Patents Assigned to Rockwell Scientific Licensing, LLC
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Patent number: 6807227Abstract: The invention monitors a communication channel and estimates its characteristics from time to time, thus providing a dynamic estimate of channel characteristics. Based on the channel characteristics, a control processor calculates a preferred configuration of digital (and optionally, analog) signal processing to best manage the available energy for the present channel characteristics. The selected configuration is then down-loaded into communication modules stored in extra memory during runtime.Type: GrantFiled: October 25, 2001Date of Patent: October 19, 2004Assignee: Rockwell Scientific Licensing, LLCInventor: Charles Chien
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Patent number: 6800531Abstract: A thin InGaAs contact layer is provided for the collector of a heterojunction bipolar transistor (HBT) above an InP sub-collector. The contact layer provides a low resistance contact mechanism and a high thermal conductivity path for removing device heat though the sub-collector, and also serves as an etch stop to protect the sub-collector during device fabrication. A portion of the sub-collector lateral to the remainder of the HBT is rendered electrically insulative, preferably by an ion implant, to provide electrical isolation for the device and improve its planarity by avoiding etching through the sub-collector.Type: GrantFiled: January 27, 2003Date of Patent: October 5, 2004Assignee: Rockwell Scientific Licensing, LLCInventors: Richard L. Pierson, Jr., James Chingwei Li, Berinder P. S. Brar, John A. Higgins
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Patent number: 6798090Abstract: An electrical generator has a plurality of spaced magnets that move together relative to at least one coil to generate an electrical signal in the coils. Equal numbers of magnets and coils, with equal lengths and spacings between them, are preferably employed. Significant enhancements in power output are achieved by orienting successive magnets in magnetic opposition to each other, so that the magnetic fields from successive magnets along the axis of movement substantially cancel each other at locations between the magnets.Type: GrantFiled: April 18, 2002Date of Patent: September 28, 2004Assignee: Rockwell Scientific Licensing, LLCInventors: Jeffrey T. Cheung, Hao Xin
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Patent number: 6797995Abstract: A thin InGaAs contact layer is provided for the collector of a heterojunction bipolar transistor (HBT) above an InP sub-collector. The contact layer provides a low resistance contact mechanism and a high thermal conductivity path for removing device heat though the sub-collector, and also serves as an etch stop to protect the sub-collector during device fabrication. A portion of the sub-collector lateral to the remainder of the HBT is rendered electrically insulative, preferably by an ion implant, to provide electrical isolation for the device and improve its planarity by avoiding etching through the sub-collector.Type: GrantFiled: February 14, 2002Date of Patent: September 28, 2004Assignee: Rockwell Scientific Licensing, LLCInventors: Richard L. Pierson, Jr., James Chingwei Li, Berinder P. S. Brar, John A. Higgins
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Patent number: 6798556Abstract: The present invention is a reversible electrodeposition optical modulation device employing a segmented counter electrode that permits localized areas of a continuous optical modulation electrode to be switched independently of each other. Such devices can be configured to enable practically seamless switching over the entire device for smart window and adjustable mirror applications, or to minimize cross-talk and pixel overlap for display applications. Since the electrical contacts and switching circuitry are located on the counter electrode, more active area is available for optical modulation.Type: GrantFiled: January 31, 2003Date of Patent: September 28, 2004Assignee: Rockwell Scientific Licensing, LLC.Inventors: D. Morgan Tench, Ichiro Sugioka
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Patent number: 6771081Abstract: Micro-electromechanical (MEM) devices having their fixed and movable members immersed in a liquid medium. Movement is effected by applying a stimulus which creates a force that causes the movable member to move with respect to the fixed member. The movable and fixed members are immersed in a liquid medium having desired characteristics. The liquid is preferably selected to have a viscosity which critically damps the motion of the movable member. The liquid may also be chosen to provide a dielectric constant greater than one, which, where applicable, increases the electrostatic force created for a given drive voltage, and the device's capacitance sensing range, over what they would be in air. The liquid medium might also be used to improve the device's thermal dissipation characteristics, or to provide improved isolation between structures.Type: GrantFiled: August 22, 2002Date of Patent: August 3, 2004Assignee: Rockwell Scientific Licensing, LLCInventors: Robert L. Borwick, III, Philip A. Stupar, Jeffrey F. DeNatale
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Patent number: 6768230Abstract: A dynamic magnet system, particularly useful for electrical generation, employs multiple magnets in polar opposition to each other and having a critical angle of displacement from a horizontal static position of less than 1 degree, to induce an electrical signal in one or more surrounding coils. The magnets interact with each other to yield multiple modes of oscillation and a greater range of response to applied inputs than is achievable with a single magnet system. A lubricant for the magnets is preferably a ferrofluid that establishes a static coefficient of friction between the magnets and their support structure less than about 0.02, with a viscosity less than 10 centipoise. The magnets can be oriented for movement in a primarily horizontal direction and are adaptable to numerous different kinds of support structures, including ring-shaped.Type: GrantFiled: February 19, 2002Date of Patent: July 27, 2004Assignee: Rockwell Scientific Licensing, LLCInventors: Jeffrey T. Cheung, Hao Xin
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Patent number: 6762661Abstract: A shutter switch is disclosed the is placed in the path of a millimeter beam and is either opaque or transparent to the beam. The shutter switch comprises a number of waveguides placed adjacent to one another to intercept the beam, a portion of the beam passing through each waveguide. The dimensions of each waveguide are such that transmission of the respective portion of the beam would be cut-off if the all of the waveguide walls were conductive. However, the waveguides have high impedance structures on at least two of their opposing interior walls that allow the beam at the design frequency to be transmitted through the waveguide with uniform density and minimal attenuation. At this design frequency the shutter switch to be essentially transparent to the beam. The high impedance structures can also be changed to a conductive surfaces such that all of the waveguides walls appear conductive and the waveguide takes on the characteristics of a metal rectangular waveguide.Type: GrantFiled: September 29, 2000Date of Patent: July 13, 2004Assignee: Rockwell Scientific Licensing, LLCInventor: John A. Higgins
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Patent number: 6761986Abstract: A doped Cadmium Oxide (CdO) film has been developed for use in applications requiring conductive, films which are highly transparent to IR radiation. Suitable dopants for the film include any of the Group III elements, namely Boron, Aluminum, Gallium, Indium, or Thallium.Type: GrantFiled: March 29, 2002Date of Patent: July 13, 2004Assignee: Rockwell Scientific Licensing, LLCInventor: Jeffrey T. Cheung
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Publication number: 20040130422Abstract: A mechanical translator includes at least one magnet that is disposed on a substrate to carry a load and has a magnetic axis generally transverse to the substrate, establishing a magnetic field with maximum external density adjacent the substrate. An ultra low friction interface is obtained with ferrofluid bearings, such as a light mineral oil medium mixed with isoparaffinic acid, which establish a critical angle of displacement from a horizontal static position of less than 1 degree, and preferably less than 10 minutes. A controller of magnetic material can be placed on the opposite side of the substrate to control the movement of the magnets.Type: ApplicationFiled: December 19, 2003Publication date: July 8, 2004Applicant: Rockwell Scientific Licensing, LLCInventor: Jeffrey T. Cheung
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Patent number: 6759641Abstract: A photodetector array includes a plurality of photodetectors, preferably photodiodes, coupled to a respective plurality of addressable interface circuits. At each pixel, a switching circuit configures neighboring ones of the photodetectors into pixels by summing multiple photodetector signals into an aggregated pixel output signal. The switching circuit is electronically switchable to aggregate said photodetector signals according to at least two different selectable pixellization schemes with differing resolution.Type: GrantFiled: September 27, 2000Date of Patent: July 6, 2004Assignee: Rockwell Scientific Licensing, LLCInventor: Markus Loose
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Patent number: 6709564Abstract: The acid copper sulfate solutions used for electroplating copper circuitry in trenches and vias in IC dielectric material in the Damascene process are replaced with a type of plating system based on the use of highly complexing anions (e.g., pyrophosphate, cyanide, sulfamate, etc.) to provide an inherently high overvoltage that effectively suppresses runaway copper deposition. Such systems, requiring only one easily-controlled organic additive species to provide outstanding leveling, are more efficacous for bottom-up filling of Damascene trenches and vias than acid copper sulfate baths, which require a minimum of two organic additive species. The highly complexed baths produce fine-grained copper deposits that are typically much harder than large-grained acid sulfate copper deposits, and which exhibit stable mechanical properties that do not change with time, thereby minimizing “dishing” and giving more consistent CMP results.Type: GrantFiled: September 30, 1999Date of Patent: March 23, 2004Assignee: Rockwell Scientific Licensing, LLCInventors: D. Morgan Tench, John T. White, Dieter Dornisch, Maureen Brongo
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Patent number: 6710831Abstract: A Liquid Crystal Display (LCD) uses a tunable mirror in place of a partially reflective mirror. The tunable mirror has a controllable reflectivity and transmitance which allows the mirror to primarily reflect light when the LCD is operated in a reflective mode, and to primarily transmit light from a backlight when the LCD is operated in a transmissive mode.Type: GrantFiled: September 29, 2000Date of Patent: March 23, 2004Assignee: Rockwell Scientific Licensing, LLCInventors: Bruce Winker, William J. Gunning