Mechanical-Stress-Controlled Silicide Interconnections for Highly Reliable Semiconductor Devices

2002 ◽  
Vol 716 ◽  
Author(s):  
Hiromi Shimazu ◽  
Hideo Miura
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Mechanical Stress ◽  
Critical Stress ◽  
Critical Thickness ◽  
Titanium Film ◽  
Cross Sectional ◽  
Silicide Film ◽  
Induced Stress ◽  
Observation Results

AbstractMechanical stress develops in silicide interconnection structures due to the volumetric shrinkage of newly grown silicide film during silicidation. Silicidation-induced stress of about 1 GPa was measured by inducing a reaction between a silicon wafer and a titanium film deposited on the wafer. The stress developed near the interface between the grown silicide film. The remaining silicon was analyzed using a finite-element method. The critical stress for delamination at the interface was determined by comparing the results of the estimated stress at the interface with the cross-sectional observation results of different interconnection-structures test samples. We also determined the critical thickness of TiSi2 and the diameter of silicide contacts for eliminating delamination at the interface.

Atomistic simulation of the uniaxial compression of black phosphorene nanotubes

2018 ◽  
Author(s):  
Van-Trang Nguyen ◽  
Minh-Quy Le
Keyword(s):  
Finite Element Method ◽  
Molecular Dynamics ◽  
Finite Element ◽  
Uniaxial Compression ◽  
Critical Stress ◽  
Atomistic Simulation ◽  
Critical Strain ◽  
Bond Breaking ◽  
Black Phosphorene ◽  
Weber Potential

We study through molecular dynamics finite element method with Stillinger-Weber potential the uniaxial compression of (0, 24) armchair and (31, 0) zigzag black phosphorene nanotubes with approximately equal diameters. Young's modulus, critical stress and critical strain are estimated with various tube lengths. It is found that under uniaxial compression the (0, 24) armchair black phosphorene nanotube buckles, whereas the failure of the (31, 0) zigzag one is caused by local bond breaking near the boundary.

Shape Opimization of Femoral Components of an Artificial Hip Prosthesis Using the Three-Dimensional P-Version Finite Element Method

2001 ◽  
Author(s):  
Masaru Higa ◽  
Ikuya Nishimura ◽  
Hiromasa Tanino ◽  
Yoshinori Mitamura
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hip Prosthesis ◽  
Three Dimensional ◽  
Optimization Procedure ◽  
Peak Stress ◽  
Cross Sectional ◽  
Design Variables ◽  
Dimensional Shape ◽  
Element Method

Abstract The three-dimensional shape optimization of cemented total hip arthroplasty (THA) was introduced in this paper. The P-version Finite Element Method (FEM) combined with an optimization procedure was used to minimize the peak stress in the bone cement near the tip of the implant. Six-design variables were used in this study. Each variable represents the dimension of the medial-lateral width and anterior-posterior width of the three levels (proximal, distal and middle) of cross sectional area of the prosthesis. The results of the design optimization showed considerable reduction in stress concentration compared to the initial design that is currently used clinically.

DIRECT CURRENT RESISTIVITY MODELING FOR AXIALLY SYMMETRIC BODIES USING THE FINITE ELEMENT METHOD

Geophysics ◽  
1978 ◽  
Vol 43 (3) ◽  
pp. 550-562 ◽  
Author(s):  
H. M. Bibby
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Apparent Resistivity ◽  
Vertical Axis ◽  
Geothermal Field ◽  
Axially Symmetric ◽  
The Finite Element Method ◽  
Cross Sectional ◽  
Resistivity Anisotropy ◽  
Element Method

The finite element method is used to determine numerically the apparent resistivity anomaly caused by the presence of any body with a vertical axis of symmetry embedded in a uniform half‐space. The potential for a point source of current, and hence the apparent resistivity, is determined in the form of a Fourier series. The use of the finite element method enables certain classes of resistivity anisotropy to be modeled. Several examples of bipole‐dipole apparent resistivity enable us to examine assumptions that are necessarily made when inhomogeneities are approximated by models for which explicit solutions exist for the potential. An application to the Broadlands geothermal field suggests that the horizontal cross‐sectional area of the geothermal reservoir increases with depth, consistent with a decrease in the permeability with depth.

Analysis of the Three-Dimensional Flow in a Turbine Scroll

1980 ◽  
Vol 102 (3) ◽  
pp. 297-301 ◽  
Author(s):  
A. Hamed ◽  
E. Baskharone
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Flow Field ◽  
Three Dimensional ◽  
Inviscid Flow ◽  
Geometrical Shape ◽  
The Finite Element Method ◽  
Three Dimensional Flow ◽  
Cross Sectional ◽  
General Flow

The present analysis describes the three dimensional compressible inviscid flow in the scroll and the vaneless nozzle of a radial inflow turbine. The solution to this flow field, which is further complicated by the geometrical shape of the boundaries, is obtained using the finite element method. Symmetric and nonsymmetric scroll cross sectional geometries are investigated to determine their effect on the general flow field and on the exit flow condiitons.

Thermo-Mechanical Stress near Apex of a Bi-Material Wedge by a Novel Finite Element Analysis

2012 ◽  
Vol 525-526 ◽  
pp. 93-96
Author(s):  
Xue Cheng Ping ◽  
Lin Leng ◽  
Si Hai Wu
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Elements ◽  
Mechanical Stress ◽  
Displacement Field ◽  
Thermal Loading ◽  
Numerical Solutions ◽  
Asymptotic Solutions ◽  
Element Analysis

A super wedge tip element for application to a bi-material wedge is develop utilizing the thermo-mechanical stress and displacement field solutions in which the singular parts are numerical solutions. Singular stresses near apex of an arbitrary bi-material wedge under mechanical and thermal loading can be obtained from the coupling between the super wedge tip element and conventional finite elements. The validity of this novel finite element method is established through existing asymptotic solutions and conventional detailed finite element analysis.

scholarly journals Analysis of the impact of selected factors on the effectiveness of using PCM in mobile window insulation

2018 ◽  
Vol 49 ◽  
pp. 00073 ◽  
Author(s):  
Michał Musiał
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Statistical Evaluation ◽  
The Finite Element Method ◽  
Cross Sectional ◽  
Complete Melting ◽  
Approximate Polynomial ◽  
Aluminum Profiles ◽  
The Impact ◽  
Change Material

This article presents the results of experimental research, carried out on the elements of vertical and internal blinds, containing phase-change material in its. The research was aimed at determining the significance of such factors as: ambient temperature, shape of profiles containing PCM and the intensity of their heating to the actual amount of energy required for complete melting of PCM Samples of aluminum profiles of various cross-sectional shapes containing commercial RT 28 phase-changing material. The author carried out the research presented below on the basis of a poly-selective orthogonal plan. The analysis was performed using the finite element method, in the Statistica 12 program. The obtained effects of the performed tests and the conducted analysis enabled an independent statistical evaluation of the factors of the approximate polynomial.

Studies of the dynamic behaviour of a primary sedimentation tank

1996 ◽  
Vol 34 (3-4) ◽  
pp. 213-222 ◽  
Author(s):  
Claës Lindeborg ◽  
Niklas Wiberg ◽  
Alexander Seyf
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Flow Measurement ◽  
Dynamic Behaviour ◽  
Measurement Data ◽  
Tracer Tests ◽  
Operating Conditions ◽  
Cross Sectional ◽  
Sedimentation Tank ◽  
Element Method

This study concerns the dynamic behaviour of a primary sedimentation tank in a municipal WWTP. It is a part of the effort to estimate the varying biological load on the activated sludge stage under different operating conditions. The primary settlers have been investigated with several methods: (i) cross sectional sampling of suspended solids; (ii) tracer tests with lithium-solution; (iii) finite element method (FEM); (iv) flow measurement with a turbine-type sensor; and (v) cross-sectional flow measurement with a cross-bar metering device. The choice of measurement positions, the number of samples and the methods selected for analyses have all been guided by the ambition to avoid erroneous conclusions due to odd single measurement data. The study demonstrates how modern graphical computer methods like Finite Element Method and MATLAB Toolboxes can be used to increase our understanding of the settler.

Study of Electromigration-Induced Stress of Solder

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Fei Su ◽  
Zheng Zhang ◽  
Yuan Wang ◽  
Weijia Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Gradient ◽  
Inelastic Deformation ◽  
Comprehensive Evaluation ◽  
Vacancy Concentration ◽  
Fem Model ◽  
Induced Stress ◽  
Simulation Results ◽  
Solder Reliability

This study designed and produced a special microsolder specimen (Sn3.8Ag0.7Cu) to equalize current density under stressing. The specimen was generated to avoid temperature gradient and thermal migration. The inelastic deformation of the solder with electromigration (EM) alone was then measured with moiré interferometry. In addition, the EM-induced solder stress was evaluated using a finite element method (FEM). The precision of the FEM model was verified by comparing the simulated results with the experimental results with respect to EM-induced deformation. Findings indicated that the maximum spherical stress in the solder can reach 50 MPa. Moreover, the vacancy concentration is much higher on the cathode end than on the anode end. The simulation results can illustrate the failure mode of a solder and can therefore provide a basis for the comprehensive evaluation of solder reliability under EM.

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