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In this work, a comparison between the electro-optical characteristics of CNT random networks obtained through inkjet printing and spray-deposition on flexible substrates is presented. Transmittance values are similar in both fabrication techniques; however, the sheet resistance of the inkjetted layers diverges significantly with respect to the reference spray-deposited thin film. To overcome this...
In this paper, the conductive grids were flexographic printed with solvent based conductive ink. Elastomeric plate with 45° grid of 30µm line and pitch of 0.4mm was prepared. Surface resistance and optical transmittance of the printed film were characterized by two-electrode method and UV-VIS-NIR spectrophotometer respectively. At a comparable transmission level (83% measured at 600nm, without substrate),...
We evaluated the flexibility of screen-printed silver (Ag) circuits under various sintering temperatures. The circuits were built on a polyimide (PI) film by a screen printing technique using Ag nanopaste (73 wt%, 24 nm in diameter, Ag nanoparticles). The sintering temperature was raised from 150 to 300°C while the sintering time was fixed at 30 min. The flexibility was measured by two different kinds...
The ultra-small form factor of the electronic components along with a reliable and inexpensive high-density interconnect technology are the key factors in bringing flexible electronics to the next level of miniaturization without compromising performance and substantially increasing production cost. The common thick-film methods used today to fabricate conductive trace patterns on flexible boards...
In this paper, multi-walled carbon nanotube (MWCNT) ink was selectively patterned by inkjet printing on substrates to form conductive traces and electrodes for interconnection application. MWCNT was firstly functionalized using concentrated acid and dispersed in deionized water to form a colloidal solution. Various concentrations of MWCNT were formulated to test the stability of the solution. The...
In this study, we fabricated in-plane thermoelectric micro-generators (4 mm times 4 mm) based on bismuth telluride thin films by using flash evaporation method. The thermoelectric properties of as-grown thin films are lower than those of bulk materials. Therefore the as-grown thin films were annealed in hydrogen at atmospheric pressure for 1 hour in a temperature range of 200 degC. to 400degC. By...
Thick film resistance and capacitance elements have recently come to be used in miniaturized and lightweight electronic instruments. The thick-film magnetic semiconductor (IMS), with a thickness of 80 ??m, is a sintered substance based on ferrite powder and a ruthenium compound. The TMS has both the ferromagnetic and the semiconducting properties of the ferrite and the ruthenium compound. The TMS...
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