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Izdelava kapacitivnih tiskanih drsnikov
ID Pleša, Tanja (Author), ID Muck, Deja (Mentor) More about this mentor... This link opens in a new window

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Abstract
Tiskana elektronika postaja vedno bolj popularna na trgu zaradi številnih novih aplikacij, ki jih konvencionalna elektronika ne omogoča. Izdeluje se s klasičnimi tiskarskimi tehnikami. Za tisk se uporabljajo funkcionalni tiskarski materiali z različnimi prevodnimi lastnostmi: prevodni, polprevodni in dielektrični. Prednost tiskane elektronike je, da se lahko izdeluje tudi na fleksibilne tiskovne materiale, kot so folije, tekstil in papir. Izdelava tiskane elektronike na papir predstavlja izziv, saj je ta živ material. Glavno težavo predstavljata hrapavost in higroskopičnost papirja. V času magistrskega dela smo uspešno izdelali prototip natisnjenega kapacitivnega drsnika oz. drsnega stikala na tri različne tiskovne materiale. Spremljali smo vpliv lastnosti tiskovnega materiala na delovanje tiskanih kapacitivnih drsnih stikal. Tiskali smo na recikliran papir, specialni papir za tiskano elektroniko in sintetični papir. Tiskovnim materialom smo izmerili vsebnost vlage, hrapavost, absorpcijo tiskarske barve, kontaktni kot in električno upornost ter opazovali, kakšen vpliv imajo naštete lastnosti tiskovnega materiala na delovanje končne naprave. Izdelali in primerjali smo 8 dizajnov za tiskano kapacitivno drsno stikalo in z merjenjem kapacitivnosti med elektrodami drsnih stikal določili najbolj optimalen dizajn. Izbrani dizajn smo povezali z razvojnim kitom, kjer smo konvencionalno drsno stikalo zamenjali z natisnjenim. Preko programa smo odčitali moč signala, ki ga prejme čip ob dotiku, in ugotovili, da ima natisnjeno drsno stikalo močnejši signal od konvencionalnega. Primerjava delovanja natisnjenih kapacitivnih senzorjev je pokazala, da kljub velikim razlikam med tiskovnimi materiali v moči signala in delovanju med kapacitivnimi drsnimi stikali ni očitnih razlik.

Language:Slovenian
Keywords:tiskana elektronika, kapacitivni senzorji, kapacitivna drsna stikala, sitotisk
Work type:Master's thesis/paper
Organization:NTF - Faculty of Natural Sciences and Engineering
Year:2018
PID:20.500.12556/RUL-102948 This link opens in a new window
Publication date in RUL:12.09.2018
Views:1064
Downloads:269
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Secondary language

Language:English
Title:Fabrication of capacitive sliders
Abstract:
Printed electronics is gaining traction on the market because of many new interesting applications that conventional electronics just cannot reach. Traditional printing techniques are used to make printed electronics. Functional materials with different conductive properties are used for printing: conductive, semiconductive, and dielectric materials. The main advantage of printed electronics is the possibility of printing on flexible substrates such as foil, textiles, and paper. Fabrication of printed electronics on paper is challenging because the paper is a living material. The problem is that paper has higher roughness and it is hygroscopic. In this master's thesis, a prototype of the printed capacitive slider has been printed on three different substrates. The impact of the paper substrate on the functioning of the slider was studied. Substrates were analyzed according to their moisture content, roughness, ink absorption, contact angle and electrical resistance. Furthermore, eight different designs for printed capacitive sliders were designed. The capacitance between the sliders electrodes was measured. The design with the highest capacitance was selected for further research. The capacitive slider with the selected design was connected to a development kit and compared to a commercial one. The conventional capacitance slider on the development kit was replaced with the printed one. Using the electrotechnical program, signal strength on the chip was measured when the slider was touched. The measurements showed that the printed capacitive slider has better signal strength compared to the commercial slider. On the other hand, the comparison of different substrates of the printed capacitive sliders showed that the substrate has no influence on the functioning of printed capacitive sliders.

Keywords:printed electronics, paper electronics, capacitive sensors, capacitive sliders

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