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Electrolytes based on sulfolan and similar solvents
Máca, Josef ; Zatloukal, Miroslav (referee) ; Sedlaříková, Marie (advisor)
Submitted thesis deal with study of aprotic electrolytes in order to increase the safety for use in lithno – ionts accumulators. Increase of safety is specified by measuring the flash point of each electrolytes, at the same time are evaluated also other parameters important for use in accumulators. For determine the window of temperatures where the electrolytes can work is measured by melting point. The melting point is measured by cryoscopy. From electrical properties is measured specific conductivity of the electrolyte.
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Solderability of PCBs Surface Treatments and Environmental Influences
Jičínský, Jiří ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This bachelor’s thesis deals with the properties of surface treatment of printed circuit boards. The main purpose of this work is to compare the OSP coating applied under laboratory conditions and the technological procedure established in the company ČEMEBO Blansko. Samples of ENIG, immersion tin and OSP compare due to their critical aspects. In the practical part, the samples au exposed to various elements of nature according to ČSN EN 60068-2. The surface wetting balance method will be used for better comparison and evaluation.
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Analyse and Optimise Production Process of Prototypes
Hamr, Tomáš ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This diploma thesis summarizes basic findings about issues of making development samples of PCB. The emphasis is especially on required quality which complies with mentioned norms. The theoretical section includes methodology for evaluating quality dismounted boards, assembling and soldering, parameters of components under different environmental circumstances. The practical part is carried out in cooperation with the department EEG in R&D Automotive Lighting Jihlava. It is dedicated to the design and the preparation of development samples where the quality is assessed according to given methodology from the theoretical part. PCB are analyzed by an X-ray, metallographic grinding and other methods. Recommendations are given and based on results for improvements.
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Production of Multilayer PCB
Janda, Ondřej ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This master thesis introduces the problematics of multilayer printed circuit boards. Theoretical part is focused on materials used for production of multilayer PCB and their parameters. At the same time, it focuses on the pressing process of multi-layered PCB, the types of presses used and their advantages and disadvantages. Practical part describes the methodology and testing of the PCB to identify the reliability of chosen electrical parameters. Testing is aimed to simulate thermal stress during machine soldering and during thermal stress in the target environment.
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Sputtering of thin conductive layers
Sloboda, Alexander ; Vaněk, Jiří (referee) ; Zatloukal, Miroslav (advisor)
This bachelor’s thesis is focused on the issues of thin films, especially thin transparent conductive films, and their deposition on substrate surface. Methods of deposition, their pros and cons, construction of the NP12 sputtering device, fundamentals of a deposition of thin conductive films, using reactive magnetron sputtering, preparation of substrates before deposition and thermal processing of substrates after deposition are issues that are described in this thesis. Instruction manual for magnetron sputtering device NP12 was created. For the purpose of this thesis several samples were prepared by magnetron sputtering device NP12 with different process parameters. These experimentally created samples were evaluated with the help of XRD measurement, to determine the influence of annealing in a vacuum oven on a crystal lattice. Substrates were also analysed by scanning electron microscope to evaluate presence of chemical elements inside the thin films.
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Immersion Tin Surface Finish of PCB
Karzel, Vítězslav ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
The aim of this work is to study and more deeply understand everything about surface finishing of the printed circuit boards, that are used for lead-free soldering. Mainly we should focus on immersion tin and prepare some fundamental information for future measurement. Therefore, in the first part of the thesis is our main task is to create a~sufficient theoretical background for printed circuit boards, immersion tin and solderability. Then we are able to use previously created theoretical background to measure selected samples. Thereafter the measured data can be used for more strict evaluation, from which the results of measurement can be obtained.
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Gel polymer electrolytes with high fire safety
Musil, Michal ; Zatloukal, Miroslav (referee) ; Sedlaříková, Marie (advisor)
This work deals with preparation of PMMA based gel polymer electrolytes with high fire safety and high ionic conductivity. In the theoretical part of the work GPEs for Li – ion accumulators, fire safety tests, fire retardants are mentioned. Preparation of GPEs, electrical and other properties are described in the experimental part. Furthermore, new possible methods of gel preparation are discussed.
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