Abstract
We have studied experimentally the time dependence of leakage currents in six CMOS (complementary metaloxide semiconductor) processes using LOCOS (local oxidation of silicon) isolation structures. These six process lines represent six different U. S. semiconductor companies. In their radiation response, these processes range from very hard to very soft. In the softer processes, the radiation-induced leakage currents are due to the turning on of a leakage path either under the thick field-oxide or along the transistor edge (bird's beak) region. In the hardest process, the field-oxide did not turn on, and the leakage was entirely due to subthreshold current in the gate region. These different mechanisms have qualitatively different time dependences, which we describe and discuss. We also discuss the implications of our results for hardness assurance testing.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.