| 摘要 |
PROBLEM TO BE SOLVED: To provide a lead-free Sn-Ag based solder alloy and solder alloy powder, which are applicable under severe atmosphere related to the vibration and the heat. SOLUTION: This lead-free solder alloy is composed of, by weight, 0.10% Ni, 0.08% Al, 0.06% Ge, 0.2% Bi, 0.2% Ag and the balance Sn. The maximum stress of this lead-free solder alloy is 33.00 MPa, the maximum point distortion is 15.53 MPa and the maximum elongation is 64.09%. Further, according to the heat cycle accelerating test, in 1,000 cycle times, the number of broken pieces is 15 based on the 40 measured pieces. COPYRIGHT: (C)2010,JPO&INPIT |
