Interposer FPGA with self-protecting ESD design for inter-die interfaces and its CDM specification

Abstract

Methodology proposed that relates 200V CDM voltage specification of S20.20-2014 standard to a realistic 100-200mA CDM peak current for inter-die interfaces. Tribology is considered to be the source of charge accumulation on the bare die during 3D/2.5D assembly. Bare die self-capacitance is introduced as a CDM modeling parameter in the environment of 3D/2.5D assembly. HBM/CDM qualification with respect to the S20.20-2014 standard is demonstrated for self-protecting die-to-die IOs in the second generation 20nm interposer FPGA.