Notice d'utilisation de la station sous pointes MPI TS-2000

National audienceCette notice décrit le mode opératoire de la station sous pointes MPI TS2000 et détaille :-les spécifications techniques-la mise en route -la mise en place d’un wafer et le posé des aiguilles de test -la mise à l’arrê

On-chip measurement to analyze failure mechanisms of ICs under system level ESD stress

International audienceElectro Static Discharge (ESD) is one of the major causes of electronic system failures. Reliability of ICs within the applications is strongly related to the on-chip propagated waveform of the ESD stress on the power supplies, the substrate and through the protections. This paper presents an on-chip oscilloscope developed for in-situ measurement of real ESD event in 65 nm CMOS technology. Dynamic measurements of overshoots, substrate fluctuation and onchip radiated fields presented in this paper are performed with 20 GHz bandwidth

Low Latency Demodulation for High-Frequency Atomic Force Microscopy Probes

International audienceOne prerequisite for high-speed imaging in dynamic-mode atomic force microscopy (AFM) is the fast demod-ulation of the probe signal. In this contribution, we present the amplitude and phase estimation method based on the acquisition of four points per oscillation, with the sampling frequency being phase-locked on the probe actuation. The method is implemented on a RedPitaya platform, with its clock being generated from the actuation signal of the probe. Experimental characterizations using square-modulated sine waves show that latency of 500 ns is achieved with a carrier frequency of 10 MHz, which is ten times faster compared with a state-of-the-art lock-in amplifier. A tracking bandwidth greater than 200 kHz is obtained experimentally. The method is eventually applied to a close-loop AFM scan realized using a 15-MHz AFM probe, showing its suitability for high-frequency oscillating probes. Index Terms-Amplitude and phase demodulation, atomic force microscopy (AFM), field-programmable gate array (FPGA) implementation

ENERGY SCAVENGING BASED ON TRANSIENT THERMAL GRADIENTS: APPLICATION TO STRUCTURAL HEALTH MONITORING OF AIRCRAFTS

International audienceResults about energy capture from the environment associated with the self-powering of a wireless sensor network (WSN) for structural health monitoring of aircrafts (SHM) are presented. Thermal gradients taking place during specific flight phases are converted into electrical energy by using a small water tank coupled to a thermoelectric generator which output is connected to a storage circuit. The proposed system is experimentally assessed in an environmental chamber. Regarding the energy storage issue, considering the operating temperature (-55°C) and the amount of energy, supercapacitors are suggested instead of batteries. For capacitors charging and later use of energy, a circuit based on a voltage booster associated with a DC-DC regulator is designed and simulated

Self-Propagating Reaction Mechanisms in TiB2 Integrated Al/CuO Nanothermites

International audienceUnary nanoscale metallic fuels such as Al, Ti, Mg, Zr, and B with an oxidizer have been massively explored in reactive energetic formulations commonly used in explosives and propellants owing to their high combustion energy. While Al has routinely been preferred, its low melting point and the resultant sintering effects curtail the reaction surface area. Despite the high gravimetric and volumetric enthalpies of B, low combustion rates and poor diffusion across the liquid boron oxide barrier restrict its use as a fuel. Although Ti oxidation can be induced at low temperatures, its high sensitivity limits the integration in nanolaminates. To overcome some of these common limitations imposed by single fuel thermites, binary fuel systems are seen as a very desirable strategy to prepare insensitive safe to handle nanothermites exhibiting fast energy release and high propagation rates. Whereas TiB2 may not be the most obvious choice of fuel, the fuel-oxidizer surface synergistic effects brought by its integration in Al/CuO nanolaminates resulted in enhanced reactivity characterized by relatively faster burn rate and shorter ignition delay. Beyond the excellent heat conducting properties, TiB2 demonstrated a strong affinity towards oxygen boosting low temperature CuO decomposition concomitantly forming TiO and boron oxide, following which Al underwent oxidation via both liquid boron oxide and vapor phase oxygen. There is however a lack of fundamental understanding of the self-propagating mechanisms in such ternary thermites due to the complexity associated with the material heterogeneities and multiphase flow occurring during combustion. Herein, sputter-deposited ternary Al-TiB2/CuO nanolaminates are fabricated as model structures, and a high-speed imaging system is utilized to study the flame-front propagation at sub-millimeter scales. DC magnetron sputtering is specially chosen to obtain precisely controlled layer-by-layer structures. To assess the extent of variation in the combustion regime, TiB2:Al molar ratio is varied between 0 and 1. We examine the entire material life cycle of Al-TiB2 bi-fuel component comprising of microfabrication, placement of TiB2 in Al/CuO multilayer stack as well as the individual effects of Al and TiB2 on the self-propagating combustion mechanism. While the individual placement of TiB2 nanolayer in the stack only slightly affects the ignition and the combustion properties, the measure attests to be critical in precluding nano-structural losses. Finally, various combustion stages and flame front behaviors are discussed, followed by a scenario of the combustion process

Accurate Transient Behavior Measurement of High- Voltage ESD Protections Based on a Very Fast Transmission-Line Pulse System

International audienceA comprehensive study of the limitations of vf-TLP setup for transient measurements is exposed. A new method, based on a numerical correction of measured data using a commercial Oryx vf-TLP system is presented. It allows the measurement of ESD pulses up to 1000 V with a time resolution down to 60 ps

Transient-TLP (T-TLP): a simple method for accurate ESD protection transient behavior measurement

International audienceUnderstanding the transient behavior of ESD protection devices is a key to optimize IC protection solutions. However, outside of the ESD world, electrical characterization of pulsed electrical signal involving both kilowatts of power and extreme frequency bandwidth (DC to several GHz) is definitely not common. Dedicated and specific measurement methodologies are thus required. In this work, we proposed a new and simple method that allows accurate triggering behavior measurements based on a standard very-fast TLP setup, which does not compromise on any performance aspects (bandwidth, maximum current, single-pulse, simplicity...) and does not require any additional or external characterization equipment

An Accelerated Stress Test Method for Electrostatically Driven MEMS Devices

International audienceThis paper addresses an innovative solution to develop a circuit to perform accelerated stress tests of capacitive microelectromechanical-system (MEMS) switches and shows the use of instruments and equipment to monitor physical aging phenomena. A dedicated test circuit was designed and fabricated in order to meet the need for accelerated techniques for those structures. It integrated an in-house miniaturized circuit connected to additional test equipment (e.g., oscilloscopes and capacitance meters) that enabled the reliability characterization of capacitive switches. The accelerated stress test (AST) circuit generated an electrostatic-discharge-like impulse that stressed the device. This setup allowed the simultaneous measurement of the current and voltage waveforms, and the capacitance variation of the device under test after each stress. The results obtained using the miniature AST circuit were discussed and were correlated with results obtained using a commercial human-body-model tester as well as data from a cycling benchmark. The scope of this paper encompasses the theory, methodology, and practice of measurement; the development of a testing miniaturized board; and the analysis and representation of the information obtained from a set of measurements. As a result, it may contribute to the scientific and technical standards in the field of instrumentation and measurement of electrostactically actuated devices having insulating layers