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Lighting unit for PCB production
Hybler, Matěj ; Harabiš, Vratislav (referee) ; Balogh, Jaroslav (advisor)
The thesis deals with the design of microcontroller driven lighting unit for the printed circuit board creation, using exposure of the applied layer of the photoresistive material. Main part is dedicated to design of the control unit, which can be operated either in automatic or manual mode, then its source code for microcontroller written in C language and the selection of suitable source of UV radiation. It also describes the design of the entire device, methods and results of individual measurements to determine the achievable quality of the resulting PCB.
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Two-photon photopolymerization with multiple laser beams
Skalický, Jiří ; Pilát,, Zdeněk (referee) ; Jákl,, Petr (advisor)
Photopolymerization is a technique used to create surface structures or microobjects from a photoresist. This process is started by illuminating the sample with a light of proper wavelength absorbed by the resist. After exposure, the sample is processed according to the type of the photoresist – be it heating, treating with developer or just washing the unaffected monomer with some reagent. Focused femtosecond laser beam with double wavelength can be used in the process. Short pulse length with high photon density starts two-photon absorption localized in the vicinity of focal point. The method resolution is thus increased and details with 1/10 micrometer size can be created. Moreover, very short laser pulse decreases the heat affected zone and the risk of thermal initiation is minimized. Manufacturing of larger structures composed of tiny details with two-photon photopolymerization is time-demanding process. Therefore, we have complemented the optical setup with spatial light modulator (SLM), which splits the incoming laser beam into several beams with holograms dynamically generated by a computer. Polymerization can be thus performed by multiple foci simultaneously which can be used to create separated microparticles or periodical surface structures. Additional speed improvement of the process can be substitution of static configuration, requiring sample replacement after each exposition, with continuous setup using microfluidic channel steadily supplied with photoresist transported to the active region of the sample.
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Application of Conductive Inks and Low Temperature Sintered Pastes in PCB Production
Kolek, Andrej ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
The present masters's thesis informs about the development and application of low-temperature sintering pastes in the manufacture and assembly of PCB components of the enclosing lead-free using nanoparticles of metals and their compounds. Lead-free brazing technology which s using in the present time, which has its drawbacks, however, and thus gaining other appropriate alternatives that seek to replace or further refined lead brazing. The introduction of the theoretical part inform about retrieval method of the type, composition and properties of low-temperature sintering pastes consisting of metal nanoparticles and their compounds. This section describes and explains the reaction mechanisms taking place during the sintering process. The end of the first chapter is dedicated to nanotechnology and production of nanoparticles and their compounds for the needs of the low-temperature sintering and possible related problems. Folowing section is devoted to examples of practitioners of the application and use of low-temperature sintering pastes and tests with which to assess the characteristics and quality of the related sintering conection. At the end of the thesis is a summary perspective and the use of low-temperature sintering technology nanoparticle past into the future. The experimental part is devoted to the application of conductive ink on the base of graphite for the production of 1V, 2V and 4V structures and their electroplated by the copper. There were created technological processes of 2V and 4V structures and test proposed methodologies resistance conductive theme to environmental influences. Filling pasta was tested in implementing 4V structure. There were made microsections various technological applications and their results were processed and evaluated.
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Optimization of PCB Process Developing and Etching
Nerušil, Petr ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
Bachelor´s thesis deals with photoresist developing and copper etching – these ones are the key operations in the double layer PCB production realised with pattern plating subtractive technique. Test pattern and a schematic diagram of the technological process for quality control in the practical part. Main part of this thesis is focused to operations of photoresist developing and to inspection and evaluation of photoresist width changes on test pattern during developing and etching including copper etch factor.
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Photoresist exposure via the LCD panel
Fiala, Matouš ; Starý, Jiří (referee) ; Vyroubal, Petr (advisor)
The bachelor thesis deals with the design and development of a device using a liquid crystal display panel to create a motif when exposing a photoresist to ultraviolet radiation. For a functional design, it is essential to understand and comprehend the various components of the device, the physical principles and the control of the exposure process. The first part of the text is a theoretical summary that should introduce the reader to the issues discussed in the following sections. This is followed by an analysis and proposed solutions to specific obstacles related to the design and realization process of the device. The work includes manufacturing of a prototype device, the creation of the device software, and a user interface application through which the device is controlled. The thesis also contains simulations, a CAD model of the prototype, documentation and measured exposure results.
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Nanoelectrodes for biophysical measurements
Márik, Marian ; Hrdý, Radim (referee) ; Hubálek, Jaromír (advisor)
The aim of the project is formation of nanoelectrodes on the silicon wafer surface by thin-film techniques combined with lithography and nanotechniques developed in LabSensNano. Project is engaged in lithography and in preparation of silicon wafers. Furthermore is proposed a brief proposal of electrodes, proposal of realization and current state of the experiment.
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Laboratory Double Layer PCBś Production
Martykán, Lukáš ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
The content of this bachelor‘s thesis is laboratory production of two-layer printed circuit boards. It includes analysis of basic materials and types of boards in general. The main part focuses on the manufacture of printed circuit boards using the panel plating. In particular, theoretical analysis technology drilling, hole plating, photo resist processing and etching. The practical part is examining the impact speed of drill bit rotation during hole drilling, electroplating copper holes. Microsections are realised and evaluated.
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Exposure equipment for PCBs
Fiala, Matouš ; Čech, Ondřej (referee) ; Vyroubal, Petr (advisor)
The Master's thesis deals with the fabrication of printed circuit board exposure devices, including establishing a theoretical basis for understanding the PCB production process, using lithography over a liquid crystal panel to create a motif. The thesis includes the creation of a CAD model of the device, including a UV source and then thermal simulation of the cooling of the device. The fabrication of the device also involved the creation of a custom motherboard that integrates all of the electronic components. The main result of this work is an assembled functional device with a unique LCD layer arrangement that allows reliable exposure of dual-layer PCBs, which is supported by testing. The most comprehensive part of this thesis deals with the development of a complete software platform, consisting of an application running on the microcomputer of the exposure device and a multi-platform application through which the device is wirelessly controlled.
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Photoresist exposure via the LCD panel
Fiala, Matouš ; Starý, Jiří (referee) ; Vyroubal, Petr (advisor)
The bachelor thesis deals with the design and development of a device using a liquid crystal display panel to create a motif when exposing a photoresist to ultraviolet radiation. For a functional design, it is essential to understand and comprehend the various components of the device, the physical principles and the control of the exposure process. The first part of the text is a theoretical summary that should introduce the reader to the issues discussed in the following sections. This is followed by an analysis and proposed solutions to specific obstacles related to the design and realization process of the device. The work includes manufacturing of a prototype device, the creation of the device software, and a user interface application through which the device is controlled. The thesis also contains simulations, a CAD model of the prototype, documentation and measured exposure results.
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Two-photon photopolymerization with multiple laser beams
Skalický, Jiří ; Pilát,, Zdeněk (referee) ; Jákl,, Petr (advisor)
Photopolymerization is a technique used to create surface structures or microobjects from a photoresist. This process is started by illuminating the sample with a light of proper wavelength absorbed by the resist. After exposure, the sample is processed according to the type of the photoresist – be it heating, treating with developer or just washing the unaffected monomer with some reagent. Focused femtosecond laser beam with double wavelength can be used in the process. Short pulse length with high photon density starts two-photon absorption localized in the vicinity of focal point. The method resolution is thus increased and details with 1/10 micrometer size can be created. Moreover, very short laser pulse decreases the heat affected zone and the risk of thermal initiation is minimized. Manufacturing of larger structures composed of tiny details with two-photon photopolymerization is time-demanding process. Therefore, we have complemented the optical setup with spatial light modulator (SLM), which splits the incoming laser beam into several beams with holograms dynamically generated by a computer. Polymerization can be thus performed by multiple foci simultaneously which can be used to create separated microparticles or periodical surface structures. Additional speed improvement of the process can be substitution of static configuration, requiring sample replacement after each exposition, with continuous setup using microfluidic channel steadily supplied with photoresist transported to the active region of the sample.
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