JPH0750037A - Manufacture of optical information recording medium - Google Patents

Abstract

PURPOSE:To manufacture an optical information recording medium whose bonding strength is improved and manufacture an optical information recording medium whose cut end is sealed satisfactorily by a simple method. CONSTITUTION:A laminated unit composed of a transparent substrate, an optical recording layer, a hot-melt adhesive layer, a support substrate, etc., is cut by a laser beam and the surrounding part of the cut part is pressed in the thickness direction immediately after the cutting while the surrounding part is still in a melted state by the heat of the cutting. Or, a laminated board 123 is cut by a large diameter laser beam 105 and a slit 114 is formed between an optical recording medium of an original size and a remaining material 124. Curing type resin 107 is cast into the slit and, after the resin is cured, the cured resin part is cut by a small diameter laser beam 109 to seal the cut end part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The first invention of the present invention relates to a method of manufacturing an optical information recording medium for optically recording and reproducing information, and more particularly to a method of cutting an optical information recording medium.

A second invention of the present invention relates to a method for manufacturing an optical information recording medium, and more particularly to a method for manufacturing an optical information recording medium for optically recording / reproducing information by cutting it from a work size.

[0003]

[Prior art]

PRIOR ART OF THE FIRST INVENTION OF THE PRESENT INVENTION Conventionally, as an information recording medium, a circular substrate such as a CD or an optical disk is formed into a predetermined size by injection molding, and the final product is obtained by laminating these. There are those that make a large size such as optical cards and optical cards in advance, and finally cut and shape it into its final form.

The present invention belongs to the latter. For example, in the case of an optical card, it is a general manufacturing method that a card is prepared in advance with a substrate having a size larger than the card size, and finally cut and shaped into the card size.

As a mass-production cutting method for cards, methods such as punching, punching with a hollow blade, laser cutting, and router cutting have been proposed, but in terms of processing speed, capacity, cost of equipment, maintenance, etc., The punching method of is overwhelmingly adopted.

Conventional Technique of the Second Invention of the Present Invention Conventionally, as an optical information recording medium, a circular substrate such as a CD or an optical disk is formed into a predetermined size by injection molding, and these are bonded together. Depending on the product, there are products that will be the final product, and products that will be made in large sizes, such as optical cards, and then cut and shaped into the final shape.

The present invention relates to the latter optical information recording medium. For example, in the case of an optical card, a card is prepared in advance with a substrate having a work size larger than the card size, and finally cut into the card size.・ Shaping is the general manufacturing method.

Mass production cutting methods for work size cards include (1) punching with a plate die or hollow blade, and (2)
Although methods such as laser cutting and (3) router cutting have been proposed, the punching method (1) is predominantly adopted from the viewpoints of processing speed, capacity, device cost, maintenance and the like.

Further, in the case of an optical card, conventionally, an uneven preformat is formed in advance on a transparent substrate having a size larger than the card size, and an optical recording layer is formed on the preformat side of the transparent substrate. The transparent substrate on which the layers are formed is attached to a supporting substrate using an adhesive, and further cut into a card size using the above-mentioned cutting method.

At this time, as shown in FIG. 9, the cut surface is in a state where the end portions of the transparent substrate 101, the optical recording layer 102, the adhesive 103 and the supporting substrate 104 are in contact with the outside air. However, in this state, in the case of an optical recording medium in which the optical recording layer is made of a low melting point metal such as Te or an alloy thereof, an oxide, or a carbide, deterioration of the optical recording layer due to infiltration of moisture or oxygen occurs, Further, in the case of an organic dye, particularly a dye-based coating type optical recording material, deterioration of the optical recording layer occurs due to penetration of an organic solvent. Further, both of them have low adhesion to the transparent substrate, so that peeling easily occurs from the cut end.

Therefore, conventionally, in order to prevent the optical recording layer from being exposed at the cut end, as shown in FIG. 7, patterning of the optical recording layer by masking with a metal-based optical recording material, or with a dye-based optical recording material, Patterning is performed by applying in a pattern using masking or gravure printing.

As a method without patterning, as shown in FIG. 8, the sealing agent 11 is applied to the cut end after cutting.
It is sealed with 0. For example, sealing is performed by coating or bonding a protective resin.

Further, as disclosed in Japanese Patent Application No. 3-152238, a thermoplastic resin is laminated on the optical recording layer and cut from the thermoplastic resin side with a laser. There is a method in which a thermoplastic resin is melted at the end portion of the card and sealing is performed.

[0014]

[Problems to be Solved by the Invention]

[Problem to be solved by the first invention of the present invention] However, in the above-mentioned punching and cutting, when the optical information recording medium is a laminated body, peeling at the interface becomes a problem.

In the case of an information recording medium such as an optical card, there is often a laminated structure in which a substrate having an optical recording layer and a member for protecting the recording layer are laminated via an adhesive layer. When punching and cutting such a laminated body at the same time, the resistance due to the cutting blade differs depending on the material of each layer constituting each laminated body,
The stress at the interface of each layer of the laminate results in delamination of the laminate.

For this reason, when an acrylic resin is used as the substrate, a method such as heat cutting has been adopted in order to improve the poor impact resistance. However, this heating lowers the adhesive strength and the peeling of the adhesive occurs. It became a real concern. In the case of such an optical information recording medium that is written in the heat mode, heating the recording medium is not preferable because it causes noise in the recording signal, the auto tracking signal and the like.

On the other hand, in the case of cutting with a laser beam, it is not necessary to heat the recording medium, and it is possible to perform cutting with high precision, which is excellent when an acrylic resin substrate is used.

However, in the case of cutting with a laser beam, the cutting is performed by the heat generated by the irradiation of the beam, so that the heat is also transmitted to the periphery of the cutting portion, and the laminated transparent substrate, adhesive, support substrate, etc. There is a problem in that the recording medium is temporarily in a heat-melted state, and as a result, the adhesive strength of the outer peripheral portion is reduced, and moisture and oxygen easily enter, and the durability of the recording medium deteriorates.

For this reason, after cutting with a laser beam, if the laminate is laminated again near the softening point temperature of the adhesive, the adhesive strength of the outer peripheral portion is improved and it becomes difficult for water and oxygen to enter from the outside. It is desirable to avoid heating the optical information recording medium as much as possible because it is not preferable in terms of signal characteristics and the process becomes complicated.

The present invention has been made in order to improve the above-mentioned drawbacks of the prior art. Immediately after laser cutting of a laminated body using a hot melt adhesive, the cut portion is in a hot melt state. It is an object of the present invention to provide a method for producing an optical information recording medium, in which the adhesion is improved by pressing the periphery of the cut portion of the laminate, and there is no need to heat-laminate again.

The problem to be solved by the second invention of the present invention However, in the method of patterning the optical recording layer by masking of the above-mentioned conventional example or protecting the cut end portion by the patterned application of the optical recording material, However, there are drawbacks that the process is complicated, low-cost mass production is difficult, and the recording area is narrowed to reduce the recording capacity.

Further, in the method of sealing the end portion after cutting, the process is complicated, low-cost mass production is difficult, and it is difficult to improve the dimensional accuracy of the shape.

Further, the method of sealing the end portion by melting the thermoplastic resin provided in advance at the time of laser cutting is simple in process and can be mass-produced at low cost. There is a drawback that it is difficult to select the thermoplastic resin due to the mutual relationship with the inorganic / organic optical recording medium, the adhesive or the substrate resin, and the sealing effect.

The present invention has been made in order to solve the above drawbacks of the prior art, and has a size more than the original size of an optical information recording medium having at least an optical information recording layer between a transparent substrate and a supporting substrate. In a method for manufacturing an optical information recording medium by cutting a laminated plate having a large work size, an object thereof is to provide a method for satisfactorily sealing the cut end and protecting the optical information recording layer by a simple method. To do.

[0025]

[Means for Solving the Problems]

○ Means for Solving the Problem of the First Invention of the Present Invention That is, the first invention of the present invention is a laminate in which a transparent substrate, an optical recording layer, a hot-melt adhesive layer, a support substrate, etc. are sequentially laminated. In the method for manufacturing an optical information recording medium by cutting a body, the laminated body is cut by a laser beam, and the circumference of the cut portion immediately after cutting by the laser beam is changed to the thickness direction while being melted by the heat of cutting. The method for producing an optical information recording medium is characterized in that

Further, in the present invention, the temperature around the cut portion is lower than the melting point of the hot melt adhesive and higher than the Vicat softening temperature in a direction substantially perpendicular to the laminated surface from the direction of the press. Is preferably performed.

In the present invention, as the hot melt adhesive, any conventionally known hot melt adhesive can be used. For example, vinyl acetate, acrylic ester, vinyl chloride, ethylene, acrylic. Examples thereof include polymers and copolymers of vinyl monomers such as acids and acrylamides, polyamides, polyesters, and polyurethane-based thermoplastic resins as base polymers.

The substrate, the optical recording layer, and the protective member in the present invention may be those commonly used without any particular limitation.

Means for Solving the Problem of the Second Invention of the Present Invention That is, the second invention of the present invention is an optical information recording medium having at least an optical information recording layer between a transparent substrate and a supporting substrate. In the method for manufacturing an optical information recording medium by cutting a laminated plate having a work size larger than the original size, the laminated plate is cut by a large-diameter beam laser to produce an optical information recording medium of the original size and a residual material. A slit is formed between the slits, a curing shrinkable resin is injected into the slit, the resin is subjected to a curing shrinkage treatment, and then the curing shrinkable resin portion is cut by a small-diameter beam laser to seal the cut end. It is a method of manufacturing a characteristic optical information recording medium.

The present invention will be described in detail below.

FIG. 6 is a process chart showing an example of a method for manufacturing the optical information recording medium of the present invention. In the figure, 101 is a transparent substrate, 102 is an optical information recording layer, 103 is an adhesive layer, 10
4 is a support substrate, 105 is a large-diameter beam laser, 106
Is a dispenser, 107 is a curing shrinkable resin, 108 is a curing source, and 109 is a small-diameter beam laser.

According to the method of manufacturing an optical information recording medium of the present invention, a transparent substrate 101, an optical information recording layer 102, an adhesive layer 103, a supporting substrate 104 and the like are laminated in this order, and the size of the optical information recording medium is smaller than the original size. Large work size laminated plate 123
Is cut using the large-diameter beam laser 105 to form a slit 121 between the original size optical information recording medium and the residual material 124 (see FIG. 6A). The slit 1
21. From the dispenser 106 to the curing shrinkable resin 107
Is injected (see FIG. 6B). Then, the curing source 108
From the above, energy such as heat, ultraviolet rays, and electron beams is supplied to cure and shrink the curing shrinkable resin 107 (see FIG. 6C). Next, a method for obtaining an optical information recording medium with the optical information recording layer protected by cutting the curing shrinkable resin portion with a small-diameter beam laser 109 and sealing the cut end portion (FIG. 6).
(See (d) and (e)).

In the present invention, the transparent substrate 101 is preferably one that has less inconvenience in optical recording and reproduction, and is preferably a material having good moldability when forming uneven pregrooves.

For example, acrylic resin, polycarbonate resin, polyester resin, vinyl resin, polyimide resin, polyacetal resin, polyolefin resin, polyamide resin, cellulose derivative and the like can be used.

The optical information recording layer 102 is not particularly limited and a wide range can be used. For example, in the case of a low melting point metal material, Te, Te-Cu, TeO, C is used.
u-Sn, CuN, or the like can be used, and organic dye-based materials include polymethine-based, virium-based, cyanine-based,
A naphthoquinone type, a triphenylmethane type, etc. can be used. Further, the film forming method is not particularly limited and may be a conventionally used method. For example, a vacuum film forming method such as vapor deposition or sputtering can be used for a low melting point metal-based material, and gravure printing for an organic dye-based material. A method or a spin coating method can be used.

As the adhesive layer 103, the transparent substrate 101,
The material is selected depending on the material of the supporting substrate 104 and the compatibility with the optical information recording layer 102, but an ultraviolet curing type or a hot melt type can be generally used.

As the supporting substrate 104, the transparent substrate 101
After lamination with the above materials, the optical information recording medium may warp due to thermal contraction or expansion due to moisture absorption. Therefore, it is preferable to use the same material as the transparent substrate 101.

In addition to the above, a protective layer, a reflective layer, a recording auxiliary layer and the like can be used in the optical information recording medium of the present invention.

As the large beam laser 105, a laser beam having a smooth cut surface of the laminated body and capable of cutting without generation of burrs or discoloration is preferable. For example, a CO ₂ laser can be used.

As the small-aperture beam laser 109, a laser beam that can be satisfactorily cut like the large-aperture beam laser 105 is preferable. Further, it is preferable that the same laser beam is used for both the large-diameter and small-diameter beam lasers in terms of both equipment and running costs.

As the dispenser 106, a commercially available device can be used. However, regarding the diameter of the dispenser, the large diameter beam laser 10
It is preferable that the width is equal to or smaller than the slit width formed in No. 5, and the curing shrinkable resin to be injected into the portions other than the slit does not adhere.

As the curing shrinkable resin 107, it is necessary to consider the adhesiveness with the transparent substrate 101 and the like, the workability at the time of injection with a dispenser, and the curing speed and curing source. Therefore, for example, epoxy-based, acrylic-based,
A silicon-based ultraviolet curable resin can be used.
Although various thermosetting resins can be used, generally, the ultraviolet curing resin has a faster curing speed and is simpler in terms of equipment.

As the curing source 108, it is preferable to use ultraviolet rays although it depends on the resin curing type as described above.

FIG. 12 is an explanatory view showing a method of continuously performing the method of manufacturing the optical information recording medium of FIG. In the figure, 116 is the position of the replacement stage, 117 is the position of the positioning stage, 118 is the position of the large diameter cutting stage, 119 is the position of the resin injection stage, 120 is the position of the curing stage, and 121 is the small diameter. The position of the cutting stage, and 122 is the cutting shape moving stage.

In FIG. 12, at the position 116 of the replacement stage, the optical information recording medium after the cutting is completed (see FIG. 6).
(See (e)) and the residual material, and after moving this to the next step, the uncut laminated plate 120 is placed. Next, the stage moves to the positioning position 117, and X, Y, and θ positioning is performed. Next, the stage has a large-diameter cutting position 11
8 and is irradiated with a large-diameter beam laser (Fig. 6).
(See (a)). At this time, the cutting shape moving stage 12
2 moves in the x and y directions according to the cutting shape. Next, the resin is moved to the resin injection position 119, and the resin is injected by the resin injection dispenser (see FIG. 6B). Also at this time, the stage 122 moves in the x and y directions according to the cutting shape. Next, the resin moves to the curing position 20 and is irradiated with ultraviolet rays to cure the resin (see FIG. 6C). Next, it moves to the small-diameter cutting position 121 and is irradiated with the small-diameter beam laser (see FIG. 6D). At this time, the cutting shape moving stage 122 moves in the x and y directions according to the cutting shape. Further, there are six stages on the cutting shape moving stage 122 at all times, and the stages are sequentially moving. Therefore, the cutting shape moving stage 122 always moves in the x and y directions according to the cutting shape.

[0046]

EXAMPLES The present invention will be described more specifically below with reference to examples. Example of the first invention of the present invention Example 1 An optical card having the structure shown in FIG. 5 was manufactured as an optical information recording medium.

The transparent substrate 20 is made of a cast acrylic resin plate having a thickness of 0.4 mm, and an uneven pattern is formed on this substrate by compression in accordance with a predetermined preformat.

An optical recording layer 21 was provided in the recording area of the transparent substrate. The recording medium has the following structural formula [I]

[0049]

[Outer 1] The polymethine dye represented by is dissolved in diacetone alcohol and coated on a substrate with a roll coater or a spinner, and then the solvent diacetone alcohol is volatilized to obtain a uniform optical recording layer having a film thickness of 1000 ± 100Å.
1 was formed.

The transparent substrate 20 coated with the optical recording layer is laminated on the supporting substrate 23 via a hot melt adhesive.

A 0.35 mm thick casting acrylic resin plate was used as the supporting substrate, and an EVA hot-melt type adhesive having a layer thickness of 50 μm was used as the adhesive.

The optical information recording medium of the work size laminated in this way was cut by a CO ₂ gas laser cutting machine.
It was cut into a card size of 6 × 54 mm.

The EVA adhesive used in this example had a melting point of 101 to 107 ° C. and a Vicat softening temperature of 70 ° C. It was found that after laser cutting, the Vicat softening temperature can be maintained around the cut portion for about 1 second.

The cutting and pressing method will be described below with reference to FIG.
Will be specifically described.

FIG. 1 is a schematic view showing a main part of a laser cutting machine according to the present invention. The head of the laser beam 13 used for cutting is of a fixed type, the movable stage 12 on which the workpiece of the optical information recording medium 11 of the work size is placed moves in a plane, and the incident laser beam is irradiated vertically to the workpiece. , Cutting into a desired shape. Further, since the laser beam is also applied to the movable stage 12, a groove having a size slightly larger than the beam diameter is provided on the table in accordance with the cutting shape, and the pressing pressure is 2 kg / cm using the pressing device 15 described above.
² , 0.2 seconds after laser light irradiation (2 cm from the irradiation part)
When pressing was performed at a distant point), the adhesion of the outer peripheral portion was remarkably improved.

Example 2 A work size optical information recording medium was prepared in the same manner as in Example 1. The cutting machine was modified as shown in FIGS. 2 and 3 to cut into a card size of 86 mm × 54 mm.

A stage groove 17 similar to that of the first embodiment is provided at the laser beam irradiation position on the movable stage 12,
In this embodiment, the width of the groove is 10 mm, and the laser light passes through the center of the groove. Next, the press roller 16 is embedded in the stage groove 12 so that the upper end of the press roller 16 becomes the same as the height of the movable stage 12,
Further, a pair of press rollers 16 are provided on the press roller.
A was prepared so that the cut portion of the optical information recording medium of the work size could be pressed by a pair of upper and lower rollers.

Further, a laser light absorbing heat absorbing material 18 is provided on the bottom of the stage groove 17. An optical information recording medium having a work size, which is an object to be cut, was placed on the movable stage, and the position was aligned with a cutting mark provided on the medium. Positioning was performed by a roller on a movable stage, and adsorption and fixing was performed at a matching point.

The movable stage was moved while irradiating the laser beam, and the outer shape was cut into a card size by "drawing with a single stroke" to obtain the above optical card medium. 2.8 for cutting one round
It took seconds. As shown in FIG. 1, the pressing machine has a ball-point pen-shaped tip, and the ball at the tip can freely rotate through a bearing. The balls are made of heat resistant rubber, and the pressing is hydraulic. The press machine can rotate around the laser beam, and is controlled and rotated by a program so that the laser beam is always followed on the medium.

Four sets of such rollers were prepared so that each side of the card could be pressed as shown in FIG.

After irradiation with laser light using the above apparatus,
When each side was pressed with a roller after a delay of 2 seconds, the adhesion of the outer peripheral portion was remarkably improved.

Example of the Second Invention of the Present Invention The present invention will be specifically described with reference to the following examples.

Example 3 An optical information recording medium was manufactured based on the process chart shown in FIG. In the figure, 111 is an uncut work (laminate),
Reference numeral 112 is a work fixing stage, 113 is a work fixing suction, and 114 is a slit formed between the optical information recording medium and the residual material.

In the above structure, since the workpiece fixing stage 112 fixes both the optical information recording medium portion and the remaining material portion, the entire circumference of the optical information recording medium portion is cut by the large-diameter beam laser 105, The slit 114 can be formed. At this time, the slit width is preferably 2 to 3 mm, although it depends on the properties of the cured injection resin. Therefore, the diameter of the injection dispenser is also preferably 2 to 3 mm or less. Further, the diameter of the small-diameter beam laser is also preferably about 1/3 of the large diameter.

10 and FIG. 10 using a large-diameter beam laser having a diameter of 3 mm (slit width 3 mm), a dispenser diameter of 2 mm, a curing shrinkable resin (made by DENKA, Hardlock OP-2050), and a small-diameter beam laser having a diameter of 1 mm. As a result of manufacturing the optical information recording medium with the manufacturing apparatus No. 12, an optical information recording medium having the sealing resin width of 1 mm and the end portions completely sealed was obtained.

Example 4 An optical information recording medium was manufactured based on the process chart shown in FIG. In the figure, reference numeral 115 denotes an uncut portion formed by the large-diameter laser.

In FIG. 11, the workpiece fixing stage 1
Since 12 only adsorbs and fixes the remaining material portion, the uncut portion 1
15 (about 1 mm width) is required. However, the uncut portion 115 is a portion where the optical information recording layer 102 does not exist. Further, the position 12 of the small-diameter cutting stage of FIG.
In No. 1, the optical information recording medium is dropped and collected at the center of the workpiece fixing stage 112 after cutting with the small-diameter beam laser.

Therefore, a large-diameter beam laser with a diameter of 4 mm (slit width 4 mm), a dispenser diameter of 2 mm,
Curable shrinkable resin (Nogawa Chemical, UV-210),
An optical information recording medium was manufactured by the manufacturing apparatus shown in FIGS. 10 and 12 using a small-diameter beam laser having a diameter of 2 mm. As a result, the sealing resin width at the end was 1 mm. Furthermore, although there were four unsealed portions of about 1 mm, there was no effect on the recording layer after the durability test.

[0069]

【The invention's effect】

Effect of the first invention of the present invention As described above, the first invention of the present invention is, immediately after laser cutting the laminated body via the hot melt adhesive,
By pressing the periphery of the cut portion of the laminate while the cut portion is in a heat-melted state, (1) adhesion is improved (2) there is no need to heat-laminate again, and the process can be simplified. is there.

Effect of the Second Invention of the Present Invention As described above, the curable shrinkable resin is injected into the slit formed by the large-diameter beam laser of the second invention of the present invention, and after curing, a small The following effects can be obtained by the method of manufacturing the optical information recording medium in which the cut end portion is sealed by cutting the cured shrinkable resin portion again with the aperture beam laser. (1) The sealing step can be performed simultaneously with the cutting step,
The process is simplified, the cost is reduced, and mass production is possible. (2) After cutting, there is no need to perform additional work for sealing the end portion, and the cutting with a small-diameter beam laser gives the final shape, so accuracy is improved. (3) The stacking process and configuration can be simplified, and various recording materials can be supported. (4) The recording area can be used as wide as possible.

[Brief description of drawings]

FIG. 1 is a schematic view of a laser cutting machine having a pressing mechanism used in the present invention.

FIG. 2 is an explanatory diagram of a laser cutting machine having a pressing mechanism used in Example 2 of the present invention.

FIG. 3 is a partial explanatory diagram of FIG.

FIG. 4 is an explanatory view seen from above a movable stage of a laser cutting machine having a pressing mechanism used in a second embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an example of an optical card used in the present invention.

FIG. 6 is a process chart showing an example of a method for manufacturing an optical information recording medium of the present invention.

FIG. 7 is an end cross-sectional view of a conventional optical information recording medium.

FIG. 8 is a sectional view of an end portion of a conventional optical information recording medium.

FIG. 9 is an end cross-sectional view of a conventional optical information recording medium.

FIG. 10 is a process drawing showing the manufacturing method of the optical information recording medium of Example 3.

FIG. 11 is a process drawing showing the method of manufacturing the optical information recording medium of Example 4.

FIG. 12 is an explanatory diagram showing a method of continuously performing the manufacturing method of the optical information recording medium of FIG.

[Explanation of symbols]

 11 Optical Information Recording Medium 12 Movable Movable Stage 13 Laser Light 14 Laser Cutting Section 15 Press 16 Press Roller 17 Stage Groove 18 Laser Light Absorbing Endothermic Material 19 Surface Protection Layer 20 Preformatted Substrate 21 Optical Recording Layer 22 Hot Melt Adhesive 23 Support Substrate 24 Preformat Pattern 101 Transparent Substrate 102 Optical Information Recording Layer 103 Adhesive Layer 104 Support Substrate 105 Large Diameter Beam Laser 106 Dispenser 107 Curing Shrinkable Resin 108 Curing Source 109 Small Diameter Beam Laser 110 Sealant 111 Uncut Work 112 Workpiece fixing stage 113 Workpiece fixing suction 114 Slit 115 Uncut portion 116 Replacement position 117 Positioning position 118 Large diameter cutting position 119 Resin injection position 120 Curing position 1 1 small bore cutting position 122 the cutting shape moving stage 123 laminate 124 remainder

Claims (3)

[Claims] 1. A method for producing an optical information recording medium by cutting a laminated body in which a transparent substrate, an optical recording layer, a hot melt adhesive layer, a supporting substrate and the like are laminated in order, and cutting the laminated body by laser light. And a method for manufacturing an optical information recording medium, characterized in that the periphery of the cut portion immediately after being cut by laser light is pressed in the thickness direction while being in a molten state by the heat of cutting. 2. The method for producing an optical information recording medium according to claim 1, wherein the pressing is performed in a range in which the temperature around the cut portion is lower than the melting point of the hot melt adhesive and higher than the Vicat softening temperature. 3. A method for manufacturing an optical information recording medium by cutting a laminate having a work size larger than the original size of the optical information recording medium, which has at least the optical information recording layer between a transparent substrate and a supporting substrate. The laminated plate is cut by a large-diameter beam laser to form a slit between the original size optical information recording medium and the residual material, and a curing shrinkable resin is injected into the slit to cure and shrink the resin. Then, the method for producing an optical information recording medium, characterized in that the cured shrinkable resin portion is cut by a small-diameter beam laser to seal the cut end portion.