Abstract
In this work, we present a do-it-yourself (DIY) approach for the environmental-friendly fabrication of printed electronic devices and sensors. The setup consists only of an automated handwriting robot and pens filled with silver conductive inks. Here, we thoroughly studied the fabrication technique and different optimized parameters. The best-achieved results were 300 mΩ/sq as sheet resistance with a printing resolution of 200 µm. The optimized parameters were used to manufacture fully functional electronics devices: a capacitive sensor and a RFID tag, essential for the remote reading of the measurements. This technique for printed electronics represents an alternative for fast-prototyping and ultra-low-cost fabrication because of both the cheap equipment required and the minimal waste of materials, which is especially interesting for the development of cost-effective sensors.
Highlights
Our observations show that lines narrower than 200 μm can be written, the likelihood for failures increases, especially for what concerns the straightness of the lines
The average thickness of the silver layer was circa 165 nm; the hatching pattern significantly affects the sheet resistance due to the route taken by the pen, and the way in which the particles agglomerate and the total amount of material deposited on the substrate
We studied automatized handwriting techniquehandwriting based on balltechnique pens
Summary
The AxiDraw robot is a precise and versatile pen plotter; it is normally used to create for example postcards, invitations, or drawings. In order to obtain satisfying results, a number of different pens, as well as varying substrates, have been investigated. In order to obtain satisfying results, a number of different pens, as wel as varying substrates, been investigated. Thisthe section describes the and methods and actions that were performed within have this work, including both, handwritten tests, actions that were performed within this work, including both, the handwritten tests, and primarily the writings executed by the AxiDraw robot. The handwriting tests showed quite uniform lines, especially compared to found for ball pens. When non-printing, the ink slightly dries on the pen’s tip, causingpen its blocking in the fridge with the the tip pen pointing helps with this issue. Following the results of the optimization of sheet resistance for the same silver ink [34], we used a pulse width of 500 μs and a periodicity of 1 s for 15 times at 2.1 W
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