Comparison of experimental methods for the extraction of the elastic modulus of molding compounds used in IC packaging

2012 ◽  
Vol 52 (11) ◽  
pp. 2677-2684 ◽  
Author(s):  
Andrej Ivankovic ◽  
Kris Vanstreels ◽  
Daniel Vanderstraeten ◽  
Guy Brizar ◽  
Renaud Gillon ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Experimental Methods ◽  
Molding Compounds ◽  
Ic Packaging

scholarly journals Determination of elastic moduli of elastic–plastic microspherical materials using nanoindentation simulation without mechanical polishing

2021 ◽  
Vol 12 ◽  
pp. 213-221
Author(s):  
Hongzhou Li ◽  
Jialian Chen
Keyword(s):  
Elastic Modulus ◽  
Elastic Moduli ◽  
Indentation Depth ◽  
Flat Surface ◽  
Computational Study ◽  
Experimental Methods ◽  
Mechanical Polishing ◽  
Initial Yield Stress ◽  
Elastic Plastic

When using the Oliver–Pharr method, the indented specimen is assumed to be a perfectly flat surface, thus ignoring the influences of surface roughness that might be encountered in experiment. For nanoindentation measurements, a flat surface is fabricated from curved specimens by mechanical polishing. However, the position of the polished curved surface cannot be controlled. There are no reliable theoretical or experimental methods to evaluate the mechanical behavior during nanoindentation of an elastic–plastic microsphere. Therefore, it is necessary to conduct reliable numerical simulations to evaluate this behavior. This article reports a systematic computational study regarding the instrumented nanoindentation of elastic–plastic microspherical materials. The ratio between elastic modulus of the microsphere and the initial yield stress of the microsphere was systematically varied from 10 to 1000 to cover the mechanical properties of most materials encountered in engineering. The simulated results indicate that contact height is unsuitable to replace contact depth for obtaining the indentation elastic modulus of microspherical materials. The extracted elastic modulus of a microsphere using the Oliver–Pharr method with the simulated unloading curve depends on the indentation depth. It demonstrates that nanoindentation on microspherical materials exhibits a “size effect”.

On the Experimental Methods for the Determination of Elastic Modulus and Hardness of Cement Particles by Nanoindentation

2010 ◽  
Vol 177 ◽  
pp. 554-557
Author(s):  
Kang Liang ◽  
Wu Yao ◽  
Dan Song ◽  
Li He
Keyword(s):  
Elastic Modulus ◽  
Epoxy Resin ◽  
Normal Values ◽  
Experimental Methods ◽  
Hardened Cement ◽  
Hydration Degree ◽  
Cement Pastes ◽  
Nanoindentation Measurement ◽  
Hardened Cement Pastes

The elastic modulus (E) and hardness (H) of the cement particles that embedded in different subbases (namely epoxy resin and hardened cement pastes with different ages) were measured by nanoindentation. The results indicate that the measured values of E and H of the cement particles encased in resins are smaller than normal values, while the measured values of cement particles embedded in hardened cement pastes are closely related to the hydration degree of subbase cement pastes. As nanoindentation measurement of cement particles is significantly affected by the hardness of the subbase, the test of E and H of cement particles should be carried out based upon a rather hard substrate.

Elastic modulus of amorphous boron suboxide thin films studied by theoretical and experimental methods

2003 ◽  
Vol 93 (2) ◽  
pp. 940-944 ◽  
Author(s):  
Denis Music ◽  
Ulrich Kreissig ◽  
Valeriu Chirita ◽  
Jochen M. Schneider ◽  
Ulf Helmersson
Keyword(s):  
Thin Films ◽  
Elastic Modulus ◽  
Experimental Methods ◽  
Amorphous Boron ◽  
Boron Suboxide

Acoustic microscopy techniques for the inspection of integrated circuit devices and packages

1992 ◽  
Vol 50 (2) ◽  
pp. 966-967
Author(s):  
Thomas M. Moore
Keyword(s):  
Integrated Circuit ◽  
Acoustic Microscopy ◽  
Hybrid Technique ◽  
Frequency Scanning ◽  
Ic Packaging ◽  
Ic Package ◽  
Microscopy Techniques ◽  
Ic Package Inspection ◽  
Pulse Echo ◽  
Scanning Acoustic Microscope

In the last decade, a variety of characterization techniques based on acoustic phenomena have come into widespread use. Characteristics of matter waves such as their ability to penetrate optically opaque solids and produce image contrast based on acoustic impedance differences have made these techniques attractive to semiconductor and integrated circuit (IC) packaging researchers.These techniques can be divided into two groups. The first group includes techniques primarily applied to IC package inspection which take advantage of the ability of ultrasound to penetrate deeply and nondestructively through optically opaque solids. C-mode Acoustic Microscopy (C-AM) is a recently developed hybrid technique which combines the narrow-band pulse-echo piezotransducers of conventional C-scan recording with the precision scanning and sophisticated signal analysis capabilities normally associated with the high frequency Scanning Acoustic Microscope (SAM). A single piezotransducer is scanned over the sample and both transmits acoustic pulses into the sample and receives acoustic echo signals from the sample.

ANALISIS VARIASI JUMLAH SUDU TURBIN BERPENAMPANG PELAT DATAR PADA TURBIN AIR ALIRAN VORTEX DENGAN TIPE SALURAN MASUK INVOLUTE

2020 ◽  
Vol 7 (2) ◽  
pp. 72-78
Author(s):  
Adnan Al Farisi ◽  
Yopi Handoyo ◽  
Taufiqur Rokhman
Keyword(s):  
Power Plant ◽  
Alternative Energy ◽  
Vortex Flow ◽  
Experimental Methods ◽  
Turbine Efficiency ◽  
A Value ◽  
Current Voltage ◽  
Materials Research ◽  
The One ◽  
Flow Vortex

The One of alternative energy that is environmentally friendly is by untilize water energy and turn it into a Microhydro power plant. Microhydro power plant usually made from utilize the waterfall with the head fell. While utilization for streams with a head small drop is not optimal yet. This is a reference to doing research on harnessing the flow of a river that has a value of head low between 0.7 m – 1.4 m with turning it into a Vortex flow (vortex). The purpose of this research is to know  the effect variation number of blade on power and efficiency in the vortex turbine. This research uses experimental methods to find current, voltage, torque and rpm using a reading instrument. The materials research vortex turbine used 6 blade, 8 blade and 10 blade with flat plate. The result showed the highest efficiency is 29,93 % with produce turbine power is 19,58 W, generated on turbine with variation 10 blade with load 3,315 kg and the capacity of water 10,14 l/s. Followed with an efficiency 24,17% and produce turbine power is 15,81 W, generated on turbine with the variation 8 blade with load 3,315 kg and the capacity of water is 10,14 l/s. The the lowest turbine efficiency 22,32% with produce tuebine power 14,60 W, generated on turbine with the variation 6 blade with load 3,315 kg, the capacity of water is 10,14 l/s.

Effect Of Elevated Temperatures On Complete Concrete Deformation Diagrams

2019 ◽  
pp. 9-14
Keyword(s):  
Experimental Data ◽  
Elastic Modulus ◽  
Elevated Temperatures ◽  
Peak Load ◽  
Relative Deformation ◽  
Deformation Characteristics ◽  
Compression Tests ◽  
Strain Behavior ◽  
Different Temperatures ◽  
Deformation Diagrams

The analysis of the previous results of the study on concrete stress-strain behavior at elevated temperatures has been carried out. Based on the analysis, the main reasons for strength retrogression and elastic modulus reduction of concrete have been identified. Despite a significant amount of research in this area, there is a large spread in experimental data received, both as a result of compression and tension. In addition, the deformation characteristics of concrete are insufficiently studied: the coefficient of transverse deformation, the limiting relative compression deformation corresponding to the peak load and the almost complete absence of studies of complete deformation diagrams at elevated temperatures. The two testing chambers provided creating the necessary temperature conditions for conducting studies under bending compression and tension have been developed. On the basis of the obtained experimental data of physical and mechanical characteristics of concrete at different temperatures under conditions of axial compression and tensile bending, conclusions about the nature of changes in strength and deformation characteristics have been drawn. Compression tests conducted following the method of concrete deformation complete curves provided obtaining diagrams not only at normal temperature, but also at elevated temperature. Based on the experimental results, dependences of changes in prism strength and elastic modulus as well as an equation for determining the relative deformation and stresses at elevated temperatures at all stages of concrete deterioration have been suggested.

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