Dielectric and electroacoustic assessment of screen-printed piezoelectric polymer layers as flexible transducers: Influence of the electrode material

Qiu, Xunlin; Benjamin, Aravindan Joseph; Venkatesan, Thulasinath Raman; Schmidt, G.; Quintana, Ricardo; Panicker, Pramul Muraleedhara; Gerhard, Reimund; Hübler, Arved C.

doi:10.1109/tdei.2020.008864

Cited by 3 publications

(4 citation statements)

References 23 publications

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“…The SPL was recorded at a distance of 10 cm. It is worth mentioning that, despite the flat mounting of the device, which is in contrast to our former publications on printed piezoelectric loudspeakers [ 23 , 24 , 30 , 31 , 34 ] and the compact size of the transducer, a remarkably high SPL of more than 90 dB was achieved for a wide frequency range from ~2 kHz to 17 kHz. For the haptics application, the low frequency range between 100 and 500 Hz is important.…”

Section: Resultsmentioning

confidence: 75%

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Printed Multilayer Piezoelectric Transducers on Paper for Haptic Feedback and Dual Touch-Sound Sensation

Schmidt

Werner

Weissbach

et al. 2022

Sensors

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With a growing number of electronic devices surrounding our daily life, it becomes increasingly important to create solutions for clear and simple communication and interaction at the human machine interface (HMI). Haptic feedback solutions play an important role as they give a clear direct link and response to the user. This work demonstrates multifunctional haptic feedback devices based on fully printed piezoelectric transducers realized with functional polymers on thin paper substrate. The devices are flexible; lightweight and show very high out-of-plane deflection of 213 µm at a moderate driving voltage of 50 Vrms (root mean square) achieved by an innovative multilayer design with up to five individually controllable active layers. The device creates a very clear haptic sensation to the human skin with a blocking force of 0.6 N at the resonance frequency of 320 Hz, which is located in the most sensitive range of the human fingertip. Additionally the transducer generates audible information above two kilohertz with a remarkable high sound pressure level. Thus the paper-based approach can be used for interactive displays in combination with touch sensation; sound and color prints. The work gives insights into the manufacturing process; the electrical characteristics; and an in-depth analysis of the 3D deflection of the device under variable conditions

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Section: Resultsmentioning

confidence: 75%

“…For the resonant frequency, the total harmonic distortion was measured to be ~50%. This value is much higher than the total harmonic distortion measured for frequencies above 500 Hz for printed piezoelectric speakers on paper, which is typically below 1% [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

Printed Multilayer Piezoelectric Transducers on Paper for Haptic Feedback and Dual Touch-Sound Sensation

Schmidt

Werner

Weissbach

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

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“…As the poling procedure requires high electric field strength of more than 50 MV m −1 which is a typical value for the coercive field of P(VDF‐TrFE), this process step is challenging as small inhomogeneities like pinholes in the piezoelectric layer or roughness peaks of the electrodes caused by the paper surface can lead to a local electrical breakdown damaging the whole device. Polymer electrodes demonstrated already much better polarization potential in comparison to metallic ones, [ 24 ] but the polarization of paper‐embedded laminated piezoelectric devices has not been published so far.…”

Section: Figurementioning

confidence: 99%

Paper‐Embedded Roll‐to‐Roll Mass Printed Piezoelectric Transducers

et al. 2021

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The trend to a world with ubiquitous electronics has the need for novel concepts for sensors and actuators that are lightweight, flexible, low‐cost, and also sustainable. Piezoelectric transducers on the basis of functional polymers can meet these expectations. In this work, a novel concept for paper‐embedded large‐area piezoelectric devices realized solely by means of roll‐to‐roll (R2R) mass printing and post printing technologies including inline poling are introduced. The device set‐up, as well as the process technology, offers the great opportunity for a cost‐efficient and environmentally friendly mass production of thin and flexible organic large‐area piezoelectric devices. As the functional layers are embedded into paper by the hot lamination of two poly(vinylidene fluoride‐co‐trifluoroethylene) P(VDF‐TrFE) layers, the printed electronics is protected and invisible. The paper gives insights to the R2R printing of a 500 m long web including R2R post printing processes and electrical and acoustic inline characterization. Fully R2R processed devices show a high remnant polarization of up to 78 mC m−2 and can be realized with high yield of >90%. Finally, a 360° surround‐sound installation realized with a 387 cm long paper web consisting of 56 piezoelectric speakers including wiring is presented.

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“…Of late, several printing technologies (such as roll-to-roll, [7][8][9][10] screen, [11][12][13] inkjet, [14][15][16] etc.) have been used to not only form and fabricate modern-day electronic devices and structures, but also to interconnect them directly on the polymer surfaces of flexible substrates with roughness in the order of micrometers.…”

Section: Introductionmentioning

confidence: 99%

Laue microdiffraction evaluation of bending stress in Au wiring formed on chip-embedded flexible hybrid electronics

Murugesan

Susumago

Sumitani

et al. 2021

Jpn. J. Appl. Phys.

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Au redistribution layers 10 to 100 μm wide were fabricated on heterogeneously integrated advanced flexible hybrid electronics (FHE) substrates formed by a die-first approach based on fan-out wafer-level packaging. The formed Au metal wiring was meticulously studied for locally induced mechanical stress upon bending (bending radius, BR 20 mm) using Laue microdiffraction (LμD) with synchrotron radiation. It was inferred from the LμD data that upon bending the FHE substrate up to the BR of 20 mm, the Au metal wiring (10 mm long, 100 μm wide, and 500 nm thick) experienced mechanical bending stress amounting to 250 ∼ 300 MPa. The stress values obtained from the LμD studies were close to the stress value of 350 MPa obtained by simulation.

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Dielectric and electroacoustic assessment of screen-printed piezoelectric polymer layers as flexible transducers: Influence of the electrode material

Cited by 3 publications

References 23 publications

Printed Multilayer Piezoelectric Transducers on Paper for Haptic Feedback and Dual Touch-Sound Sensation

Printed Multilayer Piezoelectric Transducers on Paper for Haptic Feedback and Dual Touch-Sound Sensation

Paper‐Embedded Roll‐to‐Roll Mass Printed Piezoelectric Transducers

Laue microdiffraction evaluation of bending stress in Au wiring formed on chip-embedded flexible hybrid electronics

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