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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...
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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...
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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...
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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...
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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,...
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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,...
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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...
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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...
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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...
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Optical terahertz frequency comb generation using nonlinear frequency mixing in quantum cascade lasers
Background Optical frequency combs (FCs) find numerous applications in time metrology, absolute distance measurements at long range, and spectroscopy. FC spectroscopy is particularly appealing in the terahertz (THz) spectral range where THz detectors based on direct power detection have low sensitivity, slow response time, and may require cryogenic...
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