The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Microelectronic components are introduced to an increasing number of applications as part of a controlling or monitoring device, as sensors or as means to tracking. Depending on the application, extreme loading profiles may need to be endured such as high temperatures, random vibrations or humid and even wet environments. Absorbed moisture has a plasticizing effect on the physical properties of polymers...
This paper presents the design, fabrication, and testing of a compliant rotary nanopositioning stage for precision engineering applications. The major advantage of the rotary stage lies in that it possesses a large rotational range and a compact size simultaneously. A new idea of compound radial flexure is proposed to enable this merit. A novel rotary stage is designed to provide a rotary angle over...
The search for an acceptable die attach solution to the European End of Life Vehicle RoHS Directive has proven problematic for the industry with several potential materials being evaluated. The mandate affects a full array of semiconductor device types from Power Modules, Smart Power ASICs to Power MOS-FETs & IGBTs in SMD and Through-Hole packages, which all contain high temperature lead containing...
An unique adhesion testing was developed, in which a corner edge of a mold compound was adhered to a lead frame on a diagonal line while making 90° rotation, in addition, mechanical loading was applied to the corner of interfacial edge between dissimilar materials in three point bend tests. The integrated stress modeling during reflow considered five types of modeling, moisture diffusion during moisture...
We demonstrate a high-throughput method for synthesizing zinc selenide (ZnSe) in situ during fiber drawing. Direct atomic-level compositional and structural analysis of the produced compound is performed, and a ZnSe-based in-fiber heterojunction device is achieved.
We study the signal enhancement at 1.53 μm in a high Erbium concentration, long lifetime single-crystal Erbium Chloride Silicate (ECS) nanowire. 644 dB/cm signal enhancement is measured from a single ECS nanowire via pump-probe method.
The edge stresses, which are responsible for all physical properties of nanoribbons, always involve two sided non-equivalent edge effects for zigzag honeycomb nanoribbons of two dimensional binary compounds such as BN and MoS2. In present work, we develop an approach to determine the edge stresses of individual non-equivalent zigzag edges. For prototypical system of BN zigzag nanoribbon, the edge...
This paper reports the application of SiO2 nanoparticles (NPs) as an adsorbent bed for capturing volatile organic compounds (VOCs) in a micropreconcentrator (μPC) chip for the first time. The adsorbent coating is deposited inside and on the sidewalls of the microfabricated 3D square structures using layer-by-layer (LbL) self-assembly technique. The device consists of 12mm×9mm×0.5mm chip with square...
For getting high quality air holder part, its' shape and demand are analysised, then determining the technology route, each procedure's extension size and the relative force are calculated, then the assemble of dies could be obtained. Thus CAD/CAE technology could reduce dies' design time and cost.
Polymer insulators are used in many utilities in the entire world, its use is expanding due to many advantages that offer to the utilities; they are not only cheap in the initial cost; also along their useful life the maintenance cost is lower than their counterpart, the ceramic insulators. In this work, a base HTV silicone rubber was reinforced with micro and nano particles and its performance was...
The geometry optimization, elastic constant, electronic band structure, density of state (DOS) and optical properties of perovskite SnZrO3 (SZ) are investigated from first principles calculation using the Density Functional Theory (DFT) within Local Density Approximation (LDA). All the calculations are performed using the Cambridge Serial Total Energy Package (CASTEP) computer code. The independent...
Nanosized La1−xCuxMnO3 (x≤0.1) was synthesized at different temperatures by using heteronuclear complexing method. X-ray diffraction analysis show that sample consists of two phases: La1−xCuxMnO3 (x≤0.1) having R3¯c space group with rhombohedral symmetrical structure and La2Cu2O5 having C2/c space group with monoclinic symmetrical structure. The results show the quantity of La1−xCuxMnO3 increase from...
The reliability of copper bonding wire in plastic mold package has been associated with the intermetallic compound formation and growth in the presence of halogen element such as chloride in epoxy molding compound. Much have been studied on copper aluminide intermetallic compounds at the copper/aluminium interface such as CuAl, CuAl2 and particularly Cu9Al4 which is known to link with failure in copper...
In- and out-doors LED is a new device with excellent performance in power-saving, lighting efficiency, reaction time. Currently, it is widely used in communication, display, illumination. Reliability is a key point to promote its application. The most important reliability issue in LED modules is about packaging which includes refrigeration, bonding wire, the aging of organic material, good packaging...
This paper proposes a magnetic actuator of a new type that exhibits a very high thrusting force and is capable of a reversible motion in a complex pipe. The magnetic actuator of the reversible type due to opening and closing of a compound material by using elongation and contraction of four shape-memory-alloy (SMA) coils was fabricated. The magnetic actuator moves by difference in frictional force...
In analysis of copper wire moisture related reliability failures long hours are spent on the FIB tool. Two techniques are introduced to reduce the long analysis time: 1) An alternative FIB trenching method that reduces milling duration by 5X and, 2) A “FIB-free” approach using laser ablation
Nonlinear optical (NLO) materials have been extensively studied for many years. The search of new materials with NLO properties is an important research field. Significant interest still exists in the design and development of materials exhibiting large second and third-order NLO response because of the potential application in optoelectronics devices [1–2]. In this talk, comparison between quantum...
Integrating CSCL activities is something that has been widely discussed in the CSCL community but as yet only implemented in a reduced set of domain specific tools. In this paper we propose the integration of a set of default and authoring CSCL tools into a standard LMS, as a complete sequence of learning activities based on a constructivist approach. An experiment was also carried out in order to...
Polymer based materials are widely used in electronic packaging. The molding compound, in particular, comprises a significant portion of the package with the purpose of protecting the chips from the environment. Material characterization of molding compounds, therefore, has been a critical issue in predicting the thermo-mechanical behavior and reliability of electronic packaging. One of the distinctive...
Formulations with TiN/Cu etch rate selectivity greater than 60 at 40 °C for TiN pullback and 200 at 55° C for complete TiN mask removal, respectively, have been developed. The formulations are compatible with Cu, low-k and SiON materials, and prevent Cu re-oxidation.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.