A method for laser-induced joining of a vitreous joint partner with a foreign parts to be joined with the aid of ultrashort laser pulses

摘要

A method for laser-induced joining a first, glass-like joint partner with a second joining members with the aid of ultrashort laser pulses, comprises the following process steps:– Positioning of the two joining partners (5, 6) with a gap (s) between their surfaces to be joined (7, 8) in a joining plane (fe),– Irradiation of an beam (2, 14) of an ultra short pulse - laser (1, 16) in the vitreous joining partners (5) with the focus (9) in the vicinity of the joining plane (fe), with the formation of a melt zone (10) and a low-viscosity zone (11) in the vitreous joining partners (5) in such a way that the spatial extent of the low-viscosity zone (11) and the thermal expansion of the melt zone (10) a bulging (12) of the surface (7) of the glass-type joint partner (5) with reduction of the gap (s) to the second joining members (8) on a measure (s) in order to achieve an optical contact of the joining partners (5, 6), and– Adhesion of the joining partners (5, 6), on the basis of the region of the joining zone (13) acting van - of the - waals - forces between the parts of a joint (5, 6),– with a focused ultra short pulse - laser beam (2, 14) in the melt zone (10) is irradiated, so that there, in addition, gas bubbles (15) can be generated, wherein the increase of the volume of the protrusion (12) of the surface (7) of the glass-type joint partner (5) and the reduction of the gap (s) between the parts of a joint (5, 6) supports.