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This paper discusses the European strategies and their closely related research focuses on the environmental impact of electrical and electronic products. The influence of the referencing main EC-Directives and EC-Regulations on life cycle analysis and environmental impact assessment is discussed.
This paper deals with the investigation of wire bonding power interconnection for standard CMOS chips, which is very important for power application. Base part of this research is the determination of power load by the wire. For testing are design two types of substrate, especially the FR4 and ceramic substrate. As a conductive thick film layer on the ceramic substrate is used two different pastes...
The laboratory platform developed and presented in this paper is destined to teach and train the under-graduate students on the importance of post-layout analysis in advanced PCB/HDI design. The electronic project consists in a digital high speed pseudo-random generator, designed with high-speed logic families and operating at 50 MHz. Two (of four) modules of the platform, one non-optimized (“wrongly”)...
Soldering as metallurgical method of joining materials is an integral part of electronic technologies. Solderability is then a complex property of connected surfaces of solder joints, which includes three aspects: wettability, temperature requirements, and resistance to heat during soldering. Solderability testing determines the appropriateness of certain materials, fluxes, or solder alloys for industrial...
This paper proposes a Matlab platform used in a student's educational activities in order to acquire a better understanding of operational amplifiers functionality, and the basic properties of operational amplifiers and the non-ideal characteristics of the operational amplifiers. The Matlab platform is based upon a study about inverting or non-inverting amplifiers, comparators with or without feedback,...
In the development of new device concepts a lot of aspects are to consider. On the one hand there is the needing for a lot of channels which are fully synchronized with hard real-time behavior; on the other hand there are the requirements for the implementation of modern communication protocols such TCP/IP or USB to assure a full interoperability with the state-of-the-art communication infrastructure...
The article states first results of reliability measurement of committing of electronic modules with printed circuit board by lead-free solder balls (SAC 305). In order to obtain experimental data, the test boards are periodically exposed to thermal load from -20°C to +100°C with 20 minutes dwell time on the maximum and minimum temperatures. Test samples are produced on alumina ceramics and/or four-layer...
Investigations in this work are connected with design of energy effective multifunctional lamp for interior lighting. A mechanical construction of a desk lamp is used. LEDs are chosen as light sources. Characteristics of LEDs allow creating lightweight construction which can serve as: desk lamp (light flux about 600 ÷ 700 lm); night light for baby room (light flux about 100 ÷ 200 lm) and lamp for...
Active dynamic thermography using inductive heating was used for investigations on different steel components with a high allotment of carbon. The set of test specimens are semi-finished products from a continuous casting process. The cross sectional area of the products is 50×50 mm to 250×250 mm. Defects resulting from the production process have to be detected to avouch the desired quality to the...
Tantalum pent oxide thin films are used as dielectric layers for capacitors, gate insulating layers for MOSFETS, RF MEMS switches, etc. Charge carriers transport mechanism and charge storage in insulating layer are important parameters for the application in these de-vices. Ta205 films show good electrical and dielectric properties for considered applications and low leakage current density value...
Investigations deals with optimization of operating regimes of LEDs in lighting equipment for obtaining two purposes - maximum light output in dependence of ambient conditions and long term lumen maintenance. Thermal management calculations and heat sink choice are experimentally tested at various ambient conditions (air temperatures from 20oC to 55oC) and different current values through LEDs - up...
In this work are discussed the technology for preparing and characterisation of indium-tin oxide (ITO) and ITO with titanium oxide underlayer thin films with properties appropriate for usage at elevated temperatures as heat reflective coatings and gas sensors. For preparing the samples the methods of radio frequency (RF) and DC-magnetron reactive sputtering were used. Sputtering of indium-tin and...
Multilayer Organic Based Devices (OBDs) were constructed by subsequent casting of organic films (from polymers, soluble in the same organic solvent). The problem with dissolution of the underlying layer was avoided by using electrophoretic deposition technique. Optimized conditions for electrophoretic deposition (EPD) of thin films with homogeneous and smooth surfaces, as confirmed by SEM, were found...
In this work antistatic properties as ability to dissipate static electricity of different types of materials were investigated. Dissipation of static charge was investigated in relation to humidity changes. It has been shown, that decreasing humidity affected badly on charge decay time of some optical lenses examples. Additionally single layer of TiO2 thin films on SiO2 substrates were measured in...
This paper presents manufacturing process of laser-shaped thick-film resistors as well as their chosen electrical, geometrical, microstructural and stability properties. Test structures were based on commercially available conductive and resistive pastes deposited on Al2O3 substrates. Resistors made in standard screen printing process after firing were patterned using laser beam in order to minimize...
The investigation of conductive and resistive layers interface is topic of the work. Layers of measured structure were deposited by screen-printing of polymer pastes. The measured structure consists of contact area with different geometry. Contact resistance of interface between conductive and resistive layers was measured as a parameter of quality. The three-wire method was used for measurement....
The goal of this paper is to investigate a new method of parallel computing used for a wind speed model, taking advantage of a modern, multicore CPU and of LabVIEW graphical programming language. The wind speed model is widely used in literature as a superposition of two components, a low and a high frequency component. The high frequency or turbulent component is usually generated by filtering a...
Mechanical properties of isotropically conductive adhesives depend not just on the internal structure and composition (amount and type of binder and filler) of the adhesive, but also on chemical processes that are influenced by curing. Thermomechanical analysis allows to distinguish the point when the adhesive is fully cured, it may reveal a difference in mechanical properties after different modifications...
Today non-destructive evaluation techniques become more and more important. Consequently, X-ray detectors are suitable tools to get information about specimens. In comparison to the already established scintillation principle, the direct converting method on the basis of semiconductor materials delivers several advantages. Hence, it is necessary to speed this measurement method and develop appropriate...
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