Patents by Inventor Steven H. Voldman

Steven H. Voldman 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).

  • Publication number: 20080301592
    Abstract: Apparatus and program product for designing vertical parallel plate (VPP) capacitor structures in which the capacitor plates in different conductive layers of the capacitor stack have a different physical spacing. The methodology optimizes the physical spacing of the plates in each conductive layer to achieve a targeted electrostatic discharge protection level and, thereby, supply electrostatic discharge robustness.
    Type: Application
    Filed: August 13, 2007
    Publication date: December 4, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Steven H. Voldman
  • Publication number: 20080297975
    Abstract: Vertical parallel plate (VPP) capacitor structures that utilize different spacings between conductive plates in different levels of the capacitor stack. The non-even spacings of the conductive plates in the capacitor stack decrease the susceptibility of the capacitor stack of the VPP capacitor to ESD-promoted failures. The non-even spacings may be material specific in that, for example, the spacings between adjacent conductive plates in different levels of the capacitor stack may be chosen based upon material failure mechanisms for plates containing different materials.
    Type: Application
    Filed: May 30, 2007
    Publication date: December 4, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ephrem G. Gebreselasie, Zhong-Xiang He, Steven H. Voldman
  • Patent number: 7459367
    Abstract: A P-N junction device and method of forming the same are disclosed. The P-N junction device may include a P-N diode, a PiN diode or a thyristor. The P-N junction device may have a monocrystalline or polycrystalline raised anode. In one embodiment, the P-N junction device results in a raised polycrystalline silicon germanium (SiGe) anode. In another embodiment, the P-N junction device includes a first terminal (anode) including a semiconductor layer positioned above an upper surface of a substrate and a remaining structure positioned in the substrate, the first terminal positioned over an opening in an isolation region; and a second terminal (cathode contact) positioned over the opening in the isolation region adjacent the first terminal. This latter embodiment reduces parasitic resistance and capacitance, and decreases the required size of a cathode implant area since the cathode contact is within the same STI opening as the anode.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: December 2, 2008
    Assignee: International Business Machines Corporation
    Inventors: Benjamin T. Voegeli, Steven H. Voldman
  • Publication number: 20080290524
    Abstract: A through via in an ultra high resistivity wafer and related methods are disclosed. A method for forming a through via comprises: providing a semiconductor wafer including a first silicon layer, a buried dielectric layer, and a substrate; forming a device on the first silicon; and forming a via from a side of the substrate opposite to the buried dielectric layer and through the substrate.
    Type: Application
    Filed: May 25, 2007
    Publication date: November 27, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Louis D. Lanzerotti, Max G. Levy, Yun Shi, Steven H. Voldman
  • Patent number: 7445966
    Abstract: A method, structure and design method for dissipating charge during fabrication of an integrated circuit. The structure includes: a substrate contact in a substrate; one or more wiring levels over the substrate; one or more electrically conductive charge dissipation structures extending from a top surface of an uppermost wiring level of the one or more wiring levels through each lower wiring level of the one or more wiring levels to and in electrical contact with the substrate contact; and circuit structures in the substrate and in the one or more wiring layers, the charge dissipation structures not electrically contacting any the circuit structures in any of the one or more wiring levels, the one or more charge dissipation structures dispersed between the circuit structures.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: November 4, 2008
    Assignee: International Business Machines Corporation
    Inventors: John J. Ellis-Monaghan, Jeffrey P. Gambino, Timothy D. Sullivan, Steven H. Voldman
  • Publication number: 20080265333
    Abstract: Disclosed is a triple well CMOS device structure that addresses the issue of latchup by adding an n+ buried layer not only beneath the p-well to isolate the p-well from the p-substrate but also beneath the n-well. The structure eliminates the spacing issues between the n-well and n+ buried layer by extending the n+ buried layer below the entire device. The structure also addresses the issue of threshold voltage scattering by providing a p+ buried layer below the entire device under the n+ buried layer or below the p-well side of the device only either under or above the n+ buried layer) Latchup robustness can further be improved by incorporating into the device an isolation structure that eliminates lateral pnp, npn, or pnpn devices and/or a sub-collector region between the n+ buried layer and the n-well.
    Type: Application
    Filed: July 9, 2008
    Publication date: October 30, 2008
    Applicant: International Business Machines Corporation
    Inventors: David S. Collins, James A. Slinkman, Steven H. Voldman
  • Patent number: 7442996
    Abstract: Disclosed is a triple well CMOS device structure that addresses the issue of latchup by adding an n+ buried layer not only beneath the p-well to isolate the p-well from the p? substrate but also beneath the n-well. The structure eliminates the spacing issues between the n-well and n+ buried layer by extending the n+ buried layer below the entire device. The structure also addresses the issue of threshold voltage scattering by providing a p+ buried layer below the entire device under the n+ buried layer or below the p-well side of the device only either under or above the n+ buried layer) Latchup robustness can further be improved by incorporating into the device an isolation structure that eliminates lateral pnp, npn, or pnpn devices and/or a sub-collector region between the n+ buried layer and the n-well.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: October 28, 2008
    Assignee: International Business Machines Corporation
    Inventors: David S. Collins, James A. Slinkman, Steven H. Voldman
  • Publication number: 20080258173
    Abstract: A P-N junction device and method of forming the same are disclosed. The P-N junction device may include a P-N diode, a PiN diode or a thyristor. The P-N junction device may have a monocrystalline or polycrystalline raised anode. In one embodiment, the P-N junction device results in a raised polycrystalline silicon germanium (SiGe) anode. In another embodiment, the P-N junction device includes a first terminal (anode) including a conductor layer positioned above an upper surface of a substrate and a remaining structure positioned in the substrate, the first terminal positioned over an opening in an isolation region; and a second terminal (cathode contact) positioned over the opening in the isolation region adjacent the first terminal. This latter embodiment reduces parasitic resistance and capacitance, and decreases the required size of a cathode implant area since the cathode contact is within the same STI opening as the anode.
    Type: Application
    Filed: June 25, 2008
    Publication date: October 23, 2008
    Inventors: Benjamin T. Voegeli, Steven H. Voldman
  • Patent number: 7439145
    Abstract: A diode structure fabrication method. In a P? substrate, an N+ layer is implanted. The N+ layer has an opening whose size affects the breakdown voltage of the diode structure. Upon the N+ layer, an N? layer is formed. Then, a P+ region is formed to serve as an anode of the diode structure. An N+ region can be formed on the surface of the substrate to serve as a cathode of the diode structure. By changing the size of the opening in the N+ layer during fabrication, the breakdown voltage of the diode structure can be changed (tuned) to a desired value.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: October 21, 2008
    Assignee: International Business Machines Corporation
    Inventor: Steven H. Voldman
  • Publication number: 20080254609
    Abstract: Method of making an electronic fuse blow resistor structure. In one embodiment, the method includes forming an insulator film, depositing a conductor on the insulator film, and after the depositing, etching the conductor to form a plurality of spaced apart non-conductive regions and a plurality of spaced-apart conductive regions. In another embodiment, the method includes forming the insulator film, forming a conductive sheet, and sub-dividing the conductive sheet into the plurality of conductive regions.
    Type: Application
    Filed: October 12, 2007
    Publication date: October 16, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Steven H. VOLDMAN
  • Publication number: 20080251846
    Abstract: A diode having a capacitance below 0.1 pF and a breakdown voltage of at least 500V. The diode has an anode of a first conductivity type and a cathode of a second conductivity type disposed below the anode. At least one of the cathode and anode have multiple, vertically abutting diffusion regions. The cathode and anode are disposed between and bounded by adjacent isolation regions.
    Type: Application
    Filed: May 12, 2008
    Publication date: October 16, 2008
    Inventor: Steven H. Voldman
  • Publication number: 20080237789
    Abstract: Disclosed are embodiments of a circuit (e.g., an electrostatic discharge (ESD) circuit), a design methodology and a design system. In the circuit, an ESD device is wired to a first metal level (e.g., M1). An inductor is formed in a second metal level (e.g., M5) above the first metal level and is aligned over and electrically connected in parallel to the ESD device by a single vertical via stack. The inductor is configured to nullify, for a given application frequency, the capacitance value of the ESD device. The quality factor of the inductor is optimized by providing, on a third metal level (e.g., M3) between the second metal level and the first metal level, a shield to minimize inductive coupling. An opening in the shield allows the via stack to pass through, trading off Q factor reduction for size-scaling and ESD robustness improvements.
    Type: Application
    Filed: March 29, 2007
    Publication date: October 2, 2008
    Inventors: Zhong-Xiang He, Robert M. Rassel, Steven H. Voldman
  • Patent number: 7427551
    Abstract: A resistor device structure and method of manufacture therefore, wherein the resistor device structure invention includes a plurality of alternating conductive film and insulative film layers, at least two of the conductive film layers being electrically connected in parallel to provide for high current flow through the resistor device at high frequencies with increased temperature and mechanical stability. The alternating conductive film and insulative film layers may be of a planar or non-planar geometric spatial orientation. The alternating conductive film and insulative film layers may include lateral and vertical portions designed to enable a uniform current density flow within the structure itself through a self-ballasting effect within the physical resistor.
    Type: Grant
    Filed: May 6, 2005
    Date of Patent: September 23, 2008
    Assignee: International Business Machines Corporation
    Inventors: Ebenezer E. Eshun, Steven H. Voldman
  • Publication number: 20080211064
    Abstract: A far subcollector, or a buried doped semiconductor layer located at a depth that exceeds the range of conventional ion implantation, is formed by ion implantation of dopants into a region of an initial semiconductor substrate followed by an epitaxial growth of semiconductor material. A reachthrough region to the far subcollector is formed by outdiffusing a dopant from a doped material layer deposited in the at least one deep trench that adjoins the far subcollector. The reachthrough region may be formed surrounding the at least one deep trench or only on one side of the at least one deep trench. If the inside of the at least one trench is electrically connected to the reachthrough region, a metal contact may be formed on the doped fill material within the at least one trench. If not, a metal contact is formed on a secondary reachthrough region that contacts the reachthrough region.
    Type: Application
    Filed: March 1, 2007
    Publication date: September 4, 2008
    Inventors: Bradley A. Orner, Robert M. Rassel, David C. Sheridan, Steven H. Voldman
  • Patent number: 7411305
    Abstract: A structure for improving the electrostatic discharge robustness of an integrated circuit having an electrostatic discharge (ESD) device and a receiver network connected to a pad by interconnects. The interconnect between the pad and the ESD device has a high-k material placed adjacent to at least one surface of the interconnect and extending over the thermal diffusion distance of the interconnect. The high-k material improves the critical current density of the interconnect by increasing the heat capacity and thermal conductivity of the interconnect. The high-k material can be placed on the sides, top and/or bottom of the interconnect. In multiple wire interconnects, the high-k material is placed between the wires of the interconnect. A low-k material is placed beyond the high-k material to reduce the capacitance of the interconnect. The combination of low-k and high-k materials provides an interconnect structure with improved ESD robustness and low capacitance that is well suited for an ESD device.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: August 12, 2008
    Assignee: International Business Machines Corporation
    Inventor: Steven H. Voldman
  • Publication number: 20080169572
    Abstract: A structure for improving the electrostatic discharge robustness of an integrated circuit having an electrostatic discharge (ESD) device and a receiver network connected to a pad by interconnects. The interconnect between the pad and the ESD device has a high-k material placed adjacent to at least one surface of the interconnect and extending over the thermal diffusion distance of the interconnect. The high-k material improves the critical current density of the interconnect by increasing the heat capacity and thermal conductivity of the interconnect. The high-k material can be placed on the sides, top and/or bottom of the interconnect. In multiple wire interconnects, the high-k material is placed between the wires of the interconnect. A low-k material is placed beyond the high-k material to reduce the capacitance of the interconnect. The combination of low-k and high-k materials provides an interconnect structure with improved ESD robustness and low capacitance that is well suited for an ESD device.
    Type: Application
    Filed: March 25, 2008
    Publication date: July 17, 2008
    Inventor: Steven H. Voldman
  • Patent number: 7401311
    Abstract: A structure, apparatus and method for circuits to minimize sensitivity to latch. The method includes, for example, identifying element density of at least one functional circuit block and element attributes of elements associated with the at least one functional circuit block. An element density function parameterized from the element attributes is formed. The placement of the at least one functional circuit block is modified relative to other functional circuit blocks based on the element density function to substantially eliminate latching effects in a circuit.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: July 15, 2008
    Assignee: International Business Machines Corporation
    Inventor: Steven H. Voldman
  • Publication number: 20080158747
    Abstract: An ESD network. The ESD network including a redundant voltage clamping element in series with a first voltage clamping element between two voltage pads. The ESD network may be connected to a power voltage pad or a signal voltage pad either directly or through a dummy voltage pad. The voltage clamping elements may further comprise an array of unit cells wherein the array is electrically equivalent to single large transistors currently used in ESD networks. By creating an ESD network as an array of unit cells, benefits greater than those obtained by using a single transistor as a clamping or a trigger element are realized such as increased ballast resistance and less overall damage to the circuitry resulting from cosmic rays and particles.
    Type: Application
    Filed: August 13, 2007
    Publication date: July 3, 2008
    Inventor: Steven H. Voldman
  • Publication number: 20080144240
    Abstract: An electrostatic-discharge protection circuit having a low level of current leakage from a first power supply to a second power supply. An example protection circuit includes a timing element that electrically decouples the first and second power supplies. Another example protection circuit includes two transistors connected via a node that is electrically decoupled from the second power supply.
    Type: Application
    Filed: December 18, 2006
    Publication date: June 19, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: John J. Ellis-Monaghan, Steven H. Voldman
  • Publication number: 20080135941
    Abstract: A trigger device. The device includes: a MOSFET comprising a source, a drain, a gate and a body; a modulating layer under the body; body and modulating layer contacts, the body contact separated from the source, drain and modulating contact by dielectric isolation in the body; the modulating layer contact separated from the source and drain by the dielectric isolation, the source and drain extending from a top surface of the body into the body a first distance, the body contact extending a second distance and the dielectric isolation extending a third distance, the third distance greater than the first or second distances; a first vertical bipolar transistor comprising the source, the body and the modulating layer; and a second vertical bipolar transistor comprising the drain, the body and the modulating layer.
    Type: Application
    Filed: January 25, 2008
    Publication date: June 12, 2008
    Inventors: Steven H. Voldman, Michael J. Zierak