JPH04259929A - Optical information recording medium and production thereof and apparatus for producing this medium - Google Patents

Abstract

PURPOSE:To obtain the optical information recording medium which does not affect the UV curing type resin on a substrate surface and obviates the bleeding out of the UV curing type. resin to the substrate end faces. CONSTITUTION:The UV curing type resin bleeding out to the end faces of the substrate 2 is removed while the UV curing type resin bleeding out to the end faces of the substrate 2 is in an uncured state and when the resin near at least the surface of an optical information recording medium constituting layer 3 attains or is going to attain a cured state in the process of curing the UV curing type resin constituting layer by irradiation with UV rays, by which the UV curing type resin 1 is obtd.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium, a method for manufacturing the same, and an apparatus for manufacturing the same.

0002

[Prior Art] An optical information recording medium uses PMM as its substrate.
A (polymethyl methacrylate) and PC (polycarbonate) are used, but these substrates have low surface hardness and are easily damaged. Furthermore, since these substrate materials are easily charged, a large amount of dust adheres thereto, which may cause problems in use. To solve these problems, a hard coat layer made of an ultraviolet curable resin is usually provided on the opposite side of the substrate from the recording surface.

[0003] Furthermore, optical information recording media are required to improve adhesion, provide a barrier against water or gas, improve storage stability of the recording layer, improve reflectance, protect the substrate from solvents, form pregrooves, etc. An undercoat layer may be provided for this purpose. In particular, ultraviolet curing resins are suitable for the purpose of protecting the substrate from solvents and forming pregrooves.

As described above, an ultraviolet curable resin is used as a constituent layer of an optical information recording medium, and this ultraviolet curable resin is coated using a spinner and a coating method, but generally, no matter what method is used, As shown in FIG. 12, the ultraviolet curing resin more or less protrudes from the end surface of the substrate. If the ultraviolet curable resin is cured using the apparatus shown in FIG. 13 while this protrusion still exists, a wave pattern will be clearly formed on the end face of the substrate, which is unsatisfactory in terms of appearance.

[0005] As a solution to the problem of poor appearance as described above, (1) improve the appearance by scraping off the ultraviolet curable resin protruding from the edge surface of the substrate or cutting off the outer peripheral edge when completing the production of the optical information recording medium; Method: (1) Immediately after applying the ultraviolet curable resin, there is a method of wiping off the ultraviolet curable resin protruding from the end surface of the substrate.

[0006] Furthermore, in organic dye-based optical information recording media, it is a well-known technique to provide a recording layer by spinner coating. Normally, the optical information recording media obtained in this way are pasted together to form an air sandwich structure.
Photocurable adhesives are used as adhesives because of their high productivity. At this time, as shown in FIG. 14, the recording film 42 wraps around the back surface of the substrate, and the unnecessary recording film 41 coated on the adhesive part of the non-recording area at the outer peripheral edge causes a decrease in adhesive strength and the adhesive As the degree of curing decreases, deterioration of recording materials during storage is accelerated due to uncured monomers.

[0007] As a method to solve these problems,
Method for improving adhesives with high dye solubility, ■ JP-A-63
A method for wiping off a recording film attached to an adhesive part described in Japanese Patent Application Laid-open No. 47194 and Japanese Patent Application Laid-open No. 63-234429;
Japanese Patent Application Laid-Open No. 63-234428 proposes a method of washing away the recording film adhering to the adhesive portion of the non-recording area at the outer peripheral end with a solvent as shown in FIG. 15.

[0008]

[Problems to be Solved by the Invention] However, in the method of preventing ultraviolet curable resin from protruding onto the end surface of a substrate, method (2) has problems in that productivity is low and there is a high risk of damaging the optical information recording medium. In addition, when manufacturing optical information recording media on a line, a place with a good environment such as a clean room is required, but if there is a process of scraping the edge of the substrate or cutting the outer edge of the substrate, the environment inside the line becomes Getting worse.

[0009] In addition, with the method (2), when wiping the ultraviolet curable resin on the end face of the substrate, there is a risk that the wiping member may generate dust or the like, or the wiping member may come into contact with the uncured ultraviolet curable resin layer on the substrate surface. There is. If such dust or contact traces of the wiping member adhere to the ultraviolet curable resin on the surface of the substrate, it may cause fatal defects to the optical information recording medium.

[0010] Furthermore, in the method for preventing adhesive strength and deterioration of the recording material during storage using a recording film applied to the adhesive part of the non-recording area at the outer circumferential edge, the method (2) achieves both adhesive strength and storage stability. In addition, the method (2) had drawbacks such as problems with the absorbency of the wiping material, problems with replacing the wiping material, and large smearing at the boundary where the recording film was removed. In addition, in method (■), since a recording film dissolving agent is used, the dissolving agent may scatter on the substrate, the dissolving agent may accumulate at the nozzle tip, the pressure may fluctuate at the start of the dissolving agent injection, and the nozzle tip may be affected when the dissolving agent ends. The dissolving agent would scatter, melting the recording film in the recording area and causing defects.

The present invention aims to solve the above problems, and its purpose is to provide optical information recording without affecting the ultraviolet curable resin on the surface of the substrate and without protrusion of the ultraviolet curable resin on the end surface of the substrate. An object of the present invention is to provide a medium, a method for manufacturing the same, and a device for manufacturing the same.

Another object of the present invention is to remove the recording film or substrate attached to the adhesive portion of the non-recording area at the outer peripheral edge of an optical information recording medium having an air sandwich structure without affecting the recording layer. The present invention relates to an optical information recording medium from which a recording film that has wrapped around the back side has been removed, and a manufacturing apparatus for manufacturing the same.

[0013]

[Means for solving the problems] The first invention of the present invention is
An optical information recording medium having an optical information recording medium constituent layer made of an ultraviolet curable resin, characterized in that there is no protrusion of the ultraviolet curable resin on the end surface of the substrate of the optical information recording medium, an ultraviolet curable type. In an optical information recording medium having an optical information recording medium constituent layer made of resin, in the process of applying the ultraviolet curable resin and curing the optical information recording medium constituent layer by UV irradiation, the ultraviolet curable resin protrudes from the end surface of the substrate. When or while the resin is in an uncured state and at least the vicinity of the surface of the layer constituting the optical information recording medium is cured, remove the ultraviolet curable resin protruding from the end surface of the substrate. A method for manufacturing an optical information recording medium and an apparatus for manufacturing an optical information recording medium, characterized in that: a mechanism for curing an optical information recording medium constituent layer made of an ultraviolet curable resin by UV irradiation; When the layer is irradiated with ultraviolet rays, the ultraviolet curable resin protruding from the edge of the substrate is in an uncured state, and at least the vicinity of the surface of the optical information recording medium constituent layer is cured, or while it is in that state. , and a mechanism for removing ultraviolet curable resin protruding from the end surface of the substrate.

[0014] The second aspect of the present invention is to ensure that, in an optical information recording medium having a recording layer containing a dye as a main component, there is no protrusion of the recording film in the non-recording area at the outer peripheral edge of the recording layer coating surface. An optical information recording medium characterized by an optical information recording medium having a recording layer containing a dye as a main component, characterized in that the recording layer does not wrap around the back surface of the substrate, and an optical information recording medium having a recording layer containing a dye as a main component. In an apparatus for manufacturing an optical information recording medium having a recording layer, there is provided a means for removing a recording film in a non-recording area at an outer peripheral edge of a recording layer coating surface, and a means for removing the recording film in a non-recording area at the outer peripheral edge in a normal manner. The present invention is characterized by comprising means for detecting whether or not the recording film has been removed, and means for correcting the removing means so that the detecting means normally removes the recording film from the non-recording area at the outer peripheral end.

Next, the present invention will be explained in detail. First, the first
This invention will be explained below. The optical information recording medium of the present invention includes:
As shown in FIG. 1, it consists of a substrate 2 and an optical information recording medium constituting layer 3, and the ultraviolet curable resin of the optical information recording medium constituting layer does not protrude from the end surface of the substrate. This optical information recording medium 1 is produced by applying ultraviolet curable resin on the substrate surface, when the ultraviolet curable resin on the surface of the substrate is cured, and when the ultraviolet curable resin protruding from the end surface of the substrate is in an uncured state. It can be manufactured by removing the curable resin.

In the method for manufacturing the optical information recording medium 1 of the present invention, in a state where the ultraviolet curable resin on the substrate surface is cured,
In order to achieve an uncured state for the UV-curable resin protruding from the edge of the substrate, the UV intensity, UV irradiation time,
Appropriately combine the N2 purge amount (inside oxygen concentration),
The above conditions may be set to such an extent that the ultraviolet curing resin on the end surface of the substrate does not harden in a short period of time. Furthermore, the state in which the ultraviolet curable resin on the substrate surface is cured means that the ultraviolet curable resin at least near the surface of the substrate is cured, and even if dust or the like adheres to the ultraviolet curable resin layer on the substrate surface, It is in a state where it is not incorporated into the layer and can be easily removed by air blowing or the like. Therefore, the inside does not necessarily have to be completely cured.

When the ultraviolet curable resin protruding from the edge of the substrate is in an uncured state and the ultraviolet curable resin layer on the substrate surface is cured at least near the surface, the ultraviolet curable resin protruding from the edge of the substrate is in an uncured state. By removing the resin, the optical information recording medium 1 of the present invention can be obtained. At this time, ultraviolet irradiation is continued continuously.

A method for removing uncured ultraviolet curable resin protruding from the end surface of the substrate according to the present invention includes wiping off the ultraviolet curable resin with a wiping member while rotating the optical information recording medium. The wiping member to be used is not particularly limited as long as it easily absorbs uncured ultraviolet curable resin, does not generate dust, has a high degree of cleanliness, and does not damage the end surface of the substrate.

Another method for removing the uncured ultraviolet curable resin protruding from the end surface of the substrate of the present invention is to remove the ultraviolet curable resin using a solvent while rotating the optical information recording medium. The solvent used may be any solvent that does not dissolve the substrate, and it does not matter whether the solvent dissolves the ultraviolet curable resin or not. This is because the solvent is discharged while the optical information recording medium is rotated, and the force of the solvent's scattering washes away the liquid, uncured ultraviolet curable resin on the end surface of the substrate.

As a method for removing the ultraviolet curable resin protruding from the end surface of the substrate according to the present invention, specifically, the following method can be considered. First, under the above-mentioned conditions where the UV-curable resin on both the substrate surface and the substrate edge is completely cured, we investigated the uncured time of the UV-curable resin on the substrate edge. When the ultraviolet curable resin is cured (at least near the surface thereof), the ultraviolet curable resin protruding onto the end surface of the substrate is wiped off with a wiping member or removed with a solvent while the optical information recording medium 1 is rotated.

Second, the ultraviolet curable resin on the substrate surface is completely cured at least in the vicinity of the surface, but the ultraviolet curable resin on the end surface of the substrate remains uncured.Then, the ultraviolet curable resin on the substrate surface is cured under the above-mentioned conditions. The ultraviolet curing resin protruding from the end surface of the substrate is removed or removed using a solvent while rotating the optical information recording medium. After removal, the inside of the ultraviolet curable resin layer may be completely cured, but there may also be cases where only the vicinity of the surface is completely cured and the inside is not cured, so please set the above conditions as necessary. Continue to irradiate ultraviolet rays by changing the temperature to completely cure the inside of the ultraviolet curable resin layer.

In the present invention, the uncured ultraviolet curable resin protruding from the end surface of the substrate can be removed during the curing process by ultraviolet irradiation. That is, since the uncured ultraviolet curable resin is removed during the curing process of the ultraviolet curable resin, the removal process time is completely included in the curing process time and does not affect the tact at all.

[0023] The substrate and the ultraviolet curable resin used in the present invention are those commonly used, and the ultraviolet ray curable resin is applied by a conventional method.

Further, the present invention is applied to the optical information recording medium constituting layer 3 using an ultraviolet curable resin, and is not limited to a hard coat layer or an undercoat layer.

Next, the optical information recording medium manufacturing apparatus of the present invention will be explained. The optical information recording medium manufacturing apparatus of the present invention is shown in FIGS. 2(a) and 2(b), and includes a mechanism for curing the ultraviolet curable resin of the optical information recording medium constituent layer 3 on the substrate surface by ultraviolet irradiation; A mechanism is provided to remove the ultraviolet curing resin 4 protruding from the end surface of the substrate.

A mechanism for curing the ultraviolet curable resin of the optical information recording medium constituting layer 3 on the substrate surface of the optical information recording medium manufacturing apparatus of the present invention by ultraviolet irradiation will be explained. First, on the turntable 5 on the disk inside the cylindrical container 9,
A disk-shaped optical information recording medium 1 coated with an ultraviolet curable resin is placed on a substrate 2, and a turntable 5 is rotated. Next, nitrogen is introduced from the nitrogen inlet 10 to replace the inside of the container 9 with nitrogen. Next, ultraviolet rays 7 are irradiated from the ultraviolet ray irradiation device 6.

This ultraviolet irradiation device 6 is located above the container 9.
Since it is located parallel to the optical information recording medium 1 and rotates the turntable 5, it is necessary to cover at least the optical information recording medium 1 from the center to the end. Figure 2(a), (
In b), it is installed so as to cover the entire semicircle of the optical information recording medium 1, but it may be installed so as to cover the entire optical information recording medium 1, and its size does not matter.

Ultraviolet light 7 irradiated from the ultraviolet irradiation device 6
The UV light passes through the ultraviolet transmitting member 8 that seals the upper part of the container 9 and advances into the container 9. Since the ultraviolet ray irradiation device 6 and the optical information recording medium 1 are parallel to each other, the ultraviolet rays 7 are irradiated perpendicularly to the substrate surface of the optical information recording medium 1 to record optical information on the surface of the substrate 2 of the optical information recording medium 1. The ultraviolet curable resin of the medium constituting layer 3 is easily cured, and the ultraviolet curable resin 4 protruding from the end surface of the substrate 2 is difficult to cure.

Further, the rotation speed of the turntable 5 varies depending on the intensity of the ultraviolet rays 7, the size of the ultraviolet irradiation device 6, and the size of the optical information recording medium 1.

By using such a mechanism for curing the ultraviolet curable resin through ultraviolet irradiation, the optical information recording medium constituting layer 3 on the substrate surface can be easily converted into an ultraviolet curable resin by appropriately changing the ultraviolet irradiation time, ultraviolet intensity, and N2 purge amount. While at least the surface of the resin is cured, the ultraviolet curable resin 4 protruding from the end surface of the substrate can be left uncured.

Next, a mechanism for removing the ultraviolet curing resin 4 protruding from the end surface of the substrate in the manufacturing apparatus of the present invention will be explained. In FIGS. 2(a) and 2(b), the wiping member support 12 penetrates the ultraviolet transmitting member 5 and is installed near the end surface of the substrate 2 of the optical information recording medium 1.
) and (b), the ultraviolet irradiation device 6 is installed on the opposite semicircular side of the optical information recording medium 1, but it may be installed on the same semicircular side of the optical information recording medium 1. The position may be anywhere near the end face of the substrate. Further, this wiping member support 12 can move laterally in parallel to the optical information recording medium 1. Wiping member 1
1 is provided at the tip of the wiping member support 12 and parallel to the end surface of the substrate 2 of the optical information recording medium 1,
The material is not particularly limited as long as it is a highly clean material that easily absorbs uncured ultraviolet curable resin, does not generate dust, and does not damage the end surface of the substrate 2 of the optical information recording medium 1.

At least the surface of the ultraviolet curable resin of the optical information recording medium constituting layer 3 on the surface of the substrate of the optical information recording medium 1 is cured, and the ultraviolet curable resin 4 protruding from the end surface of the substrate is not cured. At this time, the wiping member support 12 is moved to press the wiping member 11 onto the end surface of the substrate of the rotating optical information recording medium 1 while continuing to irradiate the ultraviolet rays. The pressure force of the wiping member 11 at this time varies depending on the material of the wiping member 11, taking into consideration the absorption rate of the uncured ultraviolet curable resin, damage to the end surface of the substrate 2, etc. Further, the rotational speed of the turntable 5 at this time also differs depending on the material of the wiping member 11.

After wiping off the uncured ultraviolet curable resin 4 protruding from the end surface of the substrate of the optical information recording medium 1, the wiping member support 12 is moved to a far side of the optical information recording medium 1, and the wiping member 11 is removed from the substrate. Separate from end face.

Thereafter, if the ultraviolet curable resin of the optical information recording medium constituting layer 3 on the surface of the substrate of the optical information recording medium 1 has not been completely cured to the inside, it is subsequently irradiated with ultraviolet rays to completely cure it.

As explained above, by using the manufacturing apparatus of the present invention, the ultraviolet curable resin 4 protrudes from the end surface of the substrate during curing of the ultraviolet curable resin of the optical information recording medium constituent layer 3 on the substrate surface of the optical information recording medium 1. can be removed, and the optical information recording medium 1 shown in FIG. 1 can be obtained.

Next, another optical information recording medium manufacturing apparatus for removing the ultraviolet curing resin from the end surface of the substrate according to the present invention will be described. The manufacturing apparatus of the optical information recording medium of the present invention is shown in FIG. 3(a).
, (b), which includes a mechanism for curing the ultraviolet curable resin of the optical information recording medium constituting layer 3 on the substrate surface by ultraviolet irradiation, similar to the optical information recording medium manufacturing apparatus of FIG.
A mechanism is provided to remove the ultraviolet curing resin 4 protruding from the end surface of the substrate.

A mechanism for curing the ultraviolet curable resin of the optical information recording medium constituting layer 3 on the substrate surface of the optical information recording medium manufacturing apparatus of the present invention by ultraviolet irradiation will be explained. This mechanism is similar to the optical information recording medium manufacturing apparatus described above. First, the turntable 5 on a disk inside the cylindrical container 9
A disk-shaped optical information recording medium 1 made of a substrate 2 coated with an ultraviolet curable resin is placed thereon, and a turntable 5 is rotated. Next, nitrogen is introduced from the nitrogen inlet 10 to replace the inside of the container 9 with nitrogen. Next, ultraviolet rays 7 are irradiated from the ultraviolet ray irradiation device 6.

This ultraviolet irradiation device 6 is located above the container 9.
Since it is located parallel to the optical information recording medium 1 and rotates the turntable 5, it is necessary to cover at least the optical information recording medium 1 from the center to the end. Figure 3(a), (
In b), it is installed so as to cover the entire semicircle of the optical information recording medium 1, but it may be installed so as to cover the entire optical information recording medium 1, and its size does not matter.

Ultraviolet light 7 irradiated from the ultraviolet irradiation device 6
The UV light passes through the ultraviolet transmitting member 8 that seals the upper part of the container 9 and advances into the container 9. Since the ultraviolet ray irradiation device 6 and the optical information recording medium 1 are parallel to each other, the ultraviolet rays 7 are irradiated perpendicularly to the substrate surface of the optical information recording medium 1 to record optical information on the surface of the substrate 2 of the optical information recording medium 1. The ultraviolet curable resin of the medium constituting layer 3 is easily cured, and the ultraviolet curable resin 4 protruding from the end surface of the substrate 2 is difficult to cure.

The rotation speed of the turntable 5 varies depending on the intensity of the ultraviolet rays 7, the size of the ultraviolet irradiation device 6, and the size of the optical information recording medium 1.

By using such a mechanism for curing the ultraviolet curable resin through ultraviolet irradiation, the optical information recording medium constituting layer 3 on the substrate surface can be easily converted into an ultraviolet curable resin by appropriately changing the ultraviolet irradiation time, ultraviolet intensity, and N2 purge amount. While at least the surface of the resin is cured, the ultraviolet curable resin 4 protruding from the end surface of the substrate can be left uncured.

Next, a mechanism for removing the ultraviolet curing resin 4 protruding from the end surface of the substrate of the optical information recording medium manufacturing apparatus of the present invention will be explained. In FIGS. 3(a) and 3(b), the melting discharge nozzle 13 extends through the ultraviolet transmitting member 8 to near the surface of the optical information recording medium constituent layer 3 of the optical information recording medium 1. The position is above the center of the optical information recording medium 1, and in FIGS.
Although it is installed on the semicircular side of the optical information recording medium 1, it may be placed on the same semicircular side as the optical information recording medium 1, and its position may be anywhere above the center of the optical information recording medium 1.

A solvent is discharged from the tip of the melt discharge nozzle 13, but this solvent may be any solvent as long as it does not dissolve the substrate 2, and it does not matter whether the solvent dissolves the ultraviolet curable resin or not. This is to wash away the liquid, uncured ultraviolet curable resin 4 protruding from the end surface of the substrate 2 by the force of the solvent scattering while rotating the optical information recording medium 1.

At least the surface of the ultraviolet curable resin of the optical information recording medium constituting layer 3 on the surface of the substrate of the optical information recording medium 1 is cured, and the ultraviolet curable resin 4 protruding from the end surface of the substrate is not cured. At this time, the solvent is discharged from the solvent discharge nozzle 13 onto the surface of the optical information recording medium constituting layer 3 of the optical information recording medium 1 while the ultraviolet irradiation is continued. At this time, the discharge pressure of the solvent is
Although it varies depending on the ultraviolet curable resin used and the degree of its internal hardening, at least the hardened portion of the surface of the optical information recording medium constituent layer 3 should not be deformed by the discharge of the solvent.

Since the optical information recording medium 1 is rotating, the discharged solvent flows from the center to the ends due to centrifugal force. At this time, dust and the like adhering to the surface of the optical information recording medium constituting layer 3 in the cured state can be easily removed at the same time. Board 2
The solvent flowing to the edge of the substrate scatters to the outside, and the force of this scattering washes away the uncured ultraviolet curable resin 4 protruding from the edge of the substrate. Further, the scattering force of the solvent varies depending on the rotational speed of the turntable 5 at this time, and the force for washing away the uncured ultraviolet curable resin 4 protruding from the end surface of the substrate varies, so it may be adjusted appropriately.

After washing away the uncured ultraviolet curable resin 4 protruding from the end surface of the substrate onto the optical information recording medium 1, the discharging of the solvent from the solvent discharging nozzle 13 is terminated.

Thereafter, if the ultraviolet curable resin of the optical information recording medium constituting layer 3 on the surface of the substrate of the optical information recording medium 1 is not completely cured to the inside, ultraviolet ray irradiation is continued to completely cure it.

As explained above, the manufacturing apparatus of the present invention allows the ultraviolet curable resin 4 to protrude onto the end surface of the substrate during curing of the ultraviolet curable resin of the optical information recording medium constituent layer 3 on the substrate surface of the optical information recording medium 1. can be removed, and the optical information recording medium 1 shown in FIG. 1 can be obtained.

Next, the second aspect of the present invention will be explained. The optical information recording medium of the present invention is shown in FIG. 4, and consists of a substrate 15 and a recording layer of a recording area 16, and there is no protrusion of the recording film in the non-recording area 17 at the outer peripheral edge.
No. 8 has no wrapping of the recording film.

In this optical information recording medium 14, after forming the recording layer of the recording area 16 by a normal method, the recording film of the non-recording area 17 at the outer peripheral edge is removed, and the recording layer wrapped around the back surface 18 of the substrate is removed. It can be manufactured by removing the membrane.

Next, the optical information recording medium manufacturing apparatus of the present invention will be explained. The optical information recording medium manufacturing apparatus of the present invention includes a means for removing the recording film in the non-recording area at the outer peripheral edge of the recording layer coated surface, and a means for removing the recording film in the non-recording area at the outer peripheral edge of the recording layer coated surface. It consists of means for detecting whether or not the removal is being performed normally, and means for correcting the removal means so that the detection means can normally remove the recording film from the non-recording area at the outer peripheral edge of the recording layer coating surface.

The means for removing the recording film in the non-recording area at the outer peripheral edge of the recording layer coating surface of the optical information recording medium manufacturing apparatus of the present invention will be explained. First, as shown in FIG. 5, the substrate 15 coated with the recording layer is rotated on the turntable 19. Then, the nozzle 20 that continuously discharges the recording film dissolving agent 21 from a distance of the substrate 15 is slowly aimed at the target position.
That is, the recording film is moved to the boundary between the recording area 16 and the non-recording area 17 at the outer peripheral edge, and the recording film in the non-recording area 17 at the outer peripheral edge is removed, and then the nozzle 20 is moved to the boundary between the recording film dissolving agent 21 and the substrate 15 is removed. move it far away. By starting and ending the discharging of the dissolving agent far from the substrate 15 in this way, dissolving agent pools at the tip of the nozzle 20 at the start and end of discharging, fluctuations in the discharging pressure at the start of discharging, and changes in the nozzle 20 at the end of discharging. Recording area 1 due to scattering of the dissolving agent 21 at the tip, etc.
Since the dissolving agent 21 can be prevented from scattering to the recording layer 6, and the nozzle 3 is moved slowly, the coating liquid can be removed near the substrate 15 with a very stable discharge pressure of the dissolving agent 21.

In the present invention, by moving the nozzle 20, the substrate 1
The dissolving agent 21 is applied to the end face of the substrate 5, causing scattering, but by selecting the angle of the nozzle 20, the centrifugal force generated by the rotation of the turntable 19 can be used to repel the dissolving agent 21 to the outside of the substrate. Nozzle 2
As shown in FIG. 6, the angle of 0 is such that the dissolving agent 21 is discharged toward the outer circumference of the substrate 15, and if θ is the angle between the vertical direction of the substrate 15 and the nozzle 20, θ=30°~
At 60°, the most stable result is obtained without scattering of the dissolving agent at the end face of the substrate 15.

Although the distance w between the nozzle 20 and the surface of the substrate 15 and the diameter of the discharge port of the nozzle 20 are not very important factors in the removal method shown in FIG.
= 2 to 3 mm, and the diameter of the ejection opening of the nozzle 20 varies depending on the ejection amount and type of the dissolving agent 21, but
The thickness is preferably less than 0.3 mm depending on the finish of the boundary between the non-recording area 17 at the outer peripheral end. The rotation speed of the substrate 15 varies depending on the discharge amount and type of the dissolving agent 21, but is preferably 1500 to 2000 rpm depending on the finish of the boundary between the recording area 16 and the non-recording area 172b at the outer peripheral edge. Further, the discharge pressure of the dissolving agent 22 is set to the lowest pressure at which the recording film on the rotating substrate 15 is dissolved, that is,
Select a solvent that can dissolve without applying too much pressure.

The dissolving agent 21 used in the present invention needs to be a solvent that has high solubility in the recording film and high viscosity. The reason for this is that when a low-viscosity dissolving agent is used, a large bleed occurs regardless of the rotation speed of the substrate 1, and when an attempt is made to remove the entire non-recording area 17 at the outer peripheral edge, the large bleed causes dissolution within the recording area 16. agent 21 enters. Therefore, the solubilizing agent used in the present invention is preferably a solvent having a viscosity of 1.1 cp or more at 25°C, such as cellosolve solvents such as 2-methoxyethanol, 2-ethoxyethanol, and 2-butoxyethanol, diacetone alcohol, Examples include ketone alcohol solvents such as 3-hydroxy-3-methyl-2-butanone. In addition, a solvent with high solubility for the recording film is used, but solvents that significantly dissolve the substrate, such as halogen-based solvents such as chloroform, dichloroethane, and trichlene, ketone-based solvents such as acetone and methyl ethyl ketone, and ethers such as diethyl ether, are used. It is not preferable to use a solvent alone. However, it can be used as long as these are mixed with the aforementioned highly viscous cellosolve, ketone alcohol, or alcohol solvents to reduce the dissolving power to the substrate, sufficiently dissolve the coating liquid, and meet the viscosity conditions. .

Furthermore, in the present invention, almost at the same time as removing the recording film attached to the non-recording area 17 at the outer peripheral end of the substrate 15, the recording film that has wrapped around the back surface 18 of the substrate 15 is also removed as shown in FIG. Here, the nozzle 22 is connected to the back surface 1 of the substrate 15.
The recording film wrapped around the substrate 8 is fixed inside, and the entire recording film on the back surface 18 of the substrate is removed by the centrifugal force of the turntable 19. This is because the dissolving agent scatters when the nozzle 22 is moved. The diameter of the discharge port of the nozzle 22, the distance between the nozzle 22 and the substrate 15, and the discharge pressure of the nozzle 22 are not particularly limited, and the dissolving agent is not subject to the above-mentioned viscosity restrictions, and is capable of dissolving the substrate. In addition, it is a solvent that can sufficiently dissolve the coating liquid, and does not necessarily have to be the same as the coating liquid dissolving agent attached to the non-recording area 17 on the outer peripheral edge of the substrate 15.

Furthermore, by discharging the dissolving agent from both the nozzles 20 and 22, the recording film adhering to the end surface of the substrate 15 can be removed, resulting in a clean appearance when the air sandwich structure is formed. With the removing means of the present invention, unnecessary recording films can be removed over the entire surface of the substrate.

The substrate used must be transparent to the laser used when recording and reproducing. As the substrate material, plastics such as acrylic resin, vinyl chloride copolymer resin, polycarbonate, etc. can be used, and preformats such as address signals and guide grooves may be formed on the substrate surface.

The coating liquid for the organic recording layer is generally a coating liquid containing a dye, etc., and examples of the dye include polymethine-based, naphthalocyanine-based, phthalocyanine-based, tetrahydrocholine-based, dioxazine-based, and trihydrocyanine-based dyes. Examples include one or a mixture of two or more of various dyes such as phenothiazine-based, phenanthrene-based, anthraquinone-based, xanthene-based, triphenylmethane-based, triphenylamine-based, and azulene-based dyes. It may also contain other storage stabilizers, polymer agents, dispersants, flame retardants, lubricants, plasticizers, etc.

[0060] The undercoat layer also has the following properties: (1) improves adhesion, (2) acts as a barrier against water or gas, (2) improves the storage stability of the recording layer, (2) improves reflectance, (2) protects the substrate from solvents, and (3) serves as a preservative. It may be formed before forming the recording layer for the purpose of forming grooves or the like. For the purpose of ■, polymeric materials, e.g.
Various polymeric substances such as ionomer resins, polyamide resins, vinyl resins, natural resins, natural polymers, silicones, liquid rubbers, and silane coupling agents can be used. In addition to polymers, inorganic compounds such as SiO2, MgF2, SiO,
ZnO, TiN, SiN, etc.; metals or semimetals, such as Zn, Cu, Si, Ni, Cr, Ge, Se, Au,
Ag, Al, etc. can be used. For the purpose of (2), metals such as Al, Ag, etc. or organic thin films with metallic luster, such as methine dyes, xanthene dyes, etc., can be used, and for the purposes of (2) and (3), ultraviolet curing can be used. Resin, thermoplastic resin, and thermosetting resin can be used.

The protective layer may be formed after the recording layer is formed for the purposes of (1) protecting the recording layer from scratches, dust, dirt, etc., (2) improving storage stability of the recording layer, and (2) improving reflectance. For these purposes, mention may be made of the materials listed above for the undercoat layer.

The adhesive is not particularly limited and any known adhesive may be used, but photocurable adhesives, urethane adhesives, silicone adhesives, acrylic adhesives, and hot melt adhesives are preferred.

Another means for removing the recording film in the non-recording area at the outer peripheral edge of the optical information recording medium manufacturing apparatus of the present invention will be explained. The substrate coated with the recording layer is rotated on a turntable, and the wiping member impregnated with the recording film dissolving agent is slowly moved from above the substrate to the desired position, that is, the non-recording area at the outer peripheral edge, and is crimped. , thereby removing the recording film in the non-recording area at the outer peripheral edge. After removal,
The process is finished by moving the wiping member away from above the substrate.

In the removing means of the present invention, the recording film in the non-recording area at the outer circumferential edge can be removed very stably because it moves slowly and presses the recording film.

[0065] The pressing force of the wiping member to the substrate is as follows:
This depends on the rotation speed of the turntable and the material of the wiping member, and the degree to which the recording film dissolved by the recording film dissolving agent that has soaked into the wiping member is absorbed and the damage to the substrate are taken into consideration.

The dissolving agent to be used is not particularly limited as long as it does not dissolve the substrate but dissolves the recording film, and the wiping member to be used has a high ability to absorb the dissolving agent and is suitable for cleaning the substrate. There are no particular restrictions as long as it doesn't cause any harm.

The removing means of the present invention also removes the recording film that has wrapped around the back surface of the substrate at the same time as removing the recording film in the non-recording area at the outer peripheral edge of the substrate. The means for removing the recording film on the back surface of the substrate may be carried out in the same manner as the means for removing the recording film on the non-recording area at the outer circumferential edge, except that the wiping member is moved from below the substrate to the desired position and pressed.

Next, a description will be given of means for detecting whether or not the recording film in the non-recording area at the outer peripheral edge of the optical information recording medium manufacturing apparatus of the present invention is being properly removed.

As means for detecting an abnormality in the removal of the recording film in the non-recording area at the outer circumferential edge, there is a means of irradiating the non-recording area at the outer circumferential edge with a laser beam and detecting the reflected light or transmitted light. As shown in FIG. 8(a), the laser 23 is irradiated onto all the non-recording areas 17 at the outer circumferential edge, passes through the cylindrical lens 25, and the detector array 24 detects abnormalities in the removal of the recording film in the non-recording areas 17 at the outer circumferential edge. It is something to do.

Furthermore, as shown in FIG. 8(b), by irradiating the laser 23 only to the boundary between the non-recording area 17 and the recording area 16 at the outer circumferential edge, abnormalities in the removal of the recording film from the non-recording area 17 at the outer circumferential edge can be detected. This is to detect.

Another means for detecting an abnormality in the removal of the recording film in the non-recording area at the outer peripheral edge is a means for detecting the scattering state of a recording film dissolving agent. limited to cases where the

This principle is based on the fact that if the recording film cannot be dissolved due to a reason such as the discharge pressure of the recording film dissolving agent being weak, the recording film dissolving agent will dissolve as shown in FIG. 9(a). The recording film dissolving agent 21 is applied only in a certain direction determined by the ejection direction of 21, the ejection pressure, and the rotation speed of the turntable 19.
This method utilizes the phenomenon that when the recording film is completely removed, the recording film dissolving agent 21 scatters almost uniformly over the entire circumference as shown in FIG. 9(b).

Therefore, as a practical method for detecting an abnormality in the removal of the recording film in the non-recording area at the outer peripheral edge based on the scattering state of the recording film dissolving agent 21, as shown in FIG. 10(a), A detector 27 is installed at a position where the recording film dissolving agent 21 flies off when the recording film does not dissolve as described above, and if a certain amount or more of the recording film dissolving agent 21 is scattered at the detector 27, the recording film dissolving agent 21 is removed or more. Furthermore, as shown in FIG. 10(b), one or more detectors 27 are installed at a position other than the singular point shown in FIG. If the film 21 is not scattered, it is determined that the removal is more than necessary, and various setting values for recording film removal in the non-recording area 17 at the outer peripheral end are corrected.

By the method described above, in the optical information recording medium manufacturing apparatus of the present invention, it is detected whether or not the recording film in the non-recording area at the outer peripheral edge is being normally removed;
The removal means can be corrected so that it is performed normally, and a flowchart thereof is shown in FIG.

[0075]

[Examples] Next, examples of the present invention and comparative examples will be given and explained. Example 1 A hard coat layer (ultraviolet curing resin SD-17 manufactured by Dainippon Ink and Chemicals Co., Ltd.) was applied to the reading surface side of a polycarbonate substrate to a thickness of about 3 μm using a spinner. This polycarbonate substrate was placed in a container (150 mmφ x 90 mm height), and the hard coat layer was cured under the following conditions: N2 purge amount 7 l/min, ultraviolet intensity 70 mw/cm2 (peak value), and ultraviolet irradiation time 15 seconds. It was confirmed by a tack test that the hard coat agent on the end surface of the substrate was in an uncured state and the hard coat on the surface of the substrate was in a cured state. Next, remove unnecessary hard coating agent from the edge of the board using Tex Wipe's Alpha Wiper (Class 100).
(compatible) and further N2 purge amount 20l/min
Then, curing was performed again at an ultraviolet intensity of 70 mw/cm2 (peak value) and an ultraviolet irradiation time of 10 seconds.

Example 2 The same operation as in Example 1 was carried out except that commercially available tissue paper was used as a member for wiping off unnecessary hard coating agent from the end surface of the substrate.

Comparative Example 1 A hard coat layer (ultraviolet curing resin SD-17 manufactured by Dainippon Ink and Chemicals Co., Ltd.) having a thickness of about 3 μm was coated on the reading surface side of a polycarbonate substrate using a spinner. After that, use Alpha Wiper manufactured by Tex Wipe Co., Ltd. (class 100 compliant) to wipe off the unnecessary hard coating agent on the edge of the board, followed by N2 purge amount 20l/min, UV intensity 70mw/cm2 (peak value), UV irradiation time 30
The hard coat agent was cured under conditions of sec.

Comparative Example 2 The same operation as in Comparative Example 1 was carried out except that commercially available tissue paper was used as a member for wiping off unnecessary hard coating agent from the end surface of the substrate.

Five substrates each having a hard coat layer formed in Examples 1 to 2 and Comparative Examples 1 to 2 above were prepared, and they were subjected to a disk defect inspection device manufactured by FUTEC to detect defects before and after the hard coat treatment. We investigated the occurrence and change status of The results are shown in Table 1.

[0080]

[Table 1]

Example 3 A hard coat layer (ultraviolet curable resin SD-17 manufactured by Dainippon Ink and Chemicals Co., Ltd.) having a thickness of about 3 μm was coated on the reading surface side of a polycarbonate substrate using a spinner. This polycarbonate substrate was placed in a container (150 mmφ x 90 mm height), and the hard coat layer was cured under the following conditions: N2 purge amount 7 l/min, ultraviolet intensity 70 mw/cm2 (peak value), and ultraviolet irradiation time 15 seconds. It was confirmed by a tack test that the hard coat agent on the end surface of the substrate was in an uncured state, and the hard coat layer on the surface of the substrate was in a hardened state.

Next, this substrate was rotated at 1000 rpm, and distilled water was continuously discharged from the nozzle for 10 seconds from near the center of the substrate as shown in FIG. Ta.

[0083] After that, the amount of N2 purge was further increased to 20 l/m.
Curing was performed again at an ultraviolet light intensity of 70 mw/cm2 (peak value) and an ultraviolet irradiation time of 10 seconds.

Example 4 The same operation as in Example 3 was carried out except that ethanol was used as a solvent for removing unnecessary hard coating agent from the end surface of the substrate.

Example 5 2-
The same operation as in Example 3 was performed except that methoxyethanol was used.

Further, regarding the substrates on which the hard coat layers formed in Examples 3 to 5 were formed, the degree of removal of unnecessary ultraviolet curing resin from the end surfaces of the substrates was visually observed. Table 2 shows the results.
Shown below.

[0087]

[Table 2]

Example 6 1M dye of chemical formula 1 was applied to a 130φ polycarbonate substrate.
It was dissolved in a solvent adjusted to have a weight composition of eOH/iPA/1,2 dichloroethane = 7:2:1, and this solution was coated with a spinner to form a recording layer having a thickness of 900 Å. and figure 5
Using 2-ethoxyethanol as a solvent, the unnecessary recording film on the outer periphery of the recording area on the coating surface of the recording layer and on the back surface of the substrate was removed by the method shown in FIG. However, at this time, the settings for removing unnecessary recording film on the recording surface side are a nozzle diameter of 3φmm and a discharge pressure of 4kg.
/mm2. Furthermore, Fig. 8(a),(b)
Ten samples were obtained using the laser beam removal abnormality detection system (see FIG. 11).

[0089]

[Chemical formula 1]

Example 7 In Example 6, the discharge pressure of 2-ethoxyethanol was changed to 2
The unnecessary recording film was removed in the same manner as in Example 6, except that the amount was changed to kg/mm2.

Comparative Example 3 An unnecessary recording film was removed in the same manner as in Example 6, except that the unnecessary recording film removal abnormality detection system was not used and the discharge pressure was 7 kg/mm 2 .

Comparative Example 4 An unnecessary recording film was removed in the same manner as in Example 6, except that the unnecessary recording film removal abnormality detection system was not used.

As described above, regarding the polycarbonate substrates from which the unnecessary recording films obtained in Examples 6 and 7 and Comparative Examples 3 and 4 have been removed, the defect rate and unnecessary defects at the radius position of 58 to 60 mm of the polycarbonate substrates before and after the unnecessary recording films were removed. Abnormalities in recording film removal were visually observed. The results are shown in Table 3.

[0094]

[Table 3]

[0095]

As is clear from the above description, according to the first aspect of the present invention, the ultraviolet curable resin protruding from the end surface of the substrate can be removed without affecting the layers constituting the optical information recording medium on the surface of the substrate. Since it can be easily removed during the ultraviolet curing process, it is possible to provide an optical information recording medium that is highly efficient and has a good appearance.

According to the second aspect of the present invention, the recording film in the non-recording area at the outer peripheral edge of the substrate or the recording film that has wrapped around the back surface of the substrate can be completely removed without damaging the recording layer in the recording area. It is possible to provide an optical information recording medium with an air sandwich structure that can be removed and has a high reliability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an optical information recording medium of the present invention.

FIG. 2(a) is a cross-sectional view of an optical information recording medium manufacturing apparatus equipped with a mechanism for removing ultraviolet curable resin protruding from the end surface of a substrate with a wiping member according to the present invention, and FIG. 2(b) is a top view thereof.

FIG. 3(a) is a sectional view of an optical information recording medium manufacturing apparatus equipped with a mechanism for removing ultraviolet curable resin protruding from the end surface of a substrate according to the present invention with a solvent, and FIG. 3(b) is a top view thereof.

FIG. 4 is a cross-sectional view of the optical information recording medium of the present invention.

FIG. 5 is a schematic explanatory diagram showing a means for removing a recording film in a non-recording area at the outer peripheral end of a recording layer coating surface of the optical information recording medium manufacturing apparatus of the present invention.

FIG. 6 is a schematic explanatory diagram showing means for removing the recording film in the non-recording area at the outer peripheral end of the recording layer coating surface of the optical information recording medium manufacturing apparatus of the present invention.

FIG. 7 is a schematic diagram showing a means for removing a recording film in a non-recording area at the outer peripheral edge of a recording layer coating surface and a means for removing a recording film that has wrapped around the back surface of a substrate in the optical information recording medium manufacturing apparatus of the present invention; Explanatory diagram.

FIG. 8 is a schematic explanatory diagram showing a means for detecting whether the recording film in the non-recording area at the outer peripheral end of the recording layer coating surface of the optical information recording medium manufacturing apparatus of the present invention has been normally removed; a
) is an explanatory diagram in which the entire non-recording area at the outer edge is irradiated with a laser, and detection is performed using the reflected or transmitted light. (b) is an explanatory diagram in which the laser is irradiated only on the boundary between the non-recording area and the recording area at the outer edge, and the detection is performed using the reflected or transmitted light. An explanatory diagram of detection using reflected light or transmitted light.

FIG. 9 is a schematic explanatory diagram showing the principle of another means for detecting whether the removal of the recording film in the non-recording area at the outer peripheral edge of the recording layer coating surface of the optical information recording medium manufacturing apparatus of the present invention has been performed normally; (a) is an explanatory diagram showing the state of scattering of the recording film dissolving agent when the recording film cannot be completely dissolved, and (b) is an explanatory diagram showing the state of scattering of the recording film dissolving agent when the recording film can be completely removed. An explanatory diagram showing.

FIG. 10 is a schematic explanatory diagram showing another means for detecting whether the recording film in the non-recording area at the outer peripheral end of the recording layer coating surface of the optical information recording medium manufacturing apparatus of the present invention has been normally removed; , (a) is an explanatory diagram for detecting the flying recording film dissolving agent when the recording film cannot be completely dissolved, and (b) is an explanation for detecting the flying recording film dissolving agent when the recording film is completely removed. figure.

FIG. 11 is a flowchart for detecting whether or not the recording film in the non-recording area at the outer peripheral edge of the optical information recording medium manufacturing apparatus of the present invention is being normally removed, and correcting the removal means so that the removal is being done normally; .

FIG. 12 is a cross-sectional view of a conventional optical information recording medium.

FIG. 13 is a schematic explanatory diagram showing a general ultraviolet irradiation device.

FIG. 14 is a cross-sectional view of a conventional optical information recording medium.

FIG. 15 is a schematic explanatory diagram showing a conventional method for removing a recording film in a non-recording area at the outer peripheral edge of a recording layer coating surface.

[Explanation of symbols] 1 Optical information recording medium 2 Substrate 3 Optical information recording medium constituent layer 4 Protruding ultraviolet curing resin 5 Turntable 6 Ultraviolet irradiation device 7 Ultraviolet ray 8 Ultraviolet transmitting member 9 Container 10 Nitrogen inlet 11 Wiping member 12 Wiping Member support 13 Solvent discharge nozzle 14 Optical information recording medium 15 Substrate 16 Recording area 17 Non-recording area 18 Substrate back surface 19 Turntable 20 Nozzle 21 Dissolving agent 22 Nozzle 23 Laser 24 Detector array 25 Cylindrical lens 26 Detector 27 Detector 28 Optical information recording medium 29 Substrate 30 Optical information recording medium constituent layer 31 Protruding ultraviolet curable resin 32 Ultraviolet irradiation device 33 Ultraviolet rays 34 Turntable 35 Container 36 Ultraviolet transmitting member 37 Nitrogen inlet 38 Optical information recording medium 39 Substrate 40 Recording layer 41 Unnecessary recording layer 42 Recording film wrapped around the back side of the substrate 43 Recording area 44 Non-recording area 45 Turntable 46 Nozzle

Claims (15)

[Claims] 1. An optical information recording medium having an optical information recording medium constituent layer made of an ultraviolet curable resin, characterized in that the ultraviolet curable resin does not protrude from the end surface of the substrate of the optical information recording medium. Medium. 2. In an optical information recording medium having an optical information recording medium constituent layer made of an ultraviolet curable resin, in the process of applying the ultraviolet curable resin and curing the optical information recording medium constituent layer by ultraviolet irradiation, When or while the ultraviolet curable resin protruding from the substrate edge is in an uncured state and at least the vicinity of the surface of the optical information recording medium component layer is cured, the ultraviolet curable resin protrudes from the substrate edge. A method for producing an optical information recording medium, comprising removing an ultraviolet curable resin. 3. The method for manufacturing an optical information recording medium according to claim 2, wherein in removing the ultraviolet curable resin, the ultraviolet curable resin protruding from the end surface of the substrate is wiped off with a wiping member. 4. The method of manufacturing an optical information recording medium according to claim 2, wherein in removing the ultraviolet curable resin, the ultraviolet curable resin protruding from the end surface of the substrate is removed with a solvent while rotating. [Claim 5] In an optical information recording medium manufacturing apparatus,
A mechanism for curing a layer constituting an optical information recording medium made of an ultraviolet curable resin by irradiating ultraviolet rays; and a mechanism for removing the ultraviolet curable resin protruding from the edge surface of the substrate when or while at least the vicinity of the surface of the optical information recording medium constituent layer is cured. A manufacturing device for optical information recording media. 6. The optical information recording medium manufacturing apparatus according to claim 5, wherein the mechanism for removing the ultraviolet curable resin protruding from the end surface of the substrate is a mechanism for wiping it with a wiping member. Recording media manufacturing equipment. 7. The optical information recording medium manufacturing apparatus, wherein the mechanism for removing the ultraviolet curable resin protruding from the end surface of the substrate is a mechanism for removing the ultraviolet curable resin with a solvent while rotating the optical information recording medium. The optical information recording medium manufacturing apparatus according to claim 5. 8. An optical information recording medium having a recording layer containing a dye as a main component, characterized in that there is no protrusion of the recording film in the non-recording area at the outer peripheral edge of the recording layer coating surface. 9. An optical information recording medium having a recording layer containing a dye as a main component, characterized in that the recording film does not wrap around the back surface of the substrate. 10. An apparatus for manufacturing an optical information recording medium having a recording layer containing a dye as a main component, comprising means for removing a recording film in a non-recording area at an outer peripheral edge of a coating surface of the recording layer; A means for detecting whether or not the recording film in the area has been normally removed, and a means for correcting the removing means so that the recording film in the non-recording area at the outer peripheral edge is normally removed by the detecting means. An apparatus for manufacturing an optical information recording medium, characterized in that: 11. The means for removing the recording film in the non-recording area at the outer peripheral end of the recording layer coating surface coats the recording layer while holding the substrate with a spinner, and then removes optical information from the rotating optical information recording medium. A nozzle that continuously discharges a recording film dissolving agent from a distance from the recording medium moves slowly to the target position, removes the recording film in the non-recording area at the outer peripheral edge, and then discharges the recording film dissolving agent while the nozzle continues to eject the recording film dissolving agent. A means for removing a recording film in a non-recording area at an outer circumferential edge of the optical information recording medium by moving the information recording medium to a far distance, and a means for correcting the removal means detecting the recording film from a nozzle by a detection means. 11. The optical information recording medium manufacturing apparatus according to claim 10, further comprising means for adjusting the discharge pressure of the dissolving agent. 12. The means for detecting whether the recording film removal from the non-recording area at the outer peripheral edge of the optical information recording medium is normally performed detects the scattering state of the recording film dissolving agent discharged from the nozzle. 12. The optical information recording medium manufacturing apparatus according to claim 11, wherein the optical information recording medium manufacturing apparatus is a means. 13. The means for removing the recording film in the non-recording area at the outer circumferential edge of the recording layer coating surface coats the recording layer while holding the substrate with a spinner, and then removes the recording film from the rotating optical information recording medium. The means for removing the recording film in the non-recording area at the outer peripheral end of the optical information recording medium by a wiping member impregnated with a dissolving agent, and the means for correcting the removing means detecting the optical information recording of the wiping member by means of a detection means. 11. The apparatus for manufacturing an optical information recording medium according to claim 10, wherein the apparatus is a means for adjusting the pressing force against the non-recording area at the outer peripheral edge of the medium. 14. The means for detecting whether the recording film removal from the non-recording area at the outer peripheral end of the optical information recording medium is performed normally is a detection means based on a change in the intensity of reflected light or transmitted light of a laser beam. Claim 1 characterized in that
0. The apparatus for manufacturing an optical information recording medium according to 0. 15. The optical information recording medium manufacturing apparatus comprises:
A means for removing the recording film that has wrapped around the back surface of the substrate, a means for detecting whether or not the unnecessary recording film on the back surface of the substrate has been normally removed, and a means for detecting whether the unnecessary recording film on the back surface of the substrate has been normally removed by the detecting means. Claims 10 and 11, further comprising means for correcting the removing means so that
or 13. The optical information recording medium manufacturing apparatus according to 13.