This study focused on the reliability testing of tantalum capacitors. The objective was to develop efficient tests to examine the effects of temperature cycling on capacitor maximum voltage. A test according to the standard JESD22-A104D overlooks the fact that temperature changes often occur while the voltage is on. Capacitors were first tested according to the standard without voltage; the tes...

the calling behavior of virgin carob moth females, ectomyelois ceratoniae (zeller) (lep.: pyralidae) was evaluated under two different thermal regimes, cycling and constant temperatures under laboratory condition. the period of calling activity under cycling temperature was prolonged and the total period of calling activity of an individual female was increased. although moths maintained under ...

This study focuses on the effects of different temperatures and temperature cycling on breakdown voltages of tantalum capacitors. High and low temperature tests and temperature cycling tests were done. In all tests the used temperatures were inside component’s operating temperature limits. After the tests, capacitors were tested for their breakdown voltage. According to results of this research...

This study simulated the performance of Cu-cored solder joints in microelectronic components subjected to the extreme thermal cycling conditions often encountered in the automobile industry by comparing the thermal cycling behavior of Cu-cored solder joints containing two different coating layers of Sn– 3.0Ag and Sn–1.0In with that of a baseline Sn–3.0Ag–0.5Cu solder joint under a severe temper...

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The Arrhenius plot for 39At released uring step heating of a sample containing a distribution of diffusion domains will depart from a straight line in ways that depend on the domain size distribution and the heating schedule used to extract he 39At. In a new series of experiments we make use of the heating schedule effect to confirm the multidomain nature of several alkali feldspar samples. We ...

We have compared aging phenomena in the Fe0.5Mn0.5T iO3 Ising spin glass and in the CdCr1.7In0.3S4 Heisenberg-like spin glass by means of lowfrequency ac susceptibility measurements. At constant temperature, aging obeys the same ‘ωt scaling’ in both samples as in other systems. Investigating the effect of temperature variations, we find that the Ising sample exhibits rejuvenation and memory eff...

Fracture analysis of glass/epoxy composites under different thermal cycling conditions is considered. Temperature difference, stacking sequence, fiber volume fraction and number of thermal cycles are selected as the experimental design factors. The Taguchi method is implemented to design of the experiment and an apparatus is developed for automatic thermal cycling tests. The tensile tests are d...

Temperature cycling optical hole-burning experiments on cresyl violet in ethanol glass are reported. At 1.3 K a hole is burned and measured. The temperature if then raised to 2.1 IQ the hole is measured. The temperature is returned to I, 3 K, and the hole is again measured. The hole is observed to be narrow at 1.3 K, broader at 2.1 K, and then narrow again when the temperature is returned to 1....

We study the deviations from perfect memory in negative temperature cycle spin glass experiments. It is known that the a.c. susceptibility after the temperature is raised back to its initial value is superimposed to the reference isothermal curve for large enough temperature jumps ∆T (perfect memory). For smaller ∆T , the deviation from this perfect memory has a striking non monotonous behavior...