PERFECTING THE PROCESSES FOR MANUFACTURING SERVICE BOXES AND THEIR COMPONENTS

摘要

Special alloys of the kind responding to the formula of 95% Sn 5% Sb or 52% Sn 45% Pb 3% Sb having a melting point greater than 183.degree.C are used in one of the preferred embodiments of the invention within this application as a first improvement in the welding of printed circuit boards. These alloys improve the quality of welding, as well as its influence on the long-term running of a service box, to the same as the life span of a car.