Patents by Inventor William H. Shepherd
William H. Shepherd has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20030102572Abstract: A monolithic integrated structure including one or more packaged components such as integrated circuits, discreet components, LED's, photocouplers and the like is formed by placing electrically conductive lands on one surface of each packaged component, and then placing one or more packaged components into a substrate such that the surface of each packaged component containing the electrically conductive lands is visible and substantially coplanar with the top surface of the substrate. An electrically conductive layer is then formed over the top surface of the substrate, on the visible surfaces of each of the packaged components and on the electrically conductive lands contained thereon. The electrically conductive layer is then patterned using standard photolithographic techniques known in the semiconductor and printed circuit processing arts to form an electrical interconnect which connects the packaged components into a desired electrical circuit.Type: ApplicationFiled: September 13, 2001Publication date: June 5, 2003Inventors: Richard J. Nathan, William H. Shepherd
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Publication number: 20030057544Abstract: A monolithic integrated structure including one or more packaged components such as integrated circuits, discreet components, LED's, photocouplers and the like is formed by placing electrically conductive lands on one surface of each packaged component, and then placing one or more packaged components into a substrate such that the surface of each packaged component containing the electrically conductive lands is visible and substantially coplanar with the top surface of the substrate. An electrically conductive layer is then formed over the top surface of the substrate, on the visible surfaces of each of the packaged components and on the electrically conductive lands contained thereon. The electrically conductive layer is then patterned using standard photolithographic techniques known in the semiconductor and printed circuit processing arts to form an electrical interconnect which connects the packaged components into a desired electrical circuit.Type: ApplicationFiled: March 12, 2002Publication date: March 27, 2003Inventors: Richard J. Nathan, William H. Shepherd
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Publication number: 20030057563Abstract: One or more integrated circuit chips each containing conductive pads on one surface, are embedded in a substrate such that the conductive pads are exposed and the one surface of each chip is substantially coplanar with a top surface of the substrate. Electrically conductive material is placed over the one surface, including conductive pads, of each chip and the top surface of the substrate and patterned, using standard semiconductor or printed circuit photolithographic and processing techniques to form an electrically conductive interconnect pattern connecting the one or more integrated circuit chips into an electronic system.Type: ApplicationFiled: September 24, 2001Publication date: March 27, 2003Inventors: Richard J. Nathan, William H. Shepherd
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Publication number: 20030059976Abstract: One or more integrated circuit chips each containing conductive pads on one surface, are embedded in a substrate such that the conductive pads are exposed and the one surface of each chip is substantially coplanar with a top surface of the substrate. Electrically conductive material is placed over the one surface, including conductive pads, of each chip and the top surface of the substrate and patterned, using standard semiconductor or printed circuit photolithographic and processing techniques to form an electrically conductive interconnect pattern connecting the one or more integrated circuit chips into an electronic system.Type: ApplicationFiled: March 12, 2002Publication date: March 27, 2003Inventors: Richard J. Nathan, William H. Shepherd
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Patent number: 6528351Abstract: One or more integrated circuit chips each containing conductive pads on one surface, are embedded in a substrate such that the conductive pads are exposed and the one surface of each chip is substantially coplanar with a top surface of the substrate. Electrically conductive material is placed over the one surface, including conductive pads, of each chip and the top surface of the substrate and patterned, using standard semiconductor or printed circuit photolithographic and processing techniques to form an electrically conductive interconnect pattern connecting the one or more integrated circuit chips into an electronic system.Type: GrantFiled: September 24, 2001Date of Patent: March 4, 2003Assignee: JigSaw tek, Inc.Inventors: Richard J. Nathan, William H. Shepherd
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Patent number: 6034427Abstract: An integrated circuit (IC) package substrate has a dielectric layer and a micro filled via formed substantially in the center of a hole in the dielectric layer. The IC package substrate has at least one chip bonding pad and one ball attach pad that are electrically coupled to each other by the micro filled via. The micro filled via is formed of a material called a "micro filled via material" that includes a binding material and optionally includes a number of particles (between 0%-90% by volume) dispersed in the binding material. The binding material can be any material, such as a polymer that is either conductive or nonconductive. The particles can be formed of any conductive material, such as a conductive polymer or a conductive metal (e.g. copper or gold). An electrical conductor can be originally formed simply by contact between conductive particles located adjacent to each other.Type: GrantFiled: January 28, 1998Date of Patent: March 7, 2000Assignee: Prolinx Labs CorporationInventors: James J. D. Lan, Steve S. Chiang, Paul Y. F. Wu, William H. Shepherd, John Y. Xie, Hang Jiang
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Patent number: 5962815Abstract: A multilayered structure, such as a printed circuit board, includes a first conductive layer and a second conductive layer that are separated from each other by a dielectric layer. The dielectric layer is formed of a first material, such as a photoimagible polyimide and epoxy resin. The dielectric layer has a number of via holes that extend from the first conductive layer to the second conductive layer. The via holes are filled with a second material having a breakdown voltage less than a breakdown voltage of the first material included in the dielectric layer to form an antifuse. The second material in the via holes can be, for example, a conductive epoxy resin or a polymer loaded with conductive particles (also referred to as "conductive paste").Type: GrantFiled: January 18, 1995Date of Patent: October 5, 1999Assignee: Prolinx Labs CorporationInventors: James J. D. Lan, Steve S. Chiang, William H. Shepherd, Paul Y. F. Wu
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Patent number: 5906042Abstract: A micro filled material includes a binding material and optionally includes a number of particles. The binding material and the particles can be formed of any conductive or nonconductive material. Using such a micro filled via material, an electrical conductor is formed in a substrate for supporting one or more electronic components using the following steps: placing the micro filled via material between two conductive layers at various locations in a substrate at which an electrical conductor is to be formed; and optionally programming the micro filled via material to reduce the resistance of, or to form an electrical conductor.Type: GrantFiled: October 4, 1995Date of Patent: May 25, 1999Assignee: Prolinx Labs CorporationInventors: James J. D. Lan, Steve S. Chiang, William H. Shepherd, Paul Y. F. Wu, John Y. Xie
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Patent number: 5906043Abstract: In one embodiment, the steps for forming an electrical conductor between conductive layers of a printed circuit board include the following steps: (1) applying a first dielectric material on a first conductive layer; (2) forming a number of via holes at each of the predetermined locations in the first dielectric material at which an electrical conductor is to be formed; (3) selectively applying a second dielectric material to at least fill each of the via holes, to form a composite dielectric layer; (4) applying a second conductive layer on the composite dielectric layer; (5) etching the first conductive layer to form a first electrode; (6) etching the second conductive layer to form a second electrode; and (7) applying a programming voltage across the second dielectric material in each of the via holes to form an electrical conductor in each of the via holes, each electrical conductor connecting an electrode in the first conductive layer to an electrode in the second conductive layer.Type: GrantFiled: June 30, 1997Date of Patent: May 25, 1999Assignee: Prolinx Labs CorporationInventors: James J. D. Lan, Steve S. Chiang, William H. Shepherd, Paul Y. F. Wu
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Patent number: 5834824Abstract: A novel antifuse includes a composite of conductive particles dispersed throughout a nonconductive matrix, which composite is located inside an antifuse via. The antifuse via is defined by a dielectric layer that separates two electrodes. The electrodes can be located in the same conductive layer plane (typically parallel to and isolated from one another) or in two different conductive planes (typically formed transverse to one another and separated by a dielectric with an antifuse via formed therein). The electrodes can be coupled to, for example, active or passive regions of the integrated circuit. One embodiment of an antifuse (also called "composite antifuse") has only the composite in an antifuse via between the two conductive layers. Another embodiment of an antifuse (also called "hybrid antifuse") includes in addition to the composite, one or more thin dielectric layers also located in the antifuse via between the two conductive layers.Type: GrantFiled: March 14, 1995Date of Patent: November 10, 1998Assignee: Prolinx Labs CorporationInventors: William H. Shepherd, Steve S. Chiang, John Y. Xie
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Patent number: 5808351Abstract: Two types of programmable elements, fuses and antifuses, are disclosed for forming an electrically programmable burn-in board in one embodiment and an electrically programmable device-under-test (DUT) card in another embodiment. Both types of programmable elements can also be used in a reconfiguration device for interconnecting electrical contacts in a first configuration to electrical contacts in a second configuration. The various embodiments of this invention include, for example, a component socket, a socket adapter, a cable, a cable adapter, a scrambler card for a burn-in board and a device-under-test card for a burn-in board. A method for forming a fuse is also disclosed.Type: GrantFiled: October 7, 1994Date of Patent: September 15, 1998Assignee: Prolinx Labs CorporationInventors: Richard J. Nathan, James J. D. Lan, Steve S. Chiang, William H. Shepherd
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Patent number: 5767575Abstract: An integrated circuit (IC) package substrate has a dielectric layer and a micro filled via formed substantially in the center of a hole in the dielectric layer. The IC package substrate has at least one chip bonding pad and one ball attach pad that are electrically coupled to each other by the micro filled via. The micro filled via is formed of a material called a "micro filled via material" that includes a binding material and optionally includes a number of particles (between 0%-90% by volume) dispersed in the binding material. The binding material can be any material, such as a polymer that is either conductive or nonconductive. The particles can be formed of any conductive material, such as a conductive polymer or a conductive metal (e.g. copper or gold). An electrical conductor can be originally formed simply by contact between conductive particles located adjacent to each other.Type: GrantFiled: October 17, 1995Date of Patent: June 16, 1998Assignee: Prolinx Labs CorporationInventors: James J. D. Lan, Steve S. Chiang, Paul Y. F. Wu, William H. Shepherd, John Y. Xie, Hang Jiang
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Patent number: 5536672Abstract: A ferroelectric capacitor structure is designed for fabrication together with MOS devices on a semiconductor substrate. The ferroelectric capacitor includes a diffusion barrier above the surface of the substrate for preventing the materials of the ferroelectric capacitor from contaminating the substrate or MOS devices. The ferroelectric capacitor comprises a bottom electrode, a thin film ferroelectric layer and a top electrode. An interlayer dielectric is formed to cover portions of the ferroelectric thin film and provide an opening therethrough for the top electrode. A ferroelectric memory cell comprises a field effect transistor together with a ferroelectric capacitor fabricated on a semiconductor substrate. In one configuration, the ferroelectric capacitor is offset from the field effect transistor, while in another configuration, the ferroelectric capacitor is substantially above the field effect transistor to provide greater density.Type: GrantFiled: September 24, 1992Date of Patent: July 16, 1996Assignee: National Semiconductor CorporationInventors: William D. Miller, Joseph T. Evans, Wayne I. Kinney, William H. Shepherd
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Patent number: 5236550Abstract: The present invention provides a process for patterning ruthenium. A layer of ruthenium is formed on a substrate. The ruthenium is masked. The ruthenium is exposed to an oxygen plasma.Type: GrantFiled: April 24, 1992Date of Patent: August 17, 1993Assignee: National Semiconductor CorporationInventors: Norman E. Abt, William H. Shepherd
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Patent number: 5046043Abstract: A ferroelectric capacitor structure is designed for fabrication together with MOS devices on a semiconductor substrate. The ferroelectric capacitor includes a diffusion barrier layer above the surface of the substrate for preventing the materials of the ferroelectric capcacitor from contaminating the substrate or MOS devices. The ferroelectric capacitor comprises a bottom electrode, a thin film ferroelectric layer and a top electrode. An interlayer dielectric is formed to cover portions of the ferroelectric thin film and provide an opening therethrough for the top electrode. A ferroelectric memory cell comprises a field effect transistor together with a ferroelectric capacitor fabricated on a semiconductor substrate. In one configuration, the ferroelectric capacitor is offset from the field effect transistor, while in another configuration, the ferroelectric capacitor is substantially above the field effect transistor to provide greater density.Type: GrantFiled: October 8, 1987Date of Patent: September 3, 1991Assignee: National Semiconductor CorporationInventors: William D. Miller, Joseph T. Evans, Wayne I. Kinney, William H. Shepherd
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Patent number: 4982309Abstract: Electrodes composed of ruthenium, iridium, osmium, or rhodium and the electrically conductive oxides of these metals are particularly well-suited to use in electrical ceramic oxide devices because of the low resistivity of the oxides and the stability of the oxides under the processing conditions necessary to optimize performance of electrical ceramic oxide materials.Type: GrantFiled: July 17, 1989Date of Patent: January 1, 1991Assignee: National Semiconductor CorporationInventor: William H. Shepherd
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Patent number: 4151540Abstract: High beta, high frequency transistors require very narrow and high resistance base structures, thereby placing a low limit of collector-emitter voltages that may be used without encountering "punch-through" breakdown. This invention permits the use of normal collector-emitter voltages without danger of punch-through problems by injecting into the high resistance base material an impurity grid that serves both as an electrostatic shield to increase the voltage breakdown level, and as a means of reducing the apparent lateral base resistance, thereby further increasing the high frequency capability of the device without degrading the high beta characteristics.Type: GrantFiled: December 8, 1977Date of Patent: April 24, 1979Assignee: Fairchild Camera and Instrument CorporationInventors: Wendell B. Sander, William H. Shepherd