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In this study, we investigate the Ron degradation in D-mode AlGaN/GaN MIS-HEMTs on a Si substrate via an accelerated step stress at different temperatures. We have observed a three-phase Ron degradation behavior, which is highly correlated with a drain bias and back gate bias. First, the Ron degradation increases till a peak value when the drain bias increases. Second, when the drain bias increases...
The feature size of integrated circuit devices continues to decrease. And with the development of metal interconnection technology, metal wire constantly changes to thin and thin such that metal resistance increase, current density rise and the heat generated augment. For these reasons the integrated circuit reliability about electro-migration (EM) declines which is a serious threat to IC's performance...
Maradudin firstly proposed Laguerre orthogonal polynomial to solve the acoustic waves in homogeneous semi-infinite wedges in1972. However, the approach can deal with the multilayered structures only when there is no significant change for the material properties of two adjacent layers. In order to overcome the drawbacks of the conventional polynomial approach, this paper proposed an improved orthogonal...
Based on the clear concept of continuous welded rail locked rail temperature, and combined the technology management status of continuous welded rail locked rail temperature of Jiaoji passenger dedicated line, determination methods of locked rail temperature of Jiaoji passenger dedicated line are analyzed. In the end, convenient and reliable rail longitudinal force and the actual locked rail temperature...
A study on the effect of curvature of triangular shaped cantilevers in MEMS sensors was presented. 3-D models were performed by using the SolidWorks software. And modal analysis and harmonic response analysis were carried out on different types of geometrically configured triangular shaped cantilevers using ANSYS software. The results included the variation of natural frequencies of cantilevers and...
Foot problems such as pain and calluses are common for high-heeled shoe wearers. These problems may be related to the excessive local plantar loading, including pressure and shear stress. The shear stress is important on such a declined support surface of high-heeled shoe. The purpose of this study was to investigate the distribution of contact pressures and shear stresses simultaneously between plantar...
The rupture of the medial collateral ligament (MCL) occurs frequently during high valgus impact or sporting activities and commonly results in subsequent injuries. Experimental and clinical studies have been widely performed, but were limited to obtaining stress distribution and conducting parametric studies. The purpose of this study was to develop a validated three-dimensional finite element model...
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