Siemens Medical Solutions Usa, Inc.

Avago Technologies International Sales Pte. Limited

Leland Stanford Junior University

Sean T Hansen

Stephen Roy Barnes

Walter T Wilser

Grazyna M Palczewska

Yongli Huang

Paul Anthony Wagner

David Martin

Arif Sanli Ergun

Lovell Harold Camnitz

Nelson H Oliver

Kun Wang

Jeesu Kim

Bernhard Ulrich Koelle

Alexia Kekoa

G Göksenin Yaralioglu

Keri Liane Williams

Lori Ann Callaghan

Burtis Khuri-Yakub

A filter device configured to directly connect to a differential power amplifier of a transmit chain circuit. The filter device may include a transformer and a filter configured as a half lattice equivalent topology and having a single-ended output. The filter may be a lattice filter configured as a full lattice topology or a lattice equivalent filter configured as a half lattice equivalent topology. The filter includes a first branch having a first impedance network of one or more first impedance elements and a second branch having a second impedance network of one or more second impedance elements. The single-ended output of the filter device may connect to an antenna switch that is in turn connected to an antenna.

Wideband filter for direct connection to differential power amplifier

In a bulk acoustic resonator device, at least one additional metal feature is formed on a top surface of the bottom electrode at a location at which the bottom electrode electrical contact will subsequently be formed, thereby thickening the metal at the location below where the piezoelectric material layer will be etched to form the opening for the bottom electrode electrical contact. Consequently, even though some of the metal of the additional metal feature and/or of the bottom electrode will be removed during the process of etching the opening in the piezoelectric material layer, the bottom electrode will always retain sufficient thickness after the piezoelectric material layer is etched.

Bulk acoustic resonator devices and processes for fabricating bulk acoustic resonator devices

A capacitive membrane ultrasound transducer is provided. Membranes or other microelectromechanical devices are provided in a 3-1 geometry, allowing application of an electric field substantially perpendicular to a range dimension. The membranes are on a plurality of different respective planes more parallel than perpendicular with each other, and the planes are more perpendicular than parallel with the faces of the elements or transducer.

3-1 mode capacitive membrane ultrasound transducer

A push-pull capacitive micromechanical ultrasound transducer (CMUT) is provided for ultrasound imaging or therapy. Gaps and electrodes on both sides of an electrostatic membrane provide push-pull operation. The membrane is oriented to flex in a direction of acoustic propagation. A surface connected to the membrane may better expose the movement to the acoustic medium even in the push-pull arrangement.

Push-pull capacitive micro-machined ultrasound transducer array

CMUT elements are formed on a substrate. Electrical conductors are formed to interconnect between different portions of the substrate. The substrate is then separated into pieces while maintaining the electrical connections across the separation. Since the conductors are flexible, the separated substrate slabs may be positioned on a curved surface while maintaining the electrical interconnection between the slabs. Large curvatures may be provided, such as associated with forming a multidimensional transducer array for use in a catheter. The electrical interconnections between the different slabs and elements may allow for a walking aperture arrangement for three dimensional imaging.

Curved capacitive membrane ultrasound transducer array

Structure for capacitive micromachined ultrasonic transducer (CMUT) device or other vibrating membrane device having non-uniform membrane so that membrane mass and stiffness characteristics may be substantially independently adjusted. CMUT having trenched membrane and/or membrane with non-uniform thickness or density. Method for operating transducer or vibrating membrane device. Array of devices at least some of which have non-uniform membrane properties. CMUT comprising substrate, support for membrane, and membrane extending over support to create cavity, membrane having non-uniform membrane thickness resulting from at least one of: thickening on upper surface of the membrane outside of cavity, thickening on lower surface of membrane inside cavity, trench on upper surface of membrane, trench on lower surface of the membrane, and any combination of two or more of these. Method for fabricating CMUT or vibrating membrane device having non-uniform membrane. High mechanical sensitivity transducer for sensor, microphone, and/or transmitter.

Capacitive micromachined ultrasonic transducer(CMUT) with varying thickness membrane

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Palo Alto, CA, United States of America

Sean T Hansen