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Design of Reflow Soldering Station for Reballing of BGA Packages
Janiš, Adam ; Szendiuch, Ivan (referee) ; Otáhal, Alexandr (advisor)
This thesis deals with the design of a soldering oven for BGA reballing in a nitrogen protective atmosphere. The principles of reflow soldering, the advantages of a nitrogen protective atmosphere on the quality of solder joints and the types of soldering devices are described. The BGA packages´ part consists of their characteristics, assembling methods, a rework and repair process and solder joint inspection methods. Design of the device, as well as heat flow simulations, are included in the experimental part and particularly it also describes the used structural elements and the principle of function of the individual parts of the device. At the end of this work, the soldering process was measured and the ability of the sample soldering was verified.
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Optimalization of soldering process on IR-400
Otáhal, Alexandr ; Nicák, Michal (referee) ; Szendiuch, Ivan (advisor)
This project deals with innovation of IR-400 equipment which is based on design and installation of temperature regulation, in both top and bottom side. This innovation enables adjustment of reflow temperature profile for repair and rework of SMD components by lead-free solder materials for both, FR4 and alumina substrates, as assembly of some special packages.
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Eco-design in electronics - directives and tools for optimizing
Chlup, Marian ; Brzobohatý, Jaromír (referee) ; Szendiuch, Ivan (advisor)
This diploma thesis deals with the problem of ecological design and optimization of electrical products. The theoretical part describes the ecodesign legislation and assessment tools. The practical part is deals with created software for evaluation and comparison of electrical products. I analyzed three flash drives, which are commonly used. In these flash drives analyze packages and these packages were evaluated and compared with software. The last section describes the problems of availability of the necessary information.
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Study of lead-free solder joints reliability
Pícha, Jan ; Starý, Jiří (referee) ; Szendiuch, Ivan (advisor)
The thesis deals with problems concerning lead free soldering especially the study of the structure of solder joints and their reliability. The thesis evaluates lead free solder alloys. The theoretical part includes basic principles of soldering and methods of investigating solder joints reliability. The experimental part deals with the impact of water cooling and vibration on solder joint structure. Both methods are tested and are evaluated with regard to their reliability. The used tests include X-ray inspection, optical inspection, mechanical tests, investigating joint structure with electrone microscope.
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Level Indicator for Water Reservoirs
Hluší, Martin ; Szendiuch, Ivan (referee) ; Hejátková, Edita (advisor)
This thesis addresses the issue of designing a device for evaluating the water level in water reservoirs. The research part of this thesis introduces and comapares types of level indicators in use. This thesis includes the description of designing the main logic for water level indication. The next chapter describes the program for the microcontroler and also adresses the choosing of the suitable Bluetooth module. Planning of the devices power suply layout with regard to longterm autonomous operation was also sorted out in the scope of this thesis. The mechanical structure of the device was designed based on the knowledge of the individual subsystems. Based on this mechanical structure, the printed circuid board was made. The application, specifically made for controling this water level indicator using mobile phone, was described in the end.
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Odor analysis program for experimental electronic nose
Janošíková, Pavla ; Szendiuch, Ivan (referee) ; Adámek, Martin (advisor)
This work deals with processing data acquired from sensory device known as electronic nose. The work introduces readers to a few possible designes of electronic noses and to some of the best known analysis for odor recognition that are used in food industry. The work focus on a principal component analysis and a creation of program that process data from a simple electronic nose. The program not only receives data, but it even saves them and process them for better clarity of results. Using this program it is possible to create a new database and identify an unknown sample if its data are already stored in database. The part of this work is an experiment to see if the created program is able to recognize some odors better then a human nose.
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Non-conventional Applications in Thick Film Technology
Krejčí, Pavel ; Řezníček, Michal (referee) ; Szendiuch, Ivan (advisor)
This work deals with issues of application of the thick film technology in the non-conventional field. It includes the essential core of this technology, the overview of producers focusing on manufacturing thick film pastes and concrete examples of application. The general aim is to present growing opportunity of non-conventional application of thick film to the reader and to stimulate the imagination towards inventing new applications. In the experimental part of this work a design of a planar inductor on organic and anorganic substrate is carried out using thick film technology, screen and paste for high resolution.
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Switching power supply for electron microscope
Jánešová, Daniela ; Szendiuch, Ivan (referee) ; Hejátková, Edita (advisor)
This thesis is about theory of switching power supplies and about a specific solution of switching power supply for electron microscope. In the beginning of the thesis are mentioned various solutions of part blocks of switching power supplies, their advanteges and disadvanteges, and their suitability for electron microscopy. In the next part of the thesis are described requirements and design scheme of switching power supply for scanning part of electron microscope. The thesis i also about technical solution and practical testing of the switching power supply and verification of its functions.
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