Patents by Inventor Stephen McConnell Gates

Stephen McConnell Gates 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).

  • Patent number: 6756324
    Abstract: A thin film transistor is described incorporating a gate electrode, a gate insulating layer, a semiconducting channel layer deposited on top of the gate insulating layer, an insulating encapsulation layer positioned on the channel layer, a source electrode, a drain electrode and a contact layer beneath each of the source and drain electrodes and in contact with at least the channel layer, all of which are situated on a plastic substrate. By enabling the use of plastics having low glass transition temperatures as substrates, the thin film transistors may be used in large area electronics such as information displays and light sensitive arrays for imaging which are flexible, lighter in weight and more impact resistant than displays fabricated on traditional glass substrates. The thin film transistors are useful in active matrix liquid crystal displays where the plastic substrates are transparent in the visible spectrum.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: June 29, 2004
    Assignee: International Business Machines Corporation
    Inventor: Stephen McConnell Gates
  • Publication number: 20040115407
    Abstract: A diffusion barrier useful in semiconductor electronic devices, such as multi-level interconnect wiring structures, is provided. The diffusion barrier is characterized as having a low-dielectric constant of less than 3.5, preferably less than 3.0, as well as being capable of substantially preventing Cu and/or oxygen from diffusing into the active device areas of the electronic device. Since the diffusion barrier has a low-dielectric constant, the diffusion barrier has only a minor effect on the effective dielectric constant of the interconnect structure. The low-k diffusion barrier includes atoms of Si, C, H and N. The N atoms are non-uniformly distributed within the low-k diffusion barrier. Optionally, the low-k diffusion barrier may include atoms of Ge, O, halogens such as F or any combination thereof.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: International Business Machines Corporation
    Inventors: Stephan A. Cohen, Stephen McConnell Gates, Alfred Grill, Vishnubhai V. Patel
  • Patent number: 6737107
    Abstract: The present invention relates to a novel organosilicon particle having the formula SiaObCcHd. The particle may be coated with an organic film, preferably a rigid connector compound. The present invention also provides a method of using the organosilicon particle and/or rigid connector compound in the formation of a low-k dielectric film.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: May 18, 2004
    Assignee: International Business Machines Corporation
    Inventors: Stephen McConnell Gates, Christopher Bruce Murray
  • Patent number: 6737727
    Abstract: An apparatus and method is described incorporating one or more layers of SiCOH and one or more layers of patterned conductors in an integrated circuit chip. The invention overcomes the problem of capacitance by lowering the k of the delectric and overcomes the problem of breakdown voltage and the leakage curent by tailoring the composition of SiCOH.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: May 18, 2004
    Assignee: International Business Machines Corporation
    Inventors: Stephen McConnell Gates, Alfred Grill
  • Patent number: 6726996
    Abstract: A diffusion barrier that has a low dielectric constant, k, yet resistant to oxygen and/or moisture permeability is provided. The diffusion barrier includes a dielectric stack having at least two or more dielectric films, each film having a dielectric constant of about 8 or less, wherein the dielectric stack comprises alternating films composed of a high-permeability material and a low-permeability material. A semiconductor structure including substrate having at least one wiring region and the inventive diffusion barrier formed on a surface of the substrate is also provided.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: April 27, 2004
    Assignee: International Business Machines Corporation
    Inventors: Edward Paul Barth, Stephan A. Cohen, Chester Dziobkowski, John Anthony Fitzsimmons, Stephen McConnell Gates, Thomas Henry Ivers, Sampath Purushothaman, Darryl D. Restaino, Horatio Seymour Wildman
  • Patent number: 6724069
    Abstract: A spin-on cap useful as a post-CMP cap for Cu interconnect structures is provided. The inventive spin-on cap includes a low-k dielectric (on the order of 3.5 or less) and at least one additive. The at least one additive employed in the present invention is capable of binding Cu ions, and is soluble in the spun-on low-k dielectric. The spin-on cap of the present invention may further include a spun-on low-k (on the order of 3.5 or less) reactive-ion etch (RIE) stop layer. Spin-on caps containing a bilayer of low-dielectric plus at least additive and low-k RIE stop layer are preferred. It is noted that the inventive spin-on cap of the present invention does not significantly increase the effective dielectric constant of the interconnect structure and does not add additional cost to the fabrication of the interconnect structure since a single deposition tool, i.e., spin coating tool, is employed. Moreover, because of the presence of the additive in the spin-on cap, Cu migration is substantially minimized.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: April 20, 2004
    Assignee: International Business Machines Corporation
    Inventors: Timothy Joseph Dalton, Stephen McConnell Gates, Jeffrey Curtis Hedrick, Satyanarayana V. Nitta, Sampath Purushothaman, Christy Sensenich Tyberg
  • Patent number: 6716742
    Abstract: A low-k dielectric metal conductor interconnect structure having no micro-trenches present therein and a method of forming such a structure are provided. Specifically, the above structure is achieved by providing an interconnect structure which includes at least a multilayer of dielectric materials which are applied sequentially in a single spin apply tool and then cured in a single step and a plurality of patterned metal conductors within the multilayer of spun-on dielectrics. The control over the conductor resistance is obtained using a buried etch stop layer having a second atomic composition located between the line and via dielectric layers of porous low-k dielectrics having a first atomic composition. The inventive interconnect structure also includes a hard mask which assists in forming the interconnect structure of the dual damascene-type.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: April 6, 2004
    Assignee: International Business Machines Corporation
    Inventors: Stephen McConnell Gates, Jeffrey Curtis Hedrick, Satyanarayana V. Nitta, Sampath Purushothaman, Cristy Sensenich Tyberg
  • Patent number: 6710450
    Abstract: An interconnect structure including a patterned multilayer of spun-on dielectrics as well as methods for manufacturing the same are provided. The interconnect structure includes a patterned multilayer of spun-on dielectrics formed on a surface of a substrate. The patterned multilayer of spun-on dielectrics is composed of a bottom low-k dielectric, a buried etch stop layer, and a top low-k dielectric, wherein the bottom and top low-k dielectrics have a first composition, the said buried etch stop layer has a second composition which is different from the first composition and the buried etch stop layer is covalently bonded to said top and bottom low-k dielectrics. The interconnect structure further includes a polish stop layer formed on the patterned multilayer of spun-on dielectrics; and metal conductive regions formed within the patterned multilayer of spun-on dielectrics.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: March 23, 2004
    Assignee: International Business Machines Corporation
    Inventors: Stephen McConnell Gates, Jeffrey Curtis Hedrick, Satyanarayana V. Nitta, Sampath Purushothaman, Cristy Sensenich Tyberg
  • Publication number: 20040051178
    Abstract: A metal plus low dielectric constant (low-k) interconnect structure is provided for a semiconductor device wherein adjacent regions in a surface separated by a dielectric have dimensions in width and spacing in the sub 250 nanometer range, and in which reduced lateral leakage current between adjacent metal lines, and a lower effective dielectric constant than a conventional structure, is achieved by the positioning of a differentiating or mask member that is applied for the protection of the dielectric in subsequent processing operations, at a position about 2-5 nanometers below a, to be planarized, surface where there will be a lower electric field.
    Type: Application
    Filed: September 12, 2003
    Publication date: March 18, 2004
    Applicant: International Business Machines Corporation
    Inventors: Stephen Alan Cohen, Timothy Joseph Dalton, John Anthony Fitzsimmons, Stephen McConnell Gates, Brian Wayne Herbst, Sampath Purushothaman, Stanley Joseph Whitehair
  • Patent number: 6677680
    Abstract: A metal wiring plus low-k dielectric interconnect structure of the dual damascene-type is provided wherein the conductive metal lines and vias are built into a hybrid low-k dielectric which includes two spun-on dielectrics that have different atomic compositions and at least one of the two spun-on dielectrics is porous. The two spun-on dielectrics used in forming the inventive hybrid low-k dielectric each have a dielectric constant of about 2.6 or less, preferably each dielectric of the hybrid structure has a k of from about 1.2 to about 2.2. By utilizing the inventive hybrid low-k dielectric excellent control over metal line resistance (trench depth) is obtained, without no added cost. This is achieved without the use of a buried etch stop layer, which if present, would be formed between the two spun-on dielectrics.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: January 13, 2004
    Assignee: International Business Machines Corporation
    Inventors: Stephen McConnell Gates, Jeffrey Curtis Hedrick, Satyanarayana V. Nitta, Sampath Purushothaman, Cristy Sensenich Tyberg
  • Patent number: 6657305
    Abstract: A metal plus low dielectric constant (low-k) interconnect structure is provided for a semiconductor device wherein adjacent regions in a surface separated by a dielectric have dimensions in width and spacing in the sub 250 nanometer range, and in which reduced lateral leakage current between adjacent metal lines, and a lower effective dielectric constant than a conventional structure, is achieved by the positioning of a differentiating or mask member that is applied for the protection of the dielectric in subsequent processing operations, at a position about 2-5 nanometers below a, to be planarized, surface where there will be a lower electric field.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: December 2, 2003
    Assignee: International Business Machines Corporation
    Inventors: Stephen Alan Cohen, Timothy Joseph Dalton, John Anthony Fitzsimmons, Stephen McConnell Gates, Brian Wayne Herbst, Sampath Purushothaman, Stanley Joseph Whitehair
  • Publication number: 20030183937
    Abstract: A low-k dielectric metal conductor interconnect structure having no micro-trenches present therein and a method of forming such a structure are provided. Specifically, the above structure is achieved by providing an interconnect structure which includes at least a multilayer of dielectric materials which are applied sequentially in a single spin apply tool and then cured in a single step and a plurality of patterned metal conductors within the multilayer of spun-on dielectrics. The control over the conductor resistance is obtained using a buried etch stop layer having a second atomic composition located between the line and via dielectric layers of porous low-k dielectrics having a first atomic composition. The inventive interconnect structure also includes a hard mask which assists in forming the interconnect structure of the dual damascene-type.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 2, 2003
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Stephen McConnell Gates, Jeffrey Curtis Hedrick, Satyanarayana V. Nitta, Sampath Purushothaman, Cristy Sensenich Tyberg
  • Patent number: 6620659
    Abstract: The present invention describes the use of two semiconductor layers, a thin film (TF) layer and a bulk Si wafer layer, to make high density and high speed merged logic and memory IC chips. The memory cells use three-dimensional (3D) SRAM structures. Two kinds of 3D logic cells are disclosed. 3D form of the differential cascode voltage switch (DCVS) architecture, and a 3D form of the DCVS with pass gate (DCVSPG) logic architecture. A high density “system on chip” architecture is described. The high density is achieved by locating large PMOS transistors in the TF Si layer, and the fast NMOS transistors in a bulk Si wafer layer. A single process sequence to simultaneously make the logic and memory circuits on the IC chip is also described.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: September 16, 2003
    Assignee: International Business Machines Corporation
    Inventors: Philip George Emmma, Wei Hwang, Stephen McConnell Gates
  • Publication number: 20030170386
    Abstract: The present invention relates to a novel organosilicon particle having the formula SiaObCcHd. The particle may be coated with an organic film, preferably a rigid connector compound. The present invention also provides a method of using the organosilicon particle and/or rigid connector compound in the formation of a low-k dielectric film.
    Type: Application
    Filed: April 7, 2003
    Publication date: September 11, 2003
    Applicant: International Business Machines Corporation.
    Inventors: Stephen McConnell Gates, Christopher Bruce Murray
  • Patent number: 6603204
    Abstract: A low-k dielectric metal conductor interconnect structure having no micro-trenches present therein and a method of forming such a structure are provided. Specifically, the above structure is achieved by providing an interconnect structure which includes at least a multilayer of dielectric materials which are applied sequentially in a single spin apply tool and then cured in a single step and a plurality of patterned metal conductors within the multilayer of spun-on dielectrics. The control over the conductor resistance is obtained using a buried etch stop layer having a second atomic composition located between the line and via dielectric layers of porous low-k dielectrics having a first atomic composition. The inventive interconnect structure also includes a hard mask which assists in forming the interconnect structure of the dual damascene-type.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: August 5, 2003
    Assignee: International Business Machines Corporation
    Inventors: Stephen McConnell Gates, Jeffrey Curtis Hedrick, Satyanarayana V. Nitta, Sampath Purushothaman, Cristy Sensenich Tyberg
  • Patent number: 6599623
    Abstract: The present invention relates to a novel organosilicon particle having the formula SiaObCcHd. The particle may be coated with an organic film, preferably a rigid connector compound. The present invention also provides a method of using the organosilicon particle and/or rigid connector compound in the formation of a low-k dielectric film.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: July 29, 2003
    Assignee: International Business Machines Corporation
    Inventors: Stephen McConnell Gates, Christopher Bruce Murray
  • Patent number: 6562634
    Abstract: A magneto-resistive memory cell and a method of forming the memory cell, includes a substrate, a single crystalline semiconductor diode formed in the substrate; and a first thin film conductor recessed in the substrate, and a second thin film conductor formed above a magnetic tunnel junction formed on the diode. The diode and the first thin film conductor share a non-planar common surface, such that the metal tunnel junction is a predetermined distance from the thin film conductor.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: May 13, 2003
    Assignee: International Business Machines Corporation
    Inventors: Gary Bela Bronner, Stephen McConnell Gates, Roy Edwin Scheuerlein
  • Publication number: 20030075803
    Abstract: A low-k dielectric metal conductor interconnect structure having no micro-trenches present therein and a method of forming such a structure are provided. Specifically, the above structure is achieved by providing an interconnect structure which includes at least a multilayer of dielectric materials which are applied sequentially in a single spin apply tool and then cured in a single step and a plurality of patterned metal conductors within the multilayer of spun-on dielectrics. The control over the conductor resistance is obtained using a buried etch stop layer having a second atomic composition located between the line and via dielectric layers of porous low-k dielectrics having a first atomic composition. The inventive interconnect structure also includes a hard mask which assists in forming the interconnect structure of the dual damascene-type.
    Type: Application
    Filed: November 12, 2002
    Publication date: April 24, 2003
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Stephen McConnell Gates, Jeffrey Curtis Hedrick, Satyanarayana V. Nitta, Sampath Purushothaman, Cristy Sensenich Tyberg
  • Patent number: 6548901
    Abstract: An interconnect structure having reduced fringing fields of bottom corners of said interconnect structure and a method of fabricating the same is provided. The interconnect structure includes one or more interconnect levels one on top of each other, wherein each interconnect level is separated by a diffusion barrier and includes a dielectric stack of at least one low-k interlayer dielectric on at least one hybrid dielectric, said dielectrics having planar interfaces therebetween, each interconnect level further comprising metallic lines formed in said low-k interlayer dielectric, with the proviso that bottom horizontal portions of said metallic lines are not coincident with said interface, and said metallic lines are contained within said low-k interlayer dielectric. The interconnect structures may be fabricated such that top horizontal portions of the metallic lines are coplanar with a top surface of the low-k interlayer dielectric.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: April 15, 2003
    Assignee: International Business Machines Corporation
    Inventors: William Cote, Timothy Joseph Dalton, Daniel Charles Edelstein, Stephen McConnell Gates
  • Patent number: 6537908
    Abstract: A cost effective and simple method of patterning interconnect structures is provided in which spun-on materials are used as the hard mask. The use of spun-on materials for the hard mask ensures that the process is carried out in a single tool and it permits the use of a single curing step which is not typically employed in patterning processes wherein CVD hard masks are employed. The effective dielectric constant of the resultant structure is not significantly increased since the use of spin coating allows for selection of a polish stop layer (formed on a surface of a low-k dielectric) that has substantially the same dielectric constant as the underlying dielectric. In the present invention, the hard mask employed includes at least two spun-on dielectric materials that have different etch rates.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: March 25, 2003
    Assignee: International Business Machines Corporation
    Inventors: Ann Rhea-Helene Fornof, Stephen McConnell Gates, Jeffrey Curtis Hedrick, Satyanarayana V. Nitta, Sampath Purushothaman, Christy Sensenich Tyberg