Search results for: Matti Mantysalo

Items from 1 to 20 out of 57 results

article

Monolithic Fabrication of Metal‐Free On‐Paper Self‐Charging Power Systems

Yingchun Su, Han Xue, Yujie Fu, Shiqian Chen, more

Advanced Functional Materials > 34 > 24 > n/a - n/a

Self‐charging power systems (SCPSs) are envisioned as promising solutions for emerging electronics to mitigate the increasing global concern about battery waste. However, present SCPSs suffer from large form factors, unscalable fabrication, and material complexity. Herein, a type of highly stable, eco‐friendly conductive inks based on poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)...

article

Printed and Stretchable Triboelectric Energy Harvester Based on P(VDF‐TrFE) Porous Aerogel

Karem Lozano Montero, Remmi Calvo Guzman, Amit Tewari, Haiyang Zou, more

Advanced Functional Materials > 34 > 19 > n/a - n/a

Developing energy harvesting devices is crucial to mitigate the dependence on conventional and rigid batteries in wearable electronics, ensuring their autonomous operation. Nanogenerators offer a cost‐effective solution for enabling continuous operation of wearable electronics. Herein, this study proposes a novel strategy that combines freeze‐casting, freeze‐drying, and printing technologies to fabricate...

article

Hybrid Material Extrusion Process Optimization for Printability and Adhesion in 3D‐Printed Electronics

Zhao Fu, Teemu Salo, Remmi Calvo Guzman, Jukka Vanhala, more

Advanced Engineering Materials > 26 > 6 > n/a - n/a

Hybrid Material Extrusion In article number 2301714, Zhao Fu and co‐workers optimize the process of 3D printing of thermoplastic polyurethane, which also contributes to the high adhesion of the conductor printed onto it. The process parameters of layer height and printing temperature in the material extrusion of thermoplastic polyurethane are found to significantly affect the print quality, surface...

article

Hybrid Material Extrusion Process Optimization for Printability and Adhesion in 3D‐Printed Electronics

Zhao Fu, Teemu Salo, Remmi Calvo Guzman, Jukka Vanhala, more

Advanced Engineering Materials > 26 > 6 > n/a - n/a

3D printing exhibits strong potential in electronics manufacturing for its capability of manufacturing complex structures with a wide range of materials. However, thermoplastic polyurethane (TPU) has rarely been fabricated by 3D printing for electronics due to the limited understanding of its printability and the adhesion of the conductors on it. Herein, we invetigate the printability of TPU using...

article

Failure Mechanisms in Flip‐Chip Bonding on Stretchable Printed Electronics

Mohammad H. Behfar, Behnam Khorramdel, Arttu Korhonen, Elina Jansson, more

Advanced Engineering Materials > 23 > 12 > n/a - n/a

Accelerating progress in printed electronics technology transforms the future of the manufacturing process in industrial applications, consumer electronics, and healthcare products. However, real‐life applications demand for circuits and systems that are robust and can stay functional under strong and frequent mechanical deformations. Herein, both empirical and analytical approaches to gain insight...

article

Electrical Contacts in SOI MEMS Using Aerosol Jet Printing

Behnam Khorramdel, Altti Torkkeli, Matti Mantysalo

IEEE Journal of the Electron Devices Society > 2018 > 6 > 1 > 34 - 40

In this paper, an additive method to make electrical contacts in SOI MEMS devices with aerosol jet printing is introduced. Small grooves were etched to the frame of MEMS accelerometer in the same step with the active structure release. Aluminum ink was jetted to the trenches in wafer-level to bridge the device layer to the handle wafer with the minimum amount of material. After subsequent annealing,...

article

Screen-Printed Curvature Sensors for Soft Robots

Anastasia Koivikko, Ehsan Sadeghian Raei, Mahmoud Mosallaei, Matti Mantysalo, more

IEEE Sensors Journal > 2018 > 18 > 1 > 223 - 230

Castable elastomers have been used to fabricate soft robotic devices and it has been shown that the technique scales well from prototyping to mass manufacturing. However, similarly scalable techniques for integrating strain or curvature sensors into such devices are still lacking. In this paper, we show that screen-printed silver conductors serve well as curvature sensors for soft robotic devices...

chapter

Soft actuators with screen-printed curvature sensors

Anastasia Koivikko, Ehsan Sadeghian Raei, Veikko Sariola, Mahmoud Mosallaei, more

2017 IEEE SENSORS > 1 - 3

2017 IEEE SENSORS

Castable elastomers have been used to fabricate soft fluidic actuators and the technique scales well from prototyping to mass manufacturing. However, similarly scalable techniques for integrating strain or curvature sensors into such devices are still lacking. In this paper, screen-printed silver conductors are shown to serve as curvature sensors for soft fluidic actuators. The sensors are realized...

article

Capability Assessment of Inkjet Printing for Reliable RFID Applications

Jussi Putaala, Juha Niittynen, Jari Hannu, Sami Myllymaki, more

IEEE Transactions on Device and Materials Reliability > 2017 > 17 > 2 > 281 - 290

In this paper, inkjet-printed silver traces and interconnections produced with the print-on-slope technique were used in an radio-frequency identification (RFID) structure operating in the ultra-high-frequency range. Underfill material was used to attach silicon RFID chips onto flexible, 125-

${\mu }\text{m}$

-thick polymer substrates. The cured underfill was also used as a sloped surface for printing...

chapter

Fabrication and characterization of screen printed stretchable carbon interconnects

Mahmoud Mosallaei, Behnam Khorramdel, Mari Honkanen, Pekka Iso-Ketola, more

2017 IMAPS Nordic Conference on Microelectronics Packaging (NordPac) > 78 - 83

2017 IMAPS Nordic Conference on Microelectronics Packaging (NordPac)

Electronic devices that are deformable in arbitrary directions would open up a new generation of applications such as epidermal electronics, implantable electronics and soft robotics. It would not be feasible to fabricate them with conventional rigid materials. To make the electronics stretchable, one can miniaturize the functional units and link them by stretchable interconnects. In this paper, we...

article

Combination of E-Jet and Inkjet Printing for Additive Fabrication of Multilayer High-Density RDL of Silicon Interposer

Mika-Matti Laurila, Behnam Khorramdel, Matti Mantysalo

IEEE Transactions on Electron Devices > 2017 > 64 > 3 > 1217 - 1224

The additive nature and high resolution of electrohydrodynamic inkjet (E-jet) printing can be utilized for manufacturing micrometer scale conductive tracks such as those required in the high-density redistribution layers (RDLs) of silicon interposers used in electronics packaging for 3-D integration. Compared to the current lithographic fabrication method, this approach promises to increase the customizability...

article

Comparison of simple algorithms for estimating respiration rate from electrical impedance pneumography signals in wearable devices

Vala Jeyhani, Tiina Vuorinen, Matti Mäntysalo, Antti Vehkaoja

Health and Technology > 2017 > 7 > 1 > 21-31

Respiration rate (RR) is considered as a useful parameter in characterizing the health condition of a person. Among the methods used for respiration measurement, Electrical Impedance Pneumography (EIP) can be easily obtained in wearable applications due to the possibility of using the electrocardiography (ECG) electrodes for the EIP measurement. In the fast growing field of wearable devices, having...

article

RF measurements to pinpoint defects in inkjet-printed, thermally and mechanically stressed coplanar waveguides

Sami Myllymäki, Jussi Putaala, Jari Hannu, Esa Kunnari, more

Microelectronics Reliability > 2016 > 65 > C > 142-150

In this work 10-GHz-band RF measurement and microscopy characterizations were performed on thermally and mechanically long-term-stressed coplanar waveguides (CPW) to observe electrical and mechanical degradation in 1-mm-thick PPO/PPE polymer substrates with inkjet-printed Ag conductors. The structure contained two different CPW geometries in a total of 18 samples with 250/270μm line widths/gaps and...

chapter

High density R2R screen printed silver interconnections for hybrid system integration

Thomas M. Kraft, Lydia Leppanen, Terho Kololuoma, Sanna Lahokallio, more

2016 6th Electronic System-Integration Technology Conference (ESTC) > 1 - 6

2016 6th Electronic System-Integration Technology Conference (ESTC)

In this case study, we investigated the minimum line width and spacing for roll-to-roll (R2R) screen printed silver interconnections on polyethylene terephthalate (PET). This initial pilot investigation involved rotary screen printing 16 high density I/0 patterns while alternating pitch (150, 175, 200, and 250 µm) and nominal screen linewidth (50, 75, 100, 150 µm).

chapter

Printed, skin-mounted hybrid system for ECG measurements

Tiina Vuorinen, Antti Vehkaoja, Vala Jeyhani, Kai Noponen, more

2016 6th Electronic System-Integration Technology Conference (ESTC) > 1 - 6

2016 6th Electronic System-Integration Technology Conference (ESTC)

In this paper we report a design and fabrication process for a screen printed, skin-mounted hybrid system for electrocardiogram (ECG) measurements. The system consists of printed electrodes on a stretchable bandage substrate designed to be attached to the chest, an electronics module, and a data receiving device. The electronics unit is reversibly attached to the single-use electrode bandage to measure...

chapter

Testing and modeling the performance of stretchable screen printed UHF RFID tag under strain

Toni Bjorninen, Jari Suikkola, Leena Ukkonen, Matti Mantysalo

2016 IEEE International Symposium on Antennas and Propagation (APSURSI) > 465 - 466

2016 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

We characterize a passive UHF RFID tag based on a stretchable dipole antenna which is screen printed on ultra-thin polyurethane substrate with silver ink. Our results show that the change in the conductor properties due to strain is large enough to modify the electromagnetic properties of the antenna notably, yet small enough so that the tag retains high performance even under 20-% strain. By comparing...

chapter

Screen-Printed Stretchable Interconnects

Jari Suikkola, Timo Kankkunen, Pekka Iso-Ketola, Jukka Vanhala, more

2016 IEEE 66th Electronic Components and Technology Conference (ECTC) > 1650 - 1655

2016 IEEE 66th Electronic Components and Technology Conference (ECTC)

This article focuses on characterization of screen printed electrical interconnects for wearable applications. The interconnects are screen printed with stretchable silver-based ink on a thermoplastic polyurethane film. By optimizing the process parameters, we were able to fabricate 200 µm line widths with spacing of 200 µm. The average sheet resistance is 36.2 mΩ/□, however...

article

Evaluation of Aerosol, Superfine Inkjet, and Photolithography Printing Techniques for Metallization of Application Specific Printed Electronic Circuits

Mohammad Mashayekhi, Lee Winchester, Louise Evans, Tim Pease, more

IEEE Transactions on Electron Devices > 2016 > 63 > 3 > 1246 - 1253

Application specific printed electronic circuits (ASPECs) are the corresponding term with application-specified ICs for printed electronics. The same as any new technology, printed electronics is suffering from some restrictions in design and process technology aspects. An important stage in the ASPEC design is the final wiring of the organic thin-film transistor arrays or gate arrays to customize...

chapter

Inkjet-printed wireless epidermal electronics

Matti Mantysalo

2015 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) > 339

2015 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)

Quantified self-tools and eHealth services based on the Internet-of-Things (IoT) and big-data analyses have great business potential. Sensor nodes measure different physiological parameters and activities like movement, pressure wave, muscle activity, heart activity, body temperature, etc. These parameters are sent to a mobile device. A mobile application will give instant feedback and remedy actions...

chapter

Inkjet printed single layer high-density circuitry for a MEMS device

Mika-Matti Laurila, Ayat Soltani, Matti Mantysalo

2015 IEEE 65th Electronic Components and Technology Conference (ECTC) > 968 - 972

2015 IEEE 65th Electronic Components and Technology Conference (ECTC)

For example high-density redistribution layers (RDL) require narrow conductor width and low enough resistance. We have studied the applicability of an additive electrodynamic inkjet printer, Super Inkjet (SIJ), as a potential replacement for the current non-additive manufacturing method used in circuitry fabrication for MEMS devices. This was done by examining the topography of the printed lines and...

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INFONA - science communication portal

Search results for: Matti Mantysalo

Monolithic Fabrication of Metal‐Free On‐Paper Self‐Charging Power Systems

Printed and Stretchable Triboelectric Energy Harvester Based on P(VDF‐TrFE) Porous Aerogel

Hybrid Material Extrusion Process Optimization for Printability and Adhesion in 3D‐Printed Electronics

Hybrid Material Extrusion Process Optimization for Printability and Adhesion in 3D‐Printed Electronics

Failure Mechanisms in Flip‐Chip Bonding on Stretchable Printed Electronics

Electrical Contacts in SOI MEMS Using Aerosol Jet Printing

Screen-Printed Curvature Sensors for Soft Robots

Soft actuators with screen-printed curvature sensors

Capability Assessment of Inkjet Printing for Reliable RFID Applications

Fabrication and characterization of screen printed stretchable carbon interconnects

Combination of E-Jet and Inkjet Printing for Additive Fabrication of Multilayer High-Density RDL of Silicon Interposer

Comparison of simple algorithms for estimating respiration rate from electrical impedance pneumography signals in wearable devices

RF measurements to pinpoint defects in inkjet-printed, thermally and mechanically stressed coplanar waveguides

High density R2R screen printed silver interconnections for hybrid system integration

Printed, skin-mounted hybrid system for ECG measurements

Testing and modeling the performance of stretchable screen printed UHF RFID tag under strain

Screen-Printed Stretchable Interconnects

Evaluation of Aerosol, Superfine Inkjet, and Photolithography Printing Techniques for Metallization of Application Specific Printed Electronic Circuits

Inkjet-printed wireless epidermal electronics

Inkjet printed single layer high-density circuitry for a MEMS device

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