Manufacture of high strength copper alloy with high electric conductivity

Abstract

Abstract PURPOSE:To obtain a lead frame material for IC with high strength, high electric conductivity and superior workability by hot working a Cu alloy contg. prescribed percentages of Cr and Sn under prescribed conditions. CONSTITUTION:A Cu alloy consisting of 0.2-1.5wt% Cr, 0.01-0.5wt% Sn and the balance Cu is refined and cast. The Cu alloy casting is hot worked, and the worked casting is cooled at an air cooling rate or above without carrying out soln. treatment. It is then cold worked and aged. Thus, a lead frame material for IC with high strength, superior workability and high electric conductivity is obtd.

Inventors

• 👤 Kishio Arita
• 👤 紀史雄 有田
• 👤 Toshio Takahashi
• 👤 俊夫 高橋
• 👤 Akio Miyoshi
• 👤 三好　明男
• 👤 Hajime Izumori
• 👤 泉森　一
• 👤 Koji Ishida
• 👤 石田　光司

Bibliographic Details