JPH01241045A - Stamper for production of optical disk - Google Patents

Abstract

PURPOSE:To easily obtain an optical disk for a sample in a short period of time by coating a negative resist on a metallic disk and subjecting the coating to laser beam exposing, then developing the resist and depositing a metallic film by evaporation thereon. CONSTITUTION:The negative resist 4 is coated by a spinner on the polished metallic disk 2. The resist is then subjected to the laser beam exposing, then to post baking after developing. A metallic film 6 consisting of nickel is thereafter formed by an electron beam vapor deposition method. A UV curing acrylic resin 8 is spin-coated on the metallic film 6 and further a polycarbonate resin layer 10 is pressed thereto, then UV rays are irradiated on said layer from the PC resin layer 10 side to cure the UV curing acrylic resin 8. The metallic Ni film 6 is then stripped and a reflecting film 12 consisting of aluminum, etc. is formed by vapor deposition on the UV curing acrylic resin layer 8. A protective layer 14 consisting of PC or the like to serve as a base material is formed by spin coating, etc., on said film. The optical disk is thereby formed in a short period of time.

Description

[Detailed Description of the Invention] <Industrial Application Field> When producing a stun optical disc for use in the optical disc manufacturing process, the present invention is to make a sample product and test it on an actual player to see if it will become a product. I was judging.

Conventionally, this sample was made by applying a master tape (3/, Umatic tape) to a laser beam exposure device, applying it to a glass disk coated with a positive resist, and then developing, forming a conductive film (mastering process), and plating. , revlation (injection), and reflective film formation, and then tried it on an actual player before making a final judgment. Plating to obtain a stand bar in this process takes 3 to 5 hours.

In particular, when producing optical discs such as CD-ROMs, it is necessary to quickly check whether the information on the master tape is recorded accurately and whether the information on the master tape is correctly read onto the optical disc due to the high-mix, low-volume production. I need to know.

However, as mentioned above, the actual duplication process is somewhat complicated and the plating process takes time. If you have to remanufacture the product, you may not be able to meet the customer's delivery deadline, resulting in time loss and wasted costs.

It has long been a challenge to manufacture actual optical discs at low cost and in a short time.

Means for Solving the Problems> The present invention has been made in response to the current situation as described above, and involves coating a negative resist on a metal plate, exposing it to a laser beam, developing it, and forming a metal film. The present invention provides a stamper for manufacturing optical discs which allows sample optical discs to be easily obtained in a short period of time.

<Example> The present invention will be specifically described below with reference to an example.

The structure of the present invention is to apply a negative resist on a metal plate,
A laser beam exposure device is used to expose, develop, and form a metal film, which is then used for replication (injection).
It is used in the process.

First, as shown in Fig. 1a, a negative resist 4 (manufactured by Fuji-Hunt - AYCOA
TVHR) is applied to a thickness of 0.13 μm using a spinner. The side without the negative resist must also be sufficiently polished; this side is important in the injection process to produce a replica with no irregularities.

For metal plate 2, a nickel plate is used, and after coating it is heated to 85°C.
Baking was performed for 0 minutes.

Next, laser beam exposure is performed.9 In the present invention, a laser beam exposure device for a normal mask ring can be used, but the direction of rotation must be reversed.

When developing after exposure, use a developer specifically designed for negative resists (FuJi-Hunt I!! WN
RD) I did.

After development, post baking was performed at 135° C. for 20 minutes, and then a metal film 6 of nickel was formed by 700 people by electron beam evaporation. This is to provide resistance to the resist film.

Next, as shown in rEJb, U is applied on the metal film 6 made of Ni.
A hardened acrylic resin 8 is spin-coded, and a polycarbonate (PC) resin layer 10 (thickness 1.2 +wm) is formed.
is pressed and irradiated with ultraviolet rays from the PC resin layer 10 side to harden the UV-curable acrylic resin 8.

Next, as shown in FIG.
is formed by vapor deposition, and a protective layer 14 of PC or the like serving as a base material is formed by spin cord or the like.

When actually used as a test optical disc, it may be used with the signal portion sandwiched between the metal layer 2 and the resin layer lo as shown in Figure C (or as shown in Figure C). It may be used with an aluminum reflective layer formed.

<Effects> The present invention is as described above, and it is possible to obtain an optical disk for testing, which eliminates the need for multiple plating steps, makes it possible to create an optical disk in a very short time, and reduces costs. .

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the optical disc of the present invention and its manufacturing process. 2...Metal plate 4...Resist 6...N
1 vapor deposited layer 8...υV cured resin layer 810...
Resin layer 12... Reflective layer 14... Protective coat layer (protective layer) Patent application: Toppan Printing Co., Ltd. Representative: Kazuo Suzuki

Claims (1)

[Claims] 1) A photoresist layer having irregularities corresponding to an information signal is provided on the metal disk, and a metal film layer is formed on the photoresist layer. Used for testing. Stamper for manufacturing optical discs.