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Phase-modified quasi-non-diffracting laser beams for high angle laser processing of transparent workpieces

A transparent workpiece, laser technology, used in laser welding equipment, metal processing equipment, manufacturing tools, etc.

Pending Publication Date: 2022-02-25
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process produces glass dust and particles that must be cleaned by additional processes involving washing or chemical treatment

Method used

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  • Phase-modified quasi-non-diffracting laser beams for high angle laser processing of transparent workpieces
  • Phase-modified quasi-non-diffracting laser beams for high angle laser processing of transparent workpieces
  • Phase-modified quasi-non-diffracting laser beams for high angle laser processing of transparent workpieces

Examples

Experimental program
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Embodiment Construction

[0046] Reference will now be made in detail to embodiments of a process for laser machining a transparent workpiece, such as a glass workpiece, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. According to one or more embodiments described herein, a transparent workpiece may be laser machined to form a profile in the transparent workpiece that includes a series of defects along a desired separation line for separating the transparent workpiece into two or more a separate product. Each of the defects includes a defect angle greater than 10° such that after separating the transparent workpiece along the contour, the resulting separated article includes angled edges having an edge angle greater than 10°. Defects can be formed in transparent workpieces using a low diffracting beam, such as a quasi-non-diffracting beam, focused into the focal line o...

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Abstract

A method for processing a transparent workpiece that includes directing a laser beam the transparent workpiece. The laser beam incident to the impingement surface has an oblong angular spectrum and portion of the laser beam directed into the transparent workpiece is a laser beam focal line and generates an induced absorption to produce a defect within the transparent workpiece. The laser beam focal line includes a wavelength lambda, a spot size wo , a Rayleigh range ZR that is greater than FD (I) wherein FD is a dimensionless divergence factor comprising a value of 10 or greater, and an internal beam angle of greater than 10 degrees relative to a plane orthogonal to an impingement surface at an impingement location, such that the defect has a defect angle within the transparent workpiece of greater than 10 degrees relative to a plane orthogonal to the impingement surface at the impingement location.

Description

[0001] This application claims priority under 35 USC § 119(e) to US Provisional Patent Application Serial No. 62 / 849,364, filed May 17, 2019, and is incorporated herein by reference in its entirety. [0002] background [0003] field [0004] The present description relates generally to apparatus and methods for laser processing of transparent workpieces, and more particularly to a laser beam comprising a focal line of the laser beam which is quasi-non-diffracting and which, when at a non-normal angle of incidence Retains quasi-non-diffractive properties when guided into a transparent workpiece. [0005] technical background [0006] The field of laser processing of materials covers various applications involving cutting, drilling, milling, welding, melting, etc. of different types of materials. Of these processes, one of particular interest is the cutting or separation of different types of silicon in a process that can be used to produce materials such as glass, sapphire, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/073B23K26/53C03B33/02B23K103/00
CPCC03B33/0222B23K26/53B23K26/0738B23K2103/54B23K26/38B23K26/359B23K26/073
Inventor V·V·伊万诺夫N·A·卡利提夫斯基N·萨维迪斯P·M·斯特林戈夫R·J·特布鲁根C·J·M·恩加洛
Owner CORNING INC