Development Of Microelectronics Research Articles

Modern technologies of early diagnosis of wound infection

The article presents an analysis of the data of modern literature devoted to the study of early diagnosis of wound infection. It is well known that wound healing is a very complex and dynamic mechanism of wound re-epithelialization. At the same time, the normal microflora of the skin plays an important function for maintaining homeostasis and the formation of the skin. There are about 1000 species of microorganisms belonging to the normal flora of human skin and do not cause any harm to healthy people. At the same time, there are microorganisms that, when they enter the wound, lead to the development of infectious complications of wounds as a result of a violation of the integrity of the skin. They include both gram-positive (Staphylococcus aureus, Staphylococcus epidermidis) and gram-negative bacteria (Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, Enterobacter spp., Morganella spp., etc.). Early detection of these microorganisms will contribute to timely and high-quality treatment of wound infection. Currently, there are certain conditions that limit the use of microbiological research methods used to establish a clinical diagnosis of wound infection (long duration, labor intensity, required level of qualification of specialists, etc.). This dictates the need to develop new, fast and easy-to-use methods for diagnosing wound infection. To this end, a group of researchers from Russia (Skolkovo Institute of Science and Technology) and the USA (University of Texas at Austin) have recently developed wearable sensors for the diagnosis of wound infection. These sensors can be embedded in wound dressings and are able to detect certain biomarkers indicating the presence of wound infection. Among these biomarkers, pH and uric acid are the most commonly used, but there are many others (lactic acid, oxygenation, inflammatory mediators, bacterial metabolites or the bacteria themselves). Currently, the development of microelectronics, the emergence of biochemical sensors, active microfluidics and painless microneedles have led to the creation of new generations of wearable biosensors that provide completely new opportunities in the fight against wound infection.

Hybrid effect on mechanical and thermal performance of copper matrix composites reinforced with SiC whiskers

The rapid development of micro-electronics has a growing demand on the heat dissipation performance of devices, especially thermal management materials. However, recent researches focus on the improvement of single ability, such as thermal or mechanical properties. Herein, a strategy that simultaneously improves thermal and mechanical performance of thermal manager material was proposed, which was achieved by preparing Cu-SiCw composites via the co-electrodeposition technology. The influence of electroplating parameters, such as temperature, current density and reinforcement contents, on the microstructure evolution, mechanical and thermal conductivity were investigated systematically. The fabricated SiCw composite displayed excellent shear strength up to 420 MPa, which is resulted from the Orowan strengthening and load transferring. Additionally, the thermal conductivity of 340 W/(m·K) was obtained, owing to the uniform distribution of whiskers and good interface between the Cu matrix and whiskers. Therefore, the presented work provided an effective method for fabricating comprehensive thermal-mechanical properties and homogeneous heat dissipation capacity Cu-SiCw composites and paved the way for the practical application in the field of the connector between the power devices and heat sinks.

A review of microfabrication approaches for the development of thin, flattened heat pipes and vapor chambers for passive electronic cooling applications

With the rapid development of microelectronics and the telecommunication industry, a variety of high performance, portable and slim electronic devices have become available. Miniaturization of devices and increased packing density of electronics can generate “hot spots” i.e. a high heat flux on a small area. Thus, in such devices the heat management requirements go beyond the limits of typical approaches and the development of miniaturized, high-performance thermal management concepts to cool high-performance, compact electronic devices is urgently required. To this direction, micro and nanofabrication methods can provide solutions in both miniaturizing existing concepts of passive cooling as well as in improving their performance. In this review, we start by introducing the most commonly used metrics used to evaluate the performance of passive cooling devices (i.e. vapor chambers and flattened heat pipes) together with the most prominent performance limitations. Then, in the main part, we present state of the art examples of microfabricated, thin vapor chambers and flattened heat pipes on rigid substrates (i.e. using metals and silicon), but also vapor chambers on thin and flexible polymeric or composite materials. Finally, the main conclusions and the steps which should be followed to further enhance the performance of such devices are summarized in the conclusions and future perspectives section.

Morphological, electrical, and electromagnetic characterization of nanometric films of Cu and Ni and their combination in bilayers

Modern developments in telecommunication and microelectronics have resulted in spurious radiation, which can promote electromagnetic interference and environmental pollution. To minimize this problem, this work studied nanometric metallic films (65 nm/layer) based on Cu and Ni and their combinations in bilayers deposited on a polyethylene terephthalate substrate by magnetron sputtering. Field emission gun scanning electron microscopy analyses showed that the films have different morphological textures, due to the processing parameters and the free energy of the metals. Electrical measurements by the 4-point method and dielectric spectroscopy showed that the films have low conductivity values, due to oxides formed on the surfaces of the films and defects. X-ray diffraction confirmed the formation of metallic oxides in the films. Electromagnetic characterization (8.2-12.4 GHz) of the monolayer films showed poor performance. Meanwhile, the bilayer films (Ni/Cu and Cu/Ni) showed different behaviors with reflection and absorption contributions. Attenuation values close to 95 % for the Cu/Ni film were obtained.

Dual-Effect Coupling for Superior Dielectric and Thermal Conductivity of Polyimide Composite Films Featuring "Crystal-Like Phase" Structure.

To match the increasing miniaturization and integration of electronic devices, higher requirements are put on the dielectric and thermal properties of the dielectrics to overcome the problems of delayed signal transmission and heat accumulation. Here, a 3D porous thermal conductivity network is successfully constructed inside the polyimide (PI) matrix by the combination of ionic liquids (IL) and calcium fluoride (CaF2 ) nanofillers, motivated by the bubble-hole forming orientation force. Benefiting from the 3D thermal network formed by IL as a porogenic template and "crystal-like phase" structures induced by CaF2 - polyamide acid charge transfer, IL-10 vol% CaF2 /PI porous film exhibits a low permittivity of 2.14 and a thermal conductivity of 7.22 W m-1 K-1 . This design strategy breaks the bottleneck that low permittivity and high thermal conductivity in microelectronic systems are difficult to be jointly controlled, and provides a feasible solution for the development of intelligent microelectronics.

High uncertainty aware localization and error optimization of mobile nodes for wireless sensor networks

<p>The localization of mobile sensor nodes in a wireless sensor network (WSN) is a key research area for the speedy development of wireless communication and microelectronics. The localization of mobile sensor nodes massively depends upon the received signal strength (RSS). Recently, the least squared relative error (LSRE) measurements are optimized using traditional semidefinite programming (SDP) and the location of the mobile sensor nodes was determined using the previous localization methods like least squared relative error and semidefinite programming (LSRE-SDP), and approximate nonlinear least squares and semidefinite programming (ANLS-SDP). Therefore, in this work, a novel high uncertainty aware-localization error correction and optimization (HUA-LECO) model is employed to minimize the aforementioned problems regarding the localization of mobile sensor nodes and enhance the performance efficiency of root mean square error (RMSE) results. Here, the position of target mobile sensor nodes is evaluated based on the gathered measurements while discarding faulty data. Here, an iterative weight updation approach is utilized to perform localization based on Monte Carlo simulations. Simulation results show significant improvement in terms of RMSE results in comparison with traditional LSRE-SDP and ANLS-SDP methods under high uncertainty.</p>

Current status and applications of photovoltaic technology in wearable sensors: a review

The rapid development of wearable sensor technology can be attributed to developments in materials, microelectronics, fabrication, communication systems, and Artificial Intelligence (AI). The use of wearable sensors enables continuous acquisition and monitoring of the pathophysiological parameters of a person in real time. The global market for health-related wearables has experienced significant growth, particularly in response to the COVID-19 pandemic. A wearable sensor module is comprised of various components, including a powering unit, sensor(s), acquisition unit, communication unit, and processing unit. The non-fluctuating power source with a long life is of utmost significance to the continuous and real-time operation of a wearable sensor. A wearable device can be powered by a rechargeable battery, such as a lithium-ion battery, which can be charged from a standard power source but requires regular recharging after depletion and has a negative environmental impact. This necessitates using green renewable energy sources like photovoltaic cells, piezoelectric generators, wind energy converters, and thermoelectric generators for powering wearable sensor modules. The photovoltaic cell that converts photonics into electrical energy is deemed a viable green energy source for wearable sensor modules. This article reviews the progress and application of photovoltaic technology in wearable sensor modules.

Close-Range Transmission Line Inspection Method for Low-Cost UAV: Design and Implementation

With the rapid development of microelectronics, unmanned aerial vehicles (UAVs) for electric inspection tasks have become popular. Among these tasks, transmission line inspections are more complicated than component and tower inspections owing to the small size, poor functionality, and severe magnetic field interference of transmission lines. Existing solutions invariably use high-precision devices and maintain safety distances during inspections. However, capturing detailed transmission line information over long distances is challenging. Moreover, sophisticated equipment implies high costs and considerable value risks. This work proposes a method using RGB cameras and mm-wave radar to accomplish close-range transmission line inspections. A heading correction and two correction modules address waypoint mission mismatch and wind interference during tracking. In addition, adaptive complementary fusion is designed to solve anomaly identification. Finally, the proposed method validated in a 10 kV transmission line environment demonstrates successful close-range inspection while acquiring high-definition (HD) images. The validation results prove the practical feasibility of the proposed low-cost transmission line inspection method, which is of great significance for reducing inspection costs and promoting the popularization of UAV inspections.

Current Trends and Promising Electrode Materials in Micro-Supercapacitor Printing.

The development of scientific and technological foundations for the creation of high-performance energy storage devices is becoming increasingly important due to the rapid development of microelectronics, including flexible and wearable microelectronics. Supercapacitors are indispensable devices for the power supply of systems requiring high power, high charging-discharging rates, cyclic stability, and long service life and a wide range of operating temperatures (from -40 to 70 °C). The use of printing technologies gives an opportunity to move the production of such devices to a new level due to the possibility of the automated formation of micro-supercapacitors (including flexible, stretchable, wearable) with the required type of geometric implementation, to reduce time and labour costs for their creation, and to expand the prospects of their commercialization and widespread use. Within the framework of this review, we have focused on the consideration of the key commonly used supercapacitor electrode materials and highlighted examples of their successful printing in the process of assembling miniature energy storage devices.

Highly thermal conductive and flame retardant poly(vinyl alcohol) film with synergistic alignments of boron nitride nanosheets/Ti3C2Tx MXene for thermal interface materials

With the development of microelectronics and flexible wearable electronic devices, poly(vinyl alcohol) (PVA) based thermal interface materials (TIMs) have received much attention. However, poor heat dissipation and high flammability have emerged as the key issues that restrict their application. In this work, the directional alignment of phytic acid (PA) modified boron nitride nanosheets (BNNS) and Ti3C2Tx MXene in PVA matrix was achieved by ice-templated assembly, which simultaneously enhanced the flame retardancy and thermal conductivity of PVA composite films (PVA/BTx). Owing to the synergistic effect between oriented BNNS and Ti3C2Tx MXene on forming the thermally conductive network within PVA matrix, the in-plane thermal conductivity of PVA/BTx-30 composite film was increased to 8.54 W m−1 K−1, much higher than that of PVA film (0.30 W m−1 K−1). Meanwhile, the heat dissipation process of PVA films applied as TIMs was simulated, which showed that PVA/BTx-30 films exhibited excellent thermal conduction and significantly decreased the operation temperature of electronic devices. Additionally, the peak heat release rate (PHRR) and total heat release (THR) of PVA/BTx-30 films were reduced by 60.3% and 62.0%, respectively, showing good flame retardancy. Importantly, the flexible Ti3C2Tx nanosheets further enhanced the mechanical properties of PVA/BTx composite films. Therefore, this work provides an effective method for the preparation of high thermal conductivity and flame retardant composite materials, which has important potential applications in the microelectronics industry.

New Insights into the Microchannel Heat Sink with Cantor Fractal Structure by Using Simulated Annealing Algorithm

Efficient microchannel cooling is the key to the development of microelectronics. The key to solving this problem is the geometry of the microchannel heat sink and the thermophysical properties of the fluid. We combined the cantor fractal principle with the microchannel heat sink to design a new type of three-dimensional microchannel structure. Thermal resistance is treated as a single objective function, and the simulated annealing process is utilized to minimize it and achieve satisfying results. When the Reynolds number (Re)[Formula: see text]100, the aspect ratio of the microchannel entrance ([Formula: see text]), the aspect ratio of the Cantor fractal baffle ([Formula: see text] and the ratio of the width of the entrance of the microchannel to the length of the mixing unit ([Formula: see text] are optimized. The important factors that affect the thermal resistance of the microchannel are the size and spacing of the baffle. Then the pressure drop and heat transfer under different Res were analyzed. The study found that the structure of the groove and baffle based on the cantor fractal principle will cause chaotic flow and greatly enhance the heat transfer performance. Compared with the reference microchannel, the comprehensive heat transfer coefficient PEC is greater than 1, the thermal resistance is reduced by 19.82%.

Electrical and Mechanical Behavior of Aerosol Jet–Printed Gold on Alumina Substrate for High‐Temperature Applications

There is a growing interest in the development of microelectronics that can perform reliably and robustly at temperatures above 300 °C. Such devices require stable thermal properties, low thermal drift, and thermal cycling resistance. Conventional hybrid circuit technology demonstrates high‐temperature packages, but the high costs and lead time are significant drawbacks. In contrast, additive manufacturing processes, including aerosol jet printing (AJP), offer cost and time benefits, as well as 3D structures and embedded features. However, the properties and reliability of additive packaging materials at extreme temperatures are not well known. Herein, the reliability at temperatures up to 750 °C in terms of electrical performance and mechanical strength of aerosol jet printed gold thick films onto ceramic substrates are assessed. Thermal coefficient of resistance of printed gold films is measured. The electrical resistance stability and leakage current of printed gold structures are also characterized during over 100 h of aging at temperatures up to 750 °C. Finally, the mechanical adhesion strength of the printed gold films is evaluated after aging for 100 h at temperatures up to 750 °C. The adhesion of the printed gold to the ceramic substrates remains high after aging, very stable resistances and minimal leakage currents have been observed.

Smart-Systems for Precision Agriculture, Environmental Protection and Healthcare

Appearance of innovative tools of informatics in the world is determined by development of information-communication technology, microelectronics, sensor and biosensor technologies. Spreading of these technologies on precision agriculture, environmental protection and health care gives opportunity to create smart fields, gardens, greenhouses, forests and parks, and also smart health monitors, which estimate the health state of person as in rehabilitation, so in emergency situations. Results of research of authors in the development of new information technologies and creation of main components of the smart systems for different purposes on this base are shows in this paper. Main requirements for knowledge bank for precision agriculture and ecological monitoring are defined. Main principles of creating knowledge bank on base of requirements are proposed. The typical smart system models and their development stages are considered. Structure of wireless multilevel networks for the estimation of state of biological objects of different origin and their nodes are described. Developed sensor networks and smart systems for agriculture are considered. Structure of proposed smart system for agriculture and ecological monitoring is given. Approaches for chlorophyll fluorescence induction curves analysis are studied. Results of network testing for the estimation of the autonomous work time of network nodes and possible errors are given. Wireless sensor network and smart system for remote medical monitoring are described. Diagnostic smart systems for estimation of quality of life are considered. Medical communicator, computer device on base of tablet computer, was used for their development. The short form of Survey Instrument (SF-36) for life quality estimation and abnormal uterine bleeding questionnaire, which was developed in State Scientific Institution "Center for Innovative Medical Technologies of the National Academy of Sciences of Ukraine", were embedded in communicator. STEPS questionnaire which was designed for epidemiological monitoring of the prevalence of noncommunicable diseases and their risk factors in the target subpopulations could be added to communicator. Development of smart systems for estimation of quality of life and prevalence of noncommunicable diseases was made in cooperation with R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology NAS of Ukraine (department of research management and innovation), Chebotarev Institute of Gerontology of the National Academy of Medical Sciences of Ukraine, Center for Innovative Medical Technologies of the National Academy of Sciences of the Ukraine. Keywords: wireless sensor network, precision agriculture, chlorophyll fluorescence induction, express-diagnostics of plant state, quality of life, SF-36.

Single-dislocation ultraviolet light emission

Micro-nano ultraviolet light sources have recently attracted great attention due to their promising applications in future quantum display, photoelectric detection sensors, biomedical devices, and so on. Design of ultraviolet light sources with smaller size, stronger emission intensity, and higher integration, are the key aspects for the development of high-performance micro-nano ultraviolet devices. Here, we demonstrate that unidirectional threading dislocation arrays in an AlN thin film can emit ultraviolet light with wavelength of ∼ 317 nm. The density of AlN dislocations is ∼ 4 × 1010 cm−2, and the light emission intensity of AlN dislocations is comparable to the intrinsic emission of the AlN thin film. By combining aberration-corrected transmission electron microscopy, atomic-resolution valence electron energy-loss spectroscopy, and first-principles calculations, the atomic and electronic structures and the band gaps of the AlN threading dislocations are determined. It is found that the AlN threading dislocations are comprised of edge, screw, and mixed dislocations. All the AlN dislocations exhibit smaller band gaps compared to the AlN bulk due to the increase of the Al-N bond length at the dislocation cores. The dangling bonds of Al and N at the edge dislocations, Al-Al and NN bonds at the screw dislocations cause the defect states in the band gaps. This study not only has clarified the atomic origin of dislocation nano-optics, but also will encourage the development of microelectronics and optoelectronic devices based on dislocation ultraviolet light emission.

ПРО КОНЦЕПЦІЮ ОРГАНІЗАЦІЇ БОРОТЬБИ З БЕЗПІЛОТНИМИ ЛІТАЛЬНИМИ АПАРАТАМИ В МІСЦЯХ ЗБЕРІГАННЯ ЗАСОБІВ УРАЖЕННЯ

The history of small-sized, low-speed unmanned aerial vehicles, in contrast to the history of unmanned aerial vehicles, is not counted for half a century, but only for two dozen years. The first publications devoted to small-sized and low-speed unmanned aerial vehicles were published after 2008. The number of publications on the specified subject significantly increased in 2017-2018. It is during this period that military operations using small-sized and low-speed unmanned aerial vehicles become widespread. As an example, we can mention the attacks on the oil refinery in Saudi Arabia in September 2019, the attack on the airport in the city of Jizan in the same Saudi Arabia in July 2020, the attacks on the Russian air base in the Syrian city of Khmeimi in 2019-2020. Almost every day, from the regions of the planet where armed conflict is taking place, there are reports of the destruction of storage places of weapons and means of destruction, which affects the course of armed conflicts. It is significant that unmanned aircraft are increasingly being used to destroy weapons. The article highlights the factors that determine the effectiveness of the use of unmanned aerial systems for the destruction of weapons storage sites, and predicted dynamic changes in these factors. The rapid development of microelectronic technologies, which is currently observed, became the basis for the improvement of unmanned aircraft systems, the expansion of the range of tasks performed by unmanned aircraft, the emergence of new classes of devices and the improvement of the tactics of their use. The rapid development of microelectronics is also considered from the point of view of confirming Moore's law, forecasts for the near future, clarifications of the law for the present time, clarifications of forecasts for the next 15 years. Conceptually, the opinions of the authors regarding the minimization of losses of weapons of destruction are presented, the basis of which are their own observations of the statistics of losses from storage sites of weapons of destruction of the Armed Forces of Ukraine for the period from 2003 to 2018, the causes of losses. Keywords: means of defeat, unmanned aerial vehicle, storage places, logistic security.

Russian microelectronics: Current state-of-the-art, logistics, management issues, crisis response measures

Subject. This article discusses the prospects for the development of Russian microelectronics and import substitution issues. Objectives. The article aims to develop measures to support Russian developers of microelectronic devices. Methods. For the study, we used the abstract-logical, computational-constructive, and case study methods. Results. The article proposes certain measures to support the microelectronics industry in Russia. Conclusions. The proposed measures can help prevent a crisis in the microelectronics industry in the face of sanctions imposed against Russia.

Improving the performance of flexible composites based on 3-3 interconnected skeletons for piezoelectric energy harvesting

With the rapid development of microelectronics and portable devices, flexible piezoelectric electricity generators (FPEGs) as self-powered devices have attracted extensive attention. Piezoelectric ceramic-polymer composites with good flexibility is the core component of FPEGs. Having high d33 and g33 values is also essential for power generation. Herein, the porous ceramic skeleton is prepared using PZT based as the ceramic powder and polyurethane sponge as the template, followed by compounding the porous ceramic skeleton with polydimethylsiloxane (PDMS) by vacuum impregnation to prepare a 3-3 interconnected composite. When the ratio of ceramic phase in the ceramic slurry is 75 wt%, the volume fraction of the ceramic phase in the composite can achieve 37 vol%. Before compounding PDMS, porous ceramics are polarised, which is called pre-polarisation. The d33 value of the pre-polarised composites can reach 158 pC/N as compared to not polarising the porous ceramic and then polarising it after composite; the improvement is 48%. In addition, the g33 value of the pre-polarized composites is up to 144 mV m/N. Moreover, the 3.0 × 1.2 × 0.2 cm3 FPEG can generate a maximum output voltage of 15 V and a maximum short circuit current of 167 nA at 9% compression strain. The maximum instantaneous power density is 990 nW/cm2, thereby providing a new idea for piezoelectric power generation.

Micro-Energy Harvesting From Automotive Dynamics

Abstract Most modern vehicles feature some level of automation that contributes to the overall feeling of comfort and safety. Traditional designs are, however, more difficult to apply. In fact, it is a growing consumer of wires for power and communication use, which increases the weight and cost. As a result, new micro-electronics development aims to create systems that do not require external power sources. The automotive systems are exposed to disturbances, which exhibit a vibrational response. This may be harvested into electrical energy. Therefore, the generated energy may be a potential power source for devices, applied to the vehicle. To this end, a micropower generator based on a piezo-electric device is attached to the front suspension arm, an unusual solution in the automotive industry, for extracting energy from vehicle dynamics to power micro-electronic devices and sensors. A numerical simulation from a three degrees-of-freedom model and an experimental vehicular test in different road types were applied to map the energy generated in the harvesting process. The results show that the possibility of generating micro-energy on good quality roads; is low when the International Roughness Index (IRI) is less than 4, and the micro-energy is less than 0.1 mW. However, significant performance is achieved on uneven roads (IRI > 10), that achieve harvested power greater than 0.2 mW. The IRI is a standard method for classifying road roughness. It was found generally that an off-road vehicle is better for harvesting micro-energy because of the high acceleration in the suspension.

Unmanned Aerial Transportation System With Flexible Connection Between the Quadrotor and the Payload: Modeling, Controller Design, and Experimental Validation

Aerial delivery is becoming a reality due to the development of microelectronics and communication technology. Most existing methods for cable-suspended transportation systems utilize fixed-length cable to connect the unmanned aerial vehicle quadrotor and the payload. Such aerial transportation systems present underactuated property, which is caused by the indirectly controllable payload motion and the underactuation of the quadrotor itself. In practical applications, payload hoisting and lowering motion independent of the quadrotor altitude will further expand the application scope in such areas as limited space crossing and offshore sample collection. To realize the aforementioned objectives, a flexible connection between the quadrotor and the payload is realized by mounting an actuator beneath the fuselage. Suffering from strong nonlinearity and complex dynamic coupling, the control problem becomes extremely challenging and more cumbersome, as the system’s degree of freedom (DOF) increases. To deal with these problems, in this article, a nonlinear control approach is presented by energy-based analysis, which achieves simultaneous quadrotor positioning, payload swing elimination and hoisting <bold xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">/</b> lowering. Lyapunov techniques and LaSalle’s Invariance theorem are utilized to prove the asymptotic convergence of the equilibrium point. Finally, a series of hardware experiments are conducted on a self-built aerial transportation platform. As far as we know, this article provides the first mechanism and control solution for payload hoisting/lowering independent of the quadrotor altitude.

Developments of stitched monolithic pixel sensors towards the ALICE ITS3

The ALICE collaboration is pursuing the development of a novel and considerably improved vertexing detector called ITS3, to replace the three innermost layers of the Inner Tracker System during the LHC Long Shutdown 3. The primary goals are to reduce the material budget to the unprecedented value of 0.05% X0 per layer, and to place the first layer at a radial distance of 18 mm from the interaction point. These features will boost the impact parameter resolution by a factor two over all momenta and drastically enhance the tracking efficiency at low transverse momentum.The new detector will consist of true cylindrical layers. Each half-cylinder is based on curved wafer-scale monolithic pixel sensors. The bending radii are 18, 24 and 30 mm, and the length of the sensors in the beam direction is 27 cm. The sensors will be produced using a commercial 65 nm CMOS Imaging technology and a recent technique called stitching. This allows to manufacture chips reaching the dimensions of 27 cm × 9 cm on silicon wafers of 300 mm diameter. The sensors will be thinned down to 50 µm or below. The ITS3 concept foresees cooling by air flow, ultra-light carbon foam support elements and no flexible printed circuits in the active area. This demands a power density limit of 20 mW/cm2 for the sensor, and the need to distribute supply and transfer data over the entire sensors towards circuits located at the short edges of the chip.This contribution summarises the status of the microelectronic developments and presents selected results from the characterisation of the first prototype chips. Furthermore, it describes the ongoing efforts on the design of a first wafer-scale stitched sensor prototype, the MOSS (Monolithic Stitched Sensor) chip.