A static divide-by-2 frequency divider based on InP/InGaAs DHBT technology is presented. On chip thin film resistor and capacitor were integrated. Two levels of interconnect were developed. Composite collector design ...
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ISBN:
(纸本)9781467365451
A static divide-by-2 frequency divider based on InP/InGaAs DHBT technology is presented. On chip thin film resistor and capacitor were integrated. Two levels of interconnect were developed. Composite collector design and 0.5μm emitter width enable the static frequency divider operated at a frequency over 100GHz.
Sapphire substrate was treated by SiH4 under NH3 atmosphere before GaN growth and nano-size islands SiNx mask was formed on the substrate. Properties of GaN films were investigated by high resolution X-ray diffraction...
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4H-SiC JBS diode with breakdown voltage higher than 6.5 kV has been successfully fabricated on 4H-SiC wafers with epitaxial layer. In this paper, the simulation, the fabrication, and the electrical characteristics of ...
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Because of difficulty in deep ion implantation, the recessed gate structure has been favored in SiC SIT. In order to improve the frequency, it is a good method to decrease the gate length by eliminating the side wall ...
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WS2 is an attractive two-dimensional semiconductor material for electronic and optoelectronic device applications due to its high phonon limited mobility compared to other transition metal dichalcogenides. The measure...
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WS2 is an attractive two-dimensional semiconductor material for electronic and optoelectronic device applications due to its high phonon limited mobility compared to other transition metal dichalcogenides. The measured field-effect mobility thus far, however, is much smaller than theoretical predictions, dominated by extrinsic factors including charge traps and impurities. Here, we report that the combination of high-quality Al2O3 dielectric substrate and thiol chemistry passivation could effectively reduce the interface traps and Coulomb impurities, leading to a significant improvement of device performances. Especially, metallic transport is observed at higher carrier density and low temperature. Moreover, through repairing sulfur vacancies, record high mobility is reached at room temperature(83 cm2V-1s-1) and low temperature(337 cm2V-1s-1). Furthermore, we develop a theoretical model for explaining charge transport in the monolayer WS2. Our work provides a viable route towards studying intrinsic charge transport in monolayer WS2 devices.
This paper presents a hybrid-π equivalent circuit extract method for graphene field-effect transistors up to 66 GHz. Because the G-FET channel cannot be pinched off, the open and short structures are used to remove p...
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ISBN:
(纸本)9781467365451
This paper presents a hybrid-π equivalent circuit extract method for graphene field-effect transistors up to 66 GHz. Because the G-FET channel cannot be pinched off, the open and short structures are used to remove parasitic element of the pad. The intrinsic elements of the model parameters are extracted from measured S-parameters directly. The model is verified with experiments and simulations, and good agreements are observed. The model will provide some insights and guidance for the practical use of the GFETs and can be embedded in circuit simulation tools.
A metal contact RF MEMS switch based on single crystal silicon is presented in this article. Performance of the switch is demonstrated numerically in simulations. The mN-level contact and release forces are achieved. ...
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WS2 is an attractive two-dimensional semiconductor material for electronic and optoelectronic device applications due to its high phonon limited mobility compared to other transition metal *** measured field-effect mo...
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WS2 is an attractive two-dimensional semiconductor material for electronic and optoelectronic device applications due to its high phonon limited mobility compared to other transition metal *** measured field-effect mobility thus far,however,is much smaller than theoretical predictions,dominated by extrinsic factors including charge traps and impurities.
A novel model method for III-V HEMTs small-signal model parameter extraction is presented in this work. All the model elements are directly derived from hot S-parameters, rather than cold S-parameters, by using vector...
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