|
|
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.
|
|
|
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.
|
|
|
Li-ion accumulators charger
Vrba, Marek ; Zatloukal, Miroslav (referee) ; Garcia, Juan Bautista Arroyo (advisor)
The main target of this thesis is to design and realize a prototype of a high capacity battery charger. The charger has been designed as a switching power supply based on a Flyback convertor with two transistors. As switching transistors the integrated circuit IR2110 has been selected. The convertor is controlled by a microcontroller board based on ATMega328 called Arduino Uno; some parts of the Arduino Uno Starter Kit are also used as LCD display, relay and button. In addition, an auxiliary source has been made; this one powers the integration circuit IR2110 and Arduino Uno board. Furthermore, this work introduces us to the processes of charging lithium batteries, types of lithium batteries and methods of charging the lithium iron phosphate (LiFePO4) battery.
|
|
|
Conducting polymers and their use in supercapacitors
Gottwald, Tomáš ; Zatloukal, Miroslav (referee) ; Dvořák, Petr (advisor)
This work deals with the issues of using conducting polymers for supercapacitor electrodes and optimizing the technological process for their production. The work focuses on optimizing the amount of polymer used in order to achieve the most capacity. The methodology consists of creating an appropriate experimental electrode and subsequent measuring its associated capacity with BioLogic. This approach leads to creating charts which show the dependencies of capacity on the amount of polymer used.
|
|
|
Surface Finishes of Copper in PCBś Production
Bedlek, Marek ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This work examines and compares properties of different types of surface finishes, their qualities and shortcomings and perspective for future use. Emphasis is placed on new product in the field of OSP, Glicoat F2 from SHIKOKU CHEMICALS CORPORATION and immersion tin. It evaluates their influence on solderability and its changes after several reflow cycles and isothermal aging.
|
|
|
Thin film systems
Rada, Vojtěch ; Sedlaříková, Marie (referee) ; Zatloukal, Miroslav (advisor)
This bachelor’s thesis is focused on the problematics of thin-film technology. In the beginning the work deals with a general theory of this problematics, discusses various methods and ways to lay a thin film, where more emphasis is placed on magnetron sputtering, which is used in the practical part of the work, and describes procedures that are performed before and after the application of the thin film. The magnetron sputtering coating machine NP-12 and its control are described in the practical part of the work. Subsequently the selection and adjustment of suitable substrates is made, the thin-film system is deposited using the magnetron sputtering method and the analysis of the properties of deposited thin-film samples is done.
|
|
|
Inspection and optimization of soldering profiles of reflow furnaces
Flos, Milan ; Zatloukal, Miroslav (referee) ; Bača, Petr (advisor)
This thesis is focused on the implementation of solutions for the control of temperature profiles in an industrial environment. The theoretical part deals with the soldering process itself, individual types of soldering and their possible defects. Furthermore, the problem of temperature profiles, their division and the advantages and disadvantages of individual profiles were discussed. Subsequently, the measurement was performed on several remelting furnaces and its evaluation. Lastly, the design of the holder for the profilometer and the PCB itself was created.
|
|
|
Bismuth Low Temperature Solder Pastes
Hájka, Jan ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
This bachelor thesis deals with low-temperature solder pastes with different bismuth content. It focuses on material, process and environmental influences that affect the reliability of the soldered joint. The practical part investigates the effect of isothermal aging and thermal cycling on the mechanical properties of solder joints formed by an eutectic tin-bismuth alloy. Furthermore, tin-bismuth solder pastes are compared to pastes with additives (TiO2 nanoparticles) and to SAC305 alloy. Technical adjustments are made to the measuring device in order to increase the accuracy of the measurement.
|
|
|
E-learning for Technological projecting and logistic
Klimek, Martin ; Zatloukal, Miroslav (referee) ; Špinka, Jiří (advisor)
This bachelor’s thesis deals with computer aided design, production, and logistics. Further on it deals with types of companies, project management, problem solving in previously mentioned fields, methodology, and particular procedures of solving tasks of placement. Another objective of this particular bachelor’s thesis is to focus on the possibilities of multimedia instruction for subjects dealing with previously mentioned topics.
|
|
|
Implants for nervous system
Kuruc, Lukáš ; Zatloukal, Miroslav (referee) ; Sedlaříková, Marie (advisor)
This thesis deals with implants for nervous system. The first part of this thesis focuses on theoretical analysis of this issue, makes reader familiar with seriousness of spinal cord injury, its treatments options and regeneration with hydrogel implants. The second part describes experimental manufacturing of implants, testing patency and summary of their properties.
|
guest ::
