US 12,110,247 B2
Method for separating a glass element and glass sub-element
David Sohr, Mainz (DE); Clemens Kunisch, Armsheim (DE); and Kurt Nattermann, Ockenheim (DE)
Assigned to SCHOTT AG, Mainz (DE)
Filed by SCHOTT AG, Mainz (DE)
Filed on Mar. 1, 2021, as Appl. No. 17/188,715.
Claims priority of application No. 10 2020 105 358.4 (DE), filed on Feb. 28, 2020; and application No. 10 2020 123 197.0 (DE), filed on Sep. 4, 2020.
Prior Publication US 2021/0269350 A1, Sep. 2, 2021
Int. Cl. C03B 33/02 (2006.01); B23K 26/53 (2014.01); C03B 33/10 (2006.01)
CPC C03B 33/0222 (2013.01) [B23K 26/53 (2015.10); C03B 33/102 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for separating at least a portion of a glass element along a separation face, comprising the steps of:
providing the glass element that comprises a glass body of a glass material;
controlling a line focus of a light beam within the glass body to form a tensile stress zone and two compressive stress zones in the glass material along the separation face, wherein the tensile stress zone is between the two compressive stress zones;
introducing an initial damage to form a crack in the glass material in the tensile stress zone;
propagating the crack within the glass material between the two compressive stress zones to form the separation face; and
separating the glass element along the separation face.