Patent ID: 9063192
Filing Date: 2015-06-23
Classification: G01R,G11C,H01L

Abstract:
1. A method comprising: providing first and second semiconductor devices, each comprising a transistor having a split gate electrode having first and second gate portions, and having a respective ratio between an area of the first gate portion thereof and a sum of areas of the first and second gate portions thereof; for each device, applying a stress voltage to the first gate portion, but not to the second gate portion; and for each device, biasing the first and second gate portions with a common voltage, and collecting data indicating a respective degradation for each device due to the stress voltage, the degradation having a component due to time dependent dielectric breakdown (TDDB) and a component due to bias temperature instability; using a programmed computer to extrapolate from the collected data to compute a value of the degradation component due to TDDB.