|
|
Optimalization of CMOS Chip Interconnection Process for Higher Current Load
Novotný, Marek ; Mach,, Pavel (referee) ; Hulenyi,, Ladislav (referee) ; Szendiuch, Ivan (advisor)
This work deals with silicon chip interconnection with a view to high current up to 10A. A wire bonding method is used for interconnection. The first part of investigation is focused on the modeling and simulation by the help of program ANSYS. Thermo mechanical stressing and current density is important parts of this research. Stress and current density distribution are results of the first part. The experimental part describes transition resistance, electro migration and thermal process in the connection of wire and chip pad. A controlled current source (0 – 10A) is used for measurement. The current source makes it possible to 4-point method measurement with sampling rate 1,5MHz.
|
|
|
Real Estate Activities
Bobková, Lucie ; Novotný, Marek (referee) ; Telec, Ivo (advisor)
The main motive of this work is that real estate agents and professionals engaged in real estate activities are negatively perceived by society. We assume that the professional misconduct of estate agencies, often mentioned in the media, is due to a lack of professional expertise. Therefore, we deal with the issue of education level of skilled workers at the real estate market in the Czech Republic. In a sample of 72 respondents, we try to find the level of professional expertise. This thesis notes and compares legislative standards and criteria for the performance of real estate activity in the CR and abroad. Further maps initiatives to improve the expertise and efforts to change legislation that would generally lead to a controlled expertise increase of the real estate segment at the market. It touches, examines and attempts to define the basic columns of expertise required for qualified performance of real estate activities
|
|
|
Excercises for Data Acquisition for BEMS course
Novotný, Marek ; Richter, Miloslav (referee) ; Čejka, Miloslav (advisor)
The content of this thesis is to understand a field of data acquisition. There is explained what it is data acquisition and also there are described frequently used terms and principles, which belong to this theme. We have to understand how to get useful information from a specific physical effect or event; how can be this information processed or represented. A part of this thesis describes hardware side of this mechanism – the most used buses and measuring systems, cards and modules belonging to it. There are also described used developing and measuring programmes, their features and system of output of applications besides. In the thesis we can see which tasks can use data acquisition, which problems can appear and we have to know about them. As an example of the whole data acquisition there are showed two tasks which are worked out in system of LabVIEW. Both tasks work with real mechanisms so they get real data and we can work with them further.
|
|
| |
|
|
Semiconductor chip interconnection
Mareš, Petr ; Vaško, Cyril (referee) ; Novotný, Marek (advisor)
The Bachelor Thesis deals with contacting semiconductor chips using wirebonding. Opening chapters devoted to technology interconnect chips with the enviroment and materials to use. Much of this work is devoted to simulation wirebonding connections in Ansys. The simulations are engaged in examining thermomechanical stress in wires and current density at contacts.Results carried out simulations are measured with a focus on reliability and stressability of individual wirebonding connections. Part of this work is also practical measurements current stressability of wirebonding connections. At the end of the work was examined how to change the current stressability wires after the application of glue on contact.
|
|
| |
|
|
Programs for calculating measurement uncertainty using Monte Carlo method
Novotný, Marek ; Havlíková, Marie (referee) ; Šedivá, Soňa (advisor)
The thesis deals with establishing uncertainties of indirect measurements. It focuses primarily on random number generators in software enabling the calculation of mea-surement uncertainties using Monte Carlo. Then it focuses on the uncertainty calculati-on indirect measurement as the Monte Carlo method and the classical numerical met-hod. The practical part deals with the verification of randomness generators numbers contained in various softwares. It also deals with the determination of uncertainties indi-rect current measurements by both above-mentioned methods and then comparing and evaluating the values achieved.
|
|
|
Cooling effect on growth of intermetallic compounds in lead-free solder joints
Faldyna, Martin ; Novotný, Marek (referee) ; Vaško, Cyril (advisor)
This work deals with issues of process optimalization of lead-free soldering. The aim of this work is demonstrate of cooling on grow intermetallic layers during lead-free solde ring process and a hold intensity of cooling on joint quality. The experiment was performed with two types of solder pastes: Sn/Ag/Cu a Sn/Bi/Zn. The final samples were appraised in light of wet-ting, size of intermetallic layers, optical estimation solder and sudar stress test.
|
|
|
Using Computer Aided Engineering for analyse the detector
Novotný, Marek ; Špinka, Jiří (referee) ; Maxa, Jiří (advisor)
This diploma thesis deals with electron microscopy. Examined equipment is environmental scanning electron microscope (ESEM), namely scintillation a detector of the microscope. There is solved the influence of the profile of holes in diaphragms to the resulting pressure and gas flow on the path of secondary electrons at the detector. Introductory part of thesis informs about microscopy in general, with concentration on electron microscopy; especially on scanning microscope, because research is taken just on the environmental scanning electron microscope. Another part informs about both general principles of dynamics of gases and with finite volume method. Another part deals with concrete used software and with setting of individual parameters for calculation. At the beginning of calculation are used five basic profiles of holes in diaphragms for pressure 1000 Pa in the chamber of the sample. For modelling individual shapes is used 3D parametric modeller SolidWorks. Analysis of circulation of secondary electrons through detector is made by using Cosmos FloWorks module. The most suitable type of diaphragms is chosen from measured models. Another part of diploma thesis deals with measuring of chosen types of diaphragms for more pressures in the chamber of the sample; the pressure is 200, 400, 600, 800 and 1000 Pa. The outcomes of this research are both models of pressure and speed of circulation inside the detector and graphically processed values by using different diaphragms, respectively one type of a diaphragm in different pressures. Production drawings of each diaphragm, together with calculated models, are enclosed.
|
|
|
Virtual laboratory modul development
Volf, Lukáš ; Novotný, Marek (referee) ; Vaško, Cyril (advisor)
Virtual laboratory is project aimed at creation of modern teaching instrument, which should help to students of microelectronics, but not only them, to understand questions of surface mount technology and packaging in electrotechnics. This work deals with analysis one of substantial part of the project, which is creation of interactive animations helping to understand questions of a given problems. In this work are described partial technological processes and their sequential application into interactive multimedia format.
|
guest ::
RSS feed.