Properties of MOS Capacitors Produced on SiGe Formed by Ge-implanted Si

Authors : M ŞAHİN, S ÖZDER, R TURAN

Pages : 43-52

View : 15 | Download : 10

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Metal-oxide-semiconductor insert ignore into journalissuearticles values(MOS); capacitors fabricated on Ge-implanted Si have been investigated by using C-V and G-V measurements. The control sample on pure Si substrate yielded normal C-V and G-V characteristics. The Ge-implanted MOS samples exhibited anomalous C-V and G-V behavior. The C-V curves of the samples were strongly frequency dependent both in the accumulation and inversion regions. They shift almost in parallel to higher values with decreasing frequency, reaching the oxide capacitance value in the quasi-static insert ignore into journalissuearticles values(QS); measurement. A band structure and equivalent circuit model were introduced to explain this and other features of the experimental observations. It is shown that the presence of a thin SiGe layer and/or trap states related to this layer may cause a frequency dispersion in the accumulation region of the C-V curves of MOS capacitors.
Keywords : Turk J Phys, 25, 2001, 43 52 Turk J Phys, vol 25, iss 1