SEALING OF ELECTRONIC MODULE PACKAGES
The article deals with the results of a study of Kovar (Fe-29 % Ni-18 % Co) welded joints. The welding was carried out in order to obtain a sealed joint. The difficulty of welding is due to the miniature size of the workpiece itself; therefore, to create a seal weld we chose the laser seam sealing. High-concentrated flow of energy has been made with a solid-state laser. The experiments showed the effective-ness of pulsed laser welding use. The main characteristics of laser radiation, resulting in a significant change in the temperature of the heating zone were determined by a computational method. The parameters of laser welding, which affect the welding conditions and formation of quality weld seams were revealed. Seeing the ultimate goal is the depth of penetration, size of heat-affected zone, weld spots overlapping and crack-free and gas voidless, determines the sealing capability of the part, the quality of the weld seams. The structure of the obtained welded joints was investigated by optical metallography. It was experimentally determined the impact of the mode and welding conditions for weld seam structure and heat affected-zone formation and defects in welded joints.