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公开(公告)号：US20220108975A1
公开(公告)日：2022-04-07
申请号：US17492356
申请日：2021-10-01
发明人： Cristina MANOLA , Rosa Lucia TORRISI , Simone RASCUNÀ , Gabriele BELLOCCHI , Annalinda CONTINO , Giuseppe MACCARRONE
IPC分类号： H01L23/00 , H01L23/495 , B22F9/24 , B22F1/00
摘要： The disclosure is directed to wide band-gap semiconductor devices, such as power devices based on silicon carbide or gallium nitride materials. A power device die is attached to a carrier substrate or a base using sintered silver as a die attachment material or layer. The carrier substrate is, in some embodiments, copper plated with silver. The sintered silver die attachment layer is formed by sintering silver nanoparticle paste under a very low temperature, for example, lower than 200° C. and in some embodiments at about 150° C., and with no external pressures applied in the sintering process. The silver nanoparticle is synthesized through a chemical reduction process in an organic solvent. After the reduction process has completed, the organic solvent is removed through evaporation with a flux of inert gas being injected into the solution.
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公开(公告)号：US20230137346A1
公开(公告)日：2023-05-04
申请号：US17514832
申请日：2021-10-29
发明人： Enrico POLI , Vincenzo MARANO
IPC分类号： H02P7/29
摘要： A method and apparatus for adaptive rectification for preventing current inversion in motor windings are provided. In the method and apparatus, first and second half bridges of a plurality of half bridges are operated to synchronously rectify and permit passage of current, through the windings of the motor, in a first direction. A change of direction of the current from the first direction to a second direction opposite the first direction is detected. In response to detecting that the current changed direction to the second direction, the first and second half bridges of the plurality of half bridges are operated to quasi-synchronously rectify and block passage of the current through the windings in the second direction.
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公开(公告)号：US20230135941A1
公开(公告)日：2023-05-04
申请号：US18048370
申请日：2022-10-20
发明人： Gabriele GATTERE , Manuel RIANI , Carlo VALZASINA
IPC分类号： G01C19/5712 , B81B3/00
摘要： The present disclosure is directed to a MEMS gyroscope formed by a substrate and a movable mass suspended on the substrate and configured to carry out a movement in a driving direction and in a detection direction perpendicular to each other. The movable mass has a first face and a second face opposite to the first face. The gyroscope also has a first and a second quadrature compensation electrode group, fixed to the substrate and capacitively coupled to the movable mass. The first quadrature compensation electrode group faces the first face of the movable mass, and the second quadrature compensation electrode group faces the second face of the movable mass. The first and the second quadrature compensation electrode groups each have a respective variable facing area on the movable mass as a result of the movement of the movable mass in the driving direction and are configured to exert an electrostatic force on the movable mass during the movement of the movable mass in the driving direction.
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公开(公告)号：US20230134850A1
公开(公告)日：2023-05-04
申请号：US18045784
申请日：2022-10-11
摘要： A semiconductor power device has a maximum nominal voltage and includes: a first conduction terminal and a second conduction terminal; a semiconductor body, containing silicon carbide and having a first conductivity type; body wells having a second conductivity type, housed in the semiconductor body and separated from one another by a body distance; source regions housed in the body wells; and floating pockets having the second conductivity type, formed in the semiconductor body at a distance from the body wells between a first face and a second face of the semiconductor body. The floating pockets are shaped and arranged relative to the body wells so that a maximum intensity of electrical field around the floating pockets is greater than a maximum intensity of electrical field around the body wells at least for values of a conduction voltage between the first conduction terminal and the second conduction terminal greater than a threshold voltage, the threshold voltage being less than the maximum nominal voltage.
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公开(公告)号：US20230133912A1
公开(公告)日：2023-05-04
申请号：US17515212
申请日：2021-10-29
申请人： STMICROELECTRONICS APPLICATION GMBH , STMicroelectronics S.r.l. , STMicroelectronics International N.V.
IPC分类号： G01R31/317 , G01R31/319 , G01R31/28
摘要： A trace-data preparation circuit including a filtering circuit to receive traced memory-write data and a First In First Out buffer coupled with the filtering circuit to receive selected memory-write data filtered by the filtering circuit. The trace-data preparation circuit further including a data compression circuit to provide packaging data to a packaging circuit that groups the selected memory-write data.
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公开(公告)号：US20230129720A1
公开(公告)日：2023-04-27
申请号：US17966344
申请日：2022-10-14
摘要： PMUT acoustic transducer formed in a body of semiconductor material having a face and accommodating a plurality of first buried cavities, having an annular shape, arranged concentrically with each other and extending at a distance from the face of the body. The first buried cavities delimit from below a plurality of first membranes formed by the body so that each first membrane extends between a respective first buried cavity of the plurality of first buried cavities and the face of the body. A plurality of piezoelectric elements extend on the face of the body, each piezoelectric element extending above a respective first membrane of the plurality of first membranes. The first membranes have different widths, variable between a minimum value and a maximum value.
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公开(公告)号：US20230127446A1
公开(公告)日：2023-04-27
申请号：US17963534
申请日：2022-10-11
发明人： Stefano RAMORINI
摘要： A power switch current sensing circuit includes matching first and second transistors having sources connected to first and second terminals, respectively, of the power switch. A current mirror has a first node coupled to a drain of the first transistor and a second node coupled to a drain of the second transistor. The current mirror sinks a current from the first node equal to a current flowing through the second transistor. A biasing circuit provides a same biasing voltage to the control terminals of the first and second transistors. An output resistance is coupled between the first node and a reference voltage node. A difference between a current flowing through the first transistor and the current sunk by the current mirror circuit from the first node flows through the output resistance. An output voltage produced at the first node is indicative of the current flowing through the power switch.
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公开(公告)号：US11632029B2
公开(公告)日：2023-04-18
申请号：US16802741
申请日：2020-02-27
发明人： Roberto La Rosa , Salvatore Baglio , Carlo Trigona
摘要： An energy harvester includes an elongated tubular casing extending around a longitudinal axis between opposed first and second ends. A body is arranged in the casing. A helical electrical winding is wound around the longitudinal axis. The body is arranged to move along the longitudinal axis with alternate motion away from the first end towards the second end and away from the second end towards the first end. As a result of this alternate motion, an electromotive force is produced in the at least one helical electrical winding. Furthermore, at least one of the first and second ends includes a piezoelectric transducer that is configured to co-operate in a kinetic energy transfer relationship with the at least one body to generate an electric voltage as a result of the at least one body reaching, in the alternate motion, an end-of-travel position towards the piezoelectric transducer.
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公开(公告)号：US11631376B1
公开(公告)日：2023-04-18
申请号：US17574803
申请日：2022-01-13
摘要： A non-emissive display includes a backlight controller sending a pulse during each sub-frame of a plurality of frames to row and column drivers that drive backlight zones. The row drivers count each pulse to keep a pulse count total, and reset the pulse count total when it is equal to a first number indicating how many row drivers are present. Each row driver activates its channels and waits for a next pulse if the pulse count total is not equal to the first number and if the pulse count total is equal to a second number indicating in which sub-frame that first driver is to be activated. Each row driver waits for a next pulse if the pulse count total is not equal to the first number and the second number. Each column driver activates its channel in response to receipt of each pulse.
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公开(公告)号：US20230112999A1
公开(公告)日：2023-04-13
申请号：US18064829
申请日：2022-12-12
IPC分类号： B41J2/03
摘要： A microfluidic device for continuous ejection of fluids includes: a semiconductor body that laterally delimits chambers; an intermediate structure which forms membranes each delimiting a top of a corresponding chamber; and a nozzle body which overlies the intermediate structure. The device includes, for each chamber: a corresponding piezoelectric actuator; a supply channel which traverses the intermediate structure and communicates with the chamber; and a nozzle which traverses the nozzle body and communicates with the supply channel. Each actuator is configured to operate i) in a resting condition such that the pressure of a fluid within the corresponding chamber causes the fluid to pass through the supply channel and become ejected from the nozzle as a continuous stream, and ii) in an active condition, where it causes a deformation of the corresponding membrane and a consequent variation of the pressure of the fluid, causing a temporary interruption of the continuous stream.
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