Patents by Inventor Rossella Ranica

Rossella Ranica 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: 9099354
    Abstract: The invention relates to an integrated circuit comprising a semi-conducting substrate and first and second cells. Each cell comprises first and second transistors of nMOS and pMOS type including first and second gate stacks including a gate metal. There are first and second ground planes under the first and second transistors and an oxide layer extending between the transistors and the ground planes. The gate metals of the nMOS and of a pMOS exhibit a first work function and the gate metal of the other pMOS exhibiting a second work function greater than the first work function. The difference between the work functions is between 55 and 85 meV and the first work function Wf1 satisfies the relation Wfmg?0.04?0.005*Xge<Wf1<Wfmg?0.03?0.005*Xge.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: August 4, 2015
    Assignees: Commissariat à l'énergie atomique et aux énergies alternatives, STMicroelectronics (Crolles 2) SAS
    Inventors: Olivier Weber, Nicolas Planes, Rossella Ranica
  • Publication number: 20150041900
    Abstract: The invention relates to an integrated circuit comprising a semi-conducting substrate and first and second cells. Each cell comprises first and second transistors of nMOS and pMOS type including first and second gate stacks including a gate metal. There are first and second ground planes under the first and second transistors and an oxide layer extending between the transistors and the ground planes. The gate metals of the nMOS and of a pMOS exhibit a first work function and the gate metal of the other pMOS exhibiting a second work function greater than the first work function. The difference between the work functions is between 55 and 85 meV and the first work function Wf1 satisfies the relation Wfmg?0.04?0.005*Xge<Wf1<Wfmg?0.03?0.005*Xge.
    Type: Application
    Filed: June 19, 2014
    Publication date: February 12, 2015
    Inventors: Olivier Weber, Nicolas Planes, Rossella Ranica
  • Patent number: 7709875
    Abstract: A memory cell with one MOS transistor formed in a floating body region isolated on its lower surface by a junction. A region of the same conductivity type as the floating body region but more heavily doped than said region is arranged under the drain region of the MOS transistor.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: May 4, 2010
    Assignee: STMicroelectronics Crolles 2 SAS
    Inventors: Alexandre Villaret, Pascale Mazoyer, Rossella Ranica
  • Patent number: 7541636
    Abstract: A memory cell with one transistor on a floating body region isolated by its lower surface by a junction. According to the present invention, the junction is non-planar and, for example, includes a protrusion directed towards the transistor surface.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: June 2, 2009
    Assignee: STMicroelectronics Crolles SAS
    Inventors: Rossella Ranica, Alexandre Villaret, Pascale Mazoyer
  • Patent number: 7428175
    Abstract: A dynamic random access memory (DRAM) including memory cells distributed in rows and in columns, each memory cell comprising a MOS transistor with a floating body, the memory comprising circuitry for writing a datum into a determined (i.e. selected) memory cell belonging to a determined (i.e. selected) row and to a determined (i.e. selected) column, wherein the write circuitry comprises circuitry capable of bringing the drains of the memory cells of the determined column to a voltage V1; circuitry capable of bringing the sources of the memory cells of the determined row to a voltage V2; and circuitry capable of bringing the drains of the memory cells of the columns other than the determined column and the sources of the memory cells of the rows other than the determined row to a voltage V3, voltages V1, V2, and V3 being such that |V1?V2|>|V3?V2| and (V1?V2)×(V3?V2)>0.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: September 23, 2008
    Assignee: STMicroelectronics, SA
    Inventors: Pierre Malinge, Rossella Ranica
  • Publication number: 20070133309
    Abstract: A dynamic random access memory (DRAM) comprising memory cells distributed in rows and in columns, each memory cell comprising a MOS transistor with a floating body, the memory comprising circuitry for writing a datum into a determined (i.e. selected) memory cell belonging to a determined (i.e. selected) row and to a determined (i.e. selected) column, wherein the write circuitry comprises circuitry capable of bringing the drains of the memory cells of the determined column to a voltage V1; circuitry capable of bringing the sources of the memory cells of the determined row to a voltage V2; and circuitry capable of bringing the drains of the memory cells of the columns other than the determined column and the sources of the memory cells of the rows other than the determined row to a voltage V3, voltages V1, V2, and V3 being such that |V1?V2|>|V3?V2| and (V1?V2)×(V3?V2)>0.
    Type: Application
    Filed: December 8, 2006
    Publication date: June 14, 2007
    Inventors: Pierre Malinge, Rossella Ranica
  • Publication number: 20070023809
    Abstract: A memory cell with one MOS transistor formed in a floating body region isolated on its lower surface by a junction. A region of the same conductivity type as the floating body region but more heavily doped than said region is arranged under the drain region of the MOS transistor.
    Type: Application
    Filed: July 25, 2006
    Publication date: February 1, 2007
    Applicant: STMicroelectronics S.A.
    Inventors: Alexandre Villaret, Pascale Mazoyer, Rossella Ranica
  • Publication number: 20070013030
    Abstract: A memory cell with one transistor on a floating body region isolated by its lower surface by a junction. According to the present invention, the junction is non-planar and, for example, includes a protrusion directed towards the transistor surface.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 18, 2007
    Applicant: STMicroelectronics Crolles 2 SAS
    Inventors: Rossella Ranica, Alexandre Villaret, Pascale Mazoyer
  • Publication number: 20070001165
    Abstract: A memory cell with one MOS transistor formed in a floating body region in which the lower surface of the source and drain regions, outside of the source extension and drain extension regions, rests on an insulating layer.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 4, 2007
    Applicant: STMicroelectronics Crolles 2 SAS
    Inventors: Rossella Ranica, Alexandre Villaret, Pascale Mazoyer