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Method for preparing marking pattern on polyimide surface based on femtosecond laser processing

A femtosecond laser processing and polyimide technology, which is used in metal processing equipment, laser welding equipment, welding equipment and other directions to achieve good processing effects and clear display effects.

Active Publication Date: 2022-01-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no publication on the use of femtosecond laser processing polyimide surface to prepare marking patterns to achieve information storage and encryption

Method used

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  • Method for preparing marking pattern on polyimide surface based on femtosecond laser processing
  • Method for preparing marking pattern on polyimide surface based on femtosecond laser processing
  • Method for preparing marking pattern on polyimide surface based on femtosecond laser processing

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Embodiment 1

[0027] Embodiment 1, a method for preparing a marking pattern based on femtosecond laser processing polyimide surface, comprising the following steps:

[0028] 1) A polyimide film with a thickness of 125 μm is used as a sample;

[0029] 2) Build the optical path, refer to figure 1 , the output light of the femtosecond laser 1 sequentially passes through the first half-wave plate 2, the Glan Taylor prism 3, the second half-wave plate 4 and the pinhole diaphragm 5, and finally passes through the two-axis scanning galvanometer system 6 to focus on the scissor lift table 7, the femtosecond laser 1 and the two-axis scanning galvanometer system 6 are connected to the computer;

[0030] 3) Using a computer to adjust the output laser of the femtosecond laser 1, the laser wavelength is 800nm, the pulse width is 120fs, the repetition frequency is 1kHz, and the maximum single pulse energy is 5mJ;

[0031] 4) Fix the sample on the processing station 7 of the scissor lift table, adjust t...

Embodiment 2

[0034] Embodiment 2, a method for preparing a marking pattern based on femtosecond laser processing polyimide surface, comprising the following steps:

[0035] 1) A polyimide film with a thickness of 125 μm is used as a sample;

[0036] 2) Build the optical path, refer to figure 1 , the output light of the femtosecond laser 1 sequentially passes through the first half-wave plate 2, the Glan Taylor prism 3, the second half-wave plate 4 and the pinhole diaphragm 5, and finally passes through the two-axis scanning galvanometer system 6 to focus on the scissor lift table 7, the femtosecond laser 1 and the two-axis scanning galvanometer system 6 are connected to the computer;

[0037] 3) Using a computer to adjust the output laser of the femtosecond laser 1, the laser wavelength is 800nm, the pulse width is 120fs, the repetition frequency is 1kHz, and the maximum single pulse energy is 5mJ;

[0038] 4) Fix the sample on the processing station 7 of the scissor lift table, adjust t...

Embodiment 3

[0043]Embodiment 3, change the traditional marking pattern parameter into laser energy 100mW in step 4) in embodiment 1 and embodiment 2, scanning speed 25mm / s, scanning distance 5 μ m; Color code pattern parameter is changed into: laser energy 100mW, black The scanning speed is 25mm / s when it is yellow or purple, and the scanning speed is 125mm / s when it is yellow or purple, and the scanning distance is 5μm.

[0044] The effect of this embodiment is similar to that of Embodiment 1 and Embodiment 2.

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Abstract

The invention discloses a method for preparing a marking pattern on a polyimide surface based on femtosecond laser processing. The method comprises the following steps: firstly, taking a polyimide film with the thickness of 125 microns as a sample; then establishing a light path, adjusting a femtosecond laser by a computer to output laser, the laser wavelength is 800 nm, the pulse width is 120 fs, the repetition frequency is 1 kHz, and the maximum single pulse energy is 5 mJ; fixing the sample on a shear type lifting platform processing station, adjusting laser energy and scanning speed, and obtaining a traditional marking pattern and a color code pattern on the sample; micro-nano irregular structures are distributed on the processing surface of a traditional mark, and the micro-nano structures have an anti-reflection effect, so that the recognition rate of a mark pattern is improved; the color code pattern is processed by being divided into four parts according to colors during preparation, and black, yellow and purple parts are firstly extracted respectively during identification and then are synthesized into the color code pattern; according to the method, information tracing, storage and encryption of parts can be realized.

Description

technical field [0001] The invention belongs to the technical field of laser pattern manufacturing, in particular to a method for preparing a marking pattern based on femtosecond laser processing polyimide surface. Background technique [0002] The traceability of parts is the guarantee of product quality. The key to realizing real-time tracking of product information is to make the product have its unique identification. At present, the two-dimensional code has become a very widely used method of product identification and information traceability. In order to increase the data density of the traditional two-dimensional code, people have proposed a color code, that is, adding color as a new one-dimensional, so that the color code can contain more information while keeping the size of the original two-dimensional code unchanged. Compared with the traditional two-dimensional code, the color code introduces more dimensions to express information, which greatly increases the in...

Claims

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Application Information

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IPC IPC(8): B23K26/362B23K26/402B23K26/064
CPCB23K26/362B23K26/402B23K26/064B23K26/0652
Inventor 王文君孙小云梅雪松陈玉虎周梦胡磊崔健磊刘斌
Owner XI AN JIAOTONG UNIV
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