Patents Represented by Attorney Eric W. Petraske
  • Patent number: 7348250
    Abstract: Bipolar integrated circuits employing SiGe technology incorporate the provision of mask-selectable types of bipolar transistors. A high-performance/high variability type has a thin base in which the diffusion from the emitter intersects the base dopant diffusion within the “ramp” of Ge concentration near the base-collector junction and a lower performance/lower variability type has an additional epi layer in the base so that the emitter diffusion intersects the Ge ramp where the ramp has lower ramp rate.
    Type: Grant
    Filed: January 22, 2005
    Date of Patent: March 25, 2008
    Assignee: International Business Machines Corporation
    Inventor: Gregory G. Freeman
  • Patent number: 7220662
    Abstract: Fully silicided planar field effect transistors are formed by avoiding the conventional chemical-mechanical polishing step to expose the silicon gate by etching the sidewalls down to the silicon; depositing a sacrificial oxide layer thinner on the top of gate and sidewall of spacers, but thicker over the S/D areas, etching the oxide to expose the top of stacked gate while protecting the S/D; recessing the silicon; stripping the oxide; depositing metal and annealing to form silicide over the gate and S/D.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: May 22, 2007
    Assignee: International Business Machines Corporation
    Inventors: Huilong Zhu, Sunfei Fang, Zhijiong Luo
  • Patent number: 7195972
    Abstract: A trench capacitor DRAM cell in an SOI wafer uses the silicon device layer in the array as part of passing wordlines, stripping the silicon device layer in the array outside the wordlines and uses the BOX layer as the array top oxide separating the passing wordlines from the substrate.
    Type: Grant
    Filed: July 6, 2004
    Date of Patent: March 27, 2007
    Assignee: International Business Machines Corporation
    Inventors: Dureseti Chidambarrao, Ramachandra Divakaruni, Deok-kee Kim
  • Patent number: 7170126
    Abstract: A trench capacitor vertical-transistor DRAM cell in a SiGe wafer compensates for overhang of the pad nitride by forming an epitaxial strained silicon layer on the trench walls that improves transistor mobility, removes voids from the poly trench fill and reduces resistance on the bitline contact.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: January 30, 2007
    Assignee: International Business Machines Corporation
    Inventors: Kangguo Cheng, Dureseti Chidambarrao, Rama Divakaruni, Oleg G. Gluschenkov
  • Patent number: 7138308
    Abstract: A field effect transistor formed by a sacrificial gate process has a simplified process and improved yield by using a tunable resistant anti-reflective coating (TERA) as the cap layer over the sacrificial gate layer. The TERA layer serves as a tunable anti-reflection layer for photolithography patterning, a hardmask for etching the sacrificial gate, a polish stopping layer for planarization, and a blocking layer for preventing silicide formation over the sacrificial gate. The TERA is stripped by a two-step process that is highly selective to the nitride spacers, so that the spacers are not damaged in the process of stripping the sacrificial gate.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: November 21, 2006
    Assignee: International Business Machines Corporation
    Inventors: Kangguo Cheng, Ramachandra Divakaruni, Kenneth T. Settlemyer, Jr.
  • Patent number: 7087532
    Abstract: A process for forming sublithographic structures such as fins employs a hardmask protective layer above a hardmask to absorb damage during a dry etching step, thereby preserving symmetry in the hardmask and eliminating a source of defects.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: August 8, 2006
    Assignee: International Business Machines Corporation
    Inventors: David M Dobuzinsky, Jochen C. Beintner, Siddhartha Panda
  • Patent number: 7072901
    Abstract: An index generator that generates an index, which is data description contents, such as video contents, comprises: an index description device, for defining in advance basic index information concerning an index; a video display device for the input, the display or the output of contents to which an index is to be added; a triggering action input device, for accepting a triggering action in the contents that is displayed or output; and an index determination device, for generating index data based on the basic index information, which is defined by the index description device, and triggering action input history information, which is entered by the triggering action input device.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: July 4, 2006
    Assignee: International Business Machines Corporation
    Inventors: Masayoshi Teraguchi, Tomio Echigo, Takaaki Murao, Ken Masumitsu
  • Patent number: 7033881
    Abstract: In an MRAM cell, the writing current is encased in a low-reluctance material that is treated in one of several ways to render the material closest to the storage element ineffective to carry magnetic flux, thereby establishing a horseshoe-shaped cross section that focuses the flux toward the storage element.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: April 25, 2006
    Assignee: International Business Machines Corporation
    Inventors: Michael C. Gaidis, Phillip L. Trouilloud, Sivananda K. Kanakasabapathy, David W. Abraham
  • Patent number: 7023041
    Abstract: A versatile structure is formed, based on a deep trench, vertical transistor DRAM cell, that forms a conductive extension of the trench electrode in an elongated trench that contacts the lower electrode of the vertical transistor. The structure can be used as a capacitor, as a discrete transistor as a single-transistor amplifier or as a building block for more complex circuits.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: April 4, 2006
    Assignee: International Business Machines Corporation
    Inventors: Giuseppe La Rosa, Thomas W. Dyer, Oleg Gluschenkov, Jack A. Mandelman, Carl J. Radens, Alvin W. Strong
  • Patent number: 7018551
    Abstract: A method of forming integrated circuits having FinFET transistors includes a method of forming sub-lithographic fins, in which a mask defining a block of silicon including a pair of fins in reduced in width or pulled back by the thickness of one fin on each side, after which a second mask is formed around the first mask, so that after the first mask is removed, an aperture remains in the second mask having the width of the separation distance between the pair of fins. When the silicon is etched through the aperture, the fins are protected by the second mask, thereby defining fin thickness by the pullback step. An alternative method uses lithography of opposite polarity, first defining the central etch aperture between the two fins lithographically, then expanding the width of the aperture by a pullback step, so that filling the widened aperture with an etch-resistant plug defines the outer edges of the pair of fins, thereby setting the fin width without an alignment kstep.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: March 28, 2006
    Assignee: International Business Machines Corporation
    Inventors: Jochen C. Beintner, Dureseti Chidambarrao, Yujun Li, Kenneth T. Settlemyer, Jr.
  • Patent number: 6978230
    Abstract: Vertices of an annotation are projected onto a surface of a (2D or 3D) model and reconnected to preserve the original appearance of the annotation. The result of our method is a new set of geometry for the annotation that geometrically conforms to the surface of the model. A plane is defined by the midpoint of the original line segment and the two projected vertices. This plane is used to create the new line segments that conform to the surface, e.g. by doing a “surface walk” between the projected points along the line defined by the intersection of the plane and the surface.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: December 20, 2005
    Assignee: International Business Machines Corporation
    Inventors: James T. Klosowski, Frank Suits, William P. Horn, Gerard Lecina
  • Patent number: 6972461
    Abstract: A structure for use as a MOSFET employs an SOI wafer with a SiGe island resting on the SOI layer and extending between two blocks that serve as source and drain; epitaxially grown Si on the vertical surfaces of the SiGe forms the transistor channel. The lattice structure of the SiGe is arranged such that the epitaxial Si has little or no strain in the direction between the S and D and a significant strain perpendicular to that direction.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: December 6, 2005
    Assignee: International Business Machines Corporation
    Inventors: Xiangdong Chen, Dureseti Chidambarrao, Geng Wang, Huilong Zhu
  • Patent number: 6964897
    Abstract: A DRAM array in an SOI wafer having a uniform BOX layer extending throughout the array eliminates the collar oxide step in processing; connects the buried plates with an implant that, in turn, is connected to a conductive plug extending through the device layer and the box that is biased at ground; while the pass transistors are planar NFETs having floating bodies that have a leakage discharge path to ground through a grounded bitline.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: November 15, 2005
    Assignee: International Business Machines Corporation
    Inventors: Karen A. Bard, David M. Dobuzinsky, Herbert L. Ho, Mahendar Kumar, Denise Pendleton, Michael D. Steigerwalt, Brian L. Walsh
  • Patent number: 6955777
    Abstract: A plate for use in mixing and testing materials in the pharmaceutical industry is formed by a method in which apertures in a set of greensheets are formed by a material removal process, at least some of the apertures being filled with a fugitive material that escapes during sintering.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: October 18, 2005
    Assignee: International Business Machines Corporation
    Inventors: Govindarajan Natarajan, Umar Ahmad, Raschid J. Bezama, James N. Humenik, John U. Knickerbocker, Rao V. Vallabhaneni
  • Patent number: 6936511
    Abstract: A simple method of forming the buried strap in a trench DRAM sets the separation between the buried strap and the vertical transistor channel by control of the overetch in forming a recess of the buried strap material, instead of setting the separation by the thickness of the trench top oxide.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: August 30, 2005
    Assignee: International Business Machines Corporation
    Inventors: Ramachandra Divakaruni, Thomas W. Dyer
  • Patent number: 6933183
    Abstract: A selfaligned FinFET is fabricated by defining a set of fins in a semiconductor wafer, depositing gate material over the fins, defining a gate hardmask having a thickness sufficient to withstand later etching steps, etching the gates material outside the hardmask to form the gate, depositing a conformal layer of insulator over the gate and the fins, etching the insulator anistotropically until the insulator over the fins is removed down to the substrate, the hardmask having a thickness such that a portion of the hardmask remains over the gate and sidewalls remain on the gate, and forming source and drain areas in the exposed fins while the gate is protected by the hardmask material.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: August 23, 2005
    Assignee: International Business Machines Corporation
    Inventors: Jochen C. Beintner, Edward J. Nowak
  • Patent number: 6878611
    Abstract: In the preferred embodiment of this invention a method is described to convert patterned SOI regions into patterned SGOI (silicon-germanium on oxide) by the SiGe/SOI thermal mixing process to further enhance performance of the logic circuit in an embedded DRAM. The SGOI region acts as a template for subsequent Si growth such that the Si is strained, and electron and holes in the Si have higher mobility.
    Type: Grant
    Filed: January 2, 2003
    Date of Patent: April 12, 2005
    Assignee: International Business Machines Corporation
    Inventors: Devendra K. Sadana, Stephen W. Bedell, Tze-Chiang Chen, Kwang Su Choe, Keith E. Fogel
  • Patent number: 6869860
    Abstract: Isolation trenches and capacitor trenches containing vertical FETs (or any prior levels p-n junctions or dissimilar material interfaces) having an aspect ratio up to 60 are filled with a process comprising: applying a spin-on material based on silazane and having a low molecular weight; pre-baking the applied material in an oxygen ambient at a temperature below about 450 deg C.; converting the stress in the material by heating at an intermediate temperature between 450 deg C. and 800 deg C. in an H2O ambient; and heating again at an elevated temperature in an O2 ambient, resulting in a material that is stable up to 1000 deg C., has a compressive stress that may be tuned by variation of the process parameters, has an etch rate comparable to oxide dielectric formed by HDP techniques, and is durable enough to withstand CMP polishing.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: March 22, 2005
    Assignee: International Business Machines Corporation
    Inventors: Michael P. Belyansky, Rama Divakaruni, Laertis Economikos, Rajarao Jammy, Kenneth T. Settlemeyer, Jr., Padraic C. Shafer
  • Patent number: 6815749
    Abstract: In SOI integrated circuits having trench capacitor DRAM arrays, the decreasing thickness of the insulating layer causes cross-talk between the passing wordline traveling over the trench capacitor. Increasing the depth of the recess at the top of the trench and undercutting the insulating layer laterally permits the buried strap from the capacitor center electrode to make contact to the back side of the SOI layer, thereby increasing the vertical separation between the passing wordline and the strap.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: November 9, 2004
    Assignee: International Business Machines Corporation
    Inventors: Jack A. Mandelman, Herbert L. Ho
  • Patent number: 6793407
    Abstract: A set of interlocking modules supports and connects a die containing lasers, a set of precision molded lenses and a set of beam switching elements. Another embodiment of the invention is a structure for mounting a logic chip and an optical chip on a chip carrier, with the optical chip being mounted on the side of the carrier facing the system board on which the carrier is mounted, so that radiation travels in a straight path from optical sources on the optical chip into optical transmission guides on the board.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: September 21, 2004
    Assignee: International Business Machines Corporation
    Inventors: Lawrence Jacobowitz, John U. Knickerbocker, Ronald P. Luijten, Subhash L. Shinde