Crystallization of Silicon Microstructures Through Rapid Self-Heating for High-Performance Electronics on Arbitrary Substrates

2012 ◽  
Vol 4 (10) ◽  
pp. 970-976
Author(s):  
Helena Silva ◽  
Gokhan Bakan ◽  
Adam Cywar ◽  
Nicholas Williams ◽  
Faruk Dirisaglik ◽  
...  
Keyword(s):  
High Performance ◽  
Self Heating ◽  
Silicon Microstructures

Mechanical Reliability of Silicon Microstructures

2021 ◽  
Author(s):  
Toshiyuki Tsuchiya
Keyword(s):  
High Performance ◽  
Measurement Data ◽  
Design Guidelines ◽  
Fatigue Properties ◽  
Mechanical Reliability ◽  
Effective Parameters ◽  
Micro Electro Mechanical Systems ◽  
Device Reliability ◽  
Silicon Microstructures ◽  
Silicon Based

Abstract In this article, an overview of the mechanical reliability of silicon microstructures for micro-electro-mechanical systems (MEMS) is given to clarify what we now know and what we still have to know about silicon as a high-performance mechanical material on the microscale. Focusing on the strength and fatigue properties of silicon, attempts to understand the reliability of silicon and to predict the device reliability of silicon-based microstructures are introduced. The effective parameters on the strength and the mechanism of fatigue failure are discussed with examples of measurement data to show the design guidelines for highly reliable silicon microstructures and devices.

Influence of Loading Frequency on Thermal and Micro-Mechanical Damage During Fatigue of Flax Fiber Reinforced Composites

2020 ◽  
Author(s):  
Md. Zahirul Islam ◽  
Chad A. Ulven
Keyword(s):  
High Performance ◽  
Thermal Damage ◽  
Natural Fiber ◽  
Mechanical Damage ◽  
Flax Fiber ◽  
Fiber Reinforced Composites ◽  
Loading Frequency ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Self Heating

Abstract Like synthetic fiber reinforced composites, natural fiber reinforced composites possess a good potential to be used in high performance applications due to their good balance of mechanical and damping properties. Composite materials used in sporting goods equipment and automotive applications are subjected to repeating, regular loads. Therefore a clear understanding about the reliability of composite materials under fatigue/cyclic loading is important for their design in high performance applications. Currently, the fatigue performance of natural fiber reinforced composites are not well understood or characterized. The fatigue damage of flax fiber reinforced polymer matrix composites can be divided into two components: thermal damage due to self-heating in the sample and micro-mechanical damage due to damage creation (i.e. crack initiation, crack propagation, delamination, etc.). In this study, fatigue tests were conducted at four different loading frequencies and the two energy components defined were separated experimentally. The fatigue life of flax fiber reinforced composites was found to decrease with increasing loading frequency. Thermal damage due to the high self-heating temperature of the sample was found to be the main responsible form of energy which decreases fatigue life with increasing loading frequency. Micro-mechanical damage due to cyclic loading was not found to change significantly with increasing loading frequency.

scholarly journals A new approach to both high safety and high performance of lithium-ion batteries

2020 ◽  
Vol 6 (9) ◽  
pp. eaay7633 ◽  
Author(s):  
Shanhai Ge ◽  
Yongjun Leng ◽  
Teng Liu ◽  
Ryan S. Longchamps ◽  
Xiao-Guang Yang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Elevated Temperature ◽  
High Power ◽  
High Performance ◽  
Lithium Ion ◽  
New Approach ◽  
Self Heating ◽  
On Demand ◽  
Li Ion ◽  
Novel Concept

We present a novel concept to achieve high performance and high safety simultaneously by passivating a Li-ion cell and then self-heating before use. By adding a small amount of triallyl phosphate in conventional electrolytes, we show that resistances of the passivated cells can increase by ~5×, thereby ensuring high safety and thermal stability. High power before battery operation is delivered by self-heating to an elevated temperature such as 60°C within tens of seconds. The present approach of building a resistive cell with highly stable materials and then delivering high power on demand through rapid thermal stimulation leads to a revolutionary route to high safety when batteries are not in use and high battery performance upon operation.

scholarly journals Low Temperature Characterization and Modeling of FDSOI Transistors for Cryo CMOS Applications

2021 ◽  
Author(s):  
Mikaël Cassé ◽  
Gérard Ghibaudo
Keyword(s):  
Low Temperature ◽  
High Performance ◽  
High Energy Physics ◽  
Electrical Characterization ◽  
Cmos Technology ◽  
High Energy ◽  
Design Tools ◽  
Self Heating ◽  
Wide Range ◽  
Performance Computing

The wide range of cryogenic applications, such as spatial, high performance computing or high-energy physics, has boosted the investigation of CMOS technology performance down to cryogenic temperatures. In particular, the readout electronics of quantum computers operating at low temperature requires larger bandwidth than spatial applications, so that advanced CMOS node has to be considered. FDSOI technology appears as a valuable solution for co-integration between qubits and consistent engineering of control and read-out. However, there is still lack of reports on literature concerning advanced CMOS nodes behavior at deep cryogenic operation, from devices electrostatics to mismatch and self-heating, all requested for the development of robust design tools. For these reasons, this chapter presents a review of electrical characterization and modeling results recently obtained on ultra-thin film FDSOI MOSFETs down to 4.2 K.

scholarly journals In situ healing of dendrites in a potassium metal battery

2020 ◽  
Vol 117 (11) ◽  
pp. 5588-5594 ◽  
Author(s):  
Prateek Hundekar ◽  
Swastik Basu ◽  
Xiulin Fan ◽  
Lu Li ◽  
Anthony Yoshimura ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Current Density ◽  
High Performance ◽  
Low Cost ◽  
Metal Anode ◽  
Self Heating ◽  
Oxide Cathode ◽  
Order Of Magnitude ◽  
Li Ion

The use of potassium (K) metal anodes could result in high-performance K-ion batteries that offer a sustainable and low-cost alternative to lithium (Li)-ion technology. However, formation of dendrites on such K-metal surfaces is inevitable, which prevents their utilization. Here, we report that K dendrites can be healed in situ in a K-metal battery. The healing is triggered by current-controlled, self-heating at the electrolyte/dendrite interface, which causes migration of surface atoms away from the dendrite tips, thereby smoothening the dendritic surface. We discover that this process is strikingly more efficient for K as compared to Li metal. We show that the reason for this is the far greater mobility of surface atoms in K relative to Li metal, which enables dendrite healing to take place at an order-of-magnitude lower current density. We demonstrate that the K-metal anode can be coupled with a potassium cobalt oxide cathode to achieve dendrite healing in a practical full-cell device.

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