Joining of metal for high heat dissipation, such as heat sink, involves applying solder paste containing tin and zinc to junction of metal such as (aluminum) alloy or (copper) alloy, and removing solder paste

摘要

A solder paste containing tin and zinc is applied to junction portions of two or more metal chosen from aluminum, aluminum alloy, copper and copper alloy, so as to join the metal. The solder paste is then removed. Independent claims are also included for the following: (i) Joined material which is joined using the joining method; (ii) Solder paste used for joining the metal; (iii) Flux used for the solder paste; and (iv) Electronic machine equipped with the joined material.