Ink-free laser color printing method based on phase change material

A technology of color printing and phase change materials, applied in the direction of temperature recording method, etc., can solve the problems of complex structural design and complex film structure, etc., and achieve the effect of low cost, rich colors, and colorful printing

Active Publication Date: 2019-12-31
SUZHOU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, researchers have proposed to use the interference between multilayer films and the crystallization of phase change films to achieve different color image printing [AIP Adv.7, 125024(2017); Adv.Mater.28, 4720-4726(2016); Sci .Rep.6 39206(2016)], but rich and diverse colors cannot be obtained on the same thin film structure, and the thin film structure is relatively complex; and Zhu et al. proposed a resonance laser printing technology to realize color images on dielectric metamaterials [Sci. Adv.3, e1602487(2017)], but it is necessary to prepare a periodic nanostructure substrate material in advance, and the structure design is complex

Method used

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  • Ink-free laser color printing method based on phase change material
  • Ink-free laser color printing method based on phase change material
  • Ink-free laser color printing method based on phase change material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This embodiment provides an ink-free laser color printing method based on phase change materials, the steps of which include:

[0033] 1) Coating a GeTe film 2 with a thickness of 10 nm on the quartz glass 1 by magnetron sputtering;

[0034] 2) Continue to deposit a layer of 20nm thick ZnS-SiO on the GeTe film 2 2 Film 3, to obtain a coating sample;

[0035] 3) A laser printing system is used to print the above coating samples in color, the wavelength of the laser beam 4 used is 405nm; the numerical aperture of the lens 5 is 0.45; the writing speed is 1m / s.

[0036] Schematic diagram of laser color printing such as figure 1 As shown, in this embodiment, a GeTe film is used as the phase change layer with a thickness of 10 nm, which is plated on the upper surface of quartz glass and on the lower surface of the dielectric film.

[0037] When the focused laser beam spot 6 is radiated onto the coated sample, the sample absorbs the laser energy and is heated, and then the ...

Embodiment 2～4

[0039] The printing steps of Examples 2-4 are the same as those of Example 1, and the parameters and printing parameters of the coating samples are shown in the table below.

[0040]

[0041]

[0042] figure 2 and image 3 It shows that Ge 2 Sb 2 Te 5 Changes of surface microstructure and optical constants of phase change thin film samples. It can be seen from the figure that under the action of laser, Ge 2 Sb 2 Te 5 Various microstructures including bulges appeared on the surface of the phase change film sample, and the optical constants also changed.

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Abstract

The invention discloses an ink-free laser color printing method based on a phase change material. The method comprises the following steps that S1, a phase change film is plated on a substrate, wherein the phase change film can generate various micro-structures under the action of a laser and has different optical constants; S2, a dielectric film which is transparent in a visible light wave band is deposited on the phase change film, and a coated sample is obtained, wherein the dielectric film has constant optical constants at minus 1000 DEG C; and S3, color image printing is carried out on the coated sample by using a laser printing system, the energy of a focused light spot on the phase change film is changed by adjusting the laser power density, so that the micro-structures and the optical constants of the phase change film is adjusted and controlled, and a color printing sample is obtained. The ink-free laser color printing method based on the phase change material has the advantages of no ink printing, environmental protection and no pollution, color images with different colors can be obtained and colorful.

Description

technical field [0001] The invention relates to the technical field of color printing, in particular to an ink-free laser color printing method based on phase change materials. Background technique [0002] Color printing is an indispensable technology in daily life and work, such as in color photos and color drawings. However, the current color printing is based on inkjet technology, that is, inks of different colors are required to be added to the printing equipment before printing, and color inks are not only expensive, but also harmful to the human body and the environment. In addition, traditional color printing is slow and inefficient. [0003] Therefore, other novel color printing technologies have been proposed. Recently, researchers have proposed to use the interference between multilayer films and the crystallization of phase change films to achieve different color image printing [AIP Adv.7, 125024(2017); Adv.Mater.28, 4720-4726(2016); Sci .Rep.6 39206(2016)], b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/26
CPCB41M5/26
Inventor 魏涛魏劲松刘波
Owner SUZHOU UNIV OF SCI & TECH
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