How to use green light to scribe glass

Glass is the most widely used industrial product in building exterior walls, automotive glass, LCD glass, etc. In the solar photovoltaic industry, glass is usually used as a carrier of conductive oxides or organic oxides and metal oxides. After laser etching equipment, it is separated into different electrodes to complete the photoelectric conversion, form a battery, and store electrical energy. It is a clean and sustainable energy source.

With the continuous development of science and technology, solar cell technology is constantly innovating. A new glass substrate coating process is introduced, which can effectively improve the photoelectric conversion efficiency of organic solar cells. That is, using ultra-thin float glass, laser etching is used to directly scribe lines on the surface of the white glass, with line spacings of 500, 15 microns, 10 microns and 20 microns. Secondly, the titanium oxide layer on the surface of the float glass is directly scratched with a line width of 50 microns, a spacing of 500 microns, and a width of 500 millimeters to separate the titanium oxide and avoid damaging the glass.

After receiving the above request, the Leiser Laser Organization conducted tests and tested green light and ultraviolet light respectively based on previous experience. The experimental results show that the result of the ultraviolet laser etcher marking of the glass is that the material absorbs light unevenly. During the first marking, some positions have been processed, and some places have not been processed at all. After the second marking, the original processed part is laser etched to deepen the line groove of the original processed part. After multiple adjustments on issues such as focus and straightness, the test results were consistent and could not meet the customer's processing requirements, so the UV laser etcher was abandoned in terms of process technology.

When the green laser etcher was used to process white glass, the glass burst directly, causing the test to fail. Feedback the initial results to the customer. The user said that the process currently used by the factory is a helium-neon laser etcher with a wavelength of 254nm. The existing process has a short laser life and requires frequent replacement of laser gas, which affects the production progress and requires the search for new alternatives. In addition, customers will also provide very important information. The glass used by the user is filtered by a special wavelength coating and has poor absorption of the ultraviolet and green light bands. This information is very important, so communication with customers is crucial, and progress and results can be fed back to customers in a timely manner to ensure timely communication and smooth process.

Using the customer's glass information collection and ultrafast processing using the laser infrared band, the processing results were evaluated by Leiser Laser to meet the customer's processing requirements. After initial communication via email, the customer requested sample testing, and the technical appraisal by the customer's technical department, the experiment proved that the ultrafast laser etching function can effectively solve the problem of float ultra-thin glass marking, and can effectively meet the needs of users to replace equipment, providing new solutions for the application of the photovoltaic industry.