A New Super Junction LDMOS with N+-Floating Layer

2006 ◽  
Author(s):  
Baoxing Duan ◽  
Bo Zhang ◽  
Zhaoji Li
Keyword(s):  
Floating Layer

scholarly journals Multifunctional molybdenum disulfide flash memory using a PEDOT:PSS floating gate

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Seongin Hong ◽  
Junwoo Park ◽  
Jung Joon Lee ◽  
Sunjong Lee ◽  
Kyungho Yun ◽  
...  
Keyword(s):  
Molybdenum Disulfide ◽  
Flash Memory ◽  
Floating Gate ◽  
Bending Test ◽  
Light Illumination ◽  
Transition Metal Dichalcogenide ◽  
Large Memory ◽  
Temperature Solution ◽  
Multilevel Memory ◽  
Floating Layer

AbstractTwo-dimensional transition metal dichalcogenide materials (TMDs), such as molybdenum disulfide (MoS2), have been considered promising candidates for future electronic applications owing to their electrical, mechanical, and optical properties. Here, we present a new concept for multifunctional MoS2 flash memory by combining a MoS2 channel with a PEDOT:PSS floating layer. The proposed MoS2 memory devices exhibit a switching ratio as high as 2.3 × 107, a large memory window (54.6 ± 7.80 V), and high endurance (>1,000 cycles). As the PEDOT:PSS film enables a low-temperature solution-coating process and mechanical flexibility, the proposed P-memory can be embedded on a polyimide substrate over a rigid silicon substrate, offering high mechanical endurance (over 1,000 cycle bending test). Furthermore, both MoS2 and PEDOT:PSS have a bandgap that is desirable in optoelectronic memory operation, where charge carriers are stored differently in the floating gate depending on light illumination. As a new application that combines photodiodes and memory functions, we demonstrate multilevel memory programming based on light intensity and color.

Carrier stored trench-gate bipolar transistor with p-floating layer

2010 ◽  
Vol 31 (2) ◽  
pp. 024004 ◽  
Author(s):  
Ma Rongyao ◽  
Li Zehong ◽  
Hong Xin ◽  
Zhang Bo
Keyword(s):  
Bipolar Transistor ◽  
Floating Layer

scholarly journals Kinetics of Anaerobic Digestion of Dairy Fat Waste with Saponification Pre-Treatment

2019 ◽  
Vol 13 (2) ◽  
pp. 112 ◽  
Author(s):  
Rifki Wahyu Kurnianto ◽  
Wiratni Budhijanto ◽  
Rochim Bakti Cahyono
Keyword(s):  
Anaerobic Digestion ◽  
Lipid Content ◽  
Alternative Energy ◽  
Organic Waste ◽  
High Lipid Content ◽  
Dairy Fat ◽  
High Lipid ◽  
Pre Treatment ◽  
Kinetics Of ◽  
Floating Layer

Anaerobic digestion has been an attractive field of research in the era of energy crisis. Biogas, which is the product of anaerobic digestion, provides alternative energy, while at the same time it also prevents pollution due to organic waste accumulation. Among various organic wastes, dairy fat waste is a potential substrate for anaerobic digestion. Fat waste has high theoretical biogas potential because of its high lipid content. However, anaerobic digestion of organic waste with high lipid content is quite challenging. The main obstacle in anaerobic digestion of fat waste is its tendency to form insoluble floating layer on top of the liquid phase. This phenomenon hinders the access of hydrolytic bacteria to the substrate. Saponification is one of the methods to increase the solubility of the floating layer and hence to improve the availability of substrate for the bacteria. Saponification changes the lipid content into soap which has both polar and non-polar functional groups and the polar side will increase the solubility of the substrate in water. This study evaluated the effect of different dosage of base added as the reactant during saponification pre-treatment on the productivity of anaerobic digestion of dairy fat waste. The kinetics of the anaerobic digestion process was analyzed by mean of mathematical model. The variations of the alkaline dosages studied for saponification pre-treatment were 0.04 mol base/g sCOD; 0.02 mol base/g sCOD; and no pre-treatment for control reactor. This study proved that saponification increased the solubility of dairy fat waste. This result was confirmed by the hydrolysis constant value (kH) of 0.00782/day for reactor with saponification, which was twenty times of magnitude higher than the kH value of 0.00032/day in the reactor without saponification. However, the exposure to high pH during the saponification pre-treatment might somewhat inhibit indigenous acidogenic bacteria in the waste which results in lower methane yield in the reactors with saponification to be compared to the control reactor. A B S T R A KPeruraian anaerobik merupakan salah satu bidang riset yang sangat menarik perhatian dalam era krisis energi. Biogas tidak hanya menyediakan energi alternatif, tetapi juga dapat mencegah pencemaran akibat limbah organik. Limbah lemak susu adalah substrat yang potensial untuk proses peruraian anaerobik karena memiliki potensi biogas teoritis yang tinggi akibat kandungan lemaknya yang tinggi. Namun, peruraian anaerobik dari limbah organik dengan kandungan lemak yang tinggi memiliki tantangan tersendiri. Hambatan utama dalam peruraian anaerobik dari limbah lemak susu adalah kecenderungan untuk membentuk lapisan padatan yang tidak larut dan mengapung di bagian atas fase cair. Fenomena ini menghambat akses bakteri hidrolisis terhadap substrat. Saponifikasi adalah salah satu cara untuk meningkatkan kelarutan lapisan padatan tersebut, sehingga meningkatkan ketersediaan substrat untuk bakteri. Saponifikasi akan mengubah kandungan lemak menjadi sabun yang memiliki gugus fungsi polar maupun non-polar. Gugus fungsi yang bersifat polar akan meningkatkan kelarutan substrat dalam air. Studi ini mengevaluasi pengaruh dari berbagai dosis larutan basa yang ditambahkan sebagai reaktan selama perlakuan awal saponifikasi terhadap peruraian anaerobik limbah lemak susu. Kinetika proses peruraian anaerobik dianalisis dengan menggunakan model matematika. Variasi dosis yang diamati pengaruhnya untuk perlakuan awal saponifikasi adalah 0,04 mol basa/g sCOD; 0,02 mol basa/g sCOD; dan nol (tanpa perlakuan awal saponifikasi). Dari penelitian ini, terbukti bahwa saponifikasi berhasil meningkatkan kelarutan limbah lemak susu dan juga ditunjukkan oleh nilai konstanta hidrolisis (kH) 0,00782/hari lebih tinggi dua puluh kali lipat dibandingkan dengan nilai kH 0,00032/hari pada reaktor tanpa saponifikasi. Akan tetapi, penelitian ini juga mengindikasikan bahwa bakteri asidogenik bawaan substrat terhambat kinerjanya oleh paparan pH yang tinggi selama perlakuan awal saponifikasi berlangsung sehingga hasil gas metan yang diperoleh lebih rendah daripada reaktor kontrol.

scholarly journals Investigation of Tank 241-AW-104 Composite Floating Layer

2018 ◽  
Author(s):  
Huei K. Meznarich ◽  
James S. Lachut ◽  
Stacey D. Bolling ◽  
Tom M. Ely ◽  
Gary A Cooke
Keyword(s):  
Floating Layer

Surface-modified quantum-dot floating layer using novel thiol with large dipole moment for improved feasibility of light-erasable organic transistor memory applications

2020 ◽  
Vol 85 ◽  
pp. 111-117 ◽  
Author(s):  
Cheulhwan Kim ◽  
Jae Young Kim ◽  
Kanghuck Lee ◽  
Sun Young Jung ◽  
Dong-Jin Yun ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Quantum Dot ◽  
Organic Transistor ◽  
Memory Applications ◽  
Surface Modified ◽  
Floating Layer

Ultra low on-resistance SBD with p-buried floating layer

2003 ◽  
Author(s):  
W. Saitoh ◽  
I. Omura ◽  
K. Tokano ◽  
T. Ogura ◽  
H. Ohashi
Keyword(s):  
Floating Layer

scholarly journals Floating layer formation, foaming, and microbial community structure change in full-scale biogas plant due to disruption of mixing and substrate overloading

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Tobias Lienen ◽  
Anne Kleyböcker ◽  
Manuel Brehmer ◽  
Matthias Kraume ◽  
Lucie Moeller ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Structure Change ◽  
Full Scale ◽  
Biogas Plant ◽  
Layer Formation ◽  
Floating Layer

scholarly journals Effect of formulation parameters on the drug release and floating properties of gastric floating two-layer tablets with acetylsalicylic acid

2011 ◽  
Vol 61 (3) ◽  
pp. 303-312 ◽  
Author(s):  
Canan Hasçiçek ◽  
Günseli Yüksel-Tilkan ◽  
Berna Türkmen ◽  
Nurten Özdemir
Keyword(s):  
Drug Release ◽  
Acetylsalicylic Acid ◽  
Drug Loading ◽  
Hydroxypropyl Methylcellulose ◽  
High Viscosity ◽  
Compression Technique ◽  
Gastric Residence Time ◽  
Low Viscosity ◽  
Formulation Parameters ◽  
Floating Layer

Effect of formulation parameters on the drug release and floating properties of gastric floating two-layer tablets with acetylsalicylic acid Floating dosage forms of acetylsalicylic acid, used for its antithrombotic effect, were developed to prolong gastric residence time and increase bioavailability. In the two-layer tablet formulation, hydroxypropyl methylcellulose (HPMC) of high viscosity and an effervescent mixture of citric acid and sodium bicarbonate formed the floating layer. The release layer contained the drug, direct tableting agent and different types of matrix-forming polymers such as HPMC of low viscosity, sodium carboxymethylcellulose and chitosan. Tablets were prepared using a direct compression technique. The effect of formulation variables on physicochemical and floating properties and the drug release from tablets were investigated. Floating ability was dependent on the amount of effervescent agent and gel-forming polymer of the floating layer. Drug release was prolonged to 8 hours by changing the type and viscosity of the matrix-forming polymer in the drug-loading layer and all formulations showed a diffusion release mechanisms.

Doping Concentration Optimization for Ultra-Low-Loss 4H-SiC Floating Junction Schottky Barrier Diode (Super-SBD)

2009 ◽  
Vol 615-617 ◽  
pp. 655-658 ◽  
Author(s):  
Chiharu Ota ◽  
Johji Nishio ◽  
Kazuto Takao ◽  
Tetsuo Hatakeyama ◽  
Takashi Shinohe ◽  
...  
Keyword(s):  
Schottky Barrier ◽  
Breakdown Voltage ◽  
Dynamic Characteristics ◽  
Figure Of Merit ◽  
Doping Concentration ◽  
Drift Region ◽  
Static Characteristics ◽  
Low Loss ◽  
Significant Lowering ◽  
Floating Layer

Previous simulation works and experiments on the loss of 4H-SiC floating junction Schottky barrier diodes (Super-SBDs) show that the loss is related to the doping concentration in the drift region and the pattern of the floating layer. The effect of the doping concentration for lowering the loss is characterized the breakdown voltage (Vbd) and the on-state resistances (RonS) of the Super-SBDs based on Baliga’s figure of Merit (BFOM). Experimental devices with two doping concentrations in the drift region are fabricated to investigate the static characteristics: Vbd and RonS. The Vbd of the Super-SBDs is close to the simulation result, near 3000 V. However the tendency of the Vbd by the doping concentration is not similar to the simulation result. And the RonS are about 3.22 mcm2 which is higher than that of simulation result. The doping concentration optimized in this study does not show significant lowering loss and the design of the floating layer in the termination region affect the low-loss static characteristics of the Super-SBD. In addition, adopting PiN structure with floating layer (Super-PiN) affects the low-loss dynamic characteristics, optimizing the doping concentration in the drift region. We conclude that the fabricated Super-SBDs with the floating layer in the termination region, the drift region with a doping concentration of 1.01016 cm-3 and mesa-shaped termination structure, have excellent Vbd of 2990 V which is almost same as that of simulation result and RonS of 3.22 mcm2.

scholarly journals The influence of the N+ floating layer on the drift doping of RESURF LDMOS and its analytical model

2016 ◽  
Vol 13 (20) ◽  
pp. 20160852-20160852
Author(s):  
Xiarong Hu ◽  
Weibo Wang ◽  
Yupin Ji ◽  
Qing Hua
Keyword(s):  
Analytical Model ◽  
Floating Layer
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