公开(公告)号：US20240227084A1

公开(公告)日：2024-07-11

申请号：US18409364

申请日：2024-01-10

Applicant: Schott AG

Inventor： Fabian Wagner ,  Matthias Jotz ,  Andreas Ortner ,  Renè Liebers ,  Christopher Mauer ,  Pascal Schumacher

IPC: B23K26/53 ,  B23K26/06 ,  B23K26/0622 ,  B23K26/40

CPC classification number: B23K26/53 ,  B23K26/0624 ,  B23K26/0648 ,  B23K26/40 ,  B23K2103/54

Abstract: A method for dividing a workpiece into elements includes: a pulsed laser beam of an ultrashort pulse laser is directed onto a workpiece composed of brittle-hard material; instances of filamentary damage are introduced next to one another along a path. The distance between the instances of filamentary damage at least in one portion of the path is selected such that one of the following conditions is met: (i) the difference in terms of magnitude between the characteristic fracture strengths of the element upon bending in opposite directions in this portion is at most 10 MPa; (ii) the difference in terms of magnitude between the characteristic fracture strengths of the element upon bending in opposite directions in this portion is at least 30 MPa; and (iii) the difference in terms of magnitude between the fracture strengths upon bending of the element in opposite directions is at least 30 MPa*d[mm]*π/3.