Thermally And Electrically Conductive Patents (Class 361/712)
  • Patent number: 6424531
    Abstract: Heat sinks are provided that achieve very high convective heat transfer surface per unit volume. These heat sinks comprise a spreader plate, at least three fins arranged radially around the spreader plate and an array of porous reticulated foam blocks that fills the space between adjacent fins.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: July 23, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Mohinder Singh Bhatti, Shrikant M. Joshi, Russell S. Johnson
  • Patent number: 6396698
    Abstract: A module retention adapter for attaching enabled heat sinks to the user target system while validating a processor with an LAI tool. In a preferred embodiment, the invention comprises an adapter and a clip. A user attaches an adapter to each retention module on a target system. Once a processor is loaded into the LAI tool and a heat sink solution is loaded onto the processor between the adapters. The heat sink clips are then clipped onto the adapters. The clips retain the heat sink to the adapters while also retaining the heat sink to the motherboard retention modules.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: May 28, 2002
    Assignee: Agilent Technologies, Inc.
    Inventor: Brent A. Holcombe
  • Patent number: 6396699
    Abstract: An apparatus for mounting a heat sink to a chip package such as a BGA type chip package or the like is disclosed. In an exemplary embodiment, ground bumps are formed on the die substrate of the chip package and on the heat mating surface of the heat sink to be attached to the package. The ground bumps formed on the die protrude into the body of dimples formed in the body of the chip encapsulation package to make thermal/electrical ground contact with the ground bumps formed on the heat mating surface of the heat sink for electrically grounding the heat sink.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: May 28, 2002
    Assignee: LSI Logic Corporation
    Inventors: Barry Caldwell, Craig C. McCombs
  • Patent number: 6358595
    Abstract: The object of the invention is to produce a surface layer that can prevent from uncomfortable sensation upon manual handling of component such as metal chassis used in electronic devices. The surface is coated with a special paint material or a resinous coating material that include insulating material or foamed structure. For example, gaseous entrapments are incorporated in the layer by pre-mixing a foaming material in the paint, followed by foaming the layer at a high temperature. A decline in the restoring strength of the foaming material is supplemented by the top coating with the bead-containing paint.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: March 19, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takashi Kobayashi
  • Patent number: 6355332
    Abstract: A portable electrical apparatus includes an electrical device generating heat in operation; a metal case conducting the heat generated by the electrical device, having an external surface, and containing the electrical device; and a film on the external surface including a granulated insulating material providing thermal insulation from the electrical device.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: March 12, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takashi Kobayashi
  • Patent number: 6351385
    Abstract: An integrated circuit heat dissipator is comprised of a unitary piece of metallic material for dissipating thermal energy generated by semiconductor devices encapsulated in a DIP integrated circuit package. The heat dissipator is adapted to accept heat conducting pins of the integrated circuit. Soldering secures the heat dissipator and the integrated circuit heat conducting pins to each other and to the printed circuit board. A bulk mass of heat conducting solder is retained at the connection of the heat dissipator and the heat conducting pins for enhancing the heat sinking of the pins by the heat dissipator.
    Type: Grant
    Filed: September 26, 2000
    Date of Patent: February 26, 2002
    Assignee: Thomson Licensing, S.A.
    Inventor: Raymond McKay Featherstone, III
  • Patent number: 6303209
    Abstract: An electrical apparatus includes an electrical device generating heat in operation; a metal case conducting the heat generated by the electrical device, having an external surface, and containing the electrical device; and a film on the external surface including a foamed layer providing thermal insulation from the electrical device.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: October 16, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takashi Kobayashi
  • Patent number: 6285554
    Abstract: A method and an arrangement for connecting a component, such as a chip (6), on a substrate (7) to a conductive surface of a carrier. The conductive surface can be an earth plane (10) and the carrier can be a printed circuit board. The method and arrangement allow the component to thermally conduct and/or electrically conduct onto the conductive surface.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: September 4, 2001
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: David Westberg
  • Patent number: 6275380
    Abstract: A heat sink structure includes first and second add-on heat sinks mounted to a primary heat sink. The add-on heat sinks are thermally connected to the primary heat sink such that the effective heat transfer surface area for dissipating heat to the ambient environment is increased compared to the surface area of the primary heat sink alone. Increasing the effective heat transfer surface area enhances heat transfer from the primary heat sink. The add-on heat sinks also restrict air from flowing between the primary heat sink and a cabinet of the computer system. In this manner, the add-on heat sinks force air to flow between the fins of the primary heat sink, thus further enhancing heat transfer from the primary heat sink.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: August 14, 2001
    Assignee: Sun Microsystems, Inc.
    Inventor: Vernon P. Bollesen
  • Patent number: 6265840
    Abstract: An electronic device for a motor vehicle, having an electronics unit designed for switching high currents in a two-part housing, a capacitor unit being arranged in the housing to suppress the interference signals produced by said high currents. In an electronic device which is easy to manufacture and in which the heat produced by the electronic circuits has no further effect on the operation of the electronic circuit, the capacitor unit, which is designed to have a large surface area, is thermally connected to a first housing part (1), and the electronics unit (8, 9) is thermally connected to a second housing part (2).
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: July 24, 2001
    Assignee: Mannesmann VDO AG
    Inventors: Hans-Werner Wiezorek, Barbara Wolf
  • Patent number: 6259603
    Abstract: An electronic control unit, in particular for motor vehicles, having at least one electronic circuit arranged on at least one p.c. board and at least one additional circuit designed as a hybrid circuit which is attached to the at least one circuit arranged on the at least one p.c. board with an electrically conductive connection. A heat-conducting carrier element, which has mounting surfaces for attaching the at least one p.c. board and the at least one hybrid, is provided.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: July 10, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Rupert Fackler, Thomas Laux
  • Patent number: 6242797
    Abstract: A semiconductor device having a pellet mounted on a radiating plate thereof is disclosed. The radiating plate is formed in such a shape that a central portion thereof is positioned higher than both end portions thereof. A pellet is mounted on a lower face of the central portion of the radiating plate, and an upper face of the central portion of the radiating plate is exposed to the top of a resin member. Since the upper face of the central portion of the radiating plate which has the pellet mounted on the lower face thereof is exposed from the resin member, heat generated by the pellet can be radiated efficiently.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: June 5, 2001
    Assignee: NEC Corporation
    Inventors: Seiji Ichikawa, Takeshi Umemoto, Toshiaki Nishibe, Kazunari Sato, Kunihiko Tsubota, Masato Suga, Yoshikazu Nishimura, Keita Okahira, Tatsuya Miya, Toru Kitakoga, Kazuhiro Tahara
  • Patent number: 6201696
    Abstract: A package for a semiconductor power device which comprises: a conductive bottom plate as a heat sink; an insulating substrate mounted on the bottom plate; a copper film formed on the insulating substrate to expose a peripheral region of the insulating substrate; semiconductor chips disposed on the copper film; a container arranged on the bottom plate, surrounding the insulating substrate; an external terminal supported through the container and connected electrically with the semiconductor chips; and a silicone gel filled within the container, wherein a solidified insulating material is disposed on an outer edge region of the copper film and the peripheral region of the insulating substrate. Thus, reducing an electric field across the interface and making it difficult to cause a creeping discharge. A notch is formed in the bottom plate, and the notch is filled with a high heat conductive resin. The notch is located outwardly apart from a region where the semiconductor chips are mounted.
    Type: Grant
    Filed: December 8, 1998
    Date of Patent: March 13, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshio Shimizu, Hiroyuki Hiramoto, Hiroki Sekiya, Kenji Kigima
  • Patent number: 6188579
    Abstract: A printed wiring board assembly includes a pallet that is coupled to the bottom surface of a printed wiring board. An insert is provided having a first portion that is slidably mounted to the pallet and a second portion that is bonded to the bottom surface of the printed wiring board so that the insert is movable, relative to the pallet, in a plane parallel to the PWB. In one embodiment, the pallet includes an opening having a first portion and a second portion that is larger than the first portion, and the first and second portions of the insert fit at least partially in the respective first and second portions of the pallet opening. In another embodiment, the insert has a thickness that is equal to or greater than the thickness of the pallet.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: February 13, 2001
    Assignee: Lucent Technologies Inc.
    Inventors: Charles Joseph Buondelmonte, Walter J. Picot
  • Patent number: 6163456
    Abstract: In a hybrid module which is mounted on a mother circuit board with a first surface of a substrate opposed to the mother circuit board, a cavity is formed on the first surface, and a heat-generating circuit component is facedown-bonded in the cavity. Heat generated in the circuit component is radiated to the mother circuit board through a heat radiation plate.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: December 19, 2000
    Assignee: Taiyo Yuden, Co., Ltd.
    Inventors: Kazutaka Suzuki, Naoto Narita, Tohru Watanabe, Yoshiaki Kamiyama, Kazuki Yagi
  • Patent number: 6163455
    Abstract: An apparatus is disclosed for attaching a thermal solution to a mini-cartridge. The apparatus comprises: a bracket adapted to be snapped into position around the mini-cartridge; two or more threads formed in the bracket, the threads positioned such that when the bracket is snapped into position around the mini-cartridge the threads are located on the side of the mini-cartridge opposite from the side adjacent to the thermal solution; and screws adapted to run through holes in the mini-cartridge to engage with the threads and to fixedly attach the thermal solution to the mini-cartridge.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: December 19, 2000
    Assignee: Intel Corporation
    Inventor: Gregory A. James
  • Patent number: 6154364
    Abstract: A process and circuit board assembly by which a single soldering operation produces a multicomponent stack capable of dissipating heat from a power IC chip (12) mounted to a substrate (10). The circuit board assembly generally includes a number of conductors (16) on the substrate (10), with the conductors (16) being spaced apart and substantially parallel to each other. A heat spreader (14) is soldered to at least some of the conductors (16), and the chip (12) is soldered to the heat spreader (14). With this structure, heat is conducted from the chip (12) through the heat spreader (14) and conductors (16) to the substrate (10). To maintain proper orientation of the components (12, 14, 16) relative to each other during a single soldering operation, the components (12, 14, 16) are equipped with complementary features.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: November 28, 2000
    Assignee: Delco Electronics Corp.
    Inventors: Troy M. Girrens, Robert Gordon Fessenden, Dianne K. Ruch, Thomas P. Douglas, Timothy J. Guse, Billy R. Colwell, Sidney T. Faulkner
  • Patent number: 6125037
    Abstract: A heat sink assembly includes a heat sink having torque bars, the torque bars including lips and guides extending from the lips. A package is located between the heat sink and a circuit board. A heat sink retainer includes riser arms and ends connected to the riser arms, where the ends press against the lips. The riser arms press the guides towards the package and press apertures of the heat sink away from the package. In this manner, the retainer imparts torque on the heat sink which causes the heat sink to impart a downward force on the package. This downward force creates the thermal contact between the heat sink and the package.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: September 26, 2000
    Assignee: Sun Microsystems, Inc.
    Inventor: Vernon P. Bollesen
  • Patent number: 6112527
    Abstract: An apparatus for delivering current to a cooled electrical device. The apparatus includes at least one electrical line having a first end at a first temperature and a second end at a second temperature being lower than the first temperature. The second end is provided for connection to the cooled electrical device to deliver current to the cooled electrical device. The cooled electrical device is preferable a superconducting device. At least a portion of the electrical line includes a part of a cold head. The part of the cold head is preferably a regenerator or a pulse tube of a pulse tube cooler.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: September 5, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventors: Florian Steinmeyer, Hans-Peter Kramer
  • Patent number: 6101100
    Abstract: An improved multi-electronic device package for accommodating multiple electronic devices such as integrated circuits, memory chips, or the like, is disclosed. The package includes a thermally and electrically conductive plane positioned between a first substrate and a second substrate. A first electronic device is secured to a first surface of the plane within an opening in the first substrate, and a second electronic device is secured to an opposed second surface of the plane within an opening in the second substrate. The electronic device package includes solder balls attached to the second substrate for electrically coupling and physically attaching the electronic device package to a third circuitized substrate, and solder balls attached to the first substrate for electrically coupling and physically attaching the electronic device package to a second electronic device package in a stacked configuration.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: August 8, 2000
    Assignee: International Business Machines Corporation
    Inventor: Joseph Michael Londa
  • Patent number: 6094350
    Abstract: A manufacturing module for an RF feed-forward amplifier subsystem that allows for simple and cost-effective assembly, yet provides separate compartments for the different stages of the subsystem, with low RF leakage between the compartments is disclosed. The manufacturing module comprises a printed circuit board having one or more circuit trace layers, and ground planes covering a substantial portion of the top and bottom surfaces. The printed circuited board also has numerous plated-through holes electrically connecting the top and bottom ground planes. The circuit board is sandwiched between a heatsink having a flat upper surface and a machined enclosure having an outer wall and inner divider walls. The plated-through holes, space less than 1/10 wavelength of module's highest carrier frequency apart, serve to electrically connect the heatsink to the machined enclosure, thus creating separate compartments with low RF leakage.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: July 25, 2000
    Assignee: AML Communications, Inc.
    Inventor: Benone Achiriloaie
  • Patent number: 6091604
    Abstract: Power module for a current converter, particularly a frequency converter, having at least one printed circuit board equipped at least with power components and having a heat-conducting connection with a wall of the current converter housing serving as heat sink, the power module having electrically conducting connection parts arranged vertically to the housing wall, which parts laterally confine a chamber and are long enough to enable accommodation of large, passive electrical components, such as capacitors, in the chamber. To ensure a space saving embodiment of the power module, though maintaining a sufficient heat dissipation and simplifying the electrical connection between the power module and the remaining components of the converter, it is provided that the only electrical connection between the power module and other electrical components of the converter as well as to the supply mains and to a load supplied via the converter is established via the connection parts.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: July 18, 2000
    Assignee: Danfoss A/S
    Inventors: Helge S.o slashed.e Plougsgaard, Klaus Olesen
  • Patent number: 6067231
    Abstract: A heat-dissipating structure for an electrical device comprises a PC board with a dissipating opening, and an electrical device. The PC board has an upper surface thereof and a lower surface thereof located opposite to the upper surface. The electrical device has a plurality of leads thereof extruding from a bottom surface thereof for anchoring the electrical device on the upper surface of the PC board with a substantial spacing in between. The dissipating opening is located under the electrical device for providing an air convection space to dissipate the heat generated by the electrical device. Also, dissipating plates can be installed above or under the PC board for enhancing the heat-dissipating efficiency.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: May 23, 2000
    Assignee: Acer Peripherals, Inc.
    Inventor: Jih-Yung Lu
  • Patent number: 6064575
    Abstract: A dual-board host or main printed wiring structure of a circuit module with increased component mounting area is made plug-compatible with a VME or VME64X backplane to which single-board host or main boards may be attached with connectors of differing dimensions and pin configurations, the center line of which are offset from each other. The connection sides of the two boards are respectively bonded to a heat sink frame structure having a thickness which corresponds to the connector offset on the backplane such that the total thickness of one of the printed wiring boards, the heat sink frame and the two bonding layers with respect to board to connector center line distances equals the connector offset at the backplane.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: May 16, 2000
    Assignee: Lockheed Martin Corporation
    Inventors: Eugene J. Urda, Jeffrey T. Butler, Christopher J. Kane
  • Patent number: 6031727
    Abstract: According to the present invention, functional heat conducting planar layers within a printed circuit board (PCB) are corrugated to allow for enhanced heat dissipation. According to a preferred embodiment, at least one of the power and ground planes is at least partially corrugated to extract heat from the PCB. By corrugating heat conducting structures within the PCB, additional heat dissipating surface area is provided for the PCB without the need to provide any additional heat dissipating structure.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: February 29, 2000
    Assignee: Micron Technology, Inc.
    Inventors: Kevin G. Duesman, L. Jan Bissey
  • Patent number: 6018459
    Abstract: A heat sink is disclosed having an elongate, porous metal structure, including multiple sets of thermally conductive members. The members, which are interwoven, direct heat away from a heat producing component. The elongate structure of the matrix structure can be formed in a variety of predetermined forms, including a coiled structure or an elliptically coiled structure. Alternatively, the matrix structure is plated for added thermal conductivity between the sets of members. In addition, air flow is directed over the heat sink for added convection of heat. The heat sink is fabricated using a mesh of thermally conductive material such as copper or aluminum and can be provided with a plurality of protuberances. The heat sink is thermally bonded to the heat producing component. Alternatively, the heat sink has a ledge for sealing with a duct.A method for cooling a heat producing component is also disclosed.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: January 25, 2000
    Assignee: Cray Research, Inc.
    Inventors: Douglas M. Carlson, Edward A. Malosh
  • Patent number: 6014313
    Abstract: A three-dimensional multi-chip module is formed as a stack of two-dimensional multi-chip modules comprising substrates which have electrically signal paths connecting integrated circuit chips and has vertical interconnections of the signal paths, provided by interconnection or via chips. The individual chips or other inner components on a substrate are in mechanical contact with a surface of an adjacent substrate and constitute the distance device maintaining the substrates spaced from each other. Thus heat developed in components can be conducted essentially perpendicularly to the substrates. Thermally conducting chips can be used for improving the conducting of heat. Cooling devices are located only at the top and bottom surfaces of the stack.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: January 11, 2000
    Assignee: Telefonaktiebolgey LM Ericsson
    Inventor: Hjalmar Hesselbom
  • Patent number: 6008532
    Abstract: A leadframe having individual bond fingers incorporating two or more alternate bonding areas. In one embodiment, conventional bond fingers having bonding areas in an outer row are augmented to include an additional conductive trace or intermediate portion terminating in a bonding area that is in general alignment with an inner row of bonding areas. Likewise, bond fingers having bonding areas in an inner row are enlarged to include an alternate bonding area that is in general alignment with the outer row of bonding areas. In another embodiment, bond fingers are arranged to provide multiple rows of closely-spaced staggered bonding areas to reduce bonding pitches. By providing alternate bonding areas in individual bond fingers, the manufacturing rules addressing staggered bond wire placement can be followed more readily, while simultaneously permitting the most convenient bond fingers to be utilized.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: December 28, 1999
    Assignee: LSI Logic Corporation
    Inventor: Karla Y. Carichner
  • Patent number: 5991154
    Abstract: A heat sink having a support base which supports a base plate is used to mount one or more device packages on a circuit board or the like. The support base is adapted to be secured to the circuit board. The base plate has opposed major faces adapted for mating with device packages. Tongues or clips secure individual device packages on the major faces of the base plate independently to that device packages may be removeably attached to either or both sides of the base plate.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: November 23, 1999
    Assignee: Thermalloy, Inc.
    Inventors: Donald L. Clemens, Steven F. Edwards
  • Patent number: 5978227
    Abstract: The present invention is a rail-less bus system for a high density integrated circuit package, or module, made up of a plurality of vertically stacked high density integrated circuit devices. Each device has leads extending therefrom with bifurcated or trifurcated distal lead ends which electrically connect with lead ends of adjacent integrated circuit devices. The bus system provides a path for communication from the module to external electronic devices and internal communication between the individual integrated circuit devices in the module.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: November 2, 1999
    Assignee: Staktek Corporation
    Inventor: Carmen D. Burns
  • Patent number: 5930116
    Abstract: A heat sink for heat-generating electronic packages wherein the multiple heat-generating circuit packages are mounted on at least one surface of a heat sink and wherein the covers for the heat sink have protrusions thereon which, when the covers are in the closed position, engage the heat-generating circuit packages and hold them in heat transfer relationship with the heat sink.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: July 27, 1999
    Assignee: Harman International Industries, Incorporated
    Inventor: Daniel A. Palmer
  • Patent number: 5926373
    Abstract: A power supply and a method of manufacture therefor. The power supply includes: (1) a circuit board containing conductors for interconnecting electrical components of the power supply, (2) a thermally-conductive case having an integral electrically insulating layer, the thermally-conductive case forming a reservoir to receive the circuit board therein, (3) a power semiconductor device having a body connected in thermal communication with the thermally-conductive case and terminals coupled to the conductors of the circuit board, (4) an encapsulant, located within the reservoir, the encapsulant ensconcing the power semiconductor device and the electrical components and (5) electrical leads extending from the power supply that allow the power supply to be coupled to a printed wiring board.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: July 20, 1999
    Assignee: Lucent Technologies Inc.
    Inventor: David L. Stevens
  • Patent number: 5898128
    Abstract: An electronic component (10) has an electrically insulating substrate (20) that is encapsulated with an electrically conductive material (15) to provide thermal dissipation for the electronic component (10). The electrically insulating substrate (20) has cavities (21-24) that are either completely filled with an electrically conductive material (15) or are partially filled to provide recesses (26-27) for electronic devices (30,31). The electronic devices (30,31) are electrically coupled to the leads (60-63) of the electronic component (10) using either wire bonds (70) or metallic depositions (55-57).
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: April 27, 1999
    Assignee: Motorola, Inc.
    Inventors: Guillermo L. Romero, Christopher M. Scanlan, David M. Gilbert
  • Patent number: 5898573
    Abstract: A thermally and electrically conductive (TEC) pad is disposed between a PCB and a heat sink in a cellular telephone base station. The TEC pad includes at least one aperture that overlies one or more signal vias on a ground plane of the PCB. The TEC pad apertures are larger than any underlying signal vias in order to electrically isolate the signal vias from the conductive material of the pad and the heat sink. The TEC pad allows ground vias on a PCB ground plane to ground to the heat sink.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: April 27, 1999
    Assignee: Ericsson Inc.
    Inventor: Anthony Salvatore Fugaro
  • Patent number: 5892656
    Abstract: A thermoelectric generator system. The thermoelectric generator has at least one hot side heat exchanger and at least one cold side heat exchanger and at least one thermoelectric module with thermoelectric elements installed in an injection molded eggcrate. The thermoelectric modules are held in close contact with the hot side heat exchanger and the cold side heat sink with a spring force. A preferred embodiment contains eight modules held in compression between the hot and cold heat exchangers with Belville springs. The eggcrate is molded from a high temperature plastic with ridges provided for extra strength and tapered walls to permit ease of installation of the thermoelectric elements and stop tabs assure correct positioning of the elements. Electrical connections at hot and cold surfaces are preferably made by thermal spraying metallize coatings on the surfaces and then surface finishing the module to expose the walls of the eggcrate.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: April 6, 1999
    Inventor: John C. Bass
  • Patent number: 5880933
    Abstract: A heat sinking module cover for use with a potted electronic module assembly is disclosed. An electronic module assembly contains heat generating electrical components. Typically the electrical components are held in relation to a module housing. The module housing, generally, not only provides support but also acts as a heat sink for heat generating electrical components. The electrical components are covered by a potting compound. The potting compound protects the electrical components from dust or any other particles that could affect the function of the electrical component. The present invention discloses a heat sinking module cover with a support portion and a thermal transfer portion. The heat sinking module cover is positioned with respect to the module housing to form a box-like structure. The thermal transfer portion contacts the potting material directly to provide an additional heat sinking means for the electronic module assembly.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: March 9, 1999
    Assignee: DaimlerChrysler Corporation
    Inventors: Paul A. Markow, Karl W. Shock, Bradley S. Chupp, Frank R. Holmes, Terry P. Mach
  • Patent number: 5851337
    Abstract: A method for connecting TEHS to PBGA and a modified connecting structure for TEHS and PBGA are disclosed. The structure improves both heat dissipation efficiency of PBGA by TEHS with high heat conductivity and electrical performance of PBGA by TEHS which is electrically connected to the circuit in PBGA substrate. There are two methods of connecting TEHS to PBGA, including metallic soldering and nonmetallic adhesion. In the metallic soldering, the contact region of the TEHS is covered with a layer of solder tin and soldered to metallic contact region of the growing circuit in the substrate. In the nonmetallic adhesion, the metallic contact region of the growing circuit is covered with a layer of conductive resin. The TEHS is adhered and fixed to the metallic region by curing the conductive resin.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: December 22, 1998
    Assignee: Caesar Technology Inc.
    Inventor: Shih-Li Chen
  • Patent number: 5838543
    Abstract: A radio frequency power amplification module includes: a radiation section; a printed circuit board attached to the radiation section; a semiconductor device for power amplification, mounted on the printed circuit board; and a cap. The radiation section includes a plurality of radiation boards, the plurality of radiation boards at least including a first radiation board as a lowermost layer, and a second radiation board attached onto the first radiation board, the first radiation board being coupled to the cap.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: November 17, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Morio Nakamura, Masahiro Maeda
  • Patent number: 5835350
    Abstract: A power supply and a method of manufacture therefor. The power supply includes a circuit board containing conductors for interconnecting electrical components of the power supply and a thermally-conductive case having an integral electrically insulating layer. The thermally-conductive case forms a reservoir to receive the circuit board therein. The power supply further includes a power semiconductor device having a body connected in thermal communication with the thermally-conductive case and terminals coupled to the conductors of the circuit board. The power supply still further includes an encapsulant, located within the reservoir, capable of ensconcing the power semiconductor device and the electrical components. Additionally, electrical leads extend from the power supply that allow the power supply to be coupled to a printed wiring board.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: November 10, 1998
    Assignee: Lucent Technologies Inc.
    Inventor: David L. Stevens
  • Patent number: 5783862
    Abstract: A thermal interface 26 between a heat source (e.g., an IC die) 24 and a heat sink 28 comprises a metallic mesh (26a) filled with a thermally conductive semi-liquid substance (26b). The thermally conductive semi-liquid substance may comprise, e.g., silicone grease or paraffin. The wire mesh may comprise silver, copper and/or gold cloth.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: July 21, 1998
    Assignee: Hewlett-Packard Co.
    Inventor: Jeffrey L. Deeney
  • Patent number: 5744863
    Abstract: An aluminum or copper heat sink is attached to a ceramic cap or exposed semiconductor chip using flexible-epoxy to provide improved thermal performance. The aluminum may be coated by anodizing or chromate conversion or the copper may be coated with nickel. Such structures are especilly useful for CQFP, CBGA, CCGA, CPGA, TBGA, PBGA, DCAM, MCM-L, single layer ceramic, and other chip carrier packages as well as for flip chip attachment to flexible or rigid organic circuit boards. These adhesive materials withstand thermal cycle tests of 0.degree. to 100.degree. C. for 1,500 cycles, -25.degree. to 125.degree. C. for 400 cycles, and -40.degree. to 140.degree. C. for 300 cycles; and withstand continuous exposure at 130.degree. C. for 1000 hours without loss of strength. Flexible-epoxies have a modulus of elasticity below 100,000 psi and a glass transition temperature below 25.degree. C., are much stronger than typical silicone adhesives, and do not contaminate the module or circuit board with silicone.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 28, 1998
    Assignee: International Business Machines Corporation
    Inventors: Thomas Moran Culnane, Michael Anthony Gaynes, Ping Kwong Seto, Hussain Shaukatullah
  • Patent number: 5728248
    Abstract: A multi-tier laminate substrate with an internal heat spreader and method for making a multi-tier laminate substrate with an internal heat spreader for electronic device packaging are provided wherein a spacing mechanism is used to protect the bond fingers of a trace on a lower tier of the laminated substrate when a milling bit is used to cut an opening above a die cavity in the multi-tier substrate.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: March 17, 1998
    Assignee: Hestia Technologies, Inc.
    Inventor: Patrick O. Weber
  • Patent number: 5597643
    Abstract: A multi-tier laminate substrate with an internal heat spreader and method for making a multi-tier laminate substrate with an internal heat spreader for electronic device packaging are provided wherein a spacing mechanism is used to protect the bond fingers of a trace on a lower tier of the laminated substrate when a milling bit is used to cut an opening above a die cavity in the multi-tier substrate,.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: January 28, 1997
    Assignee: Hestia Technologies, Inc.
    Inventor: Patrick O. Weber
  • Patent number: 5590030
    Abstract: A circuit board includes a circuit-conductor layer, a ground layer and a power source layer superposed in a multilayer form through dielectric layers therebetween. A heat conduction through inside of the circuit board is enhanced so that circuit chips mounted on the circuit board can be cooled down to a level capable of operating normally. The circuit board can be formed to be compact. In order to enhance the heat transfer in the circuit board, at least one of the ground layer and power source layer is formed in a multilayer manner. It is preferable to form these layers at a thickness larger than that of the circuit-conductor layer. Further, preferably, the pin of the chip mounted on the board and at least one of the ground layer and power supply layer are connected to each other in such a manner as to enhance the heat conduction.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: December 31, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Masatsugu Kametani, Kazuhiro Umekita
  • Patent number: 5583377
    Abstract: A semiconductor device (10) provides heat dissipation while maintaining a low profile. The device includes a circuitized substrate (12) having an opening (20). Inserted into, or at least covering, the opening is a heat sink (22) having a base portion (24), sidewalls (26), and flanges (28). Flanges of the heat sink are attached or supported by a surface of the substrate. Together the base portion and sidewalls of the heat sink form a cavity for receiving a semiconductor die (13). The die is electrically coupled to conductive traces (14) formed on the substrate by wire bonds (19), and the traces are electrically coupled to solder balls (21) by conductive vias (18). In one embodiment, base portion (24) of heat sink (22) extends below substrate (12) to permit contact to a user substrate (34). While in another embodiment, a base portion (118) of a heat sink (116) is exposed on a top surface of a substrate (112) for coupling to another heat sink (124).
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: December 10, 1996
    Assignee: Motorola, Inc.
    Inventor: Leo M. Higgins, III
  • Patent number: 5583317
    Abstract: A controlled oxygen content copper clad laminate product. In accordance with one aspect of the present invention, there is provided a laminate having a first layer of oxygen-free copper joined to a second layer of oxygen-rich copper by the steps of (i) cladding the first layer to the second layer at a relatively low speed to minimize rolling friction, (ii) finish rolling the laminate to substantially increase its thickness tolerance, (iii) slitting the laminate to increase its width tolerance, (iv) profiling a groove at a selected location in the laminate, (v) finish slitting a plurality of ribbons from the laminate, (vi) tension leveling the laminate to straighten and flatten its shape, (vii) stamping the laminate into sections each of a selected configuration, (viii) cleaning laminate surfaces, and (ix) direct bonding the laminate to a substrate material such that the first layer is annealed to the second.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 10, 1996
    Assignee: Brush Wellman Inc.
    Inventors: Joseph P. Mennucci, Charles R. Mead
  • Patent number: 5581444
    Abstract: A method and mount for a high frequency IC that provides a low inductance path for a high frequency current from the IC to the exterior of a package for the IC and the mount. An electrically and thermally conductive metal base for mounting the IC on an upper surface thereof has a lower surface exposed at the exterior of the package that otherwise encloses the base and the IC. The base also has a plurality of solid or hollow columns for increasing a surface area of the mount, thereby decreasing the inductance to a high frequency current in the path between the IC and the lower surface of the base. Each column is electrically connected to a separate ground terminal on the IC. The columns may have narrow necks connecting them to the base to limit common mode inductance between columns, or may be separated from the base to eliminate common mode inductance.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: December 3, 1996
    Assignee: Harris Corporation
    Inventor: James P. Furino, Jr.
  • Patent number: 5561321
    Abstract: A composite substrate 30 is constituted by an alumina substrate 16, a metallic layer 34, and a copper sheet 26 bonded to the alumina substrate 16 via the metallic layer 34. The metallic layer 34 is constituted by a tungsten sub-layer 34a having a low coefficient of thermal expansion, a tungsten/silver-copper alloy mixture sub-layer 34b, and a silver-copper alloy sub-layer 34c having a high coefficient of thermal expansion. In the mixture sub-layer 34b, the ratio of the percentage content of the silver-copper alloy to that of the tungsten increases with distances from the alumina substrate 16.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: October 1, 1996
    Assignee: Noritake Co., Ltd.
    Inventors: Masanori Hirano, Noriyoshi Yamauchi
  • Patent number: 5561591
    Abstract: An electrically and thermally conductive rail assembly with impedance control for interconnecting individual level-one integrated circuit packages within a three-dimensional high density integrated circuit package, and methods of manufacturing same.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: October 1, 1996
    Assignee: Staktek Corporation
    Inventor: Carmen D. Burns
  • Patent number: 5557502
    Abstract: An integrated circuit package which has internal bonding pads that are located on bonding shelves and coupled to internal conductive power/ground planes by conductive strips that extend along the edges of the shelves. The edge strips eliminate the need for conventional vias to couple the bonding pads to the planes and thus reduce the cost and size of the package and improve package electrical performance (less inductive, less resistance path). The bonding pads are coupled to an integrated circuit that is mounted to a heat slug attached to a top surface of the package. The heat slug can function as both a ground path and a thermal sink for the integrated circuit. The package may have capacitors coupled to the internal routing of the package to reduce the electrical noise of the signals provided to the integrated circuit. Additionally, the package may have multiple power planes dedicated to different voltage levels.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: September 17, 1996
    Assignee: Intel Corporation
    Inventors: Koushik Banerjee, Debendra Mallik, Ashok Seth