Test structure apparatus for measuring standby current in flash memory devices

摘要

A flash memory microelectronic chip (1000) is formed with at least one integral test structure (100) for electrical measurement of transistor leakage current from the low voltage peripheral transistors. The invention is a very wide finger-type transistor (9, 10) with minimum channel length and a width of approximately 150,000 mum, equal to the estimated total width of the same type of periphery transistors in the chip circuit. One low voltage NMOS (9) and one low voltage PMOS finger-type transistor (10) allow monitoring of the standby current contribution from these two types of periphery transistors. Regular current or voltage tests can be applied to the test structure, thus providing information on the correlation of standby currents with single transistor off-state leakage currents.