substrate and the rotary stamper is forcibly removed from the rotation center side in conjunction with the spacer layer forming operation by the spacer layer forming means. Method for forming spacer layer of structural disc.