JPH0283873A - Manufacture of disk for recording information and jig used for it - Google Patents

Abstract

PURPOSE:To position the center of a disk substrate and the center of a hub in a short time and with a good accuracy by using 2 jigs having a taper part with a high processing accuracy when the hub is fitted at the disk substrate. CONSTITUTION:Adhesives 12 are developed on the surface of a first hub 11. Next, a first jig 13 is vertically put down to the hub 11, a taper part a14 is abutted to the inner hole of the hub 11 and the center of the hub 11 and the center of the jig 13 are aligned. Next, a disk substrate 15 is put down onto the hub 11. Next, a second jig 16 is put down round the jig 13, the substrate 15 is micro-moved, the inner hole of the substrate 15 is abutted to a taper part 11 provided at the tip of the jig 16 and the center of the hub 11 and the center of the substrate 15 are aligned. Next, adhesives 19 are developed at the cavity between the hub 11 and the substrate 15, and on the surface of the hub 11 and the substrate 15, a second hub 20 is bonded.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a method for attaching a hub to an information recording disk and a jig used therefor.

The purpose is to align the center of the disk board with the center of the hub in a short time and with high precision.

a step of spreading a first adhesive on the surface of the first hub; lowering a first cylindrical jig vertically onto the first hub;
A step of aligning the center of the first hub with the center of the first jig by applying the tapered part provided at the tip of the first jig to the circular hole of the first hub; The process of lowering the disk board.

A cylindrical second jig having a through hole in the center for passing the first jig is lowered around the first jig,
a step of aligning the center of the first hub with the center of the disk substrate by slightly moving the disk substrate and bringing the circular hole of the disk substrate into contact with the tapered part provided at the tip of the second jig; Spread a second adhesive in the gap with the disk substrate,
The method includes a step of bonding a second hub to the surfaces of the first hub and the disk substrate.

[Industrial application field]

The present invention relates to a method for manufacturing an information recording disc and a jig used therein.

Currently, computer systems use disk devices such as magnetic disks, optical disks, and magneto-optical disks as large-capacity, high-speed information recording media.

A hub (bubbling) is attached to the disk device to reinforce the circular hole. The present invention particularly relates to a method of attaching this hub to a disk substrate, and a jig used therefor.

[Conventional technology]

The conventional technology will be explained using an optical disc among information recording discs as an example.

Since optical disks read and write signals along groups (laser light guide grooves) with a pitch of 1.6 μm, the eccentricity of the groups must be reduced to 30 μm or less.

In general, an optical disk is produced by forming three recording films on substrates forming a group using an injection molding method or a 2P transfer method, bonding them together with the recording film surfaces facing inside, and then holding five substrates. Attach the hub so that the eccentricity of the group is minimized.

As a method of attaching the hub to the disk board.

Conventionally, the hub and the disk substrate were placed on a rotating stage equipped with a microscope, and the center of the disk substrate was visually aligned with the center of the hub.

[Problem to be solved by the invention]

By conventional visual inspection. When aligning the center of the disk substrate and the center of the hub, there is a problem in that it takes time to keep the eccentricity of the optical disk group within a predetermined value, resulting in poor productivity.

The present invention solves this problem and makes it possible to align the center of the disk substrate and the center of the hub in a short time and with high precision. The purpose of the present invention is to provide a method for manufacturing an information recording disc and a jig used therein.

[Means to solve the problem]

In order to achieve the above object, two methods of manufacturing an information recording disc according to the present invention include a step of spreading a first adhesive on the surface of a first hub, and a step of applying a first jig to the first hub. Lower it vertically and place the tapered part at the tip of the first jig against the circular hole in the first hub.

A step of aligning the center of the first hub with the center of the tenth jig, a step of lowering the disk substrate onto the first hub, a step of lowering the second jig around the first jig, and a step of lowering the disk substrate onto the first hub. A step of slightly moving the substrate and aligning the center of the first hub with the center of the disk substrate by aligning the center of the first hub with the center of the disk substrate by applying the circular hole of the disk substrate to the tapered part provided at the tip of the second jig; The method is structured to include the steps of spreading a second adhesive in the gap between the substrate and the second hub and bonding the second hub to the surfaces of the first hub and the disk substrate.

In addition, the jig used for manufacturing the information recording disk according to the present invention includes a cylindrical first jig having a tapered part with high processing precision at its tip, and a first jig having a tapered part with high processing precision at its tip. and a cylindrical second jig having a through hole in the center for passing the first jig.

[Effect]

Since the group is transferred onto the disk substrate by pressing it against a tapered stamper with high processing precision, the center of the largest circle that is in contact with the head of the disk substrate becomes the center of the group.

The jig according to the present invention consists of two jigs each having a tapered part with high machining accuracy at the tip.

5. In the method for manufacturing an information recording disk according to the present invention, this jig is used when attaching the hub to the disk substrate, so the center of the disk substrate and the center of the hub can be precisely aligned in a short time. be able to.

That is, in one aspect of the present invention, all operations after the transfer of the group onto the disk substrate are performed using a jig having a tapered portion with high processing accuracy at its tip. Specifically, when attaching the hub to the disk substrate, center the hub by pressing the tip of the hub against the tapered part provided at the tip of the first jig, and in this state, attach the hub to the disk substrate. Temporarily attach it with adhesive 2. Then, lower the second jig along the outside of the first jig, and place the disc substrate on the tapered part provided at the tip of the second jig. The center of the hub and the center of the disk substrate are aligned by pressing, and then the disk substrate and the hub are bonded.

In this way, in the present invention, when attaching the hub to the disk substrate, two jigs having tapered parts with high machining accuracy are used, so the center of the disk substrate and the center of the hub can be precisely aligned in a short time. It becomes possible to align well.

〔Example〕

FIGS. 1(a) and 1(b) are diagrams showing two first jigs of the present invention.

FIG. 1Ll) shows a cross section, and FIG. 1(b) shows a bottom surface.

In FIG. 1(a), the first jig 2 has a cylindrical shape and -! : A tapered portion a with high machining accuracy is provided at the tip.

FIG. 2 is a diagram showing a second jig of the present invention.

In FIG. 2, the second jig 5 has a cylindrical shape,
A tapered portion with high machining accuracy is provided at the tip, and a through hole 4 for passing the first jig 2 is provided in the center.

1 and 2 for attaching the hub to the disk substrate in the method for manufacturing an information recording disk according to the present invention.
The first jig 2 and second jig 5 shown in the figure are used.

3 to 9 are diagrams showing each manufacturing process for attaching a huff to a disk substrate in the method for manufacturing an information recording disk according to the present invention.

In FIGS. 3 to 9, 11 is a first hub.

12 is a first adhesive, 13 is a tenth jig, and 14 is a tapered part a with high processing accuracy provided at the tip of the first jig 13.
, 15 is a disk substrate, 16 is a second jig, 17 is a second
18 is a through hole provided at the center of the jig 16 to pass through the first jig 13; 18 is a tapered portion with high machining accuracy provided at the tip of the second jig 16; 19 is a through hole provided at the center of the second jig 16; 2 adhesive, 20 is the second hub.

Hereinafter, a method for attaching a hub to a disk substrate in a method for manufacturing an information recording disk according to the present invention will be explained using FIGS. 3 to 9.

(Step 1. See FIG. 3) The first adhesive is spread on the surface of the first hub 11 in a circumferential manner.

(Step 2. See Figure 4) Lower the first jig 13 vertically toward the first hub 11, gently apply the tapered part a14 to the head of the first hub 11, and Align the center of the hub 11 with the center of the first jig 13.

(Step 3. See FIG. 5) Lower the disk substrate 15 onto the first hub 11, and roughly align the disk substrate 15 and the first hub 11.

(Step 4. See Figure 6) [First jig] Do not shift the position of 3.

Penetrating the second jig 16 around the first jig 13 7L1
Using 7 as a guide, lower it gently.

Then, the center of the first hub 11 and the center of the disk substrate 15 are aligned by slightly moving the disk substrate 15 and pressing the counterfire of the disk substrate I5 against the tapered portion b18 of the second jig 16.

(Step 5. See Figure 7) While keeping the first jig 13 still, move the second jig 1
Pull out 6.

(Step 6. See Figure 8) The disk substrate 15 and the first hub 11 are bonded together.

After that, the first jig 13 is removed.

(Step 7. See FIG. 8) A second adhesive 19 is spread between the first hub 11 and the disk substrate 15.

(Step 8. See FIG. 9) The second adhesive 19 is applied to the first hub 11. Disk board 1
5. and the second hub 20 are fixed together.

Through the above steps, the attachment of the hub to the disk substrate in the method for manufacturing an information recording disk according to the second invention is completed.

〔Effect of the invention〕

In the conventional method of attaching a hub to a disk board by visual inspection, the eccentricity between the center of the disk board and the center of the hub is set to 30μ.
It took about 20 minutes to reduce the temperature to below m. In the present invention, the eccentricity between the center of the disk substrate and the center of the hub can be reduced to 30 μm or less in about 2 minutes.

According to the present invention, everything from group transfer to the final process can be manufactured based on the firing direction of the disk substrate.
Accuracy can be increased and manufacturing time can be significantly shortened.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are diagrams showing a first jig of the present invention. FIG. 2 shows a second jig of the present invention, and FIGS. 3 to 9 are diagrams showing each manufacturing process of the present invention. In Figure 1, 1: Taper part a 2: First jig In Figure 2, 3: Taper part b 4: Through hole 5: Second jig In Figures 3 to 9, 11: First hub 12: First adhesive 13: First jig 14: Taper part a 15: Disk substrate 16: Second jig 17: Through hole 18: Taper part b 19: Second adhesive 20: Second Hub (a) (b) Fig. 2

Claims (2)

[Claims] (1) Apply the first adhesive (12) to the surface of the first hub (11).
), and lowering the first jig (13) vertically onto the first hub (11), and expanding the tapered part (
14) into the inner hole of the first hub (11) to align the center of the first hub (11) with the center of the first jig (13); and a step of lowering the disk substrate (15) onto the top. Lower the second jig (16) around the first jig (13), move the disk substrate (15) slightly, and insert the inner hole of the disk substrate (15) into the tip of the second jig (16). a step of aligning the center of the first hub (11) with the center of the disk substrate (15) by applying it to the tapered portion (18) provided in the disk substrate (15); The method is characterized by the step of spreading a second adhesive (19) in the gap and bonding the second hub (20) to the surfaces of the first hub (11) and the disk substrate (15). A method for manufacturing an information recording disc. (2) A cylindrical first jig (2) with a tapered part (1) with high machining accuracy at the tip, a taper part (3) with high machining accuracy at the tip, and a first jig in the center. 1 jig (2)
A cylindrical second tube having a through hole (4) for penetrating the
A jig used for manufacturing an information recording disc, characterized in that it consists of a jig (5).