Abstract
In this letter, the charge-pumping (CP) technique is validated for germanium MOSFETs. Effects of the smaller Ge bandgap on CP are discussed through both experiments and simulations. The standard CP setup with ~ 100-ns transition times at room temperature tuned for Si/SiO2 MOS evaluates the Ge interface-trap density only near midgap, and the total density is thus strongly underestimated. We show two CP methods which can be used to correctly reflect the actual complete interface-trap density by probing closer to the band edges. The use of low-temperature measurements to probe traps near the band edges with CP is discussed. CP measurements are demonstrated with transition times down to 6-ns at 300-K without making use of RF structures. Using these fast measurements, it is possible to obtain an interface state density closer to the band edges for Ge MOSFETs at 300-K.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
