Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583876
S. Tokito
The latest developments in flexible and printed electronics technology based on organic thin-film transistor (OTFT) devices as well as printable electronic materials are briefly reported on in this paper. The successful fabrication and operation of printed OTFT devices and a variety of integrated circuit applications such as flip-flop logic gates and operational amplifiers will be demonstrated.
{"title":"Flexible Printed Organic Thin-Film Transistor Devices and Integrated Circuit Applications","authors":"S. Tokito","doi":"10.1109/IFETC.2018.8583876","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583876","url":null,"abstract":"The latest developments in flexible and printed electronics technology based on organic thin-film transistor (OTFT) devices as well as printable electronic materials are briefly reported on in this paper. The successful fabrication and operation of printed OTFT devices and a variety of integrated circuit applications such as flip-flop logic gates and operational amplifiers will be demonstrated.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"22 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75464085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8584025
D. Ban
Nanowire based nanogenerators are fabricated on flexible substrates, which convert mechanical energy to electrical energy. The energy harvesting performance of the devices is significantly improved by optimizing the doping concentration of the nanowires and by integrating a nanocrystalline/amorphous Si:H single junction solar cell.
{"title":"Nanogenerators on Flexible Substrates","authors":"D. Ban","doi":"10.1109/IFETC.2018.8584025","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8584025","url":null,"abstract":"Nanowire based nanogenerators are fabricated on flexible substrates, which convert mechanical energy to electrical energy. The energy harvesting performance of the devices is significantly improved by optimizing the doping concentration of the nanowires and by integrating a nanocrystalline/amorphous Si:H single junction solar cell.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"8 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82071108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583959
Teng Cheng, Li-Kang Wang, Pedro Cheong, S. Ho, Wai‐Wa Choi, Guang-Hua Yang, K. Tam
This paper proposed a Ultra-Wide Band (UWB) chipless radio frequency identification (RFID) tag. This tag consists of integrated microstrip and slot cross-shaped resonators with stub to realize compact multi-bit design. These stubs can provide transmission zeros which are controlled independently. A prototype of four-bit chipless tag is fabricated on RO6010 with 10.8 dielectric constant. The simulation and measured results are in good agreement.
{"title":"Design of UWB Chipless RFID Tag using Microstrip and Slot Cross-shaped Resonators","authors":"Teng Cheng, Li-Kang Wang, Pedro Cheong, S. Ho, Wai‐Wa Choi, Guang-Hua Yang, K. Tam","doi":"10.1109/IFETC.2018.8583959","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583959","url":null,"abstract":"This paper proposed a Ultra-Wide Band (UWB) chipless radio frequency identification (RFID) tag. This tag consists of integrated microstrip and slot cross-shaped resonators with stub to realize compact multi-bit design. These stubs can provide transmission zeros which are controlled independently. A prototype of four-bit chipless tag is fabricated on RO6010 with 10.8 dielectric constant. The simulation and measured results are in good agreement.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"40 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85636211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583928
Lingju Meng, Qiwei Xu, Li Dan, Xihua Wang
Flexible electronics, as a cutting-edge field in modern electronics, has drawn more and more attentions for its applications in internet-of-things. Flexible touch sensors, as one type of fundamental devices, always play a significant role in this field. Here, we reported a flexible touch panel combing single-walled carbon nanotubes and triboelectric effect to reach high performance.
{"title":"Triboelectric flexible sensors employing single-walled carbon nanotube field-effect transistors","authors":"Lingju Meng, Qiwei Xu, Li Dan, Xihua Wang","doi":"10.1109/IFETC.2018.8583928","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583928","url":null,"abstract":"Flexible electronics, as a cutting-edge field in modern electronics, has drawn more and more attentions for its applications in internet-of-things. Flexible touch sensors, as one type of fundamental devices, always play a significant role in this field. Here, we reported a flexible touch panel combing single-walled carbon nanotubes and triboelectric effect to reach high performance.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"10 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82745191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583987
QingLe Zhang, Y. Kuo, Nidhi Mishra, A. Shamim
This paper presents a planar flexible transmitter antenna with quasi-isotropic radiation for the RF communication of marine animals tagging system. By adjusting the lengths of the two perpendicular monopoles, a 90° quadrature with each other is achieved and therefore this transmitter antenna can provide a near-isotropic radiation. And this transmitter system is simulated and fabricated on flexible polydimethylsiloxane (PDMS) substrate, which can be mounted on marine animal body surfaces. The simulated difference between the maximum and minimum radiation (gain deviation) is 4.75dB for planar condition and 6.2dB for bending condition at 2.4GHz.
{"title":"Flexible Quasi-Isotropic Antenna for Marine Animals Tagging application","authors":"QingLe Zhang, Y. Kuo, Nidhi Mishra, A. Shamim","doi":"10.1109/IFETC.2018.8583987","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583987","url":null,"abstract":"This paper presents a planar flexible transmitter antenna with quasi-isotropic radiation for the RF communication of marine animals tagging system. By adjusting the lengths of the two perpendicular monopoles, a 90° quadrature with each other is achieved and therefore this transmitter antenna can provide a near-isotropic radiation. And this transmitter system is simulated and fabricated on flexible polydimethylsiloxane (PDMS) substrate, which can be mounted on marine animal body surfaces. The simulated difference between the maximum and minimum radiation (gain deviation) is 4.75dB for planar condition and 6.2dB for bending condition at 2.4GHz.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"109 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82400812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583995
Cong Wang, B. Xu, J. Terry, Stewart Smith, A. Walton, Yifan Li
This paper reports the metal-elastomer surface deformation control strategy of a strain transducer array capable of measuring compressive strains up to 60%. Pairs of multi-finger electrodes separated by different inter-digit gap distances are forced into contact by induced surface creasing deformation at different strains. Test structures have been developed to explore and optimize the electrode-elastomer hybrid surface deformation. The deformation is due to large compressive strains in the “x-direction” but stretching caused by the Poisson effect can also take place in the “y-direction”.
{"title":"Metal-Elastomer Surface Deformation Control on Super-Compressible Strain Transducer Arrays","authors":"Cong Wang, B. Xu, J. Terry, Stewart Smith, A. Walton, Yifan Li","doi":"10.1109/IFETC.2018.8583995","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583995","url":null,"abstract":"This paper reports the metal-elastomer surface deformation control strategy of a strain transducer array capable of measuring compressive strains up to 60%. Pairs of multi-finger electrodes separated by different inter-digit gap distances are forced into contact by induced surface creasing deformation at different strains. Test structures have been developed to explore and optimize the electrode-elastomer hybrid surface deformation. The deformation is due to large compressive strains in the “x-direction” but stretching caused by the Poisson effect can also take place in the “y-direction”.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"305 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76368090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583996
Mohamed A. M. Seliem, Khalid Elgazzar
The IPv6 Low-power Wireless Personal Area Networks (6LoWPAN) is a key technology to the realization of Wireless Embedded Internet [1]. However, the 6LoWPAN link [2] is characterized as lossy, low power, low-bit-rate, and short-range communications. It is common with such constraints that many nodes attempts to save their energy through long sleeping periods. This paper presents a novel deployment strategy for a self-sustained network of IPv6 devices. The major focus is on the optimization of the communication protocol stack for Wireless Sensor Networks (WSN) to support nodes on sleeping mode. Recently, significant efforts have been made towards the standardization of the IoT protocol stack [3], which mostly has been implemented on the popular Contiki operating system. The protocol stack has been enhanced by implementing an optimized version of the Neighbor Discovery Protocol [4]. The usage of the Contiki MAC Radio Duty Cycling Protocol notably reduces and improves the energy consumption of network nodes. In our deployment prototype, each node is equipped with a rechargeable battery and a small solar panel to harvest the ambient light while performing measurements. Preliminary results demonstrate that the proposed node architecture and protocol stack optimization provide 15x fold of energy saving compared to base architecture with no stack optimization.
{"title":"A Self Sustaind 6LoWPAN of a Sleepy Multi-Sensors with OND Support","authors":"Mohamed A. M. Seliem, Khalid Elgazzar","doi":"10.1109/IFETC.2018.8583996","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583996","url":null,"abstract":"The IPv6 Low-power Wireless Personal Area Networks (6LoWPAN) is a key technology to the realization of Wireless Embedded Internet [1]. However, the 6LoWPAN link [2] is characterized as lossy, low power, low-bit-rate, and short-range communications. It is common with such constraints that many nodes attempts to save their energy through long sleeping periods. This paper presents a novel deployment strategy for a self-sustained network of IPv6 devices. The major focus is on the optimization of the communication protocol stack for Wireless Sensor Networks (WSN) to support nodes on sleeping mode. Recently, significant efforts have been made towards the standardization of the IoT protocol stack [3], which mostly has been implemented on the popular Contiki operating system. The protocol stack has been enhanced by implementing an optimized version of the Neighbor Discovery Protocol [4]. The usage of the Contiki MAC Radio Duty Cycling Protocol notably reduces and improves the energy consumption of network nodes. In our deployment prototype, each node is equipped with a rechargeable battery and a small solar panel to harvest the ambient light while performing measurements. Preliminary results demonstrate that the proposed node architecture and protocol stack optimization provide 15x fold of energy saving compared to base architecture with no stack optimization.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"30 4 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77481263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583926
Nishtha Wadhwa, J. Martins, P. Bahubalindruni, Sujay Deb, P. Barquinha
This paper presents a comparitive study of ring oscillators (RO) using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs) to implement on-chip clock generator for flexible electronic systems. A five-stage RO has been implemented with different inverter topologies using IGZO TFTs, which includes Diode connected load, Capacitive bootstrapping (BS), Pseudo-CMOS and Pseudo-CMOS bootstrapping architectures. These topologies have been simulated using in-house IGZO TFT models under similar conditions using different power supplies (10 V, 15 V and 20 V) in cadence environment. Among all architechtures Capacitive bootstrapping RO has ensured highest frequency of operation in the order of MHz and an output swing of 82% of VDD. Whereas, Pseudo-CMOS based RO provides the lowest power consumption in the order of μW with an output swing of 57% of VDD. On the other hand, the combination of Pseudo CMOS and bootstrapping has ensured highest voltage swing of 95% of VDD. In terms of power delay product (PDP) BS RO is superior with respect to other topologies. This work provides a clear insight to the designer to choose a particular topology for given application, mainly for on-chip clock generation for flexible electronic systems based on the requirements.
{"title":"A Comparitive Study of On-Chip Clock Generators Using a-IGZO TFTs for Flexible Electronic Systems","authors":"Nishtha Wadhwa, J. Martins, P. Bahubalindruni, Sujay Deb, P. Barquinha","doi":"10.1109/IFETC.2018.8583926","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583926","url":null,"abstract":"This paper presents a comparitive study of ring oscillators (RO) using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs) to implement on-chip clock generator for flexible electronic systems. A five-stage RO has been implemented with different inverter topologies using IGZO TFTs, which includes Diode connected load, Capacitive bootstrapping (BS), Pseudo-CMOS and Pseudo-CMOS bootstrapping architectures. These topologies have been simulated using in-house IGZO TFT models under similar conditions using different power supplies (10 V, 15 V and 20 V) in cadence environment. Among all architechtures Capacitive bootstrapping RO has ensured highest frequency of operation in the order of MHz and an output swing of 82% of VDD. Whereas, Pseudo-CMOS based RO provides the lowest power consumption in the order of μW with an output swing of 57% of VDD. On the other hand, the combination of Pseudo CMOS and bootstrapping has ensured highest voltage swing of 95% of VDD. In terms of power delay product (PDP) BS RO is superior with respect to other topologies. This work provides a clear insight to the designer to choose a particular topology for given application, mainly for on-chip clock generation for flexible electronic systems based on the requirements.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"17 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81754779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583994
Weiwei Li, Xiao Feng, A. Rasheed, E. Iranmanesh, Kai Wang
A flexible tactile sensor consisting of an array of mechanical-field-coupled thin-film transistors (MFCTFTs) is presented. By laminating a PVDF film with an array of dual-gate TFTs, the flexible tactile sensor array is formed. To improve the sensitivity, a 3-D channel structure is implemented in the TFT. The force-induced deformation can be mapped in the 2×2 pixelated array, making it promising for electronic skin applications in robotics.
{"title":"A 2×2 Flexible Tactile Sensor Array Based on Mechanical-Field-Coupled TFTs","authors":"Weiwei Li, Xiao Feng, A. Rasheed, E. Iranmanesh, Kai Wang","doi":"10.1109/IFETC.2018.8583994","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583994","url":null,"abstract":"A flexible tactile sensor consisting of an array of mechanical-field-coupled thin-film transistors (MFCTFTs) is presented. By laminating a PVDF film with an array of dual-gate TFTs, the flexible tactile sensor array is formed. To improve the sensitivity, a 3-D channel structure is implemented in the TFT. The force-induced deformation can be mapped in the 2×2 pixelated array, making it promising for electronic skin applications in robotics.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"25 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87176879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-01DOI: 10.1109/IFETC.2018.8583905
Haixiang Sun, G. Xiao, Stephen Lang, Zhiyi Zhang, Y. Tao
Screen printed silver conductive tracks have been used or are being explored for applications in membrane switches, solar cells, radio frequency identification (RFID) antennas, diabetic testing strips, sensors etc. For many of these applications, optimizing the electric conductivity of the printed tracks is crucial. It has been noticed that the electric conductivity of the printed conductive tracks are highly dependent on the post-processing conditions. However, the understanding of the effect is limited. In this paper, preliminary study results show that ambient temperature drying followed by heat treatment offers the lowest resistance (highest conductance) for printed conductive tracks.
{"title":"Optimizing the Electrical Conductivity of Screen Printed Silver Conductive Tracks by Post Treatment","authors":"Haixiang Sun, G. Xiao, Stephen Lang, Zhiyi Zhang, Y. Tao","doi":"10.1109/IFETC.2018.8583905","DOIUrl":"https://doi.org/10.1109/IFETC.2018.8583905","url":null,"abstract":"Screen printed silver conductive tracks have been used or are being explored for applications in membrane switches, solar cells, radio frequency identification (RFID) antennas, diabetic testing strips, sensors etc. For many of these applications, optimizing the electric conductivity of the printed tracks is crucial. It has been noticed that the electric conductivity of the printed conductive tracks are highly dependent on the post-processing conditions. However, the understanding of the effect is limited. In this paper, preliminary study results show that ambient temperature drying followed by heat treatment offers the lowest resistance (highest conductance) for printed conductive tracks.","PeriodicalId":6609,"journal":{"name":"2018 International Flexible Electronics Technology Conference (IFETC)","volume":"51 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90054395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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