JPS5888845A - Production of coated information recording board - Google Patents

Abstract

PURPOSE:To decrease the transcribing frequencies and to obtain a recording board faithful to the original board, by forming a conductor layer on the surface of the original board to which the information is recorded unevenly, exfoliating the conductor layer from the original board, and forming a dielectric layer on the surface of the conductor layer after adhering the conductor layer on the recording board. CONSTITUTION:For production of a coated capacity conversion type information recording board for a video or audio device, a silver thin film 4 is formed by reducing and educing the silver on a glass base board 1 and a photoresist 2. Then an Ni plated layer 5 is formed, and then the layer 5 is exfoliated to obtain a master 7 to which a recessed and projected form 6 is transcribed. The surface of the form 6 is treated with a K2Cr2O7 solution to promote the exfoliation, and an Ni film 20 is plated on the surface of the form 6. Then the film 20 is exfoliated, and the rear side 22 of the film 20 having a recessed and projected form 21 formed on the surface is polished and smoothed to obtain a conductor layer 23. The layer 23 is adhered to a recording substrate (bakelite, etc.) 24 by means of an ultraviolet ray hardening adhesive 25. Finally a dielectric layer 26 of polystyrene, etc. is coated over the layer 23 by a plasma polymerizing process. Thus a recording board 27 is obtained. In such a way, a reproduction faithful to the original information is possible with a considerable recuction of the transcribing frequencies compared with the conventional case.

Description

DETAILED DESCRIPTION OF THE INVENTION ■Technical field to which the invention pertains This recording covers nine areas where signals such as video and audio are recorded! 10 Regarding the manufacturing method of the capacity conversion seal information recorder.

■Conventional contact! East, coated IIO capacitance conversion lid information record Brass record manufacturing case % OZ table 11 mK uneven spring shape with information recorded on it, prepare a spear, and based on this disk, create the first master disk. Based on this master, we obtained the second master, Mother.
A third master stamper is obtained based on this mother. And they were manufacturing this stamper recorder.

Spin coat the resist (2) and record the details.
The result, the photoresist (2), is carved on the laser beam (Yosho 7# Regis) + 2), and the photoresist (2) is divided into 9 parts exposed to the laser beam (Yosho 7#) and the non-exposed parts (divided, Information Shio 1 It is recorded in a concave and convex shape (3).

(Figure 1(a)) Next, the glass substrate (1) and the photoresist (2)
A steel thin @(4) is formed by precipitating i elements of chains on top.

In this way, conductivity is increased on the glass substrate (1), and nickel is plated to a predetermined thickness to form a metal layer (5).

(Figure 1 (b) Glass substrate (1) and metal 1t5) are peeled off. Peeling is.

This is done at the interface between the silver thin film (4) and the 7-photoresist (2) as well as the glass substrate (1). As a result, the uneven shape (3
) is transferred to obtain a mask (7) having an uneven shape (6).

Form the Tsumamihishi metal racket (8). 1g of this metal +8
) is formed by electroplating nickel to a predetermined thickness.

(Figure 1c)) Peel off the metal 11+8) using the mask (7). When the metal 111 (8) is peeled off, the surface of the metal 111 (8) reproduces an uneven pattern (9) similar to the uneven pattern (3) initially provided on the glass substrate (1). Due to the process up to this point,
You can obtain the second master, the mother member. (1st
Figure (e)) The surface of mother α is oxidized to promote peeling.

Thereafter, a metal layer aυ is electroplated. For example, nickel is used as the metal 11 holes υ, as in the case of Imajyu. (
(FIG. 1(f)) The metal 11Qυ is peeled off from the mother plate, the concavo-convex pattern (9) is transferred, and chrome plating is applied to the nine surfaces to form a surface metal layer. In this way, the star stamper 04 having the uneven shape I
After obtaining this Stanno ((14), record board 0
9 is heat compression molded. As for the material of record board a9, vinyl chloride resin etc. are used like normal records. is formed (first
Figure (h)) Record board a! A conductor 1111f9 is formed on the surface of 9.

The conductor 111 (I) is formed by, for example, vapor-depositing aluminum, slatting, etc. (Fig. 1 (I)
) After forming the conductor -αl, a dielectric 4 is subsequently formed on its surface.
form tln. For example, polystyrene is selected as the dielectric material -qη. Through the above process, the information becomes uneven U
A covered type capacitance converting type information recording disk (I) is manufactured. (Fig. 11 (j)) ■Disadvantages of the conventional technology As mentioned above, the conventional covered type capacitance converting type information recording disk (I) is manufactured. The manufacturing method for discs is complex with many steps, and the number of transfers is large.
The surface and the concave-convex shape (3) provided on the glass base (1) cannot be said to be truly the same, leading to a decrease in the quality. Therefore, in order to maintain the recording characteristics at a certain level, a simple manufacturing method that requires fewer transfers is desired.

(1) Purpose of the Invention An object of the present invention is to provide a simple method for manufacturing a capacitance conversion type information recording motherboard of a covered type that suppresses the number of transfers.

■Structure of the Invention In order to achieve the above-mentioned objects, in the present invention, a master is created using, for example, nickel in the same manner as the conventional manufacturing method,
A metal layer such as nickel is formed on the surface of the mask onto which the uneven pattern has been transferred. and.

This metal layer is peeled off from the mask and bonded to another substrate using the metal layer itself as a conductive layer. Thereafter, a dielectric layer is formed on the surface of the conductive layer to complete the recording disc.

①Example The manufacturing method of the present invention will be explained in detail below with reference to FIG. In addition, Figure 2 (a), (bl, and (C)) are reprints of No. 113ili (1), (b) a (C). Identical parts are given the same numbers and are referred to as Explanation of FIG. 2 fa), fb), and (C) will be omitted.

After obtaining the mask (7) in the same manner as before (Fig. 1 (
c)) A peel-promoting treatment is applied to the surface on which the irregularities (6) are provided. The peeling promotion treatment is performed by immersing the surface of mass j (7) in a potassium dichromate solution (5 times 1 it). Nickel plating is performed after the peel promotion treatment. Nickel plating is done in a Watts bath (sulfuric acid)
g/l - Nickel chloride 45 g/l, boric acid 40 g/j
) The surface of the mask (7) is immersed in 9H4.0 temperature 52°C1 Deno 9■ and current density If4.3A/at. The result of 111% nickel plating is 0.3111m thick nickel! [(7) is formed. (
Figure 1 (d)) Next, apply nickel Vs (a) to the mask (7).
) peels off on the surface. The peeled nine nickel pattern (2) has the concave cedar (6) of the mask (7) transferred thereto, and a concavo-convex shape (21) is formed on the surface.

After completing the peeling, the back surface 4 is polished using, for example, a No. 1000 sand vapor to make the back surface smooth. By polishing, a nickel film with a uniform thickness is obtained, and this is used as conductor 1 (Fig. 1). to),
Glue to the record base (goods). For example, a Bakelite plate is used as the recording substrate. The method of adhering the conductor 11 is, for example, by spin-coding an anaerobic ultraviolet curable adhesive onto the surface of the recording substrate R24Q and adhering the conductor layer. Adhesion (When adhering, be careful not to introduce air bubbles between the conductive material and the recording substrate.) After adhesion and irradiation with ultraviolet rays, the adhesive solidifies and becomes conductive. The body layer (to) and the recording base I24 become one. (
The last step is to form the dielectric PII. As an example of forming the dielectric layer on the conductor M, it is possible to use good polymerization.

Polystyrene is selected as the dielectric material, and a polystyrene coating is formed on the surface of the p conductor #10 as the dielectric material 4. The thickness of the dielectric material 111 is set to 5OOXK. Through 0 or more steps, coating IIO
Capacity conversion information Kiginban (goods) can be obtained. (Figure 1 (g
)) To complete the recording disc (5), a center hole is punched out as a post-process to prevent eccentricity, and the overall shape of the recording disc (5) has an outer diameter of 260φ. The size of the punched center hole is 38φ and the thickness is 2.1 mm.

■Effects of the Invention Here, we will compare the performance of a recording disk molded by the manufacturing method of the present invention and a recording disk obtained by a conventional manufacturing method (Yosho, the effects of the present invention will be clarified).

The base body of a conventional record disc (record disc 119) which is molded by heat compression
) K is a circle using PVC vinegar pico-polymer, and the conductor 11111 is formed by sputtering aluminum (with a thickness of 5,500 mm).Furthermore, the dielectric layer 1η is 1 recording disk of the present invention (5) It was made of polystyrene with a thickness of 5ooA in the same manner as above.

The conventional conductor 1α is aluminum, and the conductor of the present invention) 1+21 is nickel.
There is almost no difference, and there is no problem when comparing the performance.

Both the coated recording disks obtained by the conventional manufacturing method and the present invention were subjected to a reproducing machine, and the obtained CN ratio (ratio of carrier wave to noise) and output are shown in the table below.

As is clear from the table, the recording disk according to the present invention is superior to the conventional one in terms of both the CN ratio and the output, which indicate the information reproduction performance. This is Kt! compared to the conventional manufacturing method. Sickle board (9 pieces that can be reproduced).

As described above, the manufacturing method of the present invention can provide a nine-cover type recording disk with simplified steps and excellent playback performance compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a process diagram showing a conventional manufacturing method, and FIG. 2 is a process diagram showing a manufacturing method of a covered information recording disc of the present invention. 16)...Uneven shape, (7)...Mask, ■...4
g body 11%@...recording base, ^...dielectric +4.・
Jun... Information record board.

Claims (1)

[Scope of Claims] A step of forming a conductive layer that transfers the unevenness onto the surface of a master disc on which information is recorded in the form of unevenness. A step of separating the conductive layer from the master; and a step of adhering the peeled good conductive layer onto the solid base. A method for producing and using a coated information disc, comprising the step of forming a conductor layer Km of the conductor layer deposited on the uppermost substrate.