Integrated ion sensor device applications based on printed hybrid material systems (Conference Presentation)

Author(s):  
Emil J. W. List-Kratochvil
2019 ◽  
Vol 28 (01n02) ◽  
pp. 1940012
Author(s):  
Zane Jamal-Eddine ◽  
Yuewei Zhang ◽  
Siddharth Rajan

Tunnel junctions have garnered much interest from the III-Nitride optoelectronic research community within recent years. Tunnel junctions have seen applications in several material systems with relatively narrow bandgaps as compared to the III-Nitrides. Although they were initially dismissed as ineffective for commercial device applications due to high voltage penalty and on resistance owed to the wide bandgap nature of the III-Nitride material systems, recent development in the field has warranted further study of such tunnel junction enabled devices. They are of particular interest for applications in III-Nitride optoelectronic devices in which they can be used to enable novel device designs which could potentially address some of the most challenging physical obstacles presented with this unique material system. In this work we review the recent progress made on the study of III-Nitride tunnel junction-based optoelectronic devices and the challenges which are still faced in the field of study today.


Seikei-Kakou ◽  
2019 ◽  
Vol 31 (9) ◽  
pp. 334-337
Author(s):  
Junji Akimoto ◽  
Hiroshi Nagata ◽  
Kunimitsu Kataoka ◽  
Tadayoshi Akao ◽  
Jun Akedo

2010 ◽  
Vol 296 (1) ◽  
pp. 170-175
Author(s):  
Tatiana D. Martins ◽  
Ines V. P. Yoshida ◽  
Teresa D. Z. Atvars

2014 ◽  
Vol 2014 ◽  
pp. 1-1
Author(s):  
Liang-Wen Ji ◽  
Sheng-Joue Young ◽  
Chih-Hung Hsiao ◽  
Artde Donald Kin-Tak Lam

2020 ◽  
Author(s):  
Moritz Liesegang ◽  
Tilmann Beck

Abstract The performance of electric sensors is continuously improving due to the demands of modern vehicles and electronic devices. Magnetic sensors are used in a wide field of applications. However, handling and mounting the typical high-performance rare earth permanent magnets are challenging due to their brittleness. A constant magnetic flux is a key property of the magnetic setup in many devices. State-of-the-art adhesive bonding of magnets in devices can cause problems due to the low durability and viscous behaviour of adhesive polymers, as the magnet may change its position and hence, the magnetic flux distribution in the magnetic setup changes.Ultrasonic welding is a powerful technique to join hybrid material systems quickly and reliably, providing high joint strength, even for brittle materials such as glasses, ceramics and rare earth permanent magnets. The latter is being investigated in this work for the first time. The ultrasonic welding process was adapted to join 316L stainless steel, representing potential components of magnetic devices, to Ni/Cu/Ni-coated Nd2Fe14B. In addition to directly joined steel/magnet-hybrids, ductile aluminium and nickel interlayers were used in order to enhance the joint strength. Process parameters were developed and evaluated considering the resulting shear strength of the joints. The highest shear strength of 35 MPa was achieved for 316L/Nd2Fe14B and 316L/Al/Nd2Fe14B, which is more than twice the shear strength of adhesively bonded joints of up to 20 MPa, according to the literature. The functional performance of the hybrid material systems, evaluated by the magnetic flux density of the hybrid material systems was the highest for directly bonded joints, and those with a nickel interlayer, which did not show any losses in comparison to the single magnet in its initial state. Joints with an aluminium interlayer showed losses of 3% and adhesively bonded joints showed losses of 7% of the magnetic flux density.In summary, the results of this work indicate that ultrasonic welding is a suitable technique to improve the production process and performance of magnetic devices.


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