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Super resolution reflecting film arrangement

A super-resolution and reflective film technology, applied in the field of optical storage, to achieve the effect of simple film structure, simple process, and low production cost

Inactive Publication Date: 2004-11-03
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to effectively improve the defects and difficulties of the above-mentioned prior art, and propose a "super-resolution reflective film structure" to realize recording points smaller than the read-out spot size in a read-only optical disc (super-resolution) record point) readout

Method used

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Embodiment Construction

[0018] The structure of the super-resolution reflective film of the present invention is as follows figure 1 As shown, a protective layer 1, a super-resolution reflective film 2 and a protective layer 3 are included. The protective layer 1 and the protective layer 3 are used to prevent the super-resolution reflective film 2 from being damaged or oxidized, and the super-resolution reflective film 2 is used to read out the super-resolution information recording point.

[0019] The protective layer 1 and the protective layer 3 in the present invention are both composed of silicon nitride with a thickness of 50-100 nm, and the super-resolution reflective film 2 is composed of antimony (Sb) or silicon (Si) or titanium (Ti) with a thickness of 5-50 nm , Take the value according to the specific situation of the implementation. The protective layer 1, the super-resolution reflective film 2 and the protective layer 3 jointly form the super-resolution reflective film structure 4, see figur...

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Abstract

The super resolution reflecting film structure for read only CD includes the first protecting layer, super resolution reflecting film and the second protecting layer, and features that the protecting layers are made of SiN and the super resolution reflecting film is made of Sb, Si or Ti. The super resolution reflecting film structure realizes the read-out of super resolution information recording dots mainly on the non-linear optical effect caused by the reversible phase change of the super resolution reflecting film material between the crystal state and the amorphous state. The super resolution reflecting film of the present invention has the advantages of obvious non-linear optical effect, quick response, high dynamic read-out S / N ratio, etc. Experiment shows that the present invention can realize read-out of super resolution information recording dots.

Description

Technical field: [0001] The invention belongs to the field of optical storage technology, and is a super-resolution reflective film structure. Background technique: [0002] The rapid development of information technology requires devices used for information storage to have ultra-high storage density and ultra-fast access speed, which requires that the size of recording points in the optical disk for information storage is getting smaller and smaller. However, as the size of recording dots decreases, the spot size required for reading the recording dots is also reduced accordingly. It is difficult to read such tiny recording dots with the existing optical system, because the size of the recording dots is smaller than that of reading. The resolution of the light spot, the signal of multiple recording points will appear in the light spot, which requires the use of a short-wavelength laser and a high numerical aperture optical head. However, due to the diffraction limit effect of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24053
Inventor 魏劲松干福熹王阳徐文东张锋周飞高秀敏
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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