Innovative applications of laser technology in the field of glass processing

Microporous (diameter less than 300 microns) processing is an important process in microdevice manufacturing, and it usually requires the processing of high-depth-to-diameter ratio and high-precision micropores in the fields of microfluidic device manufacturing, electronic packaging, etc. In the field of precision manufacturing, the size and quality of micropores are very high, and the use of traditional processing technology often cannot meet the requirements, and the use of laser processing glass material technology, especially the use of femtosecond laser, is the most suitable processing method, which can process high-quality micropores with an aperture of 72 microns, a depth of 1824 microns, and a depth-diameter ratio of 25.3:1.

Process solar photovoltaic glass holes

In the solar photovoltaic manufacturing industry, photovoltaic glass is its important component, it is mainly divided into panel glass and backing glass, backsheet glass replaces the traditional module backplane material PVDF film (combustible) with glass to improve the fire resistance and waterproof level of the module, reduce the potential-induced attenuation, and extend the service life of the module. The most important process in the production of back glass is to process small holes, and often special-shaped holes, the use of traditional processing technology is more difficult to meet the requirements, the use of laser processing glass material technology can obtain better processing quality (high precision, good stability, smooth hole wall), and can easily make special-shaped holes, and the processing speed is fast; In addition, there is no need for secondary processing such as rinsing, sanding, and polishing after processing, reducing manufacturing costs.

Preparation of glass coatings on the surface of metal pipes

Pipeline is the fifth largest mode of transportation after railway, road, sea and aviation, undertaking various energy, heat and material transportation tasks, and has developed rapidly with its unique advantages. Oil pipelines occupy an important position in the petroleum industry, but metal pipelines are prone to corrosion, which can cause huge economic losses and even catastrophic accidents, and also limit their use in industry. Therefore, it is necessary to solve the problem of anti-corrosion of metal pipes, and the preparation of glass coatings on the surface of metal materials is an important means to solve this problem. The glass powder will melt at the same time as the surface of the substrate material under the action of the high-energy laser beam, forming a thin layer of glass melting substance, so that the surface of the substrate material becomes more wear-resistant, corrosion-resistant, heat-resistant, and oxidation-resistant.

β light source glass tube sealing

β light source is a self-emitting light source that uses fluorescent materials to emit light using β particles, that is, it is a light source that does not require an external power supply. Some radioactive materials (such as tritium, carbon-14, strontium-yttrium-90, cesium-137, etc.) emit β particles, and this substance and fluorescent substances are placed in glass tubes to make β light sources. Because this light source does not require a power supply, it has a wide range of applications, especially in some places where it is difficult to lay circuits, such as disaster relief sites, oil fields, mines safety zone signs and lighting, underwater rescue, etc. It is usually used, and it is often an irreplaceable light source. The key technical problem in manufacturing β light source is the sealing of glass tubes, using traditional flame hot melt sealing, the heat in the sealing process is difficult to accurately control, can not ensure the uniform heating of the sealing and the diffusion of heat inside the glass tube, will cause the sealing of the glass tube to be poor, affect the characteristics of the particle emission source material and luminous material β the glass tube, thus affecting the luminous efficiency and service life of the β light source. The use of laser processing glass material technology can well solve the technical problems of glass tube sealing, the sealing is smooth, the sealing is good, and the material properties in the tube are almost not affected during the sealing process.

Processing quartz plates

As an inertial navigation instrument or remote control telemetry instrument, quartz flexible accelerometer occupies a very important position in the field of aerospace and aviation technology. As the core device of quartz flexible accelerometer, quartz pendulum directly affects the accuracy and accuracy of accelerometer measurement. However, the shape of the quartz pendulum is complex and the size is small, with a thickness of only 0.66~0.76 mm, of which the thickness of the cantilever beam structure and the triboss structure of the key part is only about 20 microns, and the seam width of the "C" groove part of the quartz pendulum is only 0.3±0.1 mm. Traditional processing technology often fails to meet this technical requirement, but laser processing glass material technology can process high-quality quartz plates to ensure the high precision of quartz flexible accelerometers.

Process the microstructure of the glass surface

Laser processing glass material technology can also create fine microstructures (such as micro-raised or concave structures) on the surface of glass materials with high processing speed. For example, making microstructures on the surface of solar equipment cover glass can reduce the reflection loss of cover glass to sunlight and improve the photoelectric conversion efficiency of solar cells. Making microstructures on the surface of glass optical components can improve the uniformity and clarity of optical component imaging and greatly improve the imaging quality of the instrument. Processing microchannels on glass surfaces can realize the injection and flow of microfluids, which has important application value in analytical chemistry, environmental monitoring, biology and medicine, such as simulating these microchannels into biological capillaries, simulating blood or drug flow in blood vessels, and aiding scientific research.

summary

While glass has many advantages, its brittleness makes it difficult to precision machine. Using the laser processing technology developed in recent years, by adjusting the wavelength, power and pulse width of the laser, and adding preheating, prestress and other means, it can avoid microcracks, chips and other phenomena in the process of glass material processing, and obtain glass components with high precision and good quality, which are more and more widely used in modern microelectronics manufacturing, solar equipment manufacturing, display manufacturing, aerospace manufacturing and other fields.