Patents by Inventor Kunal Parekh

Kunal Parekh 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: 20070032011
    Abstract: The invention includes methods of forming memory circuitry. In one implementation, a substrate is provided which has a memory array circuitry area and a peripheral circuitry area. The memory array circuitry area comprises transistor gate lines having a first minimum line spacing. The peripheral circuitry area comprises transistor gate lines having a second minimum line spacing which is greater than the first minimum line spacing. Anisotropically etched insulative sidewall spacers are formed over opposing sidewalls of individual of said transistor gate lines within the peripheral circuitry area prior to forming anisotropically etched insulative sidewall spacers over opposing sidewalls of individual of said transistor gate lines within the memory array area. Other aspects and implementations are contemplated.
    Type: Application
    Filed: August 2, 2005
    Publication date: February 8, 2007
    Inventors: Kunal Parekh, Suraj Mathew, Steve Cole
  • Publication number: 20070004132
    Abstract: The invention includes methods of forming memory circuitry. In one implementation, a semiconductor substrate includes a pair of word lines having a bit node received therebetween. A bit node contact opening is formed within insulative material over the bit node. Sacrificial plugging material is formed within the bit node contact opening between the pair of word lines. Sacrificial plugging material is removed from the bit node contact opening between the pair of word lines, and it is replaced with conductive material that is in electrical connection with the bit node. Thereafter, the conductive material is formed into a bit line.
    Type: Application
    Filed: September 5, 2006
    Publication date: January 4, 2007
    Inventors: Kunal Parekh, Byron Burgess
  • Publication number: 20060263987
    Abstract: The present invention relates to a laser fuse. The laser fuse comprises an element comprising a heat conductive material. The fuse also includes an absorption element comprising a material with an adjustable capacity for heat or light absorption that overlays the heat conductive element. The fuse also includes an outer insulating element that overlays and encloses the heat conductive element and the absorption element.
    Type: Application
    Filed: July 31, 2006
    Publication date: November 23, 2006
    Inventors: Mark Fischer, Zhiping Yin, Thomas Glass, Kunal Parekh, Gurtej Sandhu
  • Publication number: 20060264019
    Abstract: The invention includes methods of forming integrated circuitry, methods of forming memory circuitry, and methods of forming field effect transistors. In one implementation, conductive metal silicide is formed on some areas of a substrate and not on others. In one implementation, conductive metal silicide is formed on a transistor source/drain region and which is spaced from an anisotropically etched sidewall spacer proximate a gate of the transistor.
    Type: Application
    Filed: July 31, 2006
    Publication date: November 23, 2006
    Inventors: Kunal Parekh, John Zahurak
  • Publication number: 20060263969
    Abstract: The present invention is generally directed to a method of manufacturing sidewall spacers on a memory device, and a memory device comprising such sidewall spacers. In one illustrative embodiment, the method includes forming sidewall spacers on a memory device comprised of a memory array and at least one peripheral circuit by forming a first sidewall spacer adjacent a word line structure in the memory array, the first sidewall spacer having a first thickness and forming a second sidewall spacer adjacent a transistor structure in the peripheral circuit, the second sidewall spacer having a second thickness that is greater than the first thickness, wherein the first and second sidewall spacers comprise material from a single layer of spacer material.
    Type: Application
    Filed: May 19, 2005
    Publication date: November 23, 2006
    Inventors: David Hwang, Kunal Parekh, Michael Willett, Jigish Trivedi, Suraj Mathew, Greg Peterson
  • Publication number: 20060263947
    Abstract: The present invention relates to a laser fuse. The laser fuse comprises an element comprising a heat conductive material. The fuse also includes an absorption element comprising a material with an adjustable capacity for heat or light absorption that overlays the heat conductive element. The fuse also includes an outer insulating element that overlays and encloses the heat conductive element and the absorption element.
    Type: Application
    Filed: July 31, 2006
    Publication date: November 23, 2006
    Inventors: Mark Fischer, Zhiping Yin, Thomas Glass, Kunal Parekh, Gurtej Sandhu
  • Publication number: 20060258086
    Abstract: The invention includes methods in which an angled implant is utilized to self-align a source/drain region implant with the top edge of a gateline of a vertical transistor structure. The invention also includes methods in which an angled implant is utilized to implant dopant beneath the gateline of a vertical transistor structure. Vertical transistor structures formed in accordance with methodology of the present invention can be incorporated into various types of integrated circuitry, including, for example, DRAM arrays.
    Type: Application
    Filed: July 13, 2006
    Publication date: November 16, 2006
    Inventors: H. Manning, Kunal Parekh, Cem Basceri, Gurtej Sandhu
  • Publication number: 20060258087
    Abstract: The invention includes methods in which an angled implant is utilized to self-align a source/drain region implant with the top edge of a gateline of a vertical transistor structure. The invention also includes methods in which an angled implant is utilized to implant dopant beneath the gateline of a vertical transistor structure. Vertical transistor structures formed in accordance with methodology of the present invention can be incorporated into various types of integrated circuitry, including, for example, DRAM arrays.
    Type: Application
    Filed: July 13, 2006
    Publication date: November 16, 2006
    Inventors: H. Manning, Kunal Parekh, Cem Basceri, Gurtej Sandhu
  • Publication number: 20060240637
    Abstract: The invention includes methods of forming and/or passivating semiconductor constructions. In particular aspects, various oxides of a semiconductor substrate can be formed by exposing semiconductive material of the substrate to deuterium-enriched steam. In other aspects, a semiconductor construction is passivated by subjecting the construction to an anneal at a temperature of greater than or equal to 350° C. while exposing the construction to a deuterium-enriched ambient.
    Type: Application
    Filed: June 21, 2006
    Publication date: October 26, 2006
    Inventors: Kunal Parekh, Chandra Mouli, M. Roberts, Fernando Gonzalez
  • Publication number: 20060231528
    Abstract: The invention includes methods by which a fuse box of a semiconductor construction is fabricated to have a substantially uniform layer over fuses extending therein. In particular aspects, the invention includes methods in which one or more processing steps associated with fabrication and patterning of bond pads and redistribution layers is conducted simultaneously over a fuse box region to form and/or remove materials that are directly over the fuse box region.
    Type: Application
    Filed: June 15, 2006
    Publication date: October 19, 2006
    Inventors: Werner Juengling, Steven McDonald, Kunal Parekh
  • Publication number: 20060234469
    Abstract: In one aspect, the invention includes an isolation region forming method comprising: a) forming an oxide layer over a substrate; b) forming a nitride layer over the oxide layer, the nitride layer and oxide layer having a pattern of openings extending therethrough to expose portions of the underlying substrate; c) etching the exposed portions of the underlying substrate to form openings extending into the substrate; d) after etching the exposed portions of the underlying substrate, removing portions of the nitride layer while leaving some of the nitride layer remaining over the substrate; and e) after removing portions of the nitride layer, forming oxide within the openings in the substrate, the oxide within the openings forming at least portions of isolation regions.
    Type: Application
    Filed: April 21, 2006
    Publication date: October 19, 2006
    Inventors: David Dickerson, Richard Lane, Charles Dennison, Kunal Parekh, Mark Fischer, John Zahurak
  • Publication number: 20060216894
    Abstract: The invention includes methods of forming recessed access devices. A substrate is provided to have recessed access device trenches therein. A pair of the recessed access device trenches are adjacent one another. Electrically conductive material is formed within the recessed access device trenches, and source/drain regions are formed proximate the electrically conductive material. The electrically conductive material and source/drain regions together are incorporated into a pair of adjacent recessed access devices. After the recessed access device trenches are formed within the substrate, an isolation region trench is formed between the adjacent recessed access devices and filled with electrically insulative material to form a trenched isolation region.
    Type: Application
    Filed: March 25, 2005
    Publication date: September 28, 2006
    Inventors: Kunal Parekh, Suraj Mathew, Jigish Trivedi, John Zahurak, Sanh Tang
  • Publication number: 20060211208
    Abstract: The invention includes semiconductor constructions, methods of forming gatelines, and methods of forming transistor structures. The invention can include, for example, a damascene method of forming a gateline. A thin segment of dielectric material is formed between two thicker segments of dielectric material, with the thin and thicker segments of dielectric material being within an opening. A gateline material is formed within the opening and over the thin and thicker segments of dielectric material. The construction comprising the gateline material over the thin and thicker segments of dielectric material can be supported by a semiconductor substrate having a primary surface which defines a horizontal direction. The thin and thicker segments of dielectric material can comprise upper surfaces substantially parallel to the primary surface of the substrate, and can join to one another at steps having primary surfaces substantially orthogonal to the primary surface of the substrate.
    Type: Application
    Filed: May 5, 2006
    Publication date: September 21, 2006
    Inventors: Kunal Parekh, H. Manning
  • Publication number: 20060152601
    Abstract: The present invention relates to a digital camera having an imager pixel array and memory for storing images from the array, the memory is programmable to non-rewritably store images for subsequent readout. The non-rewritable memory storage permits a low cost image storage enabling the camera to be disposable or reconditioned for reuse.
    Type: Application
    Filed: January 13, 2005
    Publication date: July 13, 2006
    Inventor: Kunal Parekh
  • Publication number: 20060121677
    Abstract: The invention includes methods of forming integrated circuitry, methods of forming memory circuitry, and methods of forming field effect transistors. In one implementation, conductive metal silicide is formed on some areas of a substrate and not on others. In one implementation, conductive metal silicide is formed on a transistor source/drain region and which is spaced from an anisotropically etched sidewall spacer proximate a gate of the transistor.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 8, 2006
    Inventors: Kunal Parekh, John Zahurak
  • Publication number: 20060097327
    Abstract: A process for forming a semiconductor device comprises the steps of providing a semiconductor substrate assembly comprising a semiconductor wafer having an active area formed therein, a plurality of transistor gates each having a TEOS cap thereon and a pair of nitride spacers along each gate, a plurality of conductive plugs each contacting the wafer, and a BPSG layer overlying the transistor gates and contacting the active area. A portion of the BPSG layer is etched thereby exposing the TEOS caps. A portion of the BPSG layer remains on the active area after completion of the etch. Subsequently, a portion of the TEOS caps are removed to expose the transistor gates and a titanium silicide layer is formed simultaneously to contact the transistor gates and the plugs. An inventive structure resulting from the inventive process is also described.
    Type: Application
    Filed: December 16, 2005
    Publication date: May 11, 2006
    Inventors: Michael Hermes, Kunal Parekh
  • Publication number: 20060092726
    Abstract: A method and apparatus is provided for performing a redundancy programming. The system of the present invention includes a device testing unit for performing a memory test. The system also includes a memory device operatively coupled to the device testing unit. The memory device includes an access transistor that includes a charge trapping area. A threshold voltage of the access transistor is modified upon trapping of charges in the charge trapping unit. The memory device also includes a memory element and a fuse associated with the memory element. The fuse is capable of entering an alternative state in response to modifying the threshold voltage of the access transistor. The state of the fuse may be used to program or de-program the memory element.
    Type: Application
    Filed: December 12, 2005
    Publication date: May 4, 2006
    Inventor: Kunal Parekh
  • Publication number: 20060082004
    Abstract: The invention includes methods of forming memory circuitry. In one implementation, a semiconductor substrate includes a pair of word lines having a bit node received therebetween. A bit node contact opening is formed within insulative material over the bit node. Sacrificial plugging material is formed within the bit node contact opening between the pair of word lines. Sacrificial plugging material is removed from the bit node contact opening between the pair of word lines, and it is replaced with conductive material that is in electrical connection with the bit node. Thereafter, the conductive material is formed into a bit line.
    Type: Application
    Filed: December 1, 2005
    Publication date: April 20, 2006
    Inventors: Kunal Parekh, Byron Burgess
  • Publication number: 20060043462
    Abstract: A memory device having a field effect transistor with a stepped gate dielectric and a method of making the same are herein disclosed. The stepped gate dielectric is formed on a semiconductor substrate and consists of a pair of charge trapping dielectrics separated by a gate dielectric; a gate conductor is formed thereover. Source and drain areas are formed in the semiconductor substrate on opposing sides of the pair of charge trapping dielectrics. The memory device is made by forming a charge trapping dielectric layer on a semiconductor substrate. A trench is formed through the charge trapping dielectric layer to expose a portion of the semiconductor substrate. A gate dielectric layer is formed within the trench and a gate conductor layer is formed over the charge trapping and gate dielectric layers.
    Type: Application
    Filed: August 27, 2004
    Publication date: March 2, 2006
    Inventors: H. Manning, Kunal Parekh
  • Publication number: 20060043468
    Abstract: A memory device having a field effect transistor with a stepped gate dielectric and a method of making the same are herein disclosed. The stepped gate dielectric is formed on a semiconductor substrate and consists of a pair of charge trapping dielectrics separated by a gate dielectric; a gate conductor is formed thereover. Source and drain areas are formed in the semiconductor substrate on opposing sides of the pair of charge trapping dielectrics. The memory device is made by forming a charge trapping dielectric layer on a semiconductor substrate. A trench is formed through the charge trapping dielectric layer to expose a portion of the semiconductor substrate. A gate dielectric layer is formed within the trench and a gate conductor layer is formed over the charge trapping and gate dielectric layers.
    Type: Application
    Filed: October 25, 2005
    Publication date: March 2, 2006
    Inventors: H. Manning, Kunal Parekh