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Laser welding absorption film

A technology of absorbing thin film and laser welding, which is applied in the direction of laser welding equipment, welding equipment, superimposed layer coating, etc.

Inactive Publication Date: 2004-02-18
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art, provide a strong absorption film for the penetrating laser welding technology, greatly reduce the strong reflection loss in the current laser welding, reduce the laser power required for welding, and reduce the impact of the laser on the substrate. The destructive effect of penetrating matter

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Embodiment 1

[0025] The transparent material (1) is glass, and the refractive index of glass is 1.53. The thickness of each layer of the laser welding absorbing film is as follows: the thickness of the first metal layer (2) is 19nm, the thickness of the medium layer (3) is 200nm, and the thickness of the second metal layer (4) is 60nm. The curve of its reflectivity changing with the incident laser wavelength is as follows: image 3 shown. When the incident material is glass, the curve of laser reflectivity changing with the thickness of the first metal layer is as follows Figure 4 shown.

Embodiment 2

[0027] The transparent material (1) is quartz, and the refractive index of quartz is 1.47. The thickness of each layer of the laser welding absorbing film is as follows: the thickness of the first metal layer (2) is 19nm, the thickness of the medium layer (3) is 200nm, and the thickness of the second metal layer (4) is 60nm. The curve of its reflectivity changing with the incident laser wavelength is as follows: Figure 5 shown. When the incident material is quartz, the curve of laser reflectivity changing with the thickness of the first metal layer is as follows Figure 6 shown.

Embodiment 3

[0029] The transparent material (1) is a lithium niobate crystal, and the refractive index of the lithium niobate crystal is 2.183. The thickness of each layer of the laser welding absorbing film is as follows: the thickness of the first metal layer (2) is 26nm, the thickness of the medium layer (3) is 200nm, and the thickness of the second metal layer (4) is 60nm. The curve of its reflectivity changing with the incident laser wavelength is as follows: Figure 7 shown. When the incident material is lithium niobate crystal, the curve of laser reflectivity changing with the thickness of the first metal layer is as follows Figure 8 shown.

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Abstract

An absorption film for laser welding to greatly reduce the laser reflection and lower the power of laser is composed of the first and the second metal layers and a medium layer between said two metallayers.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a laser welding absorbing film. technical background [0002] One of the advantages of using laser welding in the prior art is that it has penetrability. In the penetration welding of non-metal and metal, laser can penetrate non-metal materials such as crystal and glass, and incident on the surface of non-metal, so that the two The interface of the two materials generates heat for welding. However, at the joint surface of the two materials, the metal material will strongly reflect the laser used for welding, such as the laser with a wavelength of 1.06 μ, reaching 80% effect, and the CO 2 The reflection of the laser (10.6μ) is more serious, which not only causes a great waste of light energy, but also the reflected light may damage the light source system. Therefore, the reflection of infrared by metal has always been a problem to be solved in la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/18C23C28/00
Inventor 江绍基柴红芳汪河洲
Owner SUN YAT SEN UNIV
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