JPH048485Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Technical field of the invention] This invention is based on photopolymer (radiation curing paint)
The present invention relates to an optical recording disk manufacturing device that prevents the stamper from floating during disk peeling and improves the stamper life.

[Technical background of the invention]

Conventionally, in order to manufacture an optical recording disk (hereinafter referred to as a disk) using a photopolymer, the steps shown in FIG.
There is a method shown in FIG. 3e.

In FIG. 3a, 1 is a substrate, 2 is a photopolymer, 3 is a stamper, and 4 is a center boss that moves up and down.

First, as shown in FIG. 3a, a fixed amount of photopolymer 2 is discharged onto a stamper 3 in a circular shape. Next, as shown in FIG. 3a, the substrate 1 is attached to the center boss 4.

Thereafter, the center boss 4 is lowered and brought into contact with the photopolymer 2 on the stamper 3, as shown in FIG. 3b. In this state, there are bubbles in the photopolymer 2, and the photopolymer 2 is not spread over the entire circumference of the stamper 3.

Next, as shown in FIG. 3b, the entire circumference of the circular substrate 1 is fixed with a ring 5 for holding the outer circumference.

Next, as shown in FIG. 3c, the center boss 4 is raised. Since the outer periphery of the substrate 1 is fixed by a ring 5 for holding the outer periphery, as shown in FIG.
It transforms into an umbrella shape. As the center boss 4 rises, the photopolymer 2 spreads toward the outer circumference.

At this time, the bubbles in the photopolymer 2 behave differently depending on their size. Large objects larger than about 0.5 mm disappear as the photopolymer 2 spreads, and smaller objects gather on the inner circumference side of the ring-shaped photopolymer 2.

In this state, when air is slightly fed from the inner circumference in the direction of arrow A1 and pressurized, the innermost circumference of the photopolymer 2 is vibrated, and the air bubbles in the photopolymer 2 disappear.

In this state, when the pressurization is stopped and the pressure is sequentially reduced in the direction of arrow A2 as shown in Fig. 3d, the gap between the stamper 3 and the substrate 1 is released from the outer periphery due to the differential pressure with the atmospheric pressure. The transfer progresses toward the inner circumferential side while the photopolymer 2 is interposed therebetween.

Considering the strength of the substrate 1, internal strain, etc., if you stop depressurizing at a certain level and then lower the sensor boss 4 in the center, the transfer will move toward the inner circumference, just as if the inside was depressurized. It goes on in sequence. Here, the photopolymer 2 discharged in a fixed amount
is interposed between the substrate 1 and the stamper 3,
It is consumed, reaches the innermost part of the signal surface, and stamper 3
It is completely consumed and disappears before it reaches the innermost circumference.

Further, the center boss 4 continues to descend, and when the entire circumference of the substrate 1 is on the same plane, the center boss 4 stops descending (FIG. 3e). The outer circumference presser ring is removed while the reduced pressure is maintained, and the photopolymer 2 is cured by irradiating it with light such as ultraviolet rays.

After the photopolymer 2 is cured, the center boss 4 is raised and the disk is peeled off from the stamper 3.

[Problems with background technology]

The stamper 3 is adhered to the base with an adhesive, double-sided tape, or the like. During peeling, the center boss 4 is lifted and mechanical force is applied to peel it off, so as the number of transferred sheets increases, the innermost peripheral part of the Suntaper 3 gradually deforms and lifts up from the base, and as the transfer continues, Eventually, air bubbles entered the inner periphery, making transfer impossible.

Therefore, it was necessary to further firmly fix the innermost peripheral portion of the stamper 3 to the base using an epoxy adhesive or the like.

[Purpose of invention]

This invention was made to solve the above-mentioned conventional drawbacks, and aims to provide an optical recording disk manufacturing apparatus that can prevent deformation of the stamper and improve the stamper life.

[Summary of the idea]

The optical recording disk manufacturing device of this invention has a metal inner ring with a polished surface inserted into the innermost portion of the stamper when attaching the stamper to the optical recording disk manufacturing device using radiation-curable paint. .

[Example of idea]

Embodiments of the optical recording disk manufacturing apparatus of this invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the configuration of one embodiment. In this Figure 1, 11 is the center boss, 1
2 is a stamper, 13 is a base, and 14 is a metal inner ring, which is fixed with screws 15.

Next, the operation will be explained with reference to FIG. 2. In the transfer process, the transfer progresses sequentially, and after the photopolymer curing process, the center boss 11 is raised,
Peel off the disk 16.

As shown in FIG. 2, the disk 16 is peeled off from the stamper 12 from its innermost circumference, but due to the action of the inner circumferential ring 14, there is a force against the stamper 12 that tries to separate the stamper 12 from the base 13. is hardly added.

[Effect of idea]

As described above, according to the optical recording disk manufacturing apparatus of this invention, since the polished metal inner ring that matches the innermost circumference of the stamper is fitted, attachment of the stamper to the base is simplified. be done.

Further, since almost no external force is applied to the pasted stamper, deformation of the stamper can be prevented and the life of the stamper can be improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of an embodiment of the optical recording disk manufacturing apparatus of this invention, FIG. 2 is a diagram for explaining the operation of the same optical recording disk manufacturing apparatus, and FIG. 3 a
3 to 3e are process explanatory diagrams for explaining a conventional method of manufacturing an optical recording disk. 11...Centa boss, 12...Stamper, 13
... Base, 14 ... Inner ring, 15 ... Fixing screw.

Claims (1)

[Scope of utility model registration request] An apparatus for manufacturing an optical recording disk, characterized in that an inner circumferential ring made of metal with a polished surface is inserted into the innermost circumference of the stamper when attaching a stamper in the production of optical recording disks using radiation-curable paint.