Investigation and Effects of Wafer Bow in 3D Integration Bonding Schemes

This paper investigates and reviews the effects of wafer bow in three- dimensional (3D) integration bonding schemes, including copper wafer bonding and oxide fusion wafer bonding with silicon on insulator (SOI)-based layer transfer technology. Wafer bow criteria for good bonding quality and fabrication techniques to minimize wafer bow are introduced for 3D integration technology and applications.