CN1282964C - Optical recording medium and manufacturing method thereof - Google Patents

Abstract

An optical recording medium includes an optical recording substrate, an interface layer and a hard mask layer. Wherein, the interface layer and the hard film protective layer are sequentially formed on one side of the optical recording substrate; and the interface layer is located between the optical recording substrate and the hard mask protection layer. In addition, the invention also provides a manufacturing method of the optical recording medium.

Description

Optical recording medium and manufacturing method thereof

technical field

The invention relates to an optical recording medium and a manufacturing method thereof, in particular to an optical recording medium with a hard coating layer and a manufacturing method thereof.

Background technique

In recent years, because optical recording media can store a large amount of data, are portable, and can store data for a long time, using optical recording media to store data has become an increasingly popular data storage method. Its application fields include storing images , music or large amounts of data.

Currently the most common optical recording media include CD (Compact Disc) and Digital Versatile Disc (DVD, Digital Versatile Disc). The CD is taken as an example below to illustrate its structure. Please refer to FIG. 1. In general, an optical recording medium 1 usually includes three layers of materials. The reflective layer 13 is formed of metal materials such as silver, and the third layer is a protective layer 15 formed of resin. Note that the aforementioned optical recording medium includes a recordable optical recording medium, and a recording layer (not shown) made of organic dye (Dye) is formed between the substrate 11 and the reflective layer 13 .

As mentioned above, when using a reading device, such as CD-Player, DVD-Player and other devices, to read the data stored in the optical recording medium 1, the laser light emitted by the reading device will pass through the substrate 11 and be reflected The layer 13 reflects the laser light, and then the reading device will receive the laser light reflected by the reflective layer 13, and read the data stored in the optical recording medium 1 according to the reflected laser light; wherein, the substrate 11 of the optical recording medium 1, Generally referred to as the read side. However, during the process of handling, using and storing optical recording media, collisions and frictions often occur, which will wear out the reading surface of the optical recording media, and as a result, the reading device cannot normally read the data in the optical recording media; therefore, Those skilled in the art use the spin coating method to form a hard film protective layer 17 (as shown in Figure 2) on the reading surface of the optical recording medium 2, in order to increase the surface hardness of the reading surface and improve its wear resistance ability.

However, the above-mentioned spin coating process is not easy to control, and in the process of forming the hard film protection layer 17, the interface between the substrate 11 and the hard film protection layer 17 will generate accumulation of internal stress (inter stress), so that The bonding condition is not good, and the hard coat protective layer 17 produced by the spin-coating method will have poor uniformity, which will adversely affect the subsequent mechanical properties and photoelectric properties of the optical recording medium 2. .

Therefore, effectively protecting the reading surface of the optical recording medium and avoiding adverse effects on the mechanical and optoelectronic properties of the optical recording medium is one of the important issues in the current optical recording medium manufacturing technology.

Contents of the invention

The object of the present invention is to provide an optical recording medium capable of effectively protecting the reading surface and avoiding affecting the mechanical and optoelectronic properties and its manufacturing method.

The feature of the present invention is that at least one hard film protection layer and an interface layer between the substrate and the hard film protection layer are formed on the reading surface of the optical recording medium.

Therefore, to achieve the above object, the optical recording medium according to the present invention includes an optical recording substrate, an interface layer, and a hard coating layer. In the present invention, the interface layer and the hard film protection layer are formed on one side of the optical recording substrate; and the interface layer is located between the optical recording substrate and the hard film protection layer. Wherein, the interface layer and the hard film protection layer are formed on one side of the reading surface of the optical recording medium; and the optical recording substrate includes a substrate, a reflection layer and a protection layer.

The invention provides an optical recording medium, comprising: an optical recording substrate, including a substrate and a reflective layer, the reflective layer is arranged on one side of the substrate; a hard film protection layer is formed on the substrate opposite to the reflective layer and an interface layer formed between the substrate and the hard film protection layer.

In addition, the present invention also provides a method for manufacturing an optical recording medium, which includes prefabricating an optical recording substrate, the optical recording substrate includes a substrate and a reflective layer, and the reflective layer is arranged on one side of the substrate; forming an interface layer on the other side of the layer; and forming a hard coat protective layer on one side of the interface layer. In the present invention, the interface layer is formed between the substrate and the hard film protection layer. Wherein, the interface layer and the hard film protection layer may be formed by sputtering.

As mentioned above, according to the optical recording medium and its manufacturing method of the present invention, an interface layer and a hard coat protection layer are formed on the reading surface of the optical recording medium, so the reading surface of the optical recording medium can be effectively protected by using the hard coating protection layer. Take the surface, and use the interface layer arranged between the substrate and the hard film protective layer to avoid internal stress accumulation on the joint surface and poor joint conditions, thereby eliminating adverse effects on the mechanical and optoelectronic properties of the optical recording medium; In addition, since the optical recording medium and the manufacturing method thereof according to the present invention can form the interface layer and the hard film protective layer by sputtering, the problem of poor uniformity caused by the spin coating method can be avoided, and further Improving the mechanical and optoelectronic properties of optical recording media.

In other words, since an interface layer and a hard coat protective layer are formed on the reading surface of the optical recording medium according to the optical recording medium and the manufacturing method thereof of the present invention, the reading surface of the optical recording medium can be effectively protected by the hard coating protective layer. In addition, according to the optical recording medium of the present invention and the manufacturing method thereof, the interface layer is formed between the substrate and the hard film protective layer by sputtering, so as to avoid the accumulation of internal stress on the joint surface and the situation of poor joint conditions, and avoid The problem of poor uniformity caused by the spin-coating method is used to eliminate the adverse effects on the mechanical and optoelectronic properties of the optical recording medium.

Description of drawings

FIG. 1 is a schematic diagram showing a conventional optical recording medium;

Fig. 2 is a schematic view showing another existing optical recording medium;

3 is a schematic diagram showing an optical recording medium according to a preferred embodiment of the present invention;

4 is a schematic diagram showing an optical recording medium according to another preferred embodiment of the present invention, which also has a buffer layer;

5 is a schematic view showing an optical recording medium according to another preferred embodiment of the present invention, which also has a recording layer; and

FIG. 6 is a flow chart showing the flow of a manufacturing method of an optical recording medium according to a preferred embodiment of the present invention.

Detailed ways

Hereinafter, an optical recording medium and a manufacturing method thereof according to preferred embodiments of the present invention will be described with reference to the accompanying drawings, wherein the same components will be described with the same reference symbols.

Referring to FIG. 3 , the optical recording medium 3 according to a preferred embodiment of the present invention includes a substrate 31 , a reflective layer 33 , a protective layer 35 , a hard-coat protective layer 37 and an interface layer 39 .

In this embodiment, a plurality of holes 311 are formed on one side of the substrate 31; generally speaking, those skilled in the art first make a stamper corresponding to the substrate 31, and use injection molding to match the stamper. The plate forms the substrate 31 .

The reflective layer 33 and the protective layer 35 are sequentially formed on the side of the substrate 31 having the hole 311 , as shown in the figure. In this embodiment, the reflective layer 33 may be formed of metal materials such as gold or silver, and the protective layer 35 is generally formed of resin. Note that the substrate 31, the reflective layer 33 and the protective layer 35 constitute the previously defined optical recording substrate, which can be an existing optical recording medium such as CD or DVD.

As shown in FIG. 3 , the interface layer 39 and the hard film protection layer 37 are sequentially formed on the other side of the substrate 31 having the holes 311 . In this embodiment, the interface layer 39 and the hard film protective layer 37 are formed by sputtering, and the interface layer 39 is formed between the substrate 31 and the hard film protective layer 37, which can be connected with the substrate 31 and the hard film protective layer respectively. 37. It is formed by materials with stable joints, such as epoxy resin, oxygen-containing compounds, silicon oxide, etc., so it can avoid the accumulation of internal stress on the joint surface and poor joint conditions caused by the existing spin coating method; in addition , the hard film protective layer 37 is a material that can increase surface hardness and wear resistance, such as organic compounds, thermofusible resin, epoxy resin, silicon dioxide, aluminum oxide, etc. It should be noted that because the interface layer 39 and the hard-coat protective layer 37 are formed on one side of the reading surface of the optical recording medium 3, the interface layer 39 and the hard-coat protective layer 37 must be able to allow the reading device (not shown in the figure) ) through which the laser light passes smoothly, so that the reading device can normally read the data stored in the optical recording medium 3 .

In addition, please refer to shown in Figure 4, the optical recording medium 4 according to another preferred embodiment of the present invention comprises a substrate 31, a reflective layer 33, a protective layer 35, a hard film protective layer 37, a buffer layer 38 and an interface layer 39 .

As mentioned above, some components of the optical recording medium 4 are as described above, so they will not be described again; The external force on the optical recording medium 4 and the internal stress that may occur in the optical recording medium 4; wherein, the buffer layer 38 is also formed by sputtering, and its material can be organic polymer, wax (waxe), rubber ( rubber), cerium oxide, etc.

Note that, in addition to the above-mentioned CD or DVD, the optical recording medium according to the present invention may also be a recordable optical recording medium, such as CD-R, CD-RW, DVD-R or DVD-RW; for example, as As shown in Figure 5, according to another preferred embodiment of the present invention, the optical recording medium 5 includes a substrate 31, a recording layer 32, a reflective layer 33, a protective layer 35, a hard film protective layer 37, a buffer layer 38 and an interface layer 39 . In this embodiment, the material of the recording layer 32 may also include organic substances, such as phthalocyanine, or nitrogen-containing compounds (Azo compounds), and the organic substances will be generated due to the high temperature generated by laser focusing after being irradiated by laser light. The change of structure, so that write data; In addition, recording layer 32 is positioned between substrate 31 and reflection layer 33, and its material can be to comprise metal, as Ge-Sb-Te, or Ag-In-Sb-Te, and record After being irradiated by the laser of the reading device, the metal of the layer 32 will undergo a phase change due to the high temperature generated by laser focusing, thereby achieving data writing. In addition, the optical recording medium according to the present invention may also be one layer of a DVD, DVD-R or DVD-RW having a double-layer structure.

In order to make the content of the present invention easier to understand, an example will be given below to illustrate the flow of the optical recording medium manufacturing method according to the preferred embodiment of the present invention.

Referring to FIG. 6 , the optical recording medium manufacturing method 6 according to a preferred embodiment of the present invention includes steps 601-604. First, step 601 prefabricates an optical recording substrate. In this embodiment, the optical recording substrate can be the structure of existing optical recording media such as CD, CD-R, CD-RW, DVD, DVD-R or DVD-RW, which usually has a substrate, a reflective layer and A protective layer, if it is a writeable or rewritable optical recording medium structure, a recording layer will be formed between the substrate and the reflective layer.

Next, in step 602, an interface layer is formed on one side of the optical recording substrate. As mentioned above, in this step, the interface layer is formed on one side of the optical recording substrate, and its material is a substance that can be stably bonded to the substrate. In this embodiment, the interface layer is formed by sputtering, so when the interface layer is formed, internal stress accumulation and poor bonding will not occur between the substrate and the interface layer.

Then, step 603 forms a buffer layer on the interface layer. In this embodiment, the buffer layer is formed by sputtering, so when the buffer layer is formed, no accumulation of internal stress will occur between the interface layer and the buffer layer.

Finally, as shown in step 604, a hard film protective layer is formed on the buffer layer. In this embodiment, the material of the hard film protective layer can be any existing material of the hard film protective layer; moreover, this step utilizes sputtering to form the hard film protective layer, so when forming the hard film protective layer , no accumulation of internal stress will occur between the hard coat protective layer and the buffer layer.

Note that the above step 603 can be implemented selectively, that is, it is not necessary to form a buffer layer between the interface layer and the hard-coat protection layer, but directly form the hard-coat protection layer on the interface layer.

The above description is only illustrative, not restrictive. Any equivalent modification or change without departing from the spirit and scope of the present invention shall be included in the scope of the claims.

Claims (11)

1. An optical recording medium, characterized in that it comprises: An optical recording substrate, including a substrate and a reflective layer, the reflective layer is arranged on one side of the substrate; a hard film protective layer, which is formed on the other side of the substrate relative to the reflective layer; and An interface layer is formed between the substrate and the hard film protection layer. 2. The optical recording medium of claim 1, wherein the optical recording medium comprises: A protection layer is formed on one side of the reflective layer. 3. The optical recording medium of claim 1, wherein the optical recording medium comprises: A recording layer is formed between the substrate and the reflective layer. 4. The optical recording medium as claimed in claim 1, wherein the interface layer and the hard coat protection layer are respectively formed by sputtering. 5. The optical recording medium of claim 1, comprising: A buffer layer is formed between the interface layer and the hard film protection layer to buffer or absorb the external force exerted on the optical recording medium and the internal stress generated by the optical recording medium. The buffer layer is formed by sputtering. 6. The optical recording medium according to claim 1, which is a CD or a digital laser disc. 7. A method of manufacturing an optical recording medium, characterized in that it comprises: Prefabricating an optical recording substrate, the optical recording substrate includes a substrate and a reflective layer, the reflective layer is arranged on one side of the substrate; forming an interface layer on the other side of the substrate opposite to the reflective layer; and A hard film protection layer is formed on one side of the interface layer, and the interface layer is formed between the substrate and the hard film protection layer. 8. The optical recording medium manufacturing method according to claim 7, wherein the optical recording substrate comprises: A protection layer is formed on one side of the reflective layer. 9. The optical recording medium manufacturing method as claimed in claim 8, wherein the optical recording substrate comprises: A recording layer is formed between the substrate and the reflective layer. 10 . The method for manufacturing an optical recording medium as claimed in claim 7 , wherein the interface layer and the hard coat protection layer are formed by sputtering respectively. 11 . 11. The method for manufacturing an optical recording medium as claimed in claim 7, comprising: A buffer layer is formed between the interface layer and the hard film protection layer to buffer or absorb the external force exerted on the optical recording medium and the internal stress generated by the optical recording medium. The buffer layer is formed by sputtering.

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