Search Results - physical+sciences+%3e+semiconductor

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Rapid optical metrology of critical dimensions of large-area nanostructure arrays with complex patterns
Background Scatterometry-based metrology has the capability to perform high-throughput inspection of geometric characteristics of large-area nanopatterned surfaces. It utilizes physics-based dependencies between reflectance of light scattered from nanopatterned surfaces for pre-defined set of wavelengths and Critical Dimensions (CDs) of such nanopatterns. Current...
Published: 8/16/2024   |   Inventor(s): Dragan Djurdjanovic, Ramin Sabbagh
Keywords(s):  
Category(s): Physical sciences > Semiconductor, Physical sciences > Testing equipment, Computer > Algorithms and software methods, Computer > AI/ML
Reducing amount of helper data in silicon physical unclonable functions (PUFs) via lossy compression
Background Silicon physical unclonable functions (PUFs) are widely used in emerging hardware security applications, such as device identification, authentication, and cryptographic key generation. PUFs generate unique randomness by exploiting inherent random process variation during fabrication. Among them, static random-access memory (SRAM) PUFs that...
Published: 12/8/2023   |   Inventor(s): Michael Orshansky, Ye Wang
Keywords(s):  
Category(s): Physical sciences > Semiconductor
Software for signal segmentation and extraction of informative time-domain features
Background Industrial manufacturing equipment equipped with large numbers of sensors is commonplace in today’s modern manufacturing systems. From Smart Factories using AI and digital twins, along with the proliferation of the Internet of Things (IoT) to improve efficiency and productivity, one common challenge is what to do with the vast amounts...
Published: 3/18/2024   |   Inventor(s): Dragan Djurdjanovic, Roberto Dailey
Keywords(s):  
Category(s): Physical sciences > Semiconductor, Software
Plasma-free anisotropic wet etching method for III-N micro LEDs
Background MicroLED technology are the next big display technology delivering stunning picture quality with spectacularly high resolution and brightness. MicroLED brings all the great aspects of OLED technology—self-emissive, perfect blacks, outstanding color, perfect off-angle viewing—while ditching the organic compounds to produce exceedingly...
Published: 12/8/2023   |   Inventor(s): Xiuling Li, Clarence Chan
Keywords(s):  
Category(s): Physical sciences > Semiconductor
Wafer alignment with AFM metrology
Background One of the major challenges in nanoscale manufacturing is defect control. Optical inspection is not an option at the nanoscale level due to the diffraction limit of light, and without inspection high scrap rates can occur. One solution to this problem is inline metrology using atomic force microscopes (AFM). Single chip MEMS based AFMs have...
Published: 7/11/2024   |   Inventor(s): Michael Cullinan, Tsung-Fu Yao, Andrew Duenner
Keywords(s):  
Category(s): Physical sciences > Semiconductor, Physical sciences > Testing equipment
Bidirectional DC/AC topologies
BackgroundRecently, more and more power conversion applications, such as PV micro-inverters, battery storage systems, on-board EV chargers, etc., require isolated DC/AC power converters. The markets for these applications are rapidly growing. The conventional two-stage topology solutions have simple control, higher efficiency, and lower cost. However,...
Published: 12/8/2023   |   Inventor(s): Alex Huang, Qingyun Huang
Keywords(s):  
Category(s): Physical sciences > Semiconductor
Fabrication of metal-insulator-semiconductor photoelectrodes
Background Photoelectrochemical (PEC) water splitting is a promising technology for converting solar energy into clean and storable chemical energy. In PEC cells, semiconductors play a key role in absorbing photons from the light source to create mobile charge carriers. Various semiconductor materials have been studied for the high-performance PEC cells,...
Published: 12/11/2023   |   Inventor(s): Edward Yu, Soonil Lee, Li Ji
Keywords(s):  
Category(s): Physical sciences > Semiconductor, Physical sciences > Green tech
Monolithic, unetched BTO strip waveguides
Background Electro-optic technology relies on the operation of systems/devices through the propagation and interaction of light with various tailored/optically active materials. Typical electro-optical devices are designed to modulate the properties of a light wave (e.g., phase, polarization, amplitude, frequency, direction of propagation) and include...
Published: 7/12/2024   |   Inventor(s): Alexander Demkov, John Ortmann, Jr., Agham-Bayan Posadas
Keywords(s):  
Category(s): Physical sciences > Semiconductor, Physical sciences > Materials
Analog-to-digital converter (ADC) technologies
Background Dr. Nan Sun and his research group have developed a portfolio of analog to digital converter (ADC) technologies that are available for licensing. Overall, Dr. Sun’s lab develops high-performance analog/mixed-signal circuits and architectures, with research efforts focusing primarily on designing low-power, high-speed, and high-resolution...
Published: 11/1/2023   |   Inventor(s): Nan Sun, Wenjuan Guo, Long Chen, Xiyuan Tang, Linxiao Shen, Chen-Kai Hsu
Keywords(s):  
Category(s): Physical sciences > Computer hardware, Physical sciences > Semiconductor
Low-power SAR ADC design
Background A successive approximation analog-to-digital converter (ADC) is used to digitize the physical analog signals to logic digital signals. It often requires low noise to achieve high accuracy. Traditionally the low noise is realized by utilizing a large comparator or averaging. Those methods are not desirable, since a large comparator is power-hungry...
Published: 12/8/2023   |   Inventor(s): Nan Sun, Long Chen, Xiyuan Tang
Keywords(s):  
Category(s): Physical sciences > Semiconductor
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