Patents by Inventor Amarjit S. Rai

Amarjit S. Rai 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: 6576549
    Abstract: A method and structure for forming a metalized blind via. A dielectric layer is formed on a metallic layer, followed by laser drilling a depression in the dielectric layer such that a carbon film that includes the carbon is formed on a sidewall of the depression. If the laser drilling does not expose the metallic layer, then an anisotropic plasma etching, such as a reactive ion etching (RIE), may be used to clean and expose a surface of the metallic layer. The dielectric layer includes a dielectric material having a carbon based polymeric material, such as a permanent photoresist, a polyimide, and advanced solder mask (ASM). The metallic layer includes a metallic material, such as copper, aluminum, and gold. The carbon film is in conductive contact with the metallic layer, and the carbon film is sufficiently conductive to permit electroplating a continuous layer of metal (e.g., copper) directly on the carbon film without need of an electrolessly plated layer underneath the electroplated layer.
    Type: Grant
    Filed: October 28, 2002
    Date of Patent: June 10, 2003
    Assignee: International Business Machines Corporation
    Inventors: Frank D. Egitto, Elizabeth Foster, Raymond T. Galasco, David E. Houser, Mark L. Janecek, Thomas E. Kindl, Jeffrey A. Knight, Stephen W. MacQuarrie, Voya R. Markovich, Luis J. Matienzo, Amarjit S. Rai, David J. Russell, William T. Wike
  • Publication number: 20030054635
    Abstract: A method and structure for forming a metalized blind via. A dielectric layer is formed on a metallic layer, followed by laser drilling a depression in the dielectric layer such that a carbon film that includes the carbon is formed on a sidewall of the depression. If the laser drilling does not expose the metallic layer, then an anisotropic plasma etching, such as a reactive ion etching (RIE), may be used to clean and expose a surface of the metallic layer. The dielectric layer comprises a dielectric material having a carbon based polymeric material, such as a permanent photoresist, a polyimide, and advanced solder mask (ASM). The metallic layer includes a metallic material, such as copper, aluminum, and gold. The carbon film is in conductive contact with the metallic layer, and the carbon film is sufficiently conductive to permit electroplating a continuous layer of metal (e.g., copper) directly on the carbon film without need of an electrolessly plated layer underneath the electroplated layer.
    Type: Application
    Filed: October 28, 2002
    Publication date: March 20, 2003
    Inventors: Frank D. Egitto, Elizabeth Foster, Raymond T. Galasco, David E. Houser, Mark L. Janecek, Thomas E. Kindl, Jeffrey A. Knight, Stephen W. MacQuarrie, Voya R. Markovich, Luis J. Matienzo, Amarjit S. Rai, David J. Russell, William T. Wike
  • Patent number: 6522014
    Abstract: A method and structure for forming a metalized blind via. A dielectric layer is formed on a metallic layer, followed by laser drilling a depression in the dielectric layer such that a carbon film that includes the carbon is formed on a sidewall of the depression. If the laser drilling does not expose the metallic layer, then an anisotropic plasma etching, such as a reactive ion etching (RIE), may be used to clean and expose a surface of the metallic layer. The dielectric layer comprises a dielectric material having a carbon based polymeric material, such as a permanent photoresist, a polyimide, and advanced solder mask (ASM). The metallic layer includes a metallic material, such as copper, aluminum, and gold. The carbon film is in conductive contact with the metallic layer, and the carbon film is sufficiently conductive to permit electroplating a continuous layer of metal (e.g., copper) directly on the carbon film without need of an electrolessly plated layer underneath the electroplated layer.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: February 18, 2003
    Assignee: International Business Machines Corporation
    Inventors: Frank D. Egitto, Elizabeth Foster, Raymond T. Galasco, David E. Houser, Mark L. Janecek, Thomas E. Kindl, Jeffrey A. Knight, Stephen W. MacQuarrie, Voya R. Markovich, Luis J. Matienzo, Amarjit S. Rai, David J. Russell, William T. Wike
  • Patent number: 6426565
    Abstract: An electronic package and method of making the electronic package is provided. An opening in the substrate of the electronic package is formed to substantially prevent adhesive which can bleed from under an electronic device from contacting conductive pads on the substrate. An electrical coupling is formed between the package's electronic device and conductive pads.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: July 30, 2002
    Assignee: International Business Machines Corporation
    Inventors: Ashwinkumar C. Bhatt, Paul E. Logan, Amarjit S. Rai
  • Patent number: 6207595
    Abstract: A fabric material and method of its manufacture suitable for use in electronic packages including chip carriers. High insulation resistance is exhibited when subjected to high temperatures and humidity stress conditions.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: March 27, 2001
    Assignee: International Business Machines Corporation
    Inventors: Bernd K. Appelt, Lawrence R. Blumberg, William T. Fotorny, Ross D. Havens, Robert M. Japp, Kostas Papathomas, Jan Obrzut, Mark D. Poliks, Amarjit S. Rai
  • Patent number: 6009620
    Abstract: A method of making a circuitized substrate wherein fill material is forced into the substrate's holes to thus provide additional support for conductive circuitry or the like thereon, thus increasing the final product's circuit density. The fill is provided in a substantially uncured state, following which partial cure occurs. Thereafter, the fill is substantially fully cured and the aforementioned circuit elements may then be provided directly thereon. Alternatively, a dual fill process is used with both quantities of uncured fill being disposed in each hole and then cured by a singular UV exposure step.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: January 4, 2000
    Assignee: International Business Machines Corporation
    Inventors: Ashwinkumar C. Bhatt, Joseph A. Kotylo, Kenneth S. Lyjak, Amarjit S. Rai, John A. Welsh