Patents Represented by Attorney Eugene A. Parsons

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  • Spacers for a flat panel display and method
    Patent number: 5717287
    Abstract: A method for affixing a plurality of spacers (150, 250) within a field emission display (100, 200) is disclosed. The method includes the steps of: (i) forming a metallic bonding pad (160, 260) on the inner surface of the anode (110) or cathode (230) (ii) placing an edge of the spacers (150, 250) in intimate physical contact with a portion of the metallic bonding pad (160, 260) thereby providing contacting surfaces (iii) applying a potential difference of about 1000 Volts across the contacting surfaces so that the metallic bonding pad (160, 260) is biased positively with respect to the spacers (150, 250), and (iv) simultaneously heating the region about, and including, the bonding surfaces to a temperature of about 400 degrees Celsius for about 15 minutes so that an anodic bond is formed between the contacting surfaces.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: February 10, 1998
    Assignee: Motorola
    Inventors: Craig Amrine, Kenneth Dean
  • Lateral MOSFET with modified field plates and damage areas
    Patent number: 5710455
    Abstract: A FET including a channel region and a drift region in a channel layer with a source in the channel region and a drain in the drift region. The current channel between the source and drain defining a straight transistor portion and a curved transistor portion. An oxide with a thin portion overlying the channel region and a thick portion overlying the drift region, and a gate on the thin oxide overlying the current channel. A drain field plate and a gate field plate on the thick oxide with spaced apart edges and a damaged region underlying the edges of the field plates only in the curved transistor portion to reduce electric fields at the edges of the field plates. Also, the current channel has a greater length and the edges are spaced apart farther in the curved transistor portions.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: January 20, 1998
    Assignee: Motorola
    Inventors: Mohit Bhatnagar, Charles E. Weitzel, Michael Zunino
  • Microcavity LED with photon recycling
    Patent number: 5710441
    Abstract: A microcavity LED with photon recycling including a substrate having at least one layer of material positioned thereon, and a first cladding layer, a second cladding layer and an active region sandwiched therebetween forming a mesa on the layer of material. The mesa has generally vertical sides and an upper surface with an electrically conductive and light reflective system positioned on the vertical sides of the mesa and partially covering the upper surface to form a first electrical contact for the LED, the electrically conductive and light reflective system defining a centrally located light emitting opening on the surface of the mesa, the mesa having a diametric dimension of the surface greater than one time larger than a diametric dimension of the opening.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: January 20, 1998
    Assignee: Motorola, Inc.
    Inventors: Donald E. Ackley, Chan-Long Shieh, Michael S. Lebby
  • Masking methods during semiconductor device fabrication
    Patent number: 5709744
    Abstract: A method of masking surfaces during fabrication of semiconductor devices is disclosed, which includes providing a gallium arsenide substrate. The surface can include a layer of native oxide or not, and a metal mask is positioned adjacent the surface so as to define a growth area and an unmasked portion on the surface. Ultraviolet light is directed at the unmasked area, by exposing the surface to a bright light, so as to grow an oxide film on the unmasked portion of the surface. The metal mask is removed and the oxide film then serves as a mask for further operations and can be easily removed in situ by heating. If native oxide is included, it can be removed in situ by heating the substrate to a lower temperature.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: January 20, 1998
    Assignee: Motorola
    Inventor: Shiralagi Kumar
  • Integrated electro-optical package and method of fabrication
    Patent number: 5708280
    Abstract: An integrated electro-optical package including a dual sided opto-electronic device, composed of a substrate with an array of light emitting devices (LEDs) formed on a first major surface thereof, and at least one vertical cavity surface emitting laser formed on an opposed second major surface of the substrate. A mounting structure formed so as to allow for the mounting of the dual sided opto-electronic device on the interior major surfaces, and further having electrical conductors for cooperating with the LEDs and VCSEL of the opto-electronic device. A driver substrate having electrical connections for interfacing with the mounting structure and the dual sided opto-electronic device. A plurality of driver circuits connected to the mounting structure and dual sided opto-electronic device through connection pads formed on the driver substrate.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: January 13, 1998
    Assignee: Motorola
    Inventors: Michael S. Lebby, Wenbin Jiang, Karen E. Jachimowicz
  • Display spacer structure for a field emission device
    Patent number: 5708325
    Abstract: A method is provided for fabricating a display spacer assembly (100, 400, 500) useful in the fabrication of large-area field emission displays (200, 600). The method includes the steps of: forming slots (12, 22, 32, 33) in a substrate (10, 23, 30) thereby providing a jig; providing spacers (14, 24, 34) having lower rounded edges and upper edges; placing the lower rounded edges into the slots (12, 22, 32, 33) so that the spacers (14, 24, 34) are positioned in a predetermined layout pattern over the slotted jig surface; and placing the upper edges of the spacers (14, 24, 34) in abutting engagement with a display plate (18, 10) of a field emission display.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: January 13, 1998
    Assignee: Motorola
    Inventors: Clifford L. Anderson, Craig Amrine, Jeffery A. Whalin
  • Dual voltage controlled oscillator using integrated transistor and negative differential resistance diode
    Patent number: 5708398
    Abstract: A dual voltage controlled oscillator including a transistor with a negative differential resistance diode coupled to a first terminal and an inductance coupled to a second terminal. Operating voltages are applied to the gate and drain of the transistor to set the oscillator to operating in a negative differential resistance region of the diode. The diode, the inductance and the operating voltages are connected so that varying either of the operating voltages varies the frequency of the oscillations at the output.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: January 13, 1998
    Assignee: Motorola
    Inventors: Jun Shen, Vijay K. Nair
  • VCSEL with distributed Bragg reflectors for visible light
    Patent number: 5706306
    Abstract: An article and method for making a vertical cavity surface emitting laser (101) is provided. The vertical cavity surface emitting laser includes a semiconductor substrate (102) having a first surface (105) on which a first set of distributed Bragg reflectors (103) are deposited. The distributed Bragg reflectors (103) are made of alternating layers of indium aluminum gallium phosphide and aluminum arsenide. An active region (106) is disposed on the distributed Bragg reflectors with a subsequent of and active region (106) and another cladding region (107). Another distributed Bragg reflector (103) is deposited on cladding region (107).
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: January 6, 1998
    Assignee: Motorola
    Inventors: Wenbin Jiang, Jamal Ramdani, Michael S. Lebby
  • Feedforward adaptive threshold processing method
    Patent number: 5703504
    Abstract: A signal processing circuit (10) generates a bias signal (27) that is used for biasing a comparator (26). An input signal (14) is compared to the bias signal (27) in order to reconstruct the input signal (14) on an output of the comparator. The bias signal (27) is generated by selecting the larger of a percent of the input signal (23) or an offset signal (24) that is larger than a minimum value of the input signal.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: December 30, 1997
    Assignee: Motorola
    Inventors: Christopher K. Y. Chun, Stephen G. Shook, Carl R. Ryan
  • Electronic game system
    Patent number: 5702305
    Abstract: An interactive electronic game system (10) composed of at least one control unit (12) for receiving, monitoring, compiling and transmitting game data and information and several personal display units (14) for controlling game play and displaying game data and information. The personal display units (14) and the control unit (12) being in constant omni-directional communication. The personal display units (14) of the system having an aperture (100) formed therein, and capable of receiving and displaying game data and information in a direct view image and/or a virtual image.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: December 30, 1997
    Assignee: Motorola
    Inventors: Michael P. Norman, Karen E. Jachimowicz
  • Method for detecting information stored in a MRAM cell having two magnetic layers in different thicknesses
    Patent number: 5703805
    Abstract: A method for detecting and storing four states contained in a MRAM cell having two layers (11,13) which have different thicknesses is provided. A first magnetic field is applied to the MRAM cell, which causes a magnetoresistive change in the MRAM cell. A first and second states are detected based on the magnetoresistive change. A second magnetic field is further applied to the MRAM cell. A third and fourth states are detected based on the magnetoresistive change due to the second magnetic field.
    Type: Grant
    Filed: May 8, 1996
    Date of Patent: December 30, 1997
    Assignee: Motorola
    Inventors: Saied N. Tehrani, Eugene Chen, Mark Durlam, Xiaodong T. Zhu
  • Integrated electro-optical package
    Patent number: 5703394
    Abstract: An integrated electro-optical package including a plurality of organic light emitting devices (LEDs) directly interconnected to external driver circuits utilizing a printed circuit board, having formed therein a plurality of plated through-hole vias and a method of fabricating the integrated electro-optical package. The organic LEDs are fabricated on a supporting substrate and include vertical interconnections to driver and control circuits mounted on an uppermost surface of a printed circuit board (PCB). The vertical interconnections are formed utilizing plated through-hole conductive vias formed in the printed circuit board, conductive leads, and conductive epoxy. A hermetic seal is formed by positioning a sealing ring formed on the printed circuit board in sealing contact with a sealing area on the surface of the substrate so as to hermetically seal the organic light emitting devices.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: December 30, 1997
    Assignee: Motorola
    Inventors: Chengping Wei, Song Q. Shi, Hsing-Chung Lee
  • Integrated electro-optic package for reflective spatial light modulators
    Patent number: 5703664
    Abstract: An array of reflective LCSLM pixels formed on a substrate with a light polarizing layer positioned between the array and a light source. An overmolded housing defining an optical waveguide having a light input, a light output, and a mirrored surface directing light from the input toward the output, the polarizing layer being mounted to allow light passing into the optical waveguide to pass therethrough. The light source provided to direct light through the polarizing layer and evenly illuminate the array. Light reflected from the array is directed onto the mirrored surface of the optical waveguide. A diffuser at the output forms an image plane for the reflected light. Electrical connections are made from the array to a circuit board on which it is mounted. All components are encapsulated by the overmolded housing, having leads formed in the housing to provide external contacts.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: December 30, 1997
    Assignee: Motorola, Inc.
    Inventors: Karen E. Jachimowicz, George R. Kelly, Michael S. Lebby
  • Method of mode detection and control in semiconductor lasers
    Patent number: 5703892
    Abstract: A method of controlling the spatial mode of the output of a semiconductor laser including the steps of monitoring above threshold spontaneous emissions of a semiconductor laser. Identifying a point at which the rate-of-change, or the slope, of spontaneous emissions versus drive current abruptly changes. Employing feedback to maintain spatial mode control.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: December 30, 1997
    Assignee: Motorola, Inc.
    Inventors: Paul Claisse, Philip Kiely
  • Ferromagnetic GMR material
    Patent number: 5702831
    Abstract: A multi-layer magnetic material (10) has magnetic vectors (21,22) that point along a length (27) of the material (10). Opposing magnetic fields cause the vectors to snap past the perpendicular position with a rapid change in the resistance of the material. The material is used as a memory cell (37,38,39,41) of a memory (36).
    Type: Grant
    Filed: November 6, 1995
    Date of Patent: December 30, 1997
    Assignee: Motorola
    Inventors: Eugene Chen, Saied N. Tehrani
  • Signal processing method
    Patent number: 5703506
    Abstract: A signal processing circuit (10) performs a sample and hold (16) of an input signal (14) and stores a maximum value of the input signal (18). A guardband signal (21) is developed that is less than the maximum value that is stored. The input signal is compared to the guardband signal to determine if the input signal is above or below the guardband signal. A threshold signal (25) is developed by taking a percentage of the maximum value that is stored. The input signal is compared to the threshold signal to regenerate the input waveform. If the input signal is below the guardband signal and above the threshold signal, the sample and hold circuit is reset to acquire a new maximum value of the input signal so that a new threshold can be used for regenerating the input signal.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: December 30, 1997
    Assignee: Motorola
    Inventors: Stephen G. Shook, Christopher K. Y. Chun, Daniel B. Schwartz
  • Method of fabricating buried control elements in semiconductor devices
    Patent number: 5700703
    Abstract: A method of fabricating buried control elements in a semiconductor device by providing a substrate and forming an epitaxial layer on the substrate. A native oxide is formed on the surface, and a mask is then positioned adjacent the surface so as to define a growth area and an unmasked portion. A bright light is selectively directed to grow an oxide film on the unmasked portion of the surface. After forming the oxide film, the native oxide on the growth area is desorbed and a buried control element layer is grown on the epitaxial layer. Subsequently, the oxide film is desorbed and the epitaxial layer is regrown, thereby burying the buried control element layer.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: December 23, 1997
    Assignee: Motorola
    Inventors: Jenn-Hwa Huang, Christine Thero, Kumar Shiralagi
  • Field emission device current control apparatus and method
    Patent number: 5698933
    Abstract: A field emission device (10) utilizes a resistive layer (13) between an extraction grid (14) and a conductive layer (12) to form a resistor (23). The resistor controls the amount of current flowing through an emission tip (16) of the field emission device (10).
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: December 16, 1997
    Assignee: Motorola, Inc.
    Inventor: Robert T. Smith
  • Integrated electro-optical package with carrier ring and method of fabrication
    Patent number: 5699073
    Abstract: An integrated electro-optical package (40) including an optically transparent substrate (10) with an array (15) of light emitting devices (LEDs) (12) formed thereon, cooperating to generate a complete image, thereby forming a LED display chip (14). The LEDs (12) are positioned in rows and columns and having electrical connections adjacent outer edges of the substrate (10). A driver board (30), having embedded electrical conductors (34), plated through-hole vias (44) and/or embedded leadframes (45) for cooperating with the LEDs (12) of the LED display chip (14) and further having a plurality of driver and control circuits (42) connected to the driver board (30) and LEDs (12). A molded carrier ring (50), electrically interfaced with the driver board (30), the LED display chip (14) and the driver and control circuits (42).
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: December 16, 1997
    Assignee: Motorola
    Inventors: Michael S. Lebby, Fred V. Richard, John W. Stafford
  • Optical correction layer for a light emitting apparatus
    Patent number: 5698941
    Abstract: An optical correction layer for a light emitting apparatus having gaps in brightness at the light-emitting surface. The optical correction layer includes a plurality of optical correction regions centered over the gaps, and a plurality of optically transparent regions which overlay the remainder of the light-emitting surface. The optical correction regions include appropriately formed grooves which collect and redirect light adjacent the gap. The light is redirected to cover and effectively conceal the gap. The optically transparent regions permit light to travel through, without redirection.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: December 16, 1997
    Assignee: Motorola
    Inventors: James E. Jaskie, Lawrence N. Dworsky, Karen E. Jachimowicz, Fred V. Richard, Kathleen Tobin