Session 12A-5

Scalability of Direct Silicon Bonded (DSB)Technology
for 32nm Node and Beyond

 

Abstract

Direct Silicon Bonded (DSB) technology is shown to be scalable for 32nm node and beyond for two integration schemes: Solid Phase Epitaxy (SPE)-before-Shallow Trench Isolation (STI) and STI-before-SPE. For SPE-before-STI, 32nm node ground rules can be met by thinning DSB thickness to ~70nm, which ensures complete removal of boundary defects by STI. For STI-before-SPE, a scaling-independent solution is provided by the use of 45deg rotated (100) base wafers which allow trench-defect-free SPE at the STI edges.