Write once read many (WORM) compact disc based on copper nitride film and manufacture method thereof

Abstract

The invention relates to a WORM compact disc based on copper nitride film and a manufacture method of the WORM compact disc. The compact disc mainly includes four layers, i.e. a substrate, a recording layer, an absorption layer and a protection layer, wherein the substrate as the first layer of the disc servers as the carrier of other parts of the compact disc and also is the physical case of the entire disc; the recording layer as the second layer of the disc is used for recording signals during burning, and a copper nitride film prepared by magnetron sputtering method serves as a disposable optical storage medium, which can form signals of 0 and 1 based on the reflectivity change while reading signals with different lengths due to the difference in reflectivity before and after burning, thereby to read information; the absorption layer as the third layer of the disc is used for absorbing excessive IR rays penetrating the recording layer; and the protection layer as the fourth layer of the disc is used for protecting the absorption layer and the recording layer in the disc to prevent data corruption.

Description

technical field [0001] The invention belongs to the technical field of optical storage, and is a write-once optical disc based on a copper nitride film. The copper nitride film is used as the recording layer of the write-once optical disc. This material can be decomposed under the action of a laser to cause optical The nature changes, so as to achieve the purpose of information storage. Background technique [0002] Optical storage is affected by the medium on the surface of the optical storage. The most common optical storage is optical discs such as CDs and DVDs. , "1" digital signal becomes optical storage. The laser beam is irradiated onto the medium after being focused by the optical path system and the objective lens, and the medium is ablated with small pits by the laser. The two states of ablated and non-ablated media correspond to two different binary data. These property changes of the memory cells are identified, ie, the stored data is read out. [0003] Wheth...

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Problems solved by technology

However, the disadvantage of CD-ROMs is that organic dyes often have certain toxicity, and when processing and handling organic dyes, they will inevitably cause harm to the human body and pollute the environment.

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