Road vehicle-induced vibration control of microelectronics facilities

A hybrid control platform is investigated in this paper to mitigate microvibrations to a group of vibration-sensitive equipment installed in a microelectronics facility subject to nearby road vehicle-induced horizontal and vertical ground motions. The hybrid control platform, on which microelectronics equipment is installed, is mounted on a building floor through a series of passive mounts and controlled by hydraulic actuators in both horizontal and vertical directions. The control platform is an elastic body with significant bending modes of vibration, and a sub-optimal control algorithm is used to manipulate the hydraulic actuators with actuator dynamics included. The finite element model and the equations of motion of the coupled platform-building system are then established in the absolute coordinate to facilitate the feedback control and performance evaluation of the platform. The horizontal and vertical ground vibrations at the base of the building induced by nearby moving road vehicles are assumed to be stationary random processes. A typical three-story microelectronics building is selected as a case study. The case study shows that the vertical vibration of the microelectronics building is higher than the horizontal. The use of a hybrid control platform can effectively reduce both horizontal and vertical microvibrations of the microelectronics equipment to the level which satisfies the stringent microscale velocity requirement specified in the Bolt Beranek & Newman (BBN) criteria.

SYNTHESIS AND APPLICATIONS OF NANOMATERIALS IN MICROELECTRONICS

The technology boom in microelectronics and telecommunication industry has presented a unique opportunity for nanomaterials. Nanomaterials enable the creation of unique devices, components and systems through the control of matter on a near molecular level. These new devices, components and systems will exhibit novel physical, chemical, mechanical, electrical, optical and biological properties. The synthesis processes of nanomaterials are reviewed and the applications of nanomatorials in microelectronics are discussed in this paper.

Device Physics Research for Submicron and Deep Submicron Space Microelectronics Devices and Integrated Circuits

Device physics research for submicron and deep submicron space microelectronics devices and integrated circuits will be described in three topics.1.Thin film submicron and deep submicron SOS / CMOS devices and integrated circuits.2.Deep submicron LDD CMOS devices and integrated circuits.3.C band and Ku band microwave GaAs MESFET and III-V compound hetrojunction HEM T and HBT devices and integrated circuits.

Mozart Chocolates and Microelectronics,Lipizzaner Stallions and Lightweight Construction.Less well-known:Austria Is A Top Research Location

Whoever thinks of Empress Sisi,Sacher cake,skiing or the Vienna Opera Ball first in connection with Austria is not wrong at all,but this individual does overlook one important factor:Austria is actually an extremely innovative and profitable business location.In addition to highly qualified and motivated employees,Austria always boasts the highest density of world market leaders in relation to the number of inhabitants.

The Challenges of Microelectronics for the Future Digital Society: The Roles of Thin Film Technologies and of the Higher Education

The new digital society is based on Internet of Things (IoT) and related connected objects are becoming more prevalent around the world. This evolution implies innovation in many areas of technology, the heart of which is microelectronics. Connected objects involve many technological components and functions that are directly dependent of the microelectronics capabilities. If the perspectives are exciting, several challenges are appearing. The first is related to the energy consumption of all these objects, which will become enormous by 2030, and unrealistic by 2040. The second is human resources concern. The future engineers and PhD will have many obstacles to overcome. A way to face these challenges is to involve more and more new thin film technologies that must be combined with VLSI ones, and to better train students to this domain with enough know-how and with a large spectrum of knowledge suitable for multidisciplinary applications. The French national network for Higher Education in microelectronics has adopted this strategy. After presentation of the challenges, this paper deals with the innovative activities of the French network focused on thin film technologies, in order to face the challenges in a short future.

A Study of Lateralized Cognitive Processes in Upper-Division Electrical Engineering Students’: Correlating Written Language Functions with Analytical Reasoning in Microelectronics

The human brain is asymmetrical in function, with each of its two hemispheres being somewhat responsible for distinct cognitive and motor tasks, to include writing. It stands to reason that engineering students who have established entrance into their upper-division programs will have demonstrated cognitive proficiency in math and logical operations, abstract and analytical reasoning and language usage, to include writing. In this study the question was asked: is there a correlation between an upper-division electrical engineering students’ analytical reasoning ability and their descriptive writing ability? Descriptive writing is taken here to mean a students’ ability to identify key physical aspects of a mathematical model and to express—in words—a concise and well-balanced description that demonstrates a deep conceptual understanding of the model. This includes more than a description of the variables or the particular application to an engineering problem;it includes a demonstrated recognition of the basic physics that govern the model, certain limitations (idealizations) inherent in the model, and an understanding of how to make practical experimental measurements to verify the governing physics in the model. A student at this level may demonstrate proficiency in their analytical reasoning skills and hence be capable of correctly solving a given problem. However, this does not guarantee that the same student is skilled in associating equations with their physical meaning on a deep conceptual level or in understanding physical limitations of the equation. Consequently, such a student may demonstrate difficulty in mapping their comprehension of the model into written language that demonstrates a sound conceptual understanding of the governing physics. The findings represent a sample of two independent class sections of Electrical and Computer Engineering junior’s first course in Microe-lectronic Devices and Circuits during fall semesters 2012 and 2013 at a private mid-size university in NW Oregon. A total of three exams were administered to each of the 2012/2013 groups. Correlations between exam scores that students achieved on their descriptive writing of microelectronics phenomena and their analytical problem-solving abilities were examined and found to be quite significant.

Progress in Space Microelectronics

Research and development work of space microelectronics of China startedin 1965 as part of the space development program of China. Jointcoordination administered by the Ministry of Aero-Space results in success of China’s first generation of space program including the launching ofcommunication satellite. It is to be emphasized that during this phase of Rand D for space microelectronics (1965～1978), we were completely iso-

Tianma Microelectronics Co.Ltd.

Tianma Microelectronics Co.Ltd...

Best Practices for Thermal Modeling in Microelectronics with Natural Convection Cooling: Sensitivity Analysis

A detailed sensitivity study was carried out on various key parameters from a high precision numerical model of a microelectronic package cooled by natural convection, to provide rules for the thermal modeling of microelectronic packages subjected to natural convection heat transfer. An accurate estimate of the junction temperature, with an error of less than 1˚C, was obtained compared to the experimental data for the vertical and horizontal orientations of the test vehicle in the JEDEC Still Air configuration. The sensitivity study showed that to have an accurate estimate of the temperature, the following elements should be present in the thermal model: radiation heat transfer in natural convection cooling;a computational fluid dynamics analysis to find realistic convection coefficients;detailed models of the high conductivity elements in the direction of the heat flow towards the environment;and finally precise values for the thicknesses of layers and the thermal properties of the substrate and the printed circuit board.

Practice and Exploration of Mixed Teaching of Microelectronics

The mixed teaching mode plays an increasingly important role in stimulating students’interest and autonomy in learning,and strengthening students’learning ability.The full integration of mixed teaching mode and microelectronics teaching can not only achieve the teaching objectives smoothly,but also enable students to deepen their understanding and memory of relevant knowledge with the help of diversified and interesting teaching methods.Therefore,this paper takes the microelectronics course as an example to practice and explore the effective ways to carry out the mixed teaching mode.Teachers should not make full use of online and offline teaching resources,but also actively improve the traditional assessment systems.Through the continuous improvement of the practicality of online and offline teaching content,an easy-to-complex teaching method with a coherent content structure can be adopted to stimulate students’learning motivation,improve their enthusiasm for participation,and lay a solid foundation for further improvements in the teaching of microelectronics technology.

Call for Papers Special Section on Microelectronics

The publication of Tsinghua Science and Technology was started in 1996. Since then, it has been an international academic journal sponsored by Tsinghua University and published bimonthly. This journal aims at presenting the state-of-art scientific achievements in computer science and other IT fields.

Call for Papers Special Section on Microelectronics

The publication of Tsinghua Science and Technology was started in 1996. Since then, it has been an international academic journal sponsored by Tsinghua University and published bimonthly. This journal aims at presenting the state-of-art scientific achievements in computer science and other IT fields.

Neural function rebuilding on different bodies using microelectronic neural bridge technique

A microelectronic circuit is used to regenerate the neural signals between the proximal end and the distal end of an injured nerve.An experimental scheme is designed and carried out to verify the feasibility of the so-called microelectronic neural bridge（MNB）.The sciatic signals of the source spinal toad which are evoked by chemical stimuli are used as source signals to stimulate the sciatic of the controlled spinal toad.The sciatic nerve signals of the source spinal toad,the regenerated sciatic signals in the controlled spinal toad,and the resulting electromyography（EMG）signals associated with the gastrocnemius muscle movements of the controlled spinal toad are displayed and recorded by an oscilloscope.By analyzing the coherence between the source sciatic nerve signals and the regenerated sciatic nerve signals and the coherence between the regenerated nerve signals and the EMG signals,it is proved that the regenerated sciatic nerve signals have a relationship with the source sciatic nerve signals and control shrinkage of the leg of the controlled toad.

Thermionic electron emission in the 1D edge-to-edge limit

Thermionic emission is a tunneling phenomenon,which depicts that electrons on the surface of a conductor can be pulled out into the vacuum when they are subjected to high electrical tensions while being heated hot enough to overtake their work functions.This principle has led to the great success of the so-called vacuum tubes in the early 20 th century.To date,major challenges still remain in the miniaturization of a vacuum channel transistor for on-chip integration in modern solid-state integrated circuits.Here,by introducing nano-sized vacuum gaps(~200 nm)in a van der Waals heterostructure,we successfully fabricated a one-dimensional(1 D)edge-to-edge thermionic emission vacuum tube using graphene as the filament.With the increasing collector voltage,the emitted current exhibits a typical rectifying behavior,with the maximum emission current reaching 200 p A and an ON-OFF ratio of 10;.In addition,it is found that the maximum emission current is proportional to the number of the layers of graphene.Our results expand the research of nano-sized vacuum tubes to an unexplored physical limit of 1 D edge-to-edge emission,and hold great promise for future nano-electronic systems based on it.

DESIGN AND RESEARCH OF QUASI-PLANAR SELF-ALIGNED SILICON AVALANCHE ELECTRON EMISSION ARRAY

The device structure and technical processings of quasi-planar self-aligned silicon avalanche electron emission array arc introduced. The processing step at the edge of electron emission region is about 10nm only and the width of self-aligned current channel of shallow As implantation is about 3μm. Its I-V characteristics show a larger linear region and lower series resistance than that of the previous silicon avalanche electron emission devices. Some of the electron emission characteristics are also discussed in this paper.

NOVEL “CATHODE-ON-MEMBRANE” VME PRESSURE SENSOR

This article proposes a novel "cathode-on-membrane" vacuum microelectronic (VME)pressure sensor. Compared with conventional VME pressure sensors, the package process of the new structured sensor is easier to control, and therefore it enable greater potential of nass production and high productivity. The properties of the new sensor have been theoretically investigated by computer simulations; the practical structure has been designed and fabricated; and the package technique has been studied.

ICT in Chile at the Beginning of the Fourth Industrial Revolution

This paper shows the current status of companies in the information and communication technology(ICT)sector in Santiago,Chile.It presents the results of interviews with 13 ICT companies,reviewing structural elements that determine the development of the sector.For this purpose,a qualitative analysis of that interviewed group is carried out to identify their different linkages and work dynamics.This sector has a great capacity for stimulating innovative development throughout the national economy,a key element in the paradigmatic change that the so-called fourth industrial revolution imposes on us.

A Proposed Exercise to Reinforce Abstract Thinking for Upper-Division Computer and Electrical Engineering Students: Modeling a High-Speed Inverter Using Cognitive Representations and Abstract Algebra

In mathematics, physics, and engineering, abstract concepts are an indispensable foundation for the study and comprehension of concrete models. As concepts within these fields become increasingly detached from physical entities and more associated with mental events, thinking shifts from analytical to conceptual-abstract. Fundamental topics taken from the abstract algebra (aka: modern algebra) are unquestionably abstract. Historically, fundamental concepts taught from the abstract algebra are detached from physical reality with one exception: Boolean operations. Even so, many abstract algebra texts present Boolean operations from a purely mathematical operator perspective that is detached from physical entities. Some texts on the abstract algebra introduce logic gate circuits, but treat them as perceptual symbols. For majors of pure or applied mathematics, detachments from physical entities is not relevant. For students of Computer and Electrical Engineering (CpE/EE), mental associations of Boolean operations are essential, and one might argue that studying pure Boolean axioms are unnecessary mental abstractions. But by its nature, the CpE/EE field tends to be more mentally abstract than the other engineering disciplines. The depth of the mathematical abstractions that we teach to upper-division CpE/EE majors is certainly up for questioning.

Cutting-edge technologies for diagnosis and monitoring of snoring in children

Snoring is a very common problem in children and may be an indication of obstructive sleep apnea(OSA). Appropriate diagnosis is of importance due to detrimental effects of OSA. Polysomnography is considered the gold standard for the diagnosis of OSA. However, it is impractical for several reasons and this is why other tests have been developed as alternatives to formal polysomnography(PSG) for the assessment of children with snoring. In this mini-review basic features of PSG as well as alternative tests are presented and future perspectives are provided in addition to current guideline for the diagnosis and monitoring of childhood snoring. The aim of this review is to highlight briefly currently developed technologies that seem promising for the evaluation of snoring.

High-Resolution Radiometer for Remote Sensing of Solar Flare Activity from Low Earth Orbit Satellites

Solar flares, intense bursts of radiation, can disrupt the atmosphere and potentially affect communication, navigation and electrical systems. A newly developed miniaturised microwave radiometer used on a space-borne platform should offer astronomers unprecedented understanding of the largest explosive phenomena in our solar system. In this paper the activity and results of the EU funded research project FLARES are presented. Objective of FLARES has been the study, analysis and design of millimetre-wave system-on-chip (SoC) radiometers for space-borne detection of solar flares. Thanks to the proposed methodology, the power consumption and encumbrance (volume, weight) of the instrument can be sensibly reduced when compared to the devices currently in operation for observing and studying solar flares. In particular, the proposed SoC Dicke radiometer can achieve a ten-time better resolution. This in turn, allows detecting solar flares having relatively low intensity, about 100 times lower when compared to the flares currently detected by the existing systems, owing to space-borne operations and the microchip-level miniaturization through silicon technology under space qualification.