Method of soldering ceramic or difficult-to-wet metal material with higher shear strength and soldered joints ceramic / ceramic, ceramic / metal and metal / metal with titanium-free solder

摘要

The method of soldering a ceramic or hard-to-wettable metal material with a higher shear strength of a ceramic / ceramic, ceramic / metal and metal / metal solder with a titanium-free solder is carried out by first forming a laser-structured surface on the soldered smooth surface of the ceramic or hard-to-wettable metal material surface texture with square element elements 1.5 mm to 3.0 mm x 1.5 mm to 3.0 mm with conversion profile with a texture density of 12.5% to 51% and a texture depth of 0.05 to 0.2 mm. Subsequently, a Zn-free titanium-free solder is applied to the metal or ceramic part of the joint without microstructuring at a temperature of 250 ° C to 450 ° C, and an active ultrasound with a frequency of 40 kHz is applied.