Influence of parasitic memory effect on single-cell faults in SRAMs

Abstract

Parasitic node capacitance and faulty node voltage of a defective node can induce serious parasitic effects on the electrical behavior of SRAMs. This paper evaluates the impact of parasitic memory effect on the detection of single-cell faults in SRAMs. It demonstrates that detection is significantly influenced by parasitic node components; something that is often not accounted for during memory testing. Finally, it shows the impact of parasitic node components on all possible opens in the SRAM memory cell array, using node voltages from GND to VDD.