Evaluation of Low Cost Metallization Process for Power Electronic Modules by Wire Wedge Bond Process on Nickel/Copper and Nickel/Copper/Silver Pads

2019 ◽  
Vol 39 (1) ◽  
pp. 385-392 ◽  
Author(s):  
C. Biasotto ◽  
Luiz B. Isoda ◽  
Cibele S. Franco ◽  
Nelson Armigliato
Keyword(s):  
Low Cost ◽  
Power Electronic ◽  
Nickel Copper ◽  
Metallization Process

Low-Cost High-Speed Techniques for Real-Time Simulation of Power Electronic Systems

2007 ◽  
Author(s):  
R. E. Crosbie ◽  
J. J. Zenor ◽  
R. Bednar ◽  
D. Word ◽  
N. G. Hingorani
Keyword(s):  
Real Time ◽  
High Speed ◽  
Low Cost ◽  
Electronic Systems ◽  
Power Electronic ◽  
Real Time Simulation ◽  
Time Simulation

The optical spectrum of UVLED excitation using NTC nanometer particles to replace rare earth doping

MRS Advances ◽  
2019 ◽  
Vol 4 (33-34) ◽  
pp. 1895-1904
Author(s):  
Lihong Su ◽  
Kan Chen ◽  
Yongqiang Liu ◽  
ZiAo Zou ◽  
Lihua Su
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Optical Spectrum ◽  
Low Cost ◽  
Rare Earth Ions ◽  
Rare Earth Doping ◽  
Phosphor Material ◽  
Light Emitting ◽  
Luminescence Efficiency ◽  
Nickel Copper

Abstract:Ultraviolet light-emitting diodes (UVLEDs) with phosphor materials have considerable advantages over traditional illumination devices. Doping with rare earth ions can modify the optical spectrum of phosphor materials, but rare earths are very expensive. Thus, replacing rare earths with a common material would provide a great potential for the wide application in the future. In this study, we discovered that a novel type of semiconductor nanometre powder, namely manganese cobalt nickel copper oxide (MCNC), is able to emit blue-green wavelength spectrum when exited by 365-400nmUVLED. In addition, MCNC shows less attenuation of luminescence efficiency than other UVLED phosphor materials doped with rare earths with temperature increase. It is thus concluded that MCNC is a promising low-cost material to replace rare earths to adjust the optical spectrum wavelength of UVLED. This is the first time that nano-scale MCNC is reported to possess the property to change the optical spectrum wavelength of UVLED. This provides a new mechanical and nanometer phosphor material without rare earth doping to shift the wavelength spectrum.

High Breakdown Voltage GaN Power HEMT on Si Substrate

2013 ◽  
Vol 805-806 ◽  
pp. 948-953
Author(s):  
Cen Kong ◽  
Jian Jun Zhou ◽  
Jin Yu Ni ◽  
Yue Chan Kong ◽  
Tang Sheng Chen
Keyword(s):  
Breakdown Voltage ◽  
Low Cost ◽  
Electronic Devices ◽  
Power Electronic ◽  
Si Substrate ◽  
Field Plate ◽  
Maximum Current Density ◽  
Gan Hemt ◽  
Maximum Current ◽  
State Resistance

GaN high electronic mobility transistor (HEMT) was fabricated on silicon substrate. A breakdown voltage of 800V was obtained without using field plate technology. The fabrication processes were compatible with the conventional GaN HEMTs fabrication processes. The length between drain and gate (Lgd) has a greater impact on breakdown voltage of the device. A breakdown voltage of 800V with maximum current density of 536 mA/mm was obtained while Lgd was 15μm and the Wg was 100μm. The specific on-state resistance of this devices was 1.75 mΩ·cm2, which was 85 times lower than that of silicon MOSFET with same breakdown voltage. The results establish the foundation of low cost GaN HEMT power electronic devices.

scholarly journals Additive Manufactured Waveguide for E-Band Using Ceramic Materials

2021 ◽  
Vol 12 (1) ◽  
pp. 212
Author(s):  
Florian Hubert ◽  
Tobias Bader ◽  
Larissa Wahl ◽  
Andreas Hofmann ◽  
Konstantin Lomakin ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Attenuation Coefficient ◽  
Low Cost ◽  
Ceramic Materials ◽  
Electrical Measurements ◽  
3D Printers ◽  
3D Printed ◽  
Application Fields ◽  
Metallization Process ◽  
Waveguide Geometry

Ceramic materials are chemical- and temperature-resistant and, therefore, enable novel application fields ranging from automotive to aerospace. With this in mind, this contribution focuses on developing an additive manufacturing approach for 3D-printed waveguides made of ceramic materials. In particular, a special design approach for ceramic waveguides, which introduces non-radiating slots into the waveguides sidewalls, and a customized metallization process, are presented. The developed process allows for using conventional stereolithographic desktop-grade 3D-printers. The proposed approach has, therefore, benefits such as low-cost fabrication, moderate handling effort and independence of the concrete waveguide geometry. The performance of a manufactured ceramic WR12 waveguide is compared to a commercial waveguide and a conventionally printed counterpart. For that reason, relevant properties, such as surface roughness and waveguide geometry, are characterized. Parsing the electrical measurements, the ceramic waveguide specimen features an attenuation coefficient of 30–60 dB/m within the E-Band. The measured attenuation coefficient is 200% and 300% higher compared to the epoxy resin and the commercial waveguide and is attributed to the increased surface roughness of the ceramic substrate.

scholarly journals DBC Technology for Low Cost Power Electronic Substrate Manufacturing

2014 ◽  
Vol 69 ◽  
pp. 1180-1183 ◽  
Author(s):  
Karel Hromadka ◽  
Jiri Stulik ◽  
Jan Reboun ◽  
Ales Hamacek
Keyword(s):  
Low Cost ◽  
Power Electronic

scholarly journals The use of Silica Supported Nickel-Copper Oxide Catalyst for Photodegradation of Methylene Blue

2019 ◽  
Vol 35 (4) ◽  
pp. 1414-1419 ◽  
Author(s):  
Anti Kolonial Prodjosantoso ◽  
Farrasiya Indika Shelma ◽  
Kun Sri Budiasih ◽  
Maximus Pranjoto Utomo
Keyword(s):  
Methylene Blue ◽  
Copper Oxide ◽  
Oxide Catalyst ◽  
Low Cost ◽  
Catalyst Activity ◽  
Combination Method ◽  
Bandgap Energy ◽  
Copper Salts ◽  
Nickel Copper ◽  
Blue Methylene

Photodegradation is a save and low cost methods to clean water bodies from some organic pollutants. The method has been developed in term of increasing the efficiency of the degradation capacity of photocatalyst. The photocatalyst working under visible light is the most desirable. The preparation of silica supported nickel-copper oxide [(Ni-Cu)Ox@SiO2] catalyst and the use of the catalyst in the photodegradation of methylene blue in the water are reported. The catalyst was prepared by impregnating the silica support into the mixture of nickel and copper salts, followed by calcination at 800○C for 4 hours. A series method of XRD, SEM-EDX, and UV-Vis Diffuse Reflectance has been used to characterize the catalyst. The catalyst adsorption test was undertaken in the dark, and the catalyst activity test for photodegradation of methylene blue was conducted under the sunlight. The XRD diffractogram of as prepared (Ni-Cu)Ox@SiO2 shows a weak-wide peak at 2θ = 21.8° indicating SiO2 tridymite, and has a crystallite size of 10.38 nm. The combination method of SEM and EDX confirms the formation of (Ni-Cu)Ox@SiO2. The (Ni-Cu)Ox@SiO2 catalyst has a relatively low bandgap energy and shows a good activity for photodegradation of blue methylene under sunlight. The adsorption of the methylene blue on the (Ni-Cu)Ox@SiO2 follows the Langmuir isotherm pattern.

scholarly journals REMOVAL OF NICKEL, COPPER, AND ZINC IONS FROM AQUEOUS SOLUTION USING COFFEE BEAN HUSK (CFH)

2020 ◽  
Vol 58 (3A) ◽  
pp. 68
Author(s):  
Tran Dac Tran ◽  
Minh Le Tran
Keyword(s):  
Aqueous Solution ◽  
Low Cost ◽  
Agricultural Waste ◽  
Freundlich Isotherm ◽  
Coffee Bean ◽  
Zinc Ions ◽  
Copper And Zinc ◽  
Nickel Copper ◽  
Initial Ph ◽  
Relative Coefficient

Agricultural waste has been received much attention for its potential of being efficient and low-cost adsorbents to remove heavy metals from water. This paper presents a batch investigation of the potential of an adsorbent produced from coffee bean husk for removing copper, nickel and zinc ions from aqueous solution. At the initial pH of 5.0, a dose of 10 g/L, initial concentration of 50 mg/L, shaking speed of 100 rpm, particle size of 0.6-1 mm and at 25oC, the removal of nickel, copper, and zinc ions reached 95% and the highest adsorption capacity of coffee bean husk approached 23, 32, 22 mg/g, respectively. The adsorption isotherm of these ions preferred to the Freundlich isotherm with the relative coefficient R2 equal and or greater than 0.98. Thus, an initial conclusion drawn from the study was that coffee bean husk could potentially be as an effective and economical adsorbent for removing nickel, copper, and zinc ions from the aqueous solution.

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