Method and apparatus for adding optical disc information layer

Abstract

The invention relates to a method and a device for adding the information level of a disk, in particular to an information level used for adding a BD disk. The method comprises the following steps: a layer of coating is applied to the surface of a substrate; the substrate with a layer of coating on the surface thereof is accurately positioned on a substrate tray; the substrate tray is positioned on a mechanical drive device; the substrate is transmitted to an appointed position by the mechanical drive device; a confined space is created at the appointed position and the substrate is positioned in the confined space at the appointed position so as to ensure that the substrate is at a closed space; in the confined space, a master disk is applied to being coaxially covered on the coating of the substrate from the top; and an ultraviolet lamp is applied to irradiating under the substrate so as to solidify the coating. The device consists of a substrate drive device and an information copy device. The substrate drive device consists of a turntable, a substrate tray, a center locating head and a sealing ring; the information copy device consists of a supporting unit, a sealing cavity, a master disk base and a center locating compressed shaft sleeve. The method and the device have the advantages that the homogenization of the spacer-layer with information can be assured, the coaxality of the spacer-layer with information and the substrate can be enabled to be good and the time cycle for completing the working procedure is short.

Description

technical field [0001] The invention relates to a method and a device for adding an information layer of an optical disc, especially for adding an information layer of a BD (Blu-ray Disc) optical disc. Background technique [0002] Optical storage media has been widely used now. The market for optical discs based on plastic materials such as CD, DVD, and BD is quite large. With the continuous improvement of living standards and the emergence of more high-definition movies, people have more and more requirements for the storage capacity of optical discs. high. [0003] In the current field of optical disc technology, optical disc products have gradually developed from the initial CD to DVD with larger capacity, until now BD with high capacity. Capacity from the original CD: 700MB to single-layer DVD: 4.7GB to the current BD (single-layer) 25GB. From these figures, it can be seen that people's requirements for disc capacity are increasing. A reflective layer is first formed ...

AI Technical Summary

Problems solved by technology

[0005]The usual way to add an information layer is to coat a layer of uniform resin after sputtering a reflective layer on a single substrate, and press it with a soft template with an information groove. Then the flexible template is separated to form a spacer layer with information grooves. The advantage of this method is that the existing DVD bonding technology and devices can be used, but the disadvantage is that the utilization rate of the flexible template in this method is low. , once used, the waste is large, so this method has a long production cycle (low production capacity), high cost, low yield, and it is very difficult to form a uniform resin layer

Another method is the film method. This method is to use mature film technology to form a film layer of uniform thickness, and then press the mold on the resin film at a certain temperature to transfer the pits to form information. The main advantage of this method is that the uniformity of the film layer can be well controlled, and it can also use existing mature DVD bonding technology and equipment, But the disadvantage is that the method of forming information on the film is immature, and the yield is very low.

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