Quotables
"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5973908 | Structure for thin film capacitors A capacitor is fabricated on a base surface by applying a first pattern of electrical conductors (a first capacitor plate) over the base surface with an outer surface of the first pattern of electrical conductors including molybdenum. A first hard portion... | 10/26/1999 |
| 5910892 | High power motor drive converter system and modulation control A high power motor drive converter includes a three level neutral point clamped (NPC) output power conversion stage including switches; a split series connected DC capacitor bank coupled in parallel with the NPC output power conversion stage; and a contro... | 06/08/1999 |
| 5909004 | Thermocouple array and method of fabrication A thermocouple array includes a dielectric layer having via openings therethrough, a first patterned conductive layer facing one surface of the dielectric layer, and a second patterned conductive layer facing another surface of the dielectric layer. Porti... | 06/01/1999 |
| 5907192 | Method and system for wind turbine braking Stored rotational energy in an operating variable speed wind turbine is used to pitch blades and brake the wind turbine in the event of utility power grid failure. In one embodiment, a generator IGBT converter and the main power utility grid IGBT converte... | 05/25/1999 |
| 5900674 | Interface structures for electronic devices An interface includes a surface having an electrically conductive pad; a compliant coating over the surface having a via extending to the pad; metallization patterned over the compliant coating and extending into the via; a low modulus dielectric interfac... | 05/04/1999 |
| 5897368 | Method of fabricating metallized vias with steep walls A method includes applying a first seed layer extending over a horizontal surface and via sidewalls of a dielectric material and exposed underlying contact metallization; removing at least some of the first seed layer from the contact metallization and th... | 04/27/1999 |
| 5896021 | Removal of moisture from induction motors A method for removing moisture from an induction motor having at least two phase windings with each phase winding coupled by a first respective parallel combination of a first switch and a first diode to a positive voltage line and a second respective par... | 04/20/1999 |
| 5893705 | Integrated motor and blower apparatus having two back-to-back coupled rotors A blower unit includes an elongate main mounting member, a stator, a fan subassembly, and a blower housing. The elongate main mounting member is the main structural member of the unit. The stator includes a stator core and stator windings, and the stator ... | 04/13/1999 |
| 5892643 | Gate voltage modulation for transistor fault conditions A power device control system includes a power device having an input gate and first and second output terminals, a controller, and a gate driver for supplying current to the input gate of the power device, comparing a voltage difference between the first... | 04/06/1999 |
| 5890277 | Method for manufacturing a claw pole stator structure A multipole brushless DC motor stator is formed with a pair of complementary opposable claw pole stator structures in which each of the stator structures comprises a stator base formed of a plurality of stacked sheet metal laminations. A plurality of stat... | 04/06/1999 |
| 5888884 | Electronic device pad relocation, precision placement, and packaging in arrays Top die pads are electrically relocated by forming holes through a semiconductor wafer between device active regions. An electrically insulating layer is formed over all exposed surfaces of the wafer, including within the holes, and openings are made in t... | 03/30/1999 |
| 5888837 | Chip burn-in and test structure and method A burn-in frame having at least one window and including resistors having resistor pads is situated on a flexible layer, and at least one integrated circuit chip having chip pads is situated in the at least one window. Via openings are formed in the flexi... | 03/30/1999 |
| 5886401 | Structure and fabrication method for interconnecting light emitting diodes with metallization extending through vias in a polymer film overlying the light emitting diodes A light emitting diode (LED) interconnection package includes an LED situated on a substantially transparent substrate, the LED having a contact surface with contact pads and having side surfaces; a polymer film overlying the contact surface and having vi... | 03/23/1999 |
| 5874770 | Flexible interconnect film including resistor and capacitor layers A method for fabricating a flexible interconnect film includes applying a resistor layer over one or both surfaces of a dielectric film; applying a metallization layer over the resistor layer with the resistor layer including a material facilitating adhes... | 02/23/1999 |
| 5872040 | Method for fabricating a thin film capacitor A method is provided for the manufacture of precision electronic components such as resistors, inductors, and capacitors on a polymer or ceramic surface. The electronic components can be deposited and trimmed to precise or matched values without having pr... | 02/16/1999 |
| 5864217 | Switched reluctance machine with toothed-wheel rotor sensor An apparatus and method for estimating rotor position in and commutating a switched reluctance motor (SRM), using both a flux/current SRM angle estimator and a toothed wheel generating a magnetic pickup. Commutation is based on the flux/current SRM at sta... | 01/26/1999 |
| 5859483 | Staggered cooling holes for enhanced heat transfer in air-cooled motors A method for fabricating a stack of motor laminations comprises forming cooling holes in each of the motor laminations and stacking the motor laminations with respective ones of the cooling holes in the laminations at least partially coincident to form a ... | 01/12/1999 |
| 5857858 | Demountable and repairable low pitch interconnect for stacked multichip modules Connection elements which, for example, may be used to facilitate interconnection to and stacking of electronic assemblies or may include an elongated conductive core, such as a wire or a hollow tube structure, coated with a layer of elastomeric material ... | 01/12/1999 |
| 5849623 | Method of forming thin film resistors on organic surfaces A method for fabricating a thin film resistor comprises applying a tantalum nitride layer over a dielectric layer, applying a metallization layer over the tantalum nitride layer, and patterning the metallization layer with a first portion of the metalliza... | 12/15/1998 |
| 5844810 | Scaled adaptive lithography An adaptive method of providing electrical interconnections for a plurality of feed-through lines each having a respective end extending to at least one substrate surface includes generating an artwork representation for the electrical interconnections us... | 12/01/1998 |
| 5828210 | X-ray tube anode drive speed monitor including flux pickup coil A method for monitoring a rotor speed of an X-ray tube anode drive includes acquiring axial flux pickup data from the rotor, using the axial flux pickup data to provide a flux spectrum, and estimating the rotor speed by analyzing the flux spectrum. The st... | 10/27/1998 |
| 5814859 | Self-aligned transistor device including a patterned refracting dielectric layer A semiconductor device includes a semiconductor substrate having an epitaxial layer surface opposite a drain contact surface; a semiconductor layer adjacent to the epitaxial layer surface of the substrate, the semiconductor layer including material of a f... | 09/29/1998 |
| 5809045 | Digital current differential system A method of detecting faults on a power transmission line system includes simultaneously measuring phase current samples at each phase of each transmission terminal; calculating real and imaginary phaselets comprising partial sums of the phase current sam... | 09/15/1998 |
| 5801470 | Rotors with retaining cylinders and reduced harmonic field effect losses A rotor includes a shaft; a permanent magnet layer; and a retainer comprising a conductive, low magnetic permeability material bound to the rotor shaft. The permanent magnet layer is semi-restricted between the shaft and the retainer. In one embodiment, t... | 09/01/1998 |
| 5793138 | Fabrication of induction motors A method for fabricating a motor component comprises forming a plurality of substantially parallel electrical current conductors and molding magnetic flux conductive material around at least a portion of each of the plurality of electrical current conduct... | 08/11/1998 |
| 5786708 | Self-tuning and compensating turn fault detector A method for detecting turn faults in an induction motor includes obtaining motor current and voltage waveforms and converting the motor current and voltage waveforms to digitized current and voltage waveforms. Fundamental phasors of the digitized current... | 07/28/1998 |
| 5785787 | Processing low dielectric constant materials for high speed electronics A method for fabricating a low dielectric constant printed circuit board includes dispersing an additive material in a low dielectric constant porous polymer layer; providing holes through the low dielectric constant porous polymer layer; applying a metal... | 07/28/1998 |
| 5774326 | Multilayer capacitors using amorphous hydrogenated carbon A method of fabricating a multilayer capacitor includes depositing a plurality of electrode layers on a substrate alternately with a plurality of amorphous hydrogenated carbon dielectric layers, forming at least two holes in the electrode and dielectric l... | 06/30/1998 |
| 5755819 | Photodiode array for analysis of multi-burner gas combustors A detection system includes flame sources at least two of which are independently controllable; photodetectors each having an independent view of the flame sources and being capable of producing a respective current signal in response to flames produced b... | 05/26/1998 |
| 5742522 | Adaptive, on line, statistical method and apparatus for detection of broken bars in motors by passive motor current monitoring and digital torque estimation During a learning stage a motor current signal is monitored, and estimated motor torque is used to transform the current signal into a time-frequency spectra including a plurality of segments representative of good operating modes. A representative parame... | 04/21/1998 |
| 5736448 | Fabrication method for thin film capacitors A capacitor is fabricated on a base surface by applying a first pattern of electrical conductors (a first capacitor plate) over the base surface with an outer surface of the first pattern of electrical conductors including molybdenum. A first hard portion... | 04/07/1998 |
| 5729066 | Combined radial and axial magnetic bearings In a five-axis magnetic bearing, each of two combined radial and axial magnetic bearing structures includes a radial magnetic stator and a radial magnetic rotor. A shaft supports the rotors of the bearing structures. Each rotor and stator have an asymmetr... | 03/17/1998 |
| 5726905 | Adaptive, on line, statistical method and apparatus for motor bearing fault detection by passive motor current monitoring A motor current signal is monitored during a learning stage and divided into a plurality of statistically homogeneous segments representative of good operating modes. A representative parameter and a respective boundary of each segment is estimated. The c... | 03/10/1998 |
| 5722153 | Method for fabricating a split-loop armature coil for a motor A particular coil configuration for an armature coil for a motor is disclosed, wherein a single-turn armature coil is preferably comprised of eight individual parallel conductors electrically insulated from each other and arranged to have a rectangular cr... | 03/03/1998 |
| 5721479 | Induction motor breakdown slip prediction for propulsion traction applications A method of controlling an inverter to provide protection for an AC traction motor includes starting the inverter and estimating a rotor cage resistance. A slip limit command is calculated from the estimated rotor cage resistance and used to control the i... | 02/24/1998 |
| 5705869 | Magnetic axial thrust bearings fabricated on individual stator segments An axial magnetic thrust bearing stator includes a plurality of laminated cores. Each of the cores is magnetically conductive, situated in a common plane, and symmetrically situated about a center of rotation. A plurality of electrically conductive coils ... | 01/06/1998 |
| 5703400 | Fabrication and structures of two-sided molded circuit modules with flexible interconnect layers First and second flexible interconnect structures are provided and each includes a flexible interconnect layer and a chip with a surface having chip pads attached to the flexible interconnect layer. Molding material is inserted between the flexible interc... | 12/30/1997 |
| 5699234 | Stacking of three dimensional high density interconnect modules with metal edge contacts A method for fabricating a stack of circuit modules includes providing a plurality of substrates having module interconnection layers. Each of the substrates has a circuit chip with chip pads positioned therein and an electrically conductive feed-through ... | 12/16/1997 |
| 5691626 | Active damping control for active power filter An active damping control device for an active power filter includes a filter circuit having an inductor and a capacitor for suppressing noise in the active power filter; a first current sensor for sensing a three phase capacitor current of the filter cap... | 11/25/1997 |
| 5689394 | Gate voltage modulation for transistor fault conditions A power device control system includes a power device having an input gate and first and second output terminals, a controller, and a gate driver for supplying current to the input gate of the power device, comparing a voltage difference between the first... | 11/18/1997 |
