ALLOY SOLDER AND ALLOY SOLDER MANUFACTURING METHOD

摘要

The present invention solves the problem of the bonding strength of a Pb-free alloy solder being inferior to that of the conventional Pb-containing alloy solder and provides a Pb-free alloy solder satisfactory in bonding reliability. An alloy solder is manufactured by adding a predetermined amount of carbon to a Pb-free solder in a high-temperature atmosphere of a temperature in the range of 800° C. to 1200° C. An alloy solder manufacturing method includes a melting process for melting a Pb-free solder by heating the Pb-free solder in a high-temperature atmosphere of a temperature in the range of 800° C. to 1200° C., a carburizing process for carburizing the molten Pb-free solder held in the high-temperature atmosphere by adding a predetermined amount of carbon to the molten Pb-free solder, a stirring process for stirring a mixture of the molten Pb-free solder and carbon, and a cooling process for cooling the mixture of the Pb-free solder and carbon stirred by the stirring process and poured into a mold to solidify the mixture.