JPH03219442A - Formation of stamper master disk consisting of 2p resin and glass - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a 2P resin used for manufacturing optical recording medium substrates.
The present invention relates to a method for creating a standby master in which a glass stamper master is formed by molding an original mold.

[Conventional technology]

The fourth method of peeling off the conventional 2P resin-glass stamper master
As shown in the figure. Conventionally, the original mold or glass master disk was tapered, and a peeling jig such as a wedge-shaped jig was driven into a portion of the taper to pry it off.

(Problem to be solved by the invention) In this case, the 2P resin protruding from between the original mold and the glass master disk has hardened, and if you try to insert the wedge-shaped jig, you will scrape the resin and waste unnecessary waste. In addition, there is a possibility that the hardened 2P resin surface on the glass master disk may be damaged.

Furthermore, if the 2P resin-glass stamper master is large enough for multiple stamping, a peeling jig such as a wedge-shaped jig requires a large force and is difficult to peel off.

Therefore, it is conceivable to create a stepped part on the outer periphery of the glass master disk and use an L-shaped crowbar jig to hook it like a lever to perform the peeling, but it is difficult to process the step part on the glass master disk. It becomes expensive.

In addition, the method of attaching a larger auxiliary material to the glass master to create a step is cumbersome considering the gluing work, etc.
After all, glass master discs are expensive and unsuitable.

On the other hand, when attaching supplementary material to the original mold side, it is necessary to make the glass master larger than the original mold, and as a result, the protruding 22 resin at the edge of the original mold is hardened and formed on the glass master as it is. It becomes a protrusion on the glass master. This is not preferable for subsequent Ni electroforming, etc., and will adversely affect the characteristics of the optical recording medium.

The present invention solves the problem that protrusions caused by the 2P resin protruding from the ends of the original mold remain on the glass master in a method of bonding a supplementary material to an original mold to form a step and then peeling the 2P resin-glass stamper master. This provides a method for creating .

[Means to solve the problem]

The present invention is a method for creating a 2P resin-glass stamper master by making a mold from an original mold, in which an auxiliary material (4) larger than the original mold (3) having an uneven surface is bonded to the back surface of the original mold (3), and the uneven surface is 2P resin on the surface (2)
Glass master (1) larger than the original mold (3)
), then place the 2P resin adsorption removal members (5, 6) adjacent to the outer peripheral end surface (8) of the original mold and the glass master disk (1), and UV cure the 2P resin (2). After that, remove the members (5, 6) and attach the 2P resin (2).
This is a method for creating a 2P resin-glass stamper master, which is characterized by peeling the 2P resin-glass stamper master from an original mold (3) together with a glass master (1).According to the present invention, a standby master without surface protrusions etc. can be easily created. be able to.

Furthermore, in the above configuration, by performing the peeling with an L-shaped crowbar jig, the 2P resin can be easily peeled off without chipping or damaging the surface.

In the present invention, the 2P resin adsorption/removal member (hereinafter referred to as removal member) refers to the 2P resin that absorbs the 2P resin protruding from the original mold or attaches it to the surface, and after the resin hardens, retains the resin contained or attached. It is a removable member, and its shape is a concave gap (step) formed by the edge of the glass master, the outer peripheral edge of the original mold, and the edge of the supplementary material.
It has a shape that allows it to be inserted into the original mold and to be adjacent to the end of the glass master and the outer peripheral end of the original mold. The removal member preferably has a thickness smaller than the gap between the steps,
Removal of the member can facilitate sushi. Furthermore, after curing, the protruding 2P resin must be peeled off from the glass master or the original mold and preferentially adhere to the member.

Examples of the removal member that can be used in the present invention include porous ceramic materials, metal plate materials such as aluminum and stainless steel with multiple narrow grooves of about 0.1 to 1.0 mm, hard plastic materials, etc. be able to. Regarding the surface properties of the removal member, it is preferable that the surface is not smooth, such as porous, because it is easier to retain the protruding 2P resin. Further, in order to ensure that the cured 2P resin preferentially adheres to the removal member side, the surface of the member is preferably treated with a coupling agent. The present invention will be described below with reference to the drawings.

FIG. 1 is a schematic cross-sectional view showing one manufacturing step that clearly shows the characteristics of the manufacturing method of the present invention. That is, on the back side of the original mold 3 made of a glass substrate or the like having an uneven surface, an auxiliary material 4 made of a larger glass substrate or the like is pasted with a rubber-based or epoxy-based adhesive.
P resin (for example, Nippon Kayaku CYK-011) 2 is coated, and a glass master 1 larger than the original mold 3 is coated on top of it.
(The mounting surface is preferably treated with a coupling agent.) Next, after placing the removal member 5 adjacent to the outer peripheral end surface 8 of the original mold 3 and the glass master 1,
This shows the P resin 2 cured by UV. FIG. 2 is a partially enlarged view of the removal member 5 and its vicinity. It is desirable that the member 5 is thinner than the interval between the stepped portions, so that the member 5 can be easily removed by squeezing the member 5. Note that after removing the removal member 5, it can be easily removed by using an L-shaped crowbar jig.
Resin can be peeled off. FIG. 3 is a schematic cross-sectional view showing another embodiment of the removal member according to the present invention. This removal member 6 has an L-shaped crowbar shape, and after the 2P resin is cured, the 2P resin can be peeled off and the member 6 can be removed at the same time.

〔Example〕

The present invention will be explained below with reference to Examples.

Example 1 FIG. 1 is a schematic cross-sectional view of the area where the uneven surface of the original mold 3 was molded with 2P resin 2 provided on the glass master 1, and the 2P resin was cured. Original type 3 consists of 300 glass substrates with a thickness of 5 tons, 34
A glass substrate with a thickness of 5 tons is used as the auxiliary material 4 and is bonded with a rubber-based or epoxy-based adhesive. The glass master disk 1 consists of a glass substrate with a thickness of 320 lots.

The glass master disk 1 is treated with a coupling agent using MDS etc. 2
P resin is attached. The 2P resin is dispensed onto the glass master and the original mold, and the original mold and the glass master are overlapped to spread the 2P resin.

At this time, by placing the removal member 5 on the outer periphery of the original mold in advance, the protruding 2P resin was absorbed and fixed to the member 5. For the member 5, a porous ceramic material or the like, or a metal plate material such as stainless steel having a plurality of narrow grooves of about 0.1 to 1.0 mm was used. These removal members are surface-treated with a coupling agent such as Nihon Unica A-1120 for the purpose of removing the cured 2P resin from the glass master or original mold.

While maintaining the state shown in FIG. 1, the 2P resin was cured by U■ heat irradiation from the glass master side. The member 5 was hardened and adhered to the outer periphery of the glass master 1, and was moved like a lever in the direction of peeling indicated by the arrow to peel off the 2P resin on the outer periphery of the glass master. After removing the member 5, an L-shaped metal fitting such as a crowbar was inserted into the stepped portion instead, and the glass master 1 was separated from the original mold 3.

The 2P resin on the obtained 2P resin-glass stamper master molded the uneven surface of the original mold neatly, and no protrusions or the like were observed at the edges.

Example 2 FIG. 3 shows a cross-sectional view of another embodiment of the removal member 6 after UV curing.

When the removal member 6 is made of stainless steel or the like, the part that contacts the glass master is treated with a coupling agent, and bent into an L-shape, this member also serves as a peeling jig and requires less force. I was able to separate the glass master and the original mold.

As in Example 1, the 2P resin on the obtained 2P resin-glass stamper master had no protrusions or the like at the edges.

(Effect of the invention) As described above, by providing a stepped portion with a concave portion in the original mold and arranging the removing member in the stepped portion, the 2P resin protruding from between the glass master and the original mold is absorbed by the removing member. By curing, the protruding portion of the 2P resin can be easily removed after curing, and the glass master and original mold can be easily separated by using a crowbar jig or by making the member L-shaped crowbar. It is possible,
High quality 2P resin with no unnecessary protrusions on the 2P resin.
It becomes possible to easily create a glass stamper master.

Further, according to the present invention, it is possible to create a plurality of glass master disks from one original mold, and as a result, it is possible to improve economical efficiency.

0

[Brief explanation of drawings]

Figure 1 is a schematic sectional view explaining the manufacturing method of the present invention, Figure 2
The figures are a partially enlarged schematic sectional view showing the 2P resin adsorption and removal member in Fig. 1, FIG. 3 is a partially enlarged schematic sectional view showing another aspect of the 2P resin adsorption and removal member according to the present invention, and FIG. The figure is a partially enlarged schematic cross-sectional view illustrating a conventional manufacturing method. 1... Glass master disc 2... 2P resin 3... Original mold 4... Auxiliary material 5. 6. 2P resin adsorption removal member 7... Wedge-shaped peeling jig 8... Original mold outer periphery End face part

Claims (1)

[Claims] 1. In a method for producing a 2P resin-glass stamper master by molding it from an original mold, a supplementary material (4) larger than the original mold (3) is pasted on the back side of the original mold (3) having an uneven surface. Then, a glass master (1) larger than the original mold (3) is mounted on the uneven surface via the 2P resin (2), and then adjacent to the outer peripheral end surface (8) of the original mold and the glass master (1). 2P resin adsorption removal member (5
, 6) and after UV curing the 2P resin (2),
A method for producing a 2P resin-glass stamper master, which comprises removing the members (5, 6) and peeling the 2P resin (2) together with the glass master (1) from the original mold (3). 2. The manufacturing method according to claim 1, wherein the peeling of the 2P resin from the original mold is performed by using an L-shaped crowbar jig to pry open the glass master and the original mold. 3. The manufacturing method according to claim 2, wherein the crowbar type jig is the 2P resin adsorption removal member (6) according to claim 1. 4. 2 that can be used in the production method according to claim 1
P resin adsorption removal member (5, 6).