Printed Embedded Transducers: Capacitive Touch Sensors Integrated Into the Organic Coating of Metalic Substrates

Sell, Johannes K.; Enser, Herbert; Jakoby, Bernhard; Schatzl-Linder, Michaela; Strauß, Bernhard; Hilber, Wolfgang

doi:10.1109/jsen.2016.2596791

Cited by 19 publications

(22 citation statements)

References 17 publications

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“…Optionally the sensor is then top-coated with another organic polymer layer utilizing spin-coating technology. This fabrication procedure was described in detail earlier ( [1,5]). The first and second strain gauge samples are printed with the following screen-print pastes: silver, (Henkel PF 050), and carbon black, (Henkel PR 406B).…”

Section: Methodsmentioning

confidence: 99%

Hysteresis and Material Effects of Printed Strain Gauges Embedded in Organic Coatings

Enser

Sell

Schatzl-Linder

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

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This work reports on the hysteresis behavior and an initial baseline drift of printed strain gauges embedded in organic coating layers on sheet steel that we recently introduced. We subsequently investigated the performance over an extended period of time, which revealed interesting and partially unexpected material properties of printed strain gauges made from silver and carbon. Both silver-and carbon-based strain gauges show a hysteresis behavior of the gauge factor and non-negligible nonlinear characteristics. Furthermore, the carbon-based sensors show a strong initial base line drift within the first 50-100 cycles. All three effects, namely hysteresis, nonlinear gauge factor and initial base line drift, are confirmed within their respective standard deviations.

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Section: Methodsmentioning

confidence: 99%

Hysteresis and Material Effects of Printed Strain Gauges Embedded in Organic Coatings

Enser

Sell

Schatzl-Linder

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

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“…Due to the inherent surface roughness of the used sheet metal and the pigmentation of the applied primers, the surface roughness of the substrate (given by the root-mean-squared deviation) is in the range of 1 µm. This is orders of magnitude higher than on other substrates normally used for the realization of printed transducers [9] and thus particularly challenging. The high surface roughness impedes the printing of very thin conductive layers and excludes certain applications of printed electronics, like, e.g., OLEDs (organic light emitting diode), which require uniform, defect-free layers with well-defined thicknesses.…”

Section: Sheet Metal As Substratementioning

confidence: 92%

“…We reported the realization of embedded capacitive sensors on steel substrate previously in [9]. As illustrated in Fig.…”

Section: Capacitive Sensors On Steelmentioning

confidence: 99%

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Printed transducers embedded in polymer coatings

Enser

Sell

Kulha

et al. 2018

Elektrotech. Inftech.

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We provide an overview on our recent work on embedded printed transducers. This includes the description of appropriate technologies as well as technological considerations for the integration of sensors and actuators into polymer coatings, e.g., of sheet metal. In particular, the integration of capacitive large area sensors, piezo-and pyroelectric layers, and strain gauges is discussed. The devised concept has the potential to introduce additional functionality to a variety of products without the need of significant changes to associated production processes.

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“…[1][2][3][4][5][6][7][8] For these wired grids, the number of discrete sensing locations scales with the square of the number of wired leads connecting to the edges of the sensing surface. For touch sensors on conventional electronic devices, standard manufacturing practices involve high-resolution printing, weaving, or semiconductor-based fabrication of wired grids.…”

Section: Introductionmentioning

confidence: 99%

Paper‐Based Resistive Networks for Scalable Skin‐Like Sensing

Zou

Chen

Liang

et al. 2018

Adv Elect Materials

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user interface. In other words, increasing resolution or adding sites for the detection of touch, generally requires augmenting the number of interconnects. With the exception of using a single electrode-based sensing technique to make natural and inanimate objects become user interfaces, there has been a lack of effort in the reduction of the number of wired leads required for scalable sensing of touch. [9] In contrast to electronic touch sensors, skin on humans/vertebrates uses hierarchical neural networks to transmit the relative spatial detection and intensity of force on fleshy surfaces to the brain. [10] These neural networks do not depend on having a pair of running wires for each location. Instead, they have developed mechanisms for sending spatial information about touch along the spinal cord. Inspired by this concept, Tee et al. presented a skininspired organic digital mechanoreceptor, which converted force-based stimuli into digital signals with varied frequencies to mimic the communication between biological mechanoreceptors and the brain. [11] Similarly, there are opportunities to build electrical networks to reduce the number of wired leads required for spatial detection of touch on synthetic electronic skins.The advancements in skin-like sensing with flexible electronics have moved toward the design and fabrication of active electronic components arrayed on flexible sheets with surface areas less than 10 cm in diameter. [12][13][14][15][16] For example, Someya and co-workers demonstrated an application of thin-film transistors in skin-like sensors capable of measuring distributed pressures over a 9 cm × 9 cm footprint. [12] The size of the sensors is typically dependent on the method of fabrication, and current skin-like sensors often cover small areas (i.e., much less area than that of human skin) because of the limited size of semiconductor-based wafers. As mentioned previously, the number of wired leads in conventional arrays of skin-like sensors increases with the square root of the number of buttons. While this scaling may appear favorable, there are still difficulties with making large sensing grids, as a larger quantity of traces requires more space for wired connections and multiplexed measurements.In this work, we present an approach to passive sensing for skin-like sensors consisting of tunable resistive networks and This work presents a unique approach to the design, fabrication, and characterization of paper-based, skin-like sensors that use patterned resistive networks for passive, scalable sensing with a reduced number of interconnects. When touched or wetted with water, the sensors in the resistive networks detect significant changes in electrical impedance. Fabricating these resistive networks and sensors in a single sheet of metallized paper reduces the number of distinct inputs/outputs to the arrayed sensors. For human-electrode interactions, circuit-based models guide the design/material processing of the resistive networks and selection of operating frequencies-typically ranging...

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Printed Embedded Transducers: Capacitive Touch Sensors Integrated Into the Organic Coating of Metalic Substrates

Cited by 19 publications

References 17 publications

Hysteresis and Material Effects of Printed Strain Gauges Embedded in Organic Coatings

Hysteresis and Material Effects of Printed Strain Gauges Embedded in Organic Coatings

Printed transducers embedded in polymer coatings

Paper‐Based Resistive Networks for Scalable Skin‐Like Sensing

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