Patents by Inventor Robert W. Rumsey

Robert W. Rumsey 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: 7273761
    Abstract: A lithographic pattern includes a first scribe along an edge of a die region, and a second scribe along an opposing edge of the die region. The first scribe includes at least a first translucent box and a second translucent box. The second scribe includes at least a first opaque box and a second opaque box defined respectively by a first translucent frame and a second translucent frame. When the lithographic pattern is stepped between fields on a wafer, the first translucent box is placed at least partially within the first opaque box, and the second translucent box is placed at least partially within the second opaque box. If a continuous ring is formed from a pair of a translucent box and an opaque box, the fields are aligned at least within an amount equal to the difference between the dimensions of that translucent box and that opaque box divided by 2.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: September 25, 2007
    Assignee: Micrel, Inc.
    Inventors: Robert W. Rumsey, Martin E. Garnett
  • Patent number: 6984531
    Abstract: A test structure pattern includes a first comb having a first set of tines, and a second comb having a second set of tines of the same width and spacing as the first set of tines. When the test structure pattern is stepped between fields on a wafer, the first comb and the second comb at least partially overlap on photoresist over a scribe lane between the fields. When the photoresist is developed, the overlap of the first comb and the second comb generates a metal comb. Electrical continuity is checked for the metal tines of the metal comb to determine the misalignment of the fields.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: January 10, 2006
    Assignee: Micrel, Inc.
    Inventor: Robert W. Rumsey
  • Patent number: 6815128
    Abstract: A lithographic pattern includes a first scribe along an edge of a die region, and a second scribe along an opposing edge of the die region. The first scribe includes at least a first translucent box and a second translucent box. The second scribe includes at least a first opaque box and a second opaque box defined respectively by a first translucent frame and a second translucent frame. When the lithographic pattern is stepped between fields on a wafer, the first translucent box is placed at least partially within the first opaque box, and the second translucent box is placed at least partially within the second opaque box. If a continuous ring is formed from a pair of a translucent box and an opaque box, the fields are aligned at least within an amount equal to the difference between the dimensions of that translucent box and that opaque box divided by 2.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: November 9, 2004
    Assignee: Micrel, Inc.
    Inventors: Robert W. Rumsey, Martin E. Garnett
  • Publication number: 20040219440
    Abstract: A test structure pattern includes a first comb having a first set of tines, and a second comb having a second set of tines of the same width and spacing as the first set of tines. When the test structure pattern is stepped between fields on a wafer, the first comb and the second comb at least partially overlap on photoresist over a scribe lane between the fields. When the photoresist is developed, the overlap of the first comb and the second comb generates a metal comb. Electrical continuity is checked for the metal tines of the metal comb to determine the misalignment of the fields.
    Type: Application
    Filed: June 1, 2004
    Publication date: November 4, 2004
    Inventor: Robert W. Rumsey
  • Patent number: 6762432
    Abstract: A test structure pattern includes a first comb having a first set of tines, and a second comb having a second set of tines of the same width and spacing as the first set of tines. When the test structure pattern is stepped between fields on a wafer, the first comb and the second comb at least partially overlap on photoresist over a scribe lane between the fields. When the photoresist is developed, the overlap of the first comb and the second comb generates a metal comb. Electrical continuity is checked for the metal tines of the metal comb to determine the misalignment of the fields.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: July 13, 2004
    Assignee: Micrel, Inc.
    Inventor: Robert W. Rumsey
  • Patent number: 6762434
    Abstract: A test structure pattern includes a first comb, a second comb, and a serpentine line. The first comb includes a first set of tines of the same orientation. The second comb includes a second set of tines of the same orientation that are interdigitated with the first set of tines. The serpentine line runs between the interdigitated tines of the first metal comb and the second metal comb. The test structure pattern forms a first metal comb, a second metal comb, and a serpentine metal line on a die. Print quality and resolution is tested by checking for electrical continuity in the serpentine metal line and bridging between the serpentine metal line and one of the first metal comb and the second metal comb.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: July 13, 2004
    Assignee: Micrel, Inc.
    Inventors: Robert W. Rumsey, Hiu F Ip, Arthur Lam
  • Patent number: 6649932
    Abstract: A test structure pattern includes a first comb, a second comb, and a serpentine line. The first comb includes a first set of tines of the same orientation. The second comb includes a second set of tines of the same orientation that are interdigitated with the first set of tines. The serpentine line runs between the interdigitated tines of the first metal comb and the second metal comb. The test structure pattern forms a first metal comb, a second metal comb, and a serpentine metal line on a die. Print quality and resolution is tested by checking for electrical continuity in the serpentine metal line and bridging between the serpentine metal line and one of the first metal comb and the second metal comb.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: November 18, 2003
    Assignee: Micrel, Inc.
    Inventors: Robert W. Rumsey, Hui F Ip, Arthur Lam
  • Publication number: 20030210058
    Abstract: A test structure pattern includes a first comb, a second comb, and a serpentine line. The first comb includes a first set of tines of the same orientation. The second comb includes a second set of tines of the same orientation that are interdigitated with the first set of tines. The serpentine line runs between the interdigitated tines of the first metal comb and the second metal comb. The test structure pattern forms a first metal comb, a second metal comb, and a serpentine metal line on a die. Print quality and resolution is tested by checking for electrical continuity in the serpentine metal line and bridging between the serpentine metal line and one of the first metal comb and the second metal comb.
    Type: Application
    Filed: April 23, 2003
    Publication date: November 13, 2003
    Inventors: Robert W. Rumsey, Hiu F. Ip, Arthur Lam
  • Publication number: 20030186473
    Abstract: A test structure pattern includes a first comb, a second comb, and a serpentine line. The first comb includes a first set of tines of the same orientation. The second comb includes a second set of tines of the same orientation that are interdigitated with the first set of tines. The serpentine line runs between the interdigitated tines of the first metal comb and the second metal comb. The test structure pattern forms a first metal comb, a second metal comb, and a serpentine metal line on a die. Print quality and resolution is tested by checking for electrical continuity in the serpentine metal line and bridging between the serpentine metal line and one of the first metal comb and the second metal comb.
    Type: Application
    Filed: April 1, 2002
    Publication date: October 2, 2003
    Inventors: Robert W. Rumsey, Hiu F. Ip, Arthur Lam
  • Publication number: 20030186132
    Abstract: A lithographic pattern includes a first scribe along an edge of a die region, and a second scribe along an opposing edge of the die region. The first scribe includes at least a first translucent box and a second translucent box. The second scribe includes at least a first opaque box and a second opaque box defined respectively by a first translucent frame and a second translucent frame. When the lithographic pattern is stepped between fields on a wafer, the first translucent box is placed at least partially within the first opaque box, and the second translucent box is placed at least partially within the second opaque box. If a continuous ring is formed from a pair of a translucent box and an opaque box, the fields are aligned at least within an amount equal to the difference between the dimensions of that translucent box and that opaque box divided by 2.
    Type: Application
    Filed: April 1, 2002
    Publication date: October 2, 2003
    Inventors: Robert W. Rumsey, Martin E. Garnett
  • Publication number: 20030186133
    Abstract: A test structure pattern includes a first comb having a first set of tines, and a second comb having a second set of tines of the same width and spacing as the first set of tines. When the test structure pattern is stepped between fields on a wafer, the first comb and the second comb at least partially overlap on photoresist over a scribe lane between the fields. When the photoresist is developed, the overlap of the first comb and the second comb generates a metal comb. Electrical continuity is checked for the metal tines of the metal comb to determine the misalignment of the fields.
    Type: Application
    Filed: April 1, 2002
    Publication date: October 2, 2003
    Inventor: Robert W. Rumsey