The book, based on modern ideas about the conditions for ensuring high quality of soldered products and defects in solder joints, discusses the block diagram of the design of soldering technology, compatibility criteria for the design of the product, structural material, soldering technology, allowing to obtain optimal mechanical, physical and chemical properties of soldered joints and products. The most important data for selection of soldering methods, technical and auxiliary materials, soldering modes and cycles, heating equipment are given. Designed for designers, designers and technologists of various industries in which solder products are made.