Purdue Research Foundation

Sandia Corporation

Sean Michael Scott

Dimitrios Peroulis

Christopher Nordquist

Daniel John Valentino

P Alexander Walerow

Roy H Olsson

Darren W Branch

Christopher T Rodenbeck

Andrew Kovacs

Kenneth Wojciechowski

Paul Gilbert Clem

Douglas Edward Adams

Darin Leonhardt

Farshid Sadeghi

Mark Raymond Salasky

David Joseph Koester

Jeff Hunker

Steven L Wolfley

Joyce Olsen Custer

Tyler Scott Jordan

A method and apparatus is disclosed for differentially altering the radiation response across multiple MOSCAP sensors by placing different thin gate materials with different atomic numbers on a series of MOS-based radiation sensors. The secondary electrons created in high-atomic weight materials (such as gold) at lower incident photon energy levels enable a tissue equivalent radiation response and radiations source identification/differentiation. This is a desirable alternative to using filters with different coefficients across a series of MOSCAP radiation sensor which will attenuate the signal and degrade the device form factor. The method and apparatus disclosed achieves the same functionality but with inherent gain instead of attenuation, thus increasing sensitivity. This will improve the minimum resolvable dose for x-rays and low-energy gammas (high-energy gammas will remain the same), and produces a response that can distinguish the energy level of incident radiation photon.

Variable metal multi-gate metal oxide semiconductor capacitor radiation sensor for improved gain and tissue equivalence

A low-power wireless ionizing radiation measurement system is provided that is intended to be used in a wearable dosimeter for occupational radiation monitoring.

Low-noise surface level MOS capacitor for improved sensor quality factor

An apparatus is disclosed comprising a metal oxide semiconductor capacitor (MOSCAP) comprising one or more gate layers disposed over a contiguous radiation-sensitive insulating layer, wherein the contiguous radiation-sensitive insulating layer comprises one or more contacting dielectric layers. A method may be employed to measure a value of a radiation-induced capacitance response of a metal oxide semiconductor capacitor (MOSCAP) from multiple non-contacting gate layers disposed over a radiation-sensitive layer comprising of one or more contacting dielectric layers to thereby enhance a sensitivity and a resolution of a radiation response of the MOSCAP.

Combined n-type and p-type MOS-based radiation sensors for environmental compensations

The present invention related to self-limiting filters, arrays of such filters, and methods thereof. In particular embodiments, the filters include a metal transition film (e.g., a VOfilm) capable of undergoing a phase transition that modifies the film's resistivity. Arrays of such filters could allow for band-selective interferer rejection, while permitting transmission of non-interferer signals.

Self-limiting filters for band-selective interferer rejection or cognitive receiver protection

An acoustically coupled frequency selective radio frequency (RF) device is provided. The device includes a piezoelectric substrate overlain by a plurality of electrodes. The device further includes a pair of RF input terminals at least one of which is electrically connected to at least one of the electrodes, and a pair of output RF terminals, at least one of which is electrically connected to at least one other of the electrodes. At least one of the electrodes is electromechanically reconfigurable between a state in which it is closer to a face of the piezoelectric substrate and at least one state in which it is farther from the face of the piezoelectric substrate.

Programmable electroacoustic filter apparatus and method for its manufacture

A micro-electromechanical system-type (MEMS) sensor arrangement for wirelessly measuring temperatures is disclosed. The MEMS sensor arrangement includes a multimorph sensor, a sensor coil coupled to the multimorph sensor, and a readout coil configured to be magnetically coupled to the sensor coil to i) energize the sensor coil, and ii) provide a readout of the natural frequency of the multimorph sensor, the sensor coil and the readout coil.

Highly-reliable micro-electromechanical system temperature sensor

Growing community of inventors

West Lafayette, IN, United States of America

Sean Michael Scott