JPS5979444A - Optical memory element - Google Patents

Abstract

PURPOSE:To reduce oxidation of a memory film as small as possible by forming the layer structure of a substrate, an additionally recordable memory film, such as Te, lower Te oxide, or org. dye, and a film of an easily oxidizable substance, such as Ti, mg, Be, C, or rare earth metal. CONSTITUTION:The optical memory element is composed of a supporting base 1 made of a synthetic resin or the like, an additionally recordable memory film 2 made of Te, lower Te oxide, or org. dye, and a film 3 of an easily oxidizable substance made of Ti, Mg, Be, C, or rare earth metal. Oxygen intruding from the atm. or present in the inside of the element are consumed by the oxygen absorptivity of the film 3, thus suppressing oxidation of the memory film 2 and preventing deterioration due to oxidation.

Description

[Detailed description of the invention] Technical fields> The present invention relates to an optical storage element capable of additional recording.

<Prior art> In recent years, major publications; j1. Optical storage devices are being actively researched and developed as memory devices capable of high-density and high-speed access.

But Kouki-1, t? Many of the materials that make up the storage medium of the device have characteristics that deteriorate due to oxidation, which has hindered their practical application. The following two methods are known as methods for preventing oxidation of storage media.

One is a structure in which a base for forming a storage medium and a base for protection are bonded together via a spacer with the storage medium placed inside, and the gap between them is filled with an inert gas (air-and-switch structure).
Another method is to form a structure in which a storage medium is coated on a substrate and a protective layer typified by a polymeric material *Mi1 is formed thereon. However, even when the above two methods were used, they were powerless against oxygen mixed in during the formation of the storage medium, the formation of the protective layer, the bonding process, etc., and the device with the structure of the above two methods was completed. Even later, the storage medium was oxidized by oxygen entering from the outside air.

<Purpose> The present invention aims to solve the problems of the above-mentioned prior art by: 1.
The structure of the G element is composed of a substrate, a storage film capable of recording additional materials such as lower oxides, organic dyes, and 'ri.

It has a layered structure with a film of easily oxidizable substances such as Mg, Be, carbon, and rare earth metals, and the film of easily oxidizable substances absorbs oxygen that enters, thereby reducing oxidation of the memory film as much as possible. be.

<Example> Regarding the embodiments of the optical storage device according to the sewage invention.

Explain in detail.

Example (1) 1.1 shows a side view of Example (1) of the optical storage element according to the present invention. 1 is a support base made of glass, synthetic resin, etc.; 2 is a memory film capable of additional recording made of a material such as i'e, Te lower oxide, or organic dye; and 3 is Ti.

It is an easily oxidizable substance film made of materials such as Mg, I3e, carbon, and rare earth metals. Due to the oxygen absorption ability of the easily oxidizable material film 3, oxygen that enters from the outside air and oxygen that exists inside the device is consumed by the easily oxidizable material film 3. Therefore, oxidation of memory 1 and 2 is suppressed and deterioration due to oxidation is prevented.

Example (2) The second example (1) shows a side view of Example (2) of the optical storage element according to the present invention. 4 is a support base made of glass, synthetic resin, etc., 5 is an additional recordable memory 11 consisting of shrines 41 of 'I''e, T e lower oxides, organic dyes, etc., 6 is 510
2 is a transparent dielectric film made of SiO, 'ri02.5j3N4, etc., and 7 is an easily oxidizable substance film made of materials such as Ti, Mg, 13e, and rare earth metals. In the 4IW structure of this embodiment (2), the easily oxidizable material film 7 has the function of suppressing the oxidation of the memory film 5 by consuming the Fii9 element that enters from the outside air and the oxygen present inside the element, and the supporting base 4
The transparent dielectric film 6 also functions as a reflective film to reflect the light that has passed through the memory 11 sudden 5 and enters the memory film 5 again, and also serves as a heat insulating layer. I can do it. In the structure of Example (2), since the memory film 5 is necessarily required to be thin, if the memory film 5 is oxidized, the signal characteristics will deteriorate significantly. Therefore, in the structure of Example (2), the importance of the easily oxidizable material film 7 increases.

Effects> According to the present invention, oxidation of the memory film is significantly suppressed, so the reliability of the optical memory element is greatly improved.

[Brief explanation of drawings]

FIG. 1 is a side view of Example (1) of the optical memory element according to the present invention, and FIG. 2 is a side view of Example (21) of the optical memory element according to the present invention. In the figure, 1, 4: Supporting substrate, 2, 5: Memory film, 3゜7, easily oxidizable substance 11 times, 6: Transparent dielectric film. Agent: Patent attorney Yoshihiko Fukushi (and 2 others) Figure 1 Figure 2

Claims (1)

[Claims] 1. A substrate, a memory film capable of recording additional materials such as Te, lower Te oxides, organic dyes, etc., and Ti, Mg, Be, and carbon. An optical memory element characterized in that it has a layered structure with a film of an easily oxidizable substance such as a rare earth metal.