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Physical insights into trapping effects on vertical GaN-on-Si trench MOSFETs from TCAD

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Journal of Semiconductors 2024年第3期45卷 45-52页

作者： NicolòZagni Manuel Fregolent Andrea Del Fiol Davide Favero Francesco Bergamin Giovanni Verzellesi Carlo De Santi Gaudenzio Meneghesso Enrico Zanoni Christian Huber Matteo Meneghini Paolo Pavan Department of Engineering“Enzo Ferrari” University of Modena and Reggio EmiliaModena 41125Italy Department of Information Engineering University of PadovaPadova 35131Italy Department of Sciences and Methods for Engineering(DISMI) University of Modena and Reggio EmiliaReggio Emilia 42122Italy EN&TECH Center University of Modena and Reggio EmiliaReggio Emilia 42122Italy Advanced Technologies and Micro Systems Department Robert Bosch GmbHRenningen 71272Germany

Vertical GaN power MOSFET is a novel technology that offers great potential for power switching *** still in an early development phase,vertical GaN devices are yet to be fully optimized and require careful studies to foster their *** this work,we report on the physical insights into device performance improvements obtained during the development of vertical GaN-on-Si trench MOSFETs(TMOS’s)provided by TCAD simulations,enhancing the dependability of the adopted process optimization ***,two different TMOS devices are compared in terms of transfer-curve hysteresis(H)and subthreshold slope(SS),showing a≈75%H reduction along with a≈30%SS *** allow attributing the achieved improvements to a decrease in the border and interface traps,respectively.A sensitivity analysis is also carried out,allowing to quantify the additional trap density reduction required to minimize both figures of merit.

关键词： vertical GaN trench MOSFET SiO_(2) interface traps border traps hysteresis BTI

Embedded fuzzing:a review of challenges,tools,and solutions

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Cybersecurity 2022年第4期5卷 1-18页

作者： Max Eisele Marcello Maugeri Rachna Shriwas Christopher Huth Giampaolo Bella Safety Security and PrivacyRobert Bosch GmbHRenningenGermany Dept.of Math and Computer Science Universita degli Studi di CataniaCataniaItaly RBEl Robert Bosch GmbHBangaloreIndia.

Fuzzing has become one of the best-established methods to uncover software ***,the market of embedded systems,which binds the software execution tightly to the very hardware architecture,has grown at a steady pace,and that pace is anticipated to become yet more sustained in the near *** systems also beneft from fuzzing,but the innumerable existing architectures and hardware peripherals complicate the development of general and usable approaches,hence a plethora of tools have recently *** comes a stringent need for a systematic review in the area of fuzzing approaches for embedded systems,which we term'embedded fuzzing"for *** inclusion criteria chosen in this article are semi-objective in their coverage of the most relevant publication venues as well as of our personal *** review rests on a formal definition we develop to represent the realm of embedded *** continues by discussing the approaches that satisfy the inclusion criteria,then defines the relevant elements of comparison and groups the approaches according to how the execution environment is served to the system under *** resulting review produces a table with 42 entries,which in turn supports discussion suggesting vast room for future research due to the limitations noted.

关键词： Embedded systems Dynamic analysis Vulnerability mining Embedded security Software security

Uncertainty-aware molecular dynamics from Bayesian active learning for phase transformations and thermal transport in SiC

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npj Computational Materials 2023年第1期9卷 2000-2007页

作者： Yu Xie Jonathan Vandermause Senja Ramakers Nakib H.Protik Anders Johansson Boris Kozinsky John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMAUSA Department of Physics Harvard UniversityCambridgeMAUSA Corporate Sector Research and Advance Engineering Robert Bosch GmbHRenningenUSA Interdisciplinary Centre for Advanced Materials Simulation Ruhr-Universität BochumBochumGermany Robert bosch LLC Research and Technology CenterWatertownMAUSA

Machine learning interatomic force fields are promising for combining high computational efficiency and accuracy in modeling quantum interactions and simulating atomistic *** learning methods have been recently developed to train force fields efficiently and *** them,Bayesian active learning utilizes principled uncertainty quantification to make data acquisition *** this work,we present a general Bayesian active learning workflow,where the force field is constructed from a sparse Gaussian process regression model based on atomic cluster expansion *** circumvent the high computational cost of the sparse Gaussian process uncertainty calculation,we formulate a high-performance approximate mapping of the uncertainty and demonstrate a speedup of several orders of *** demonstrate the autonomous active learning workflow by training a Bayesian force field model for silicon carbide(SiC)polymorphs in only a few days of computer time and show that pressure-induced phase transformations are accurately *** resulting model exhibits close agreement with both ab initio calculations and experimental measurements,and outperforms existing empirical models on vibrational and thermal *** active learning workflow readily generalizes to a wide range of material systems and accelerates their computational understanding.

关键词： computer thermal utilize

On the Simulation of Industrial Gas Dynamic Applications with the Disconti- nuous Galerkin Spectral Element Method

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Journal of Thermal Science 2016年第3期25卷 250-257页

作者： F. Hempert M. Hoffmann U. Iben C.-D. Munz Robert-bosch gmbh Robert-bosch Campus 1 71272 Renningen Germany Institute of Aerodynamics and Gas Dynamics Pfaffenwaldring 21 70569 Stuttgart Germany

In the present investigation,we demonstrate the capabilities of the discontinuous Galerkin spectral element method for high order accuracy computation of gas *** internal flow field of a natural gas injector for bivalent combustion engines is investigated under its operating *** simulations of the flow field and the aeroacoustic noise emissions were in a good agreement with the experimental *** tested several shockcapturing techniques for the discontinuous Galerkin *** on the validated framework,we analyzed the development of the supersonic jets during different opening procedures of a compressed natural gas *** results suggest that a more gradual injector opening decreases the noise emission.

关键词： Galerkin 应用程序谱元法动态仿真工业气体不连续天然气喷射器内部流场

嵌入式AI与MEMS传感器塑造未来,开启全新视野

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传感器世界 2023年第10期29卷 40-41页

作者：皇甫杰 bosch Sensortec gmbh

博世集团于1886年成立,由罗伯特·博世先生创立,发展到今天已有137年的历史,主要涉及四大业务领域:第一是汽车和智能交通领域,也是最大的一块领域;第二是工业技术领域;第三是能源与建筑技术领域;最后一个是消费品领域。众所周知,博世是... 详细信息

博世集团于1886年成立,由罗伯特·博世先生创立,发展到今天已有137年的历史,主要涉及四大业务领域:第一是汽车和智能交通领域,也是最大的一块领域;第二是工业技术领域;第三是能源与建筑技术领域;最后一个是消费品领域。众所周知,博世是汽车半导体巨头,汽车里面的各种零部件,包括底盘系统等大量用到博世的模块或者传感器。

关键词：消费品领域 MEMS传感器底盘系统博世智能交通领域嵌入式零部件

Fusing MEMS technology with lab-on-chip: nanoliter-scale silicon microcavity arrays for digital DNA quantification and multiplex testing

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Microsystems & Nanoengineering 2020年第1期6卷 345-356页

作者： Daniel Podbiel Franz Laermer Roland Zengerle Jochen Hoffmann Robert bosch gmbh Corporate Sector ResearchMicrosystems and NanotechnologiesRobert-Bosch-Campus 171272 RenningenGermany IMTEK-Department of Microsystems Engineering University of Freiburg Georges-Koehler-Allee 10379110 FreiburgGermany

We report on the development of a microfluidic multiplexing technology for highly parallelized sample analysis via quantitative polymerase chain reaction(PCR)in an array of 96 nanoliter-scale microcavities made from *** PCR array technology features fully automatable aliquoting microfluidics,a robust sample compartmentalization up to temperatures of 95°C,and an application-specific prestorage of reagents within the 25nl *** here presented hybrid silicon–polymer microfluidic chip allows both a rapid thermal cycling of the liquid compartments and a real-time fluorescence read-out for a tracking of the individual amplification reactions taking place inside the *** demonstrate that the technology provides very low reagent carryover of prestored reagents<6×10^(−2) and a cross talk rate<1×10^(−3) per PCR cycle,which facilitate a multi-targeted sample analysis via geometric ***,we apply this PCR array technology to introduce a novel digital PCR-based DNA quantification method:by taking the assay-specific amplification characteristics like the limit of detection into account,the method allows for an absolute gene target quantification by means of a statistical analysis of the amplification results.

关键词： liter testing apply

The push-pull principle:an electrostatic actuator concept for low distortion acoustic transducers

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Microsystems & Nanoengineering 2022年第6期8卷 181-194页

作者： Bert Kaiser Hermann A.G.Schenk Lutz Ehrig Franziska Wall Jorge M.Monsalve Sergiu Langa Michael Stolz Anton Melnikov Holger Conrad David Schuffenhauer Harald Schenk Fraunhofer Institute for Photonic Microsystems IPMS DresdenGermany Arioso Systems gmbh since Sep.1st 2022:BOSCH Sensortec GmbHDresdenGermany Chair of Micro and Nano Systems Brandenburg University of Technology Cottbus-SenftenbergCottbusGermany

Electrostatic actuators are of particular interest for microsystems(MEMS),and in particular for MEMS audio transducers for use in advanced true wireless *** are attractive because of their typically low electrical capacitance and because they can be fabricated from materials that are compatible with standard complementary metal-oxide semiconductor(CMOS)*** high audio performance and in particular low harmonic distortion(THD)the implementation of the push-pull principle provides strong *** an arrangement of three electrodes in a conjunct moving configuration on a beam,we demonstrate here for the first time a balanced bending actuator incarnating the push-pull principle operating at low *** first design already exhibits a harmonic distortion as low as 1.2%at 79 dB using a signal voltage of only 6 V_(p) and a constant voltage of only±10 V_(dc) in a standard acoustic measurement ***,exceeding our previously reported approach in all three key performance indications at the same *** expect that our novel electrode configurations will stimulate innovative electrostatic actuator developments for a broad range of *** this paper we report the basic theory,the fabrication and the performance of our novel actuator design acting as an audio transducer.

关键词： distortion push electrostatic

Fault Diagnosis of Nonlinear Systems Using Structured Augmented State Models

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International Journal of Automation and computing 2007年第2期4卷 141-148页

作者： Jochen Aβfalg Frank Allgwer Robert bosch gmbh Corporate Sector Research70442 StuttgartGermany University of Stuttgart Institute for Systems Theory and Automatic Control70550 StuttgartGermany

This paper presents an internal model approach for modeling and diagnostic functionality design for nonlinear systems operating subject to single- and multiple-faults. We therefore provide the framework of structured augmented state models. Fault characteristics are considered to be generated by dynamical exosystems that are switched via equality constraints to overcome the augmented state observability limiting the number of diagnosable faults. Based on the proposed model, the fault diagnosis problem is specified as an optimal hybrid augmented state estimation problem. Sub-optimal solutions are motivated and exemplified for the fault diagnosis of the well-known three-tank benchmark. As the considered class of fault diagnosis problems is large, the suggested approach is not only of theoretical interest but also of high practical relevance.

关键词： Fault diagnosis nonlinear systems hybrid estimation.

Stability of Ni/SiO2-ZrO2 catalysts towards steaming and coking in the dry reforming of methane with carbon dioxide

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Frontiers of Chemical Science and Engineering 2016年第2期10卷 281-293页

作者： Bettina Stolze Juliane Titus Stephan A. Schunk Andrian Milano Ekkehard Schwab Roger Glaser Institute of Chemical Technology Universitat Leipzig Lirmestr. 3 04103 Leipzig Germany hte gmbh Kurpfalzring 104 69123 Heidelberg Germany BASF SE Carl-Bosch-Straβe 38 67056 Ludwigshafen Germany

Ni/SiO2-ZrO2 catalysts with Ni loadings of 1 to 13 wt-% were prepared, characterized by elemental analysis, X-ray diffraction, N2 sorption, temperature programmed oxidation, temperature programmed reduc- tion, and tested for their activity and stability in the dry reforming of methane with carbon dioxide at 850 ℃, gas hourly space velocity of 6000 and 1800 h^-1 and atmo- spheric pressure. The SiO2-ZrO2 support as obtained through a simple and efficient sol-gel synthesis is highly porous （ABET = 90 m^·g^-1, dp= 4.4 nm） with a homogeneously distributed Si-content of 3 wt-%. No loss of Si or formation ofmonoclinic ZrO2, even after steaming at 850 ℃ for 160 h, was detectable. The catalyst with 5 wt-% Ni loading in its fully reduced state is stable over 15 h on-stream in the dry reforming reaction. If the catalyst was not fully reduced, a reduction during the early stages of dry reforming is accompanied by the deposition of up to 44 mg· g^-1 carbon as shown by experiments in a magnetic suspension balance. Rapid coking occurs for increased residence times and times-on-stream starting at 50 h. The Ni loading of 5 wt-% on SiO2-ZrO2 was shown to provide an optimal balance between activity and coking tendency.

关键词： Ni/SiO2-ZrO2 synthesis gas dry reforming,coking steaming