James A. Cooper
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View article: A New Class of SiC Power MOSFETs with Record-Low Resistance
A New Class of SiC Power MOSFETs with Record-Low Resistance Open
Silicon carbide (SiC) power transistors are used in the main traction inverter of electric vehicles (EVs). Tesla began installing SiC power MOSFETs in 2017, and has now produced 4.8 million EVs containing over 169 million SiC power MOSFETs…
View article: Sources of error and methods to improve accuracy in interface state density analysis using quasi-static capacitance–voltage measurements in wide bandgap semiconductors
Sources of error and methods to improve accuracy in interface state density analysis using quasi-static capacitance–voltage measurements in wide bandgap semiconductors Open
Characterizing interface trap states in commercial wide bandgap devices using frequency-based measurements requires unconventionally high probing frequencies to account for both fast and slow traps associated with wide bandgap materials. T…
View article: A Fully Self-Aligned SiC Trench MOSFET with 0.5 μm Channel Pitch
A Fully Self-Aligned SiC Trench MOSFET with 0.5 μm Channel Pitch Open
SiC power MOSFETs have made great progress since the first commercial devices were introduced in 2011, but they are still far from their theoretical limits of performance. At blocking voltages above 1200 V the specific on-resistance is lim…
View article: Electronic logic to enhance switch reliability in detecting openings and closures of redundant switches
Electronic logic to enhance switch reliability in detecting openings and closures of redundant switches Open
A logic circuit is used to enhance redundant switch reliability. Two or more switches are monitored for logical high or low output. The output for the logic circuit produces a redundant and failsafe representation of the switch outputs. Wh…
View article: One-way transformation of information
One-way transformation of information Open
Method and apparatus are provided for one-way transformation of data according to multiplication and/or exponentiation modulo a prime number. An implementation of the invention permits the one way residue transformation, useful in encrypti…
View article: (Invited) Vertical Gallium Nitride Mosfets for Electric Drivetrains
(Invited) Vertical Gallium Nitride Mosfets for Electric Drivetrains Open
Wide-bandgap semiconductors have a significant advantage over conventional Si-based electronics by leveraging materials properties to achieve higher breakdown voltage, lower on-resistance, and high-frequency operation. For electric vehicle…