Standard packaging and interconnection technologies of power devices have difficulties meeting the increasing thermal demands of new application fields of power electronics devices. Main restrictions are the decreasing reliability of bond-wires and solder layers with increasing junction temperature. In the last few years intensive efforts have been invested in developing new packaging and inter...

Predators, particularly those living in deserts, use two main foraging strategies, namely sit-andwait or wide foraging. The Moorish gecko Tarentola mauritanica, a gecko frequently inhabiting humanized habitats, has been repeatedly classified as a sit-and-wait predator. However, previous data on dietary composition in natural habitats suggest a wide foraging strategy for this species. This study...

ii The last thermal issue addressed by this thesis is related to temperature cycling. Temperature cycling test procedures are usually applied to safetycritical systems to detect cycling-related early-life failures. Such failures affect advanced SoCs, particularly through-silicon-via structures in 3Dstacked-ICs. An efficient schedule-based cycling-test technique that combines cycling acceleratio...

The paper will give a detailed presentation of an active power cycling test bench in high temperature conditions developed to ageing the solder between the Direct Copper Bonding (DCB) and the base of IGBT devices. The average junction temperature measurement protocol, the temperature regulation of the base plate, the acquisition of all the electrical signals, and the performance of the test cir...

The thermal cycling stress method is popularly used to study the thermal mechanical effect on metallization films in VLSI applications, specially in interconnect systems of power IC. The fast thermal cycling stress method reported in this paper has several advantages compared with using a conventional oven for thermal stress. A special test chip is designed to demonstrate the application of thi...

Degradation is a common problem for polymer matrix composites (PMCs) under low thermal cycling conditions. This paper investigates the effects of low thermal cycling on total mass loss (TML) and surface degradation of PMCs. Unnotched and open-hole specimens were weighed before and after low thermal cycling. The total mass loss and surface degradation of the specimens were studied over 250 cycle...

the principal effects of mass degradation on polymer matrix composites (pmcs) are the decay of mechanical properties such as strength, elongation, and resilience. this degradation is a common problem of the pmcs under thermal cycling conditions. in this article, composite degradation was investigated by measurement of total mass loss (tml) using the taguchi approach. thermal cycling tests were ...

The principal effects of mass degradation on polymer matrix composites (PMCs) are the decay of mechanical properties such as strength, elongation, and resilience. This degradation is a common problem of the PMCs under thermal cycling conditions. In this article, composite degradation was investigated by measurement of total mass loss (TML) using the Taguchi approach. Thermal cycling tests were ...

Pr0.5Ca0.5Mn1−xCrxO3 (x= 0.015-0.05) undergoes an insulator-metal (I-M) transition below a temperature Tp driven by percolation of ferromagnetic metallic clusters in a charge ordered insulating matrix. Surprisingly, the I-M transition in these compounds is unstable against thermal cycling : Tp decreases and the resistivity at Tp increases upon temperature cycling between a starting temperature ...

introduction: current thermal cycling units fail to simulate the drinking behaviors, and oral balancing temperature. they cannot also simulate other oral conditions such as drink coloring, and chemicals like tea, coffee, carbonated and noncarbonated, citrus juices as well as alcoholic and nonalcoholic drinks and also saliva and milk itself. the main objective of this study is to introduce the d...