Chenming Hu

Bio: Chenming Hu is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: MOSFET & Gate oxide. The author has an hindex of 119, co-authored 1296 publications receiving 57264 citations. Previous affiliations of Chenming Hu include Motorola & National Chiao Tung University.

Low power device technology with SiGe channel, HfSiON, and poly-Si gate

Abstract: We report solutions to the formidable challenges posed by integrating a HfSiON dielectric with a poly-Si gate for low-power device technology. A 1.5 nm EOT HfSiON is demonstrated with mobility comparable to SiO/sub 2/ and 3 orders of magnitude leakage reduction. A novel boron delta-doped strained-SiGe channel points a way out of the high threshold voltage problem associated with Fermi-pinning at the high-k/poly-Si interface and ameliorates short-channel effects in PMOS devices. In addition, a 20% hole mobility enhancement and 15% I/sub on/-I/sub off/ characteristics improvement are achieved owing to the compressive SiGe channel. NMOS PBTI lifetime of 35 years, and PMOS NBTI and NMOS hot carrier lifetimes of more than 1000 years are demonstrated at 1.2 V.

MOSFETs with 9 to 13 A thick gate oxides

Abstract: In this work, NMOSFETs with gate oxides between 9 to 13 A have been fabricated and its behavior analyzed. An improved methodology of extracting gate oxide thickness from the MOSFET gate currents in the accumulation regime is proposed. Experimental evidence for a mobility reduction mechanism, namely Remote Charge Scattering, has been presented. The mobility was found to be degraded because of scattering by ionized impurities in the poly-gate.

Publisher Correction: Enhanced ferroelectricity in ultrathin films grown directly on silicon.

Abstract: An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Modeling 20-nm Germanium FinFET With the Industry Standard FinFET Model

Abstract: In this letter, we present modeling results for germanium p-type FinFETs using the industry standard Berkeley Spice Common Multi-gate Field Effect Transistor (BSIM-CMG) model. The effect of perpendicular electrical field on hole mobility in germanium FinFETs is found to be different from silicon FinFETs. We present an updated Ge mobility equation to account for this difference. With this single update, BSIM-CMG agrees very well with the measured I-V data of Ge FinFETs with a gate-length from 130 to 20 nm. We conclude that a production quality standard model is available for simulation of circuits employing p-type Ge FinFET.

Analytical Modeling of Flicker Noise in Halo Implanted MOSFETs

Abstract: An improved analytical model for flicker noise (1/ $f$ noise) in MOSFETs is presented. Current models do not capture the effect of high-trap density in the halo regions of the devices, which leads to significantly different bias dependence of flicker noise across device geometry. The proposed model is the first compact model implementation capturing such effect and show distinct improvements over other existing noise models. The model is compatible with BSIM6, the latest industry standard model for bulk MOSFET, and is validated with measurements from 45-nm low-power CMOS technology node.

I and i

Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

Abstract: 抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。

High-κ gate dielectrics: Current status and materials properties considerations

Abstract: Many materials systems are currently under consideration as potential replacements for SiO2 as the gate dielectric material for sub-0.1 μm complementary metal–oxide–semiconductor (CMOS) technology. A systematic consideration of the required properties of gate dielectrics indicates that the key guidelines for selecting an alternative gate dielectric are (a) permittivity, band gap, and band alignment to silicon, (b) thermodynamic stability, (c) film morphology, (d) interface quality, (e) compatibility with the current or expected materials to be used in processing for CMOS devices, (f) process compatibility, and (g) reliability. Many dielectrics appear favorable in some of these areas, but very few materials are promising with respect to all of these guidelines. A review of current work and literature in the area of alternate gate dielectrics is given. Based on reported results and fundamental considerations, the pseudobinary materials systems offer large flexibility and show the most promise toward success...

Design of Analog CMOS Integrated Circuits

Abstract: The CMOS technology area has quickly grown, calling for a new text--and here it is, covering the analysis and design of CMOS integrated circuits that practicing engineers need to master to succeed. Filled with many examples and chapter-ending problems, the book not only describes the thought process behind each circuit topology, but also considers the rationale behind each modification. The analysis and design techniques focus on CMOS circuits but also apply to other IC technologies. Table of contents 1 Introduction to Analog Design 2 Basic MOS Device Physics 3 Single-Stage Amplifiers 4 Differential Amplifiers 5 Passive and Active Current Mirrors 6 Frequency Response of Amplifiers 7 Noise 8 Feedback 9 Operational Amplifiers 10 Stability and Frequency Compensation 11 Bandgap References 12 Introduction to Switched-Capacitor Circuits 13 Nonlinearity and Mismatch 14 Oscillators 15 Phase-Locked Loops 16 Short-Channel Effects and Device Models 17 CMOS Processing Technology 18 Layout and Packaging

Prospects of Colloidal Nanocrystals for Electronic and Optoelectronic Applications

Abstract: Nanocrystals (NCs) discussed in this Review are tiny crystals of metals, semiconductors, and magnetic material consisting of hundreds to a few thousand atoms each. Their size ranges from 2-3 to about 20 nm. What is special about this size regime that placed NCs among the hottest research topics of the last decades? The quantum mechanical coupling * To whom correspondence should be addressed. E-mail: dvtalapin@uchicago.edu. † The University of Chicago. ‡ Argonne National Lab. Chem. Rev. 2010, 110, 389–458 389