S. Realov and K. L. Shepard, “On-Chip Combined C-V/I-V Transistor Characterization System in 45-nm CMOS,” Symposium on VLSI Circuits, 2011.
An on-chip transistor characterization system for combined C-V/I-V characterization is presented. Capacitance measurement uses a quasi-static charged-based measurement technique with atto-Farad resolution. Random and systematic variability in device I-V and C-V characteristics is studied. The random variability in intrinsic gate capacitance is shown to exhibit Pelgrom scaling. Correlation between I-V and C-V measurements is used to identify systematic channel-length variation gradients in a device array.