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Nanoparticle deposition method based on Leidenfrost phenomenon

A nanoparticle and deposition method technology, which is applied in the direction of electrical components, printed circuit manufacturing, conductive pattern formation, etc., to achieve the effects of reducing resistance, improving printing accuracy, and improving accuracy

Pending Publication Date: 2021-08-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For many engineering problems, there is no way or is not allowed to directly modify its surface, so it is necessary to propose a method to improve the precision of nanoparticle deposition patterns without modifying the surface

Method used

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  • Nanoparticle deposition method based on Leidenfrost phenomenon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: surface coating

[0033] On the horizontal substrate, the substrate is heated to 250° C., and the nanoparticle ink is copper nanoparticle ink (a colloidal solution formed of copper nanoparticles and ethylene glycol). Adjust the printing speed to 5m / s and the dot pitch to 0.15mm to deposit nanoparticles on the entire surface to form a layer of copper nanoparticles with a thickness of 1 micron. The substrate and copper nanoparticles are sintered at 600° C. for 30 minutes to form a layer of copper film.

Embodiment 2

[0034] Example 2: Printed Conductive Circuits

[0035] On the ceramic substrate, the substrate is heated to 300°C, and the nanoparticle ink is silver nanoparticle ink (diethylene glycol colloidal solution of silver nanoparticles), and the silver nanoparticle ink is deposited on the ceramic substrate at 300°C. The printing speed is 5m / s, the dot pitch is 0.15mm, and a conductive line with a thickness of 1 micron is formed. After the silver nanoparticle ink is deposited, it is sintered at 300°C for 10min.

[0036] Repeat the printing operation, increase the thickness of the deposition pattern by multi-layer printing, control the deposition thickness, and obtain a Leidenfrost deposition pattern with controllable thickness.

[0037] figure 1 Deposit conductive lines on a ceramic substrate at 300°C for silver nanoparticle ink, adjust the printing speed to 5m / s, the dot pitch to 0.15mm, and the number of printing layers to be 1-10 layers from bottom to top, and the color of the dep...

Embodiment 3

[0038] Example 3: Inkjet Printed Thin Film Thermocouple

[0039] On the ceramic horizontal substrate, the substrate is heated to 250°C, the nanoparticle ink is copper nanoparticle ethylene glycol solution and constantan nanoparticle solution, the copper nanoparticle ethylene glycol solution is used as the positive electrode material, and the constantan nanoparticle solution is used as the negative electrode The material is deposited on the surface of the ceramic horizontal substrate heated to 250°C, the deposition pattern is two connected lines, the printing speed is adjusted to 5m / s, the dot pitch is 0.15mm, and the thickness of 1 micron is formed by sintering at 800°C for 1h. thin film thermocouple.

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Abstract

The invention provides a nanoparticle deposition method based on a Leidenfrost phenomenon, and belongs to the technical field of nanoparticle deposition. The method comprises the following steps: 1, a substrate is heated to a temperature above the Leidenfrost temperature; 2, the printing speed and the dot spacing of ink-jet printing equipment are set, a deposition pattern is input, and a layer of deposition pattern is obtained on the surface of the substrate through ink-jet printing of nano particle ink; and 3, the operation in the second step is repeated, the thickness of the deposited pattern is increased through multi-layer printing, and high-resolution control over the thickness of the ink-jet printing deposited pattern is achieved. According to the method, the precision of the ink-jet printing deposited pattern can be improved through Leidenfrost printing, and the deposition thickness of the nanoparticle liquid drops is controlled through multi-layer printing.

Description

technical field [0001] The invention belongs to the technical field of nano particle deposition, in particular to a nano particle deposition method based on the Leidenfrost phenomenon. Background technique [0002] The inkjet printing system can deposit functional nanoparticle ink on the surface of the substrate to realize rapid processing of nanoparticle conductive circuits. There are many factors that affect the accuracy of inkjet printing deposition patterns, such as: ink stability, substrate hydrophilicity and hydrophobicity, surface roughness, etc. Improving the accuracy of inkjet printing deposition patterns can better process and control conductive lines. Therefore, how to improve the printing accuracy or control the deposition pattern has always been an important area of ​​research. The Leidenfrost phenomenon refers to that when the substrate temperature is high, the liquid droplets deposit on the surface of the substrate and locally contact and vaporize into a gas...

Claims

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Application Information

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IPC IPC(8): H05K3/12H05K3/18
CPCH05K3/125H05K3/18
Inventor 邱璐张梦森陶智王毅张盛丰
Owner BEIHANG UNIV