Patents by Inventor Christian Caillat
Christian Caillat 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).
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Patent number: 9076726Abstract: A method for tuning the effective work function of a gate structure in a semiconductor device is described. The semiconductor device is part of an integrated circuit and the gate structure has a metal layer and a high-k dielectric layer separating the metal layer from an active layer of the semiconductor device. The method includes providing an interconnect structure of the integrated circuit on top of the gate structure, the interconnect structure comprising a layer stack comprising at least a pre-metal dielectric layer comprising a metal filled connecting via connected to the gate structure through the pre-metal dielectric layer, and the interconnect structure having an upper exposed metal portion; and, thereafter, exposing at least a portion of the upper exposed metal portion to a plasma under predetermined exposure conditions, to tune the effective work function of the gate structure.Type: GrantFiled: December 18, 2013Date of Patent: July 7, 2015Assignee: IMECInventors: Thomas Kauerauf, Alessio Spessot, Christian Caillat
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Publication number: 20140291763Abstract: Techniques for providing a semiconductor memory device are disclosed. In one embodiment, the techniques may be realized as a semiconductor memory device including a plurality of memory cells arranged in an array of rows and columns. Each memory cell may include a first region connected to a source line extending in a first orientation, a second region connected to a bit line extending a second orientation, and a body region spaced apart from and capacitively coupled to a word line, wherein the body region is electrically floating and disposed between the first region and the second region. The semiconductor device may also include a first barrier wall extending in the first orientation of the array and a second barrier wall extending in the second orientation of the array and intersecting with the first barrier wall to form a trench region configured to accommodate each of the plurality of memory cells.Type: ApplicationFiled: June 9, 2014Publication date: October 2, 2014Applicant: MICRON TECHNOLOGY, INC.Inventors: Michael A. VAN BUSKIRK, Christian CAILLAT, Viktor I. KOLDIAEV, Jungtae KWON, Pierre C. FAZAN
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Publication number: 20140187039Abstract: A method for tuning the effective work function of a gate structure in a semiconductor device is described. The semiconductor device is part of an integrated circuit and the gate structure has a metal layer and a high-k dielectric layer separating the metal layer from an active layer of the semiconductor device. The method includes providing an interconnect structure of the integrated circuit on top of the gate structure, the interconnect structure comprising a layer stack comprising at least a pre-metal dielectric layer comprising a metal filled connecting via connected to the gate structure through the pre-metal dielectric layer, and the interconnect structure having an upper exposed metal portion; and, thereafter, exposing at least a portion of the upper exposed metal portion to a plasma under predetermined exposure conditions, to tune the effective work function of the gate structure.Type: ApplicationFiled: December 18, 2013Publication date: July 3, 2014Applicant: IMECInventors: Thomas Kauerauf, Alessio Spessot, Christian Caillat
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Patent number: 8748959Abstract: A semiconductor memory device is disclosed. In one particular exemplary embodiment, the semiconductor memory device includes a plurality of memory cells arranged in an array of rows and columns. Each memory cell may include a first region connected to a source line extending in a first orientation. Each memory cell may also include a second region connected to a bit line extending a second orientation. Each memory cell may further include a body region spaced apart from and capacitively coupled to a word line, wherein the body region is electrically floating and disposed between the first region and the second region. The semiconductor device may also include a first barrier wall extending in the first orientation and a second barrier wall extending in the second orientation and intersecting with the first barrier wall to form a trench region configured to accommodate each of the plurality of memory cells.Type: GrantFiled: March 31, 2010Date of Patent: June 10, 2014Assignee: Micron Technology, Inc.Inventors: Michael A. Van Buskirk, Christian Caillat, Viktor I Koldiaev, Jungtae Kwon, Pierre C. Fazan
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Publication number: 20140106556Abstract: A method of manufacturing a dual work function semiconductor device is disclosed. In one aspect, the method includes providing a substrate having first and second areas for forming first and second transistor types. The method additionally includes forming a dielectric layer on the substrate, which extends to cover at least parts of the first and second areas. The method additionally includes forming a first metal layer/stack on the dielectric layer in the first area, where the first metal layer/stack comprises a first work function-shifting element. The method additionally includes forming a second metal layer/stack on the first metal layer in the first area and on the dielectric layer in the second area, where the second metal layer/stack comprises a second work function-shifting element.Type: ApplicationFiled: October 7, 2013Publication date: April 17, 2014Applicant: IMECInventors: Tom Schram, Christian Caillat, Alessio Spessot, Pierre Fazan, Lars-Ake Ragnarsson, Romain Ritzenthaler
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Patent number: 8518793Abstract: A method for forming a MIM capacitor structure includes the steps of obtaining a base structure provided with a recess, the recess exposing a conductive bottom electrode plug; selectively growing Ru on the bottom electrode plug, based on a difference in incubation time of Ru growth on the bottom electrode plug compared to the base structure material; oxidizing the selectively grown Ru; depositing a Ru-comprising bottom electrode over the oxidized Ru; forming a dielectric layer on the Ru-comprising bottom electrode; and—forming a conductive top electrode over the dielectric layer.Type: GrantFiled: October 17, 2012Date of Patent: August 27, 2013Assignee: IMECInventors: Min-Soo Kim, Christian Caillat, Johan Swerts
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Patent number: 7994560Abstract: An integrated circuit includes a substrate and at least one active region. A transistor produced in the active region separated from the substrate. This transistor includes a source or drain first region and a drain or source second region which are connected by a channel. A gate structure is position on top of said channel and operates to control the channel. The gate structure is formed in a trench whose sidewalls have a shape which converges (narrows) in the width dimension towards the substrate. A capacitor is also formed having a first electrode, a second electrode and a dielectric layer between the electrodes. This capacitor is also formed in a trench. An electrode line is connected to the first electrode of the capacitor. The second electrode of the capacitor is formed in a layer shared in common with at least part of the drain or source second region of the transistor. A bit line is located beneath the gate structure. The integrated circuit may, for example, be a DRAM memory cell.Type: GrantFiled: July 15, 2008Date of Patent: August 9, 2011Assignee: STMicroelectronics (Crolles 2) SASInventors: Christian Caillat, Richard Ferrant
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Publication number: 20100259964Abstract: Techniques for providing a semiconductor memory device are disclosed. In one particular exemplary embodiment, the techniques may be realized as a semiconductor memory device including a plurality of memory cells arranged in an array of rows and columns. Each memory cell may include a first region connected to a source line extending in a first orientation. Each memory cell may also include a second region connected to a bit line extending a second orientation. Each memory cell may further include a body region spaced apart from and capacitively coupled to a word line, wherein the body region is electrically floating and disposed between the first region and the second region. The semiconductor device may also include a first barrier wall extending in the first orientation of the array and a second barrier wall extending in the second orientation of the array and intersecting with the first barrier wall to form a trench region configured to accommodate each of the plurality of memory cells.Type: ApplicationFiled: March 31, 2010Publication date: October 14, 2010Applicant: Innovative Silicon ISi SAInventors: Michael A. Van Buskirk, Christian Caillat, Viktor I. Koldiaev, Jungtae Kwon, Pierre C. Fazan
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Publication number: 20090121269Abstract: An integrated circuit includes a substrate and at least one active region. A transistor produced in the active region separated from the substrate. This transistor includes a source or drain first region and a drain or source second region which are connected by a channel. A gate structure is position on top of said channel and operates to control the channel. The gate structure is formed in a trench whose sidewalls have a shape which converges (narrows) in the width dimension towards the substrate. A capacitor is also formed having a first electrode, a second electrode and a dielectric layer between the electrodes. This capacitor is also formed in a trench. An electrode line is connected to the first electrode of the capacitor. The second electrode of the capacitor is formed in a layer shared in common with at least part of the drain or source second region of the transistor. A bit line is located beneath the gate structure. The integrated circuit may, for example, be a DRAM memory cell.Type: ApplicationFiled: July 15, 2008Publication date: May 14, 2009Applicant: STMicroelectronics (Crolles 2) SASInventors: Christian Caillat, Richard Ferrant
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Patent number: 7008842Abstract: Process for fabricating a component, such as a capacitor in an integrated circuit, and integrated component, in which process and component a first electrode is in the form of a cup; a layer made of a dielectric covers at least the wall of the first electrode; a second electrode fills the cup; a first electrical connection via lies above the second electrode; and a second electrical connection via lies laterally with respect to and at a predetermined distance from the first electrode and is connected to the first electrode.Type: GrantFiled: May 1, 2002Date of Patent: March 7, 2006Assignee: STMicroelectronics, S.A.Inventors: Pascale Mazoyer, Christian Caillat
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Publication number: 20040262638Abstract: Integrated circuit with dram memory cell Integrated circuit comprising a substrate (1), at least one capacitor (9) placed above the substrate (1) and provided with a first electrode (5), with a second electrode (8) and with a dielectric (7) placed between the two electrodes, at least one via for connection between the substrate (1) and a conductor level lying above the capacitor (9), and a dielectric covering the substrate (1) and surrounding both the capacitor (9) and the via (6).Type: ApplicationFiled: August 10, 2004Publication date: December 30, 2004Inventors: Pascale Mazoyer, Christian Caillat
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Patent number: 6562687Abstract: The invention relates to an MIS transistor comprising a channel region (118), source (114) and drain (116) regions arranged on either side of the channel, and a gate (150) set closely above the channel region. According to the invention, the channel has a doped central part (140), located between the source and drain regions, and separated from said source and drain regions.Type: GrantFiled: June 28, 2001Date of Patent: May 13, 2003Assignee: Commissariat a l'Energie AtomiqueInventors: Simon Deleonibus, Georges Guegan, Christian Caillat, Fabien Coudert
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Publication number: 20020162677Abstract: Process for fabricating a component, such as a capacitor in an integrated circuit, and integrated component, in which process and component a first electrode is in the form of a cup; a layer made of a dielectric covers at least the wall of the first electrode; a second electrode fills the cup; a first electrical connection via lies above the second electrode; and a second electrical connection via lies laterally with respect to and at a predetermined distance from the first electrode and is connected to the first electrode.Type: ApplicationFiled: May 1, 2002Publication date: November 7, 2002Applicant: STMICROELECTRONICS S.A.Inventors: Pascale Mazoyer, Christian Caillat