1,721,054 research outputs found
Low Frequency noise measurements as a characterization tool for degradation phenomena in solid-state divices
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Temperature Controlled Oven for low noise measurements systems
No full textLow-frequency noise (LFN) measurements are often applied to the characterization of electron devices. When such mea- surements have to be performed on electronic components main- tained at a given temperature, the thermal stability of the oven which is used for this purpose becomes a major concern, because of the high sensitivity of electron devices to temperature fluctuations (TF’s).
In this paper, we present the realization of a high-stability tem- perature-controlled oven, purposely designed for the characteri- zation of electromigration in metal interconnections of integrated circuits by means of low-frequency noise measurements.
The prototype which has been realized demonstrates that the contribution of the thermal fluctuations of the oven to the back- ground noise of the measurement system is negligible down to fre- quencies as low as 10 mHz in the entire range of operating temper- atures (25–250 C)
Long term noise measurements and MTF test for the characterization of Electromigration in metal lines
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Temperature coefficient of resistance fluctuations during electromigration in Al lines
No full textA simplified model is presented for the degradation of the conducting properties of Al stripes subjected to electromigration. Such a model has been used in order to investigate the role of grain boundaries in the be- havior of the temperature coefficient of resistance (TCR). The results obtained by means of two dimensional simulations allow us to give a sim- ple interpretation of the experimentallyobserved fluctuations of the TCR during electromigration
UHT Milk Characterization by Electrical Impedance Spectroscopy
No full textUltra-High Temperature (UHT) pasteurized milk is the most diffused variety of milk in Europe. In this paper, a method is presented, employing Electrical Impedance Spectroscopy to characterize the different commercial milks commonly available in grocery stores and supermarkets. The curves of the measured admittance allow for the classification of the type of milk (whole, semi-skimmed, fat-free) and to distinguish lactose-free milk. An electrical circuit model has been derived and different values of circuit parameters add interesting information on the classification of the samples. Furthermore, the characterization allows for the identification of the degradation of the milk before it is visible to the eye, thus highlighting the difference between storage in the fridge and at room temperature, and identifying expired milk
Dedicated instrumentation for high sensitivity, low frequency noise measurement systems
No full textLow Frequency Noise Measurements (LFNM) can be used as very sensitive tool for the characterization of the quality and the reliability of electron devices. However, especially in those cases in which the frequency range of interest extends below 1 Hz, instrumentation with an acceptable low level of background noise is not easily found on the market. In fact, at very low frequencies, the flicker noise introduced by the electronic components which make up the instrumentation becomes predominant and several interesting phenomena which could be detected by means of LFNM may result completely hidden in the background noise. This consideration is not limited to the case of input preamplifiers but does extend to any piece of instrumentation that contributes to the LFNM systems, and in particular to the power supplies used for biasing the Device Under Test. During the last few years, our research groups have been strongly involved in the design of very low noise instrumentation for application in the field of LFNM. In this work we report the main results which we have obtained together with a discussion of the design guidelines that have allowed us, in a few cases, to reach noise levels not to be equalled by any instrumentation available on the market
INSTRUMENTATION DESIGN FOR CROSS-CORRELATION MEASUREMENTS BETWEEN GATE AND DRAIN LOW FREQUENCY NOISE IN MOSFETS
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