PB HIGH MELTING POINT SOLDER AND ITS PRODUCTION

摘要

PURPOSE:To obtain an inexpensive Pb high melting point solder that the solidus temp. and liquidus temp. are high and approaching each other, having excellent soldering by adding the specified quantity of Cu and Ge to Pb-Sn alloy. CONSTITUTION:The molten alloy 4 containing 0.5-5wt% Sn, 0.05-5wt% Cu and 0.05-2wt% Ge and consisting of the balance Pb is spouted on the surface of the cooling roll 1 moving at high speed and solidified in a tape shape directly from a molten metal. It has thus high solidus temp. and liquidus temp. and an excellent soldering to improve the operability in semiconductor bonding and to elevate the productivity and yet reliability.