JPH0432048A - Device for producing optical information recording carrier - Google Patents

Abstract

PURPOSE:To reduce eccentricity by providing correcting mechanisms which move a stamper to correct the deviation between the center of a stamper and that of an optical information recording carrier producing device. CONSTITUTION:Correcting mechanisms 16 to 18 are provided which move a stamper 1 to correct the deviation between the center of the stamper 1 and that of the optical information recording carrier producing device. When three micrometers 16 are used to set the stamper 1 while observing the boundary between the outer peripheral part track pattern or pit pattern of the stamper 1 and a mirror part by a microscope 17 so that deflection of this boundary is eliminated, the center of the track pattern or the pit pattern and that of a glass substrate or a plastic substrate are aligned without eccentricity. Thus, an optical information recording carrier is formed with <=10mum eccentricity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for manufacturing an optical information recording carrier used for optical information recording carriers typified by laser discs, disk memories, and the like.

[Prior Art] Generally, digital audio discs and information recording discs are provided with pits (signals) and pre-groups (hereinafter referred to as guide grooves called tracks) on the surface of the disc.
As a method for mass-producing these disk substrates (hereinafter referred to as optical information recording carriers), ultraviolet curable resin, which is still in a fluid state, is applied to a stamper on which information patterns such as bits and tracks are formed in reverse. and press-bonding a transparent substrate to the ultraviolet curable resin, and curing the ultraviolet curable resin by irradiating ultraviolet rays through the transparent substrate,
A method is used to produce an optical information recording carrier on which an information pattern is transferred.

The contents are JP-A-53-116105, JP-A-54-
130902, JP-A-54-138406, JP-A-55
-4793 etc.

[Problems with the prior art] In the optical information recording carrier manufactured by the above-described conventional optical information recording carrier manufacturing method, if the center of the optical information recording carrier and the center of the track pattern or pit pattern are misaligned, the optical information will be lost. When the optical information record carrier is rotated with reference to the hole in the center of the record carrier, the track pattern or the pit pattern is shaken in the radial direction of the optical information record carrier. The runout of this track pattern or pit pattern is 50μ
If m exceeds, the drive servo system of the optical head will not be able to follow it, making it impossible to normally reproduce, record, and erase information.

Therefore, it is necessary that the deviation between the center of the glass substrate and the center of the track pattern or pit pattern be 50 μm or less. For this reason, when transferring the track pattern or pit pattern of the stubber onto an optical information recording carrier, it is necessary to align the center of the glass substrate or plastic substrate with the center of the track pattern or pit pattern of the stubber with as high precision as possible. There is.

A conventional manufacturing apparatus used in this method will be explained with reference to FIG. The center of the guide ring 3 is fitted to the center of the stand bar table 2. Next, the stand bar table 2 on which the guide ring 3 is set and the stand bar 1 on which the track pattern is formed are fitted together. The stand bar table 2 on which the stand bar 1 is set is fitted to the support member 4 of an optical information recording carrier manufacturing apparatus. Here, the support member 4 on which the stand bar table 2 is set and the center pin 5 must be fitted as accurately as possible during the manufacturing stage of the optical information recording carrier manufacturing apparatus.

Next, the amount of deviation between the center of the glass substrate 10 and the center of the stanbar 〇 track pattern is determined mainly by: (1) the accuracy of the inner diameter of the stanbar 1 on which the track pattern is formed, (2) the eccentricity of the track pattern itself, (2) The parts that make up the optical information recording carrier manufacturing equipment, namely the stand bar.
It is determined by the processing accuracy of the table 2, guide ring 3, support member 4 of the stand bar table, center bin 5, etc., and the fitting accuracy of each of these parts.

Therefore, in order to align the centers of the track patterns of the glass substrate 10 and the stanbar with high accuracy within 10 .mu.m or less, it is necessary to process each component with an extremely high precision of 2 to 3 .mu.m. However, with current machining technology, it is extremely difficult to process with such ultra-high precision. Therefore, there was a problem in that it was difficult to manufacture an inexpensive optical information recording carrier.

[Problems to be Solved by the Invention] The present invention improves the conventional molding machine using a mechanical fitting method, and provides a manufacturing apparatus for stably manufacturing optical information recording carriers with less eccentricity. It is intended to provide.

[Means for Solving the Problems] The device of the present invention for achieving the above object has a method in which a desired track pattern or pit pattern formed on a stand bar placed on a stand bar table is positioned by a center pin. In a manufacturing device that manufactures an optical information recording carrier by transferring it onto a disk-shaped glass substrate or plastic substrate, a stanbar on which a track pattern or a pit pattern is formed is moved to align the center of the stanbar with the optical information recording carrier. The present invention is characterized in that it includes a correction mechanism that corrects the deviation from the center position of the manufacturing device.

The above correction mechanism optically reads the pattern of the stubber in which the track pattern or pits are formed, and based on this read data, moves the stubber table on which the stubber is set to remove the stubber from the glass substrate or plastic. It is desirable to provide a correction means for correcting the amount of deviation between the center of the center pin to which the board is attached and the center of the stand bar, and reducing the amount of eccentricity.

[Example] An example of the present invention will be described below based on FIGS. 2 and 3.

Note that FIG. 2 is a sectional view of the main parts of the device of the present invention, and FIG. 3 is a plan view of the same device. Further, the same members as those in the conventional device shown in FIG. 1 are designated by the same numbers.

The illustrated device includes a stamper table 12 that can be moved in the X and Y directions as a means for correcting the amount of deviation in the center position of the stamper 1, a micrometer 16 that moves the stamper table 12, and a track pattern or pit pattern that is observed. A microscope 17 and a monitor 18 are provided for this purpose.

A stamp bar 1 on which a track pattern or a pit pattern is formed is set on a guide ring 13 and a stamper table 12. When setting the stamper on the stamper table, the setting accuracy may be 50 .mu.m or more since the stamper is adjusted after being set. The stamper table 12 on which the stamper 1 is set is set on the support member 14 of an optical information recording carrier manufacturing apparatus.

Standby chair 12 placed on support member 14
While observing the boundary between the outer circumferential track pattern or pit pattern of the upper stanbar and a portion of the mirror using a microscope 17 and a monitor 18, use the three micrometers 16, that is, rotate the knobs thereof, to measure the spindle guide groove 1.
The spindle 16- in 2- is pushed out, and the tip of the spindle presses and adjusts the spindle abutting part provided on the lower surface of the stand bar table to set it so that there is no deviation between the track pattern or pit pattern and the partial boundary of the mirror.

At this time, the stamper table 12 rotates concentrically with the center pin 15, so when there is no wobbling, the center of the center pin is aligned with the center of the track pattern or pit pattern, and there is almost no eccentricity. This means that it is set to . That is, the center of the track pattern or pit pattern and the center of the glass substrate or plastic substrate are set without eccentricity. By performing molding in this state, molding with an eccentricity of 10 μm or less became possible.

[Effects of the Invention] As explained above, according to the optical information recording carrier manufacturing apparatus of the present invention, the center position of the standby and the center position of the glass substrate or plastic substrate are always aligned with high accuracy within 10 μm. Therefore, there is an effect that an optical information recording carrier having a small amount of eccentricity and excellent mechanical properties can be easily obtained.

Further, in this manufacturing apparatus, there is no need to make the processing precision required for each part higher than necessary, and it is possible to manufacture an inexpensive optical information recording carrier manufacturing apparatus.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the main part of the conventional device, FIG. 2 is a sectional view of the main part of the device of the present invention, and FIG. 3 is a plan view of the same device. 1 is a stand bar, 2 is a stand bar table, 3 is a guide ring, 4 is a support member, 5 is a center pin, 10 is a glass substrate, 12 is a stand bar table, 13 is a guide ring, 15 is a center pin, 16 is a micro metal , 17 is a microscope, and 18 is a monitor.

Claims (2)

[Claims] (1) Manufacturing in which an optical information recording carrier is manufactured by transferring a desired track pattern or pit pattern formed on a stamper placed on a stamper table onto a disc-shaped glass substrate or plastic substrate positioned by a center pin. The apparatus is characterized in that it is equipped with a correction mechanism that moves a stamper on which a track pattern or a pit pattern is formed to correct a deviation between the center of the stamper and the center position of the optical information recording carrier manufacturing apparatus. Information recording carrier manufacturing equipment. (2) The correction mechanism optically reads the pattern of the stamper on which the track pattern or pit pattern is formed, and based on this read data, moves the stamper table on which the stamper is set to substrate the glass substrate or plastic substrate. 2. The apparatus according to claim 1, further comprising correction means for correcting the amount of deviation between the center of the center pin to which the stamper is attached and the center of the stamper, thereby reducing the amount of eccentricity.