143 results about "Thinned array" patented technology

A process for fabricating an integrated circuit package includes establishing a plating mask on a first surface of a metal carrier. The plating mask defines a plurality of components including a die attach pad, at least one row of contact pads and at least one additional electronic component. A plurality of metallic layers are deposited on exposed portions of the first surface of the metal carrier. The plating mask is stripped from the metal carrier, leaving the plurality of metallic layers in the form of the plurality of components. A semiconductor die is mounted to die attach pad and pads of the semiconductor die are electrically connected to ones of the contact pads and to the additional electronic component. The first surface of the metal carrier is overmolded to encapsulate the plurality of components and the semiconductor die and the metal carrier is etched away.

A process for fabricating an integrated circuit package. Metal is plated up on a substrate to provide a plurality of contact pads and a plurality of fiducial markings on a periphery of the contacts. A transparent mask is selectively deposited on the substrate, over the fiducial markings. A semiconductor die is mounted on the substrate such that the contact pads circumscribe the semiconductor die and the semiconductor die is wire bonded to ones of the contact pads. The wire bonds are encapsulated and the semiconductor die and contact pads are covered in a molding material. The substrate is selectively etched to thereby etch away the substrate underneath the contact pads and the semiconductor die. The integrated circuit package is singulated from other integrated circuit packages by sawing using the fiducial markings.

A prior application discloses a novel probe geometry that offers a wide field of view in an ultrasonic imaging device. That geometry is referred to as a "thinned array" of transducer elements. The application discloses an improved probe geometry permitting high-resolution imaging of a large volume of the subject's body. In this improved geometry, the array elements are non-uniform in size and spacing. The probe is intended for use, for example, in a method of determining parameters of blood flow, such as vector velocity, blood flow volume, and Doppler spectral distribution, using sonic energy (ultrasound) and a novel thinned array. Also in a method of tracking blood flow and generating a three dimensional image of blood vessel of interest that has much greater resolution than images produced using heretofore known ultrasound devices and methods.

Provided herein is a method for use in medical applications that permits (1) affordable three-dimensional imaging of blood flow using a low-profile easily-attached transducer pad, (2) real-time blood-flow vector velocity, and (3) long-term unattended Doppler-ultrasound monitoring in spite of motion of the patient or pad. The pad and associated processor collects and Doppler processes ultrasound blood velocity data in a three dimensional region through the use of a planar phased array of piezoelectric elements. The invention locks onto and tracks the points in three-dimensional space that produce the locally maximum blood velocity signals. The integrated coordinates of points acquired by the accurate tracking process is used to form a three-dimensional map of blood vessels and provide a display that can be used to select multiple points of interest for expanded data collection and for long term continuous and unattended blood flow monitoring. The three dimensional map allows for the calculation of vector velocity from measured radial Doppler.A thinned array (greater than half-wavelength element spacing of the transducer array) is used to make a device of the present invention inexpensive and allow the pad to have a low profile (fewer connecting cables for a given spatial resolution). The full aperture is used for transmit and receive so that there is no loss of sensitivity (signal-to-noise ratio) or dynamic range. Utilizing more elements (extending the physical array) without increasing the number of active elements increases the angular field of view. A further increase is obtained by utilizing a convex non-planar surface.

The invention provides a millimeter wave sparse imaging method and system based on a sparse array. The method comprises the steps of enabling original electromagnetic field data collected by the sparse array to be changed into first electromagnetic field data of a dense array according to a first equivalent principle, and enabling the first equivalent principle to comprise an equivalent change ofkeeping a sparse frequency point unchanged, changing the original electromagnetic field data into second electromagnetic field data on densely distributed frequency points according to a second equivalence principle, wherein the second equivalence principle comprises changes based on the densely distributed array under different frequency points, and imaging by adopting a millimeter wave holographic imaging algorithm according to the first electromagnetic field data and the second electromagnetic field data. The imaging definition of the long-distance millimeter wave imaging system can be improved.

A method for obtaining an angle-Doppler signature for a target using sparse arrays in multiple-input-multiple-output (MIMO) radar, the MIMO radar including a transmit antenna array, the transmit antenna array being at least one-dimensional (e.g. 2-D, 3-D or 4-D) and having a plurality of antenna elements. The method includes generating transmit signals for transmission by the transmit antenna array, the transmit signals defining at least a first transmit trajectory (e.g. circular) of a phase center within the transmit antenna array, and transmitting the transmit signals using Amplitude Modulation on the transmit antenna array. The method further includes receiving receive signals from the target, the receive signals resulting from the incidence of the transmit signals upon the target, and determining the angle-Doppler signature from the receive signals. The first transmit trajectory is such that, in operation, the phase center undergoes non-linear motion within the transmit antenna array.