Chamfered-edge laser cleaving of transparent materials

Kaiser, Myriam; Dounassre, Hamza; Kahmann, Max; Hellstern, Julian; Kleiner, Jonas; Tillkorn, Christoph; Flamm, Daniel; Holtkamp, Bill

doi:10.1117/12.2607604

Cited by 7 publications

(24 citation statements)

References 33 publications

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“…3 In the future a stationary optics solution will be available that allows for high-NA focusing in large working volumes and with large working distances. 8 A rotational module already known from the TOP Cleave-2 PRO cutting optics will allow to rotate the central beam splitter realized as diffractive optical element during processing of complex contours.…”

Section: Cleaving Glass Disks With Chamfered Edgesmentioning

confidence: 99%

“…8 Unlike existing concepts based on inclined 9,10 or accelerated non-diffracting beams 11,12 for tailored edge glass cleaving, our photonic shaping tools go far beyond their capabilities in terms of possible radii of curvature or variety of edge shapes. 8 Furthermore, it has already been successfully demonstrated that the substrates processed in this way exhibit enhanced mechanical properties, i.e., edge protection is in fact provided by the tailored-edge cleaving. 3 In this work we will expand this concept to cutting substrates in arbitrary contours, including circular or display geometries.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laser glass cutting of complex contours with tailored edges

Kleiner¹,

König²,

Kaiser³

et al. 2023

Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIII

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The laser-based fabrication of glass substrates with chamfered edges and arbitrary contour geometries is reported. To achieve energy deposition along any edge geometry, a holographic beam splitter is used generating a large number of focus copies in the bulk of transparent materials. If an adapted rotation of the focus distribution is additionally used during machining, the production of substrates with arbitrary contours, such as circular or display geometries, is enabled. After the laser modification step, separation is achieved using a selective laser etching strategy. The advantages of our process are discussed using selected process results and associated laser parameters.

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Section: Cleaving Glass Disks With Chamfered Edgesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser glass cutting of complex contours with tailored edges

Kleiner¹,

König²,

Kaiser³

et al. 2023

Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIII

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“…8,14 Here, we applied a 30 wt-% KOH solution to modified Corning Gorilla ® glass samples and achieved detached workpieces within less than one hour. 7 In Sec. 1 we have already briefly discussed the advantages of separation by thermal stress, in particular by CO 2 laser radiation.…”

Section: Separation Of Multi-spot-modified Glasses With Co2 Lasersmentioning

confidence: 99%

“…First, spatiotemporally shaped ultrashort laser pulses at λ ∼ 1 µm are used to non-linearly modify glass substrates along chamfered or C-shaped geometries within a single pass. 7 Here, such edge shapes are of relevance that help to protect the substrate from cracking or chipping in the event of an impact. 8 Second, CO 2 laser radiation operating at λ ∼ 10 µm is applied to the surface close to the modified area.…”

Section: Introductionmentioning

confidence: 99%

Tailored-edge laser glass cleaving supported by thermal separation

Kaiser

Kahmann

Kleiner

et al. 2023

Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXVIII

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A two-step laser-based concept is presented for cleaving glass substrates with tailored edges. In a first step beam shaped ultrashort laser pulses are used to modify the transparent material along chamfered or C-shaped edges. Secondly, thermal stress is applied close to the modified area by absorbing the radiation from CO2 laser. The tensile stress thus induced on the upper side of the glass leads to the actual release. The efficacy of our approach is demonstrated by presenting selected samples with tailored shaped edges and discussing corresponding edge qualities.

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“…It therefore paves the way to a broad bandwidth of novel, laser-based material processing applications from the improved impact resistance of displays to new mounting concepts for optical components. For more details see [6,7].…”

Section: Tailored Edgesmentioning

confidence: 99%

Cutting glass with photons

Kahmann

Kaiser²,

Kleiner³

et al. 2022

PhotonicsViews

Self Cite

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A comprehensive report is provided here about the state of the art and recent advances in cutting glass with ultrashort pulsed lasers. Several optical concepts are discussed that enable single‐pass, full thickness modification of transparent articles in the most diverse geometries, such as architectural glass or glass tubes. We also highlight the trend towards tailored glass edges for substrate protection with laser‐fabricated chamfers. A completely new beam‐shaping concept is used here, in which a large number of focus copies are distributed along any edge shape in order to combine cutting and chamfering within a single laser process.

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Chamfered-edge laser cleaving of transparent materials

Cited by 7 publications

References 33 publications

Laser glass cutting of complex contours with tailored edges

Laser glass cutting of complex contours with tailored edges

Tailored-edge laser glass cleaving supported by thermal separation

Cutting glass with photons

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