Koki SO1X7C48 – M500C low Ag Pb-free solder paste is said to improve solder joint reliability compared to conventional low Ag solder pastes. Reportedly reduces head-in-pillow defects; has high solder joint strength and offers thermal cycling reliability and low voiding.

Koki Company Ltd., www.ko-ki.co.jp 
Christopher Associates Inc., www.christopherweb.com