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A preparation method and product of a large-area nano-flexible electrode based on laser welding

A flexible electrode, laser welding technology, applied in laser welding equipment, welding equipment, conductive layers on insulating carriers, etc., can solve the problems of inability to prepare ultra-thin nano-thickness devices, inability to integrate devices together, and affecting human comfort. , to achieve the effect of avoiding precision reduction, rapid heating process and good integrity

Inactive Publication Date: 2020-12-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the preparation process proposed by these patents has one or more of the following disadvantages: 1) It is impossible to prepare devices with ultra-thin nanometer thickness; 2) The existence of the substrate makes sweating and heat dissipation poor, which affects the comfort of the human body; 3) It cannot break through the area 4) The function is not perfect, limited by the size of the area, it is impossible to integrate devices with various functions together; therefore, for these problems, it is necessary to propose a large-area laser welding based Fabrication process of multifunctional flexible electronic devices without substrate nanometer thickness

Method used

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  • A preparation method and product of a large-area nano-flexible electrode based on laser welding
  • A preparation method and product of a large-area nano-flexible electrode based on laser welding
  • A preparation method and product of a large-area nano-flexible electrode based on laser welding

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preparation example Construction

[0037] A preparation method and product of a large-area nano-flexible electrode based on laser welding, specifically including the following steps:

[0038] Step 1: Prepare a sacrificial layer solution that is very soluble in water. The sacrificial layer solution solute has high temperature resistance, is easily soluble in water, and is easy to evaporate, etc., and the prepared sacrificial solution must be less than the saturation value. Wherein the solute includes but not limited to sodium lauryl sulfate, dodecyltrimethylammonium chloride, sodium dodecylbenzenesulfonate, the solvent includes but not limited to water and alcohol, the mass ratio of solute and solvent The solute concentration affects the thickness of the sacrificial layer and the coating effect. Within the above range, the sacrificial layer solution can form a 1-2um thick sacrificial layer on the substrate surface, which can not only retain the surface morphology, but also achieve rapid The peeling effect, the ...

Embodiment 1

[0061] Mix 3.5g sodium lauryl sulfate and water at a mass ratio of 3.5:100, and stir at 25°C for 15 minutes to form a sacrificial layer solution; clean the substrate with deionized water, isopropanol, ethanol, and deionized water Ultrasonic cleaning with 100W power for 5 minutes, and then rinse with deionized water; soak the substrate with 1% hydrofluoric acid for 3 hours, and it will appear wrinkled; immerse the substrate in the sacrificial layer solution by coating method, and use the stretching rudder The machine is lifted vertically upward at a speed of 0.1mm / s. During the lifting process, the water is continuously evaporated to crystallize sodium dodecyl sulfate to form a sacrificial layer with a thickness of 1μm;

[0062] PI tape with a thickness of 20um is patterned by laser cutting; the patterned PI tape is attached to a substrate coated with a sacrificial layer; 0.8g of gold is evaporated and deposited on the substrate to form an 80nm thick gold film covering On the m...

Embodiment 2

[0065] Mix 16g of dodecyltrimethylammonium chloride with water at a mass ratio of 16:100, and stir at 50°C for 20 minutes to form a sacrificial layer solution; clean the substrate with deionized water, isopropanol, and ethanol 1. Ultrasonic cleaning with deionized water for 5 minutes according to the power of 100W, and then rinse with deionized water; soak the substrate with 5% hydrofluoric acid for 3 hours, and it will form wrinkles; the substrate is immersed in the sacrificial layer solution by coating method, Use the stretching steering gear to lift vertically upward at a speed of 0.4mm / s. During the lifting process, the water evaporates continuously so that sodium lauryl sulfate crystallizes and precipitates to form a sacrificial layer with a thickness of 2 μm;

[0066] A 50um thick PI tape is patterned by laser cutting; the patterned PI tape is attached to a substrate coated with a sacrificial layer; 1g of gold is evaporated on the substrate to form a 100nm thick gold film...

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Abstract

The invention belongs to the field of flexible skin electronics and discloses a large-area nano-flexible electrode preparation method based on laser welding and a product. The method comprises the steps of (a) preparing a flexible electrode to obtain a flexible electrode to be connected and placing the flexible electrode to be connected in physiological saline to move such that two ends to be connected are close to a preset range, dropwise adding a phagocytizing object and a phagocytized object at two ends to be connected such that the phagocytizing object actively phagocytizes the phagocytized object, allowing the two ends to be connected to be close to each other until the two ends overlap in the phagocytosis process to complete biological connection, and (b) salvaging the flexible electrode with the completion of biological connection, then applying a laser absorbent to a biological connection portion, scanning with a femtosecond laser such that the biological connection portion ismelted and welded together to obtain the desired large-area nano-flexible electrode. Through the invention, the connection of a large-area nano thick flexible electrode is realized, and the process issimple and convenient.

Description

technical field [0001] The invention belongs to the field of flexible epidermal electronics, and more specifically relates to a preparation method and product of a large-area nanometer flexible electrode based on laser welding. Background technique [0002] With the increasing demand for flexible electronic devices, the functions of devices need to be more complete and diversified. The emergence of multifunctional devices will inevitably lead to an increase in the device area, and the previous preparation process is usually difficult to achieve large-area manufacturing. In the existing small number of large-area manufacturing processes, the device performance is not as good as the miniaturized device. The preparation process not only has the functional quality advantages of miniaturized manufacturing, but also has the functional quantity advantages of large-area manufacturing. [0003] At present, some flexible electronic device manufacturing processes have been developed. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/28
CPCB23K26/36B23K26/21H01B5/14
Inventor 邓鹏飞申曜鑫张树昌黄永安
Owner HUAZHONG UNIV OF SCI & TECH