Polymer TSV Fabrication Scheme with Its Electrical and Reliability Test Vehicle

Abstract

In this research, a novel process scheme for polymer TSV fabrication is proposed to solve the difficulty of polymer liner formation in TSV technology. The corresponding structure shows great manufacturability to replace traditional fabrication approach. In addition, Kelvin structure of the daisy chain is designed for evaluating electrical performance and reliability. Moreover, daisy chain with dummy TSV is designed to verify the impact of TSV pitch on TSV fabrication by using electrical measurement. The reliability tests include thermal cycling and humidity test to verify the quality of proposed polymer TSV design. Finally, a void-free polymer TSV with uniform liner formation is successfully fabricated and demonstrated.