Physical information hiding structure based on structural unit size difference and preparation method thereof

A structural unit and information hiding technology, applied in the field of information hiding, can solve the problems of small hidden information capacity and low security, and achieve the effects of high privacy and security, high information capacity, and large hidden information capacity

Active Publication Date: 2020-11-17
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of small hidden information capacity and low security described in the above-mentioned prior art, the present invention provides a physical information hiding structure based on the size difference of structural units, and the physical information hiding structure provided has a large hidden information capacity, High security and broad application prospects

Method used

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  • Physical information hiding structure based on structural unit size difference and preparation method thereof
  • Physical information hiding structure based on structural unit size difference and preparation method thereof
  • Physical information hiding structure based on structural unit size difference and preparation method thereof

Examples

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Embodiment 1

[0053] This embodiment provides a physical information hiding structure based on the size difference of structural units, which includes a substrate and a metal reflective layer stacked from bottom to top, and several structural units are arranged on the metal reflective layer. Such as figure 1 As shown, the structural unit includes a dielectric layer disposed on the metal reflective layer and a semi-continuous film of metal particles covering the upper surface of the dielectric layer; as figure 1 As shown, each structural unit is provided with a hole penetrating through the dielectric layer and the semi-continuous film of metal particles along the direction perpendicular to the metal reflective layer. The pore diameter of a hole is defined as the characteristic size of the structural unit to which the hole belongs. The shapes of any two structural units are the same, and in this embodiment, the radial section of the hole is a circle.

[0054] The substrate may be a silicon ...

Embodiment 2

[0066] This embodiment provides the preparation method of the physical information hiding structure based on the size difference of the structural units of the embodiment 1, including the following steps:

[0067] S1. Clean the substrate: clean the silicon wafer, use acetone to 2 Submerge the silicon wafer, place the whole in an ultrasonic cleaning machine and ultrasonically clean it for 5 minutes, then replace the acetone with isopropanol and then ultrasonically clean it for 5 minutes, then replace the isopropanol with water and ultrasonically clean it for 5 minutes, and finally clean the silicon wafer Take it out, and dry its surface with a nitrogen gun.

[0068] S2. Preparing the metal reflective layer: that is, evaporating an aluminum film, and evaporating an aluminum film with a thickness of 100 nm on the cleaned silicon wafer with thermal evaporation equipment.

[0069] S3. Spin-coating electron beam glue: Spin-coat a layer of ZEP electron glue with a thickness of about...

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Abstract

The invention discloses a physical information hiding structure based on structural unit size difference and a preparation method thereof, the physical information hiding structure comprises a substrate and a metal reflection layer which are stacked from bottom to top, and the metal reflection layer is provided with a plurality of structural units; wherein each structural unit comprises a dielectric layer arranged on the metal reflecting layer and a metal particle semi-continuous film covering the upper surface of the dielectric layer; wherein the structural unit comprises a hidden informationunit and an adjacent unit, the absolute value of the difference between the characteristic sizes of the hidden information unit and the adjacent unit is 0-20nm, and the absolute value of the difference between the characteristic sizes is not 0. Under a common light source, the hidden information units and the adjacent units of the physical information hiding structure show similar colors, and higher secrecy and safety are achieved; moreover, the feature size of the structural unit is less than 400nm, so that the spatial information capacity is very high, the hidden information capacity is large, and the application prospect is wide.

Description

technical field [0001] The present invention relates to the technical field of information hiding, and more specifically, to a physical information hiding structure based on size differences of structural units and a preparation method thereof. Background technique [0002] Physical information hiding technology refers to the technology that uses physical methods to hide information, including invisible ink technology and microdot technology (microdot), etc. Add hidden anti-counterfeiting information to improve security, and add hidden property information to auto parts to prevent vehicle theft. [0003] However, the existing physical information hiding technology hides small information capacity and has low security when used for private information hiding. It is necessary to develop a physical information hiding structure with large hidden information capacity and high security. Contents of the invention [0004] In order to overcome the defects of small hidden informat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F3/02
CPCG09F3/0294G09F3/0291G09F2003/0257G09F2003/0213
Inventor 薛建材周张凯
Owner SUN YAT SEN UNIV
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