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Printing method of microform graph-text

A printing method and micro-text technology, applied in the field of printing, can solve the problems such as the inability of printing technology to be realized, and achieve the effect of solving technical problems and broad application prospects.

Active Publication Date: 2011-11-02
SHANGHAI TECHSUN ANTI COUNTERFEITING TECH HLDG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For finer micrographic printing, such as micrographics with a height of tens of microns and the thinnest line stitching in the range of several microns, none of the printing technologies mentioned above can be realized.

Method used

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  • Printing method of microform graph-text

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The preparation method of the described nickel plate 10 with the hollow micro-graphic structure 5 comprises the following steps:

[0036] (1) Coating a polymer material on the conductive substrate 1 to obtain a conductive substrate 1 with a polymer coating 2;

[0037] (2) Using micromachining technology to form a micrographic structure 3 on the polymer coating 2 to obtain a conductive substrate 1 with an island micrographic structure 2. For the micrographic structure 3, see figure 2 , wherein, the micro-text, such as "TC" in the figure, is an isolated protrusion on the conductive substrate 1, and the conductive substrate 1 in the place where there is no micro-text structure is exposed;

[0038] (3) The conductive substrate with the island micro-text structure 3 obtained in step (2) is placed in the electrolyte, and micro-electroformed nickel is carried out. In the gaps of the island micro-text structure, a nickel layer 4 is formed and electroformed. After the end, the...

Embodiment 1

[0041] (1) The substrate is made of silicon wafers. The silicon wafers are first cleaned and baked in an oven at 180°C for 4 hours to remove surface water molecules. A layer of titanium metal film with a thickness of 2um is formed on the surface of the silicon wafers by a sputtering machine. , coating a photoresist with a thickness of 40 um on the surface of the metal titanium film, and drying to obtain a conductive substrate with a photoresist coating. The photoresist is the SU-8 series produced by MicroChem Corp. of the United States.

[0042] (2) Adopt the method for mask photolithography, form micrographic structure on photoresist coating: used mask plate such as Figure 4 As shown, it is a quartz chromium plate. For the preparation method of the mask plate, you can refer to the method reported in the literature of Wang Weijun et al. Micron lines, the text line width is 8 microns. The part of the miniature characters is black, representing opacity, and the rest is white, ...

Embodiment 2

[0055] Using the same method as in Example 1, wherein, in step (3), the conductive substrate with the isolated island micro-graphic structure obtained in step (2) is placed in the electrolyte, the conductive substrate is the cathode, and nickel is the anode, and the Micro-electroforming nickel forms nickel pillars in the gaps of the isolated island micro-graphic structure, and the height of the nickel pillars is less than the thickness of the photoresist layer and is 50% of the thickness of the photoresist layer.

[0056] Electroforming conditions are as follows: pH value: 5.1; temperature: 50°C.

[0057] Cover the surface of the printing material 7 with the nickel plate 10 having the hollowed-out micro-text structure 5, and use it as a printing plate, and the printing material with micro-text can be obtained by scraping printing.

[0058]Among them, the thickness of the nickel plate with hollowed-out micrographics is 20 microns, and the thinnest seam is 8 microns.

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Abstract

The invention discloses a printing method of a microform graph-text, which comprises the following steps of: covering a nickel sheet with a hollow microform graph-text structure on the surface of a printing material, and obtaining the printing material with the microform graph-text in a printing matter such as ink-jetting or blade coating and the like; a preparation method of the nickel sheet with the hollow microform graph-text structure comprises the following steps of: (1) coating a polymer material on a conductive substrate; (2) forming the microform graph-text structure on a polymer coating by adopting a micro-machining technology; and (3) carrying out nickel micro-electroforming on the conductive substrate obtained in the step (2), forming a nickel layer the height of which is smaller than the thickness of a photoetching adhesive layer in gaps of the island microform graph-text structure, stripping the nickel layer and the conductive substrate, and washing down the polymer material to obtain the nickel sheet with the hollow microform graph-text structure. According to the printing method disclosed by the invention, a micro-machining plate-making technology and a traditional printing technology are combined; the printing method can be used for printing the microform graph-text less than 50 micrometer; and therefore, the technical difficulty of the microform graph-text printing is solved and the printing method has very wide application prospect.

Description

technical field [0001] The invention relates to printing technology, in particular to a method for printing micrographics and texts. technical background [0002] Microprinting refers to the printing of specific images and texts on the surface of materials in a microscopic manner, and the micrographics can only be reproduced clearly through a magnifying glass or a microscope. The characteristic of miniature is that "word" can be used instead of "line". A thin line segment is composed of characters when you look carefully, so the height of the characters should be reduced to within 0.2mm. In this way, microprinting has a great impact on printing technology. high demands. [0003] The current popular printing technologies mainly include flexo printing, offset printing and gravure printing, etc. Although these traditional printing technologies show their talents in macro pattern printing, they are powerless for micrographic printing. At present, the more advanced DMP-2800 ser...

Claims

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Application Information

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IPC IPC(8): B41M3/00
Inventor 徐良衡庄孝磊高芸盛志栋
Owner SHANGHAI TECHSUN ANTI COUNTERFEITING TECH HLDG
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