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Thermo-mechanical reliability evaluation of PLCC packaging Xianghui Guo1, a, Chunguang Xu1,b and Liu Yang1,c 1School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China aguoxianghui1120@163.com, bxucg@bit.edu.cn, cyangliuqing1987@tom.com Key words: thermo-mechanical reliability; PLCC packaging; SAM; FEA Abstract: Thermo-mechanical failure is the main factor to impact the microelectronic packaging reliability.
Firstly, a geometric model of Plastic Leaded Chip Carrier (PLCC) packaging was established and the thermo-mechanical property of PLCC packaging was analyzed using finite element analysis (FEA) software ANSYS.
The defects such as crack and delamination can emerge and grow under the cyclical thermal stress which will affect the reliability of microelectronic packaging.
Firstly, a geometric model of Plastic Leaded Chip Carrier (PLCC) packaging was established and the thermo-mechanical property of PLCC packaging was analyzed using finite element analysis software ANSYS.
(1) A three dimension geometric model of PLCC packaging was established using 3D drawing software Pro/Engineer and the thermo-mechanical property of PLCC packaging was analyzed using finite element analysis software ANSYS

., 300222, Timisoara, Romania adenis.madroane@student.upt.ro, biduma@isim.ro, c*sergiu.galatanu@upt.ro Keywords: adhesive, bonding, mechanical properties, fracture strength, drying time Abstract.
The paper presents some general aspects of adhesives used in the automotive industry, the method used to determine mechanical properties, and the advantages compared to the traditional technology used.
The first part of the paper focuses on the determination of the mechanical properties of adhesives used in the automotive industry.
On the other hand, the mechanical strength of the system depends not only on interfacial forces, but also on the properties of the interface region [2, 3].
S., Physicochemical Properties of Various Shellac Types, Dissolution Technologies, 2009

Some properties of handling, steering feel and ride-comfort of a passenger vehicle are affected by the tribological performance of the ball joint [1].
It is reported that the friction characteristic of ball joints can be changed by modifying the parameters that affect the friction behavior of ball joints, such as mechanical properties of friction materials, the compositions of lubricants, and temperature [4-7].
Orthogonal Experimental Method The influencing factors, including contact area, normal pressure, roughness, and velocity have been determined with the specific level of each factor according to the experimental conditions and the actual working condition of ball joints.
Experiments show that the area of the curve is affected by factors such as normal pressure and lubricant viscosity.
Evaluation of Tribological Properties of Polymer Materials Used for Sliding Bearings in Agricultural Machinery [J].

The Physical-Mechanical Properties in Aggressive Media of Epoxy Composite Reinforced with Waste Glass Materials Hadeel I.
Mechanical Properties The mechanical qualities of a material are those that influence how it responds to a load.
Effect of Silica Powder Addition on Mechanical Properties of Polymer Laminate Composite.
Effect of glass addition and heat treatment on mechanical properties and wear rate of aluminum-2% graphite." 
Abbas, Study of the thermal effect on the mechanical properties of a hybrid composite, vol. 1. (2007).

The effect of the quantitative and qualitative composition of mixed binders on the physical and mechanical properties of cement compositions has been experimentally established.
In earlier studies, structural changes due to the influence of technological factors were considered.
Therefore, such a change causes disturbance of the interblock structure and material properties in localized areas.
In this case, the value of ΔV is affected by the quantitative and qualitative compositions of fillers
Conclusions The effect of qualitative and quantitative compositions of mixed binders on physical and mechanical properties of hardened cement compositions has been experimentally established.

Scale Behaviour and Deformation Properties of Oxide Scale during Hot Rolling of Steel Marcel Grafa, Rudolf Kawallab TU Bergakademie Freiberg, Institute of Metal Forming, Freiberg (Saxony), Germany a marcel.graf@imf.tu-freiberg.de, b rudolf.kawalla@imf.tu-freiberg.de Keywords: oxide scale, deformation behaviour, flow curve, stress intensity factor Abstract This paper describes the possibilities for identifying temperature-dependent mechanical and thermo-physical properties of oxide scale components which are a necessary data input for a numerical simulation.
Hence, the mechanical properties and the metal forming relevant properties of the several oxide layers are very different.
This concerns the description of mechanical properties at room temperature as well as the finale surface quality, as these information are necessary for the following processing steps and at the end for the benefits of the products.
Additionally, heat transfer and surface roughness are affected as well.
Kawalla, Deformation Behaviour and Mechanical Properties of Oxide Scales during Hot Metal Forming Processes, steel research intern. – Special Edition 10th ICTP 2011, 78-81

The type of disruption and the location of the disruption of the samples are important monitored factors.
properties of nonconventional reinforcements using a specially designed deformation sensor and the testing process are described in this contribution.
The determined tensile strength of the basalt reinforcement is higher than it could be expected because of basic properties of basalt.
The basalt fibers seem to be more suitable for using as reinforcement elements for UHPC matrix from the point of view of not only the determined mechanical properties but also because of the fact that the basalt fibers are in average about approximately 30 % cheaper than AR-Glass.
[2] ČSN EN ISO 13934-2 Textiles – Tensile properties of fabrics – Part 2: Determination of maximum force at maximum force using the grab method

The FT-IR spectra, physical mechanical properties and antibacterial activities of nano silver antibacterial polyester fabrics had been tested and compared with common polyester fabrics.
Introduction Polyester, one of the most important raw materials in textile production, is widely used in clothing fields for its excellent properties such as high mechanical strength, good wearing resistance, easy to wash and fast drying [1].
It is discovered that the modification process had not weaken the mechanical properties of the polyester fabrics.
As one of the most important factors to consider for the antibacterial finish of modified fabrics is its durability against repeated washing cycles, the samples of nano silver antibacterial polyester fabrics after 0, 10, 20, and 50 washing cycles were subjected to antibacterial tests.
The antibacterial finish had little effect on the macromolecular structure and physical mechanical properties of the polyester fabrics.

Surface nanocrystallization (SNC) is a novel method for improving materials properties.
The microstructural evolution of the nanostructured surface layer was characterized by different techniques and the change of mechanical properties of the layer after the SMAT treatment was analyzed.
The increment of microhardness may be associated with two main factors.
The corrosion resistance of materials is dependent upon many factors.
These factors mentioned above lead to a decrease in the corrosion resistance of nc copper.

Introduction Aluminum alloys are widely used in aerospace and other fields because of their low density, excellent mechanical properties, and good processability.
This phenomenon leads to premature failure, even in materials with good mechanical properties.
(1) Impact of relative humidity The relative humidity in air is one of the most important factors affecting atmospheric corrosion.
(3) Ambient temperature The ambient temperature is an important factor affecting atmospheric corrosion.
Sunshine is also an important factor affecting the atmospheric corrosion of materials.