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Laser Method Drills Taper-, Crack-Free Holes in Glass

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JOEL WILLIAMS, ASSOCIATE EDITOR
[email protected]

Researchers from the Institute of Intense Lasers and Applications (CELIA) at the University of Bordeaux have developed a glass micro-drilling method using a femtosecond laser operating in gigahertz-burst (GHz burst) mode. The researchers used the method to achieve taper-free, elongated holes with smooth inner walls without creating cracks in the glass. Typically, laser drilling with standard single femtosecond pulses results in tapered holes of strongly limited length and rough inner surface. The laser-matter interaction regime permits the drilling of holes with high aspect ratio in a...Read full article

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    Published: January 2023
    Glossary
    aspect ratio
    With respect to pictorial displays, the ratio of the width to the height. The television standard in the US is 4:3. High-definition or wide-screen television will have a ratio of 16:9.
    glass
    A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or phosphoric oxides. Common window or bottle glass is a mixture of soda, lime and sand, melted and cast, rolled or blown to shape. Most glasses are transparent in the visible spectrum and up to about 2.5 µm in the infrared, but some are opaque such as natural obsidian; these are, nevertheless, useful as mirror blanks. Traces of some elements such as cobalt, copper and...
    fused silica
    Glass consisting of almost pure silicon dioxide (SiO2). Also called vitreous silica. Frequently used in optical fibers and windows.
    Research & TechnologyLasersdrillingmanufacturingindustrialfemtosecondgigahertzGHzaspect ratiomicro-drillingmicro-holesManek-HönningerglasssodalimeMaterialsfused silicaInternational Journal of Extreme ManufacturingEuropeTechnology News

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