Method for laser-induced joining of a vitreous joining partner with a joining partners of another kind using ultrashort laser pulses

摘要

A method for laser induced bonding a first, vitreous bonding partner with a second joining partner by using ultra-short laser pulses, the steps comprising: - positioning of the two joint partners (5, 6) with a gap (S) between their surfaces to be joined (7, 8) in a joining plane (FE), - irradiating a machining beam (2, 14) of an ultra-short pulse laser (1, 16) in the glass-like parts to be joined (5) with a focus (9) near the joining plane (FE) to form a melt zone (10) and a low viscosity zone (11 ) (in the glassy joining partner 5) such that the spatial extent of the low zone (11) and the thermal expansion of the melt zone (10) has a bulging (12) of the surface (7) of the glassy bonding partner (5) with a reduction of the gap (S ) gives the second join partner (8) back to a level (S) to obtain an optical contact of the joining partners (5, 6), and - adhering the parts to be joined (5, 6) due to the region of the joining zone (13) acting Van der Waals force between the joining partners (5, 6), - wherein a focused ultra-short pulse laser beam (2, 14) in the melt zone (10) is irradiated, so that there is additional gas bubbles (15) are produced, the increase in volume of the bulge (12) of the surface (7) of the glassy bonding partner (5) and supports the reduction of the gap (S) between the joint partners (5, 6).