Patents by Inventor Christoph A. Wasshuber
Christoph A. Wasshuber 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: 8581233Abstract: The present invention provides a single-electron transistor device 100. The device comprises a source 105 and drain 110 located over a substrate 115 and a quantum island 120 situated between the source and drain, to form tunnel junctions 125, 130 between the source and drain. The device further includes a fixed-gate electrode 135 located adjacent the quantum island 120. The fixed-gate electrode has a capacitance associated therewith that varies as a function of an applied voltage to the fixed-gate electrode. The present invention also includes a method of fabricating a single-electron device 300, and a transistor circuit 800 that include a single-electron device 810.Type: GrantFiled: October 7, 2009Date of Patent: November 12, 2013Assignee: Texas Instruments IncorporatedInventor: Christoph Wasshuber
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Patent number: 7939398Abstract: A method of manufacturing a single-electron transistor device is provided. The method includes forming a thinned region in a silicon substrate, the thinned region offset by a non-selected region. The method also includes forming at least one quantum island from the thinned region by subjecting the thinned region to an annealing process. The non-selected region is aligned with the quantum island and tunnel junctions are formed between the quantum island and the non-selected region. The present invention also includes a single-electron device, and a method of manufacturing an integrated circuit that includes a single-electron device.Type: GrantFiled: November 16, 2009Date of Patent: May 10, 2011Assignee: Texas Instruments IncorporatedInventors: Christoph Wasshuber, Gabriel G. Barna, Olivier A. Faynot
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Publication number: 20100062587Abstract: A method of manufacturing a single-electron transistor device is provided. The method includes forming a thinned region in a silicon substrate, the thinned region offset by a non-selected region. The method also includes forming at least one quantum island from the thinned region by subjecting the thinned region to an annealing process. The non-selected region is aligned with the quantum island and tunnel junctions are formed between the quantum island and the non-selected region. The present invention also includes a single-electron device, and a method of manufacturing an integrated circuit that includes a single-electron device.Type: ApplicationFiled: November 16, 2009Publication date: March 11, 2010Applicant: Texas Instruments IncorporatedInventors: Christoph Wasshuber, Gabriel George Barna, Olivier Alain Faynot
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Publication number: 20100019227Abstract: The present invention provides a single-electron transistor device 100. The device comprises a source 105 and drain 110 located over a substrate 115 and a quantum island 120 situated between the source and drain, to form tunnel junctions 125, 130 between the source and drain. The device further includes a fixed-gate electrode 135 located adjacent the quantum island 120. The fixed-gate electrode has a capacitance associated therewith that varies as a function of an applied voltage to the fixed-gate electrode. The present invention also includes a method of fabricating a single-electron device 300, and a transistor circuit 800 that include a single-electron device 810.Type: ApplicationFiled: October 7, 2009Publication date: January 28, 2010Applicant: Texas Instruments IncorporatedInventor: Christoph Wasshuber
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Patent number: 7619241Abstract: The present invention provides a single-electron transistor device 100. The device comprises a source 105 and drain 110 located over a substrate 115 and a quantum island 120 situated between the source and drain, to form tunnel junctions 125, 130 between the source and drain. The device further includes a fixed-gate electrode 135 located adjacent the quantum island 120. The fixed-gate electrode has a capacitance associated therewith that varies as a function of an applied voltage to the fixed-gate electrode. The present invention also includes a method of fabricating a single-electron device 300, and a transistor circuit 800 that include a single-electron device 810.Type: GrantFiled: December 11, 2006Date of Patent: November 17, 2009Assignee: Texas Instruments IncorporatedInventor: Christoph Wasshuber
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Patent number: 7550343Abstract: In one embodiment, a semiconductor structure used in manufacturing a semiconductor device includes a substrate layer. The structure also includes first and second isolation regions formed by etching an oxide layer provided on the substrate layer to define an epitaxial growth surface of the substrate layer for epitaxial growth of a substrate material on the epitaxial growth surface between the first and second isolation regions. The structure also includes an active region that includes the epitaxially-grown substrate material between the first and second isolation regions, the active region formed by epitaxially growing the substrate material on the epitaxial growth surface of the substrate layer.Type: GrantFiled: July 10, 2006Date of Patent: June 23, 2009Assignee: Texas Instruments IncorporatedInventor: Christoph A. Wasshuber
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Publication number: 20080272442Abstract: The present invention facilitates semiconductor fabrication by providing methods of fabrication that employ high-k dielectric layers. An n-type well region (304) is formed within a semiconductor body (302). A threshold voltage adjustment implant is performed by implanting a p-type dopant into the n-type well region to form a counter doped region (307). A high-k dielectric layer (308) is formed over the device (300). A polysilicon layer (310) is formed on the high-k dielectric layer and doped n-type. The high-k dielectric layer (308) and the polysilicon layer (310) are patterned to form polysilicon gate structures. P-type source/drain regions (306) are formed within the n-type well region (304).Type: ApplicationFiled: June 12, 2008Publication date: November 6, 2008Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Ramesh Venugopal, Christoph Wasshuber, David Barry Scott
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Patent number: 7427543Abstract: The present invention provides source/drain electrode 100 for a transistor 105. The source/drain electrode 100 comprises a plurality of polysilicon grains 100 located over a source/drain region 115. A metal salicide layer 120 conformally coats the plurality of polysilicon grains. The present invention also includes a method of fabricating the above described source/drain electrode 200, and integrated circuit 800 have includes a semiconductor device 805 having the described source/drain electrodes 810.Type: GrantFiled: August 7, 2006Date of Patent: September 23, 2008Assignee: Texas Instruments IncorporatedInventors: Majid M. Mansoori, Christoph A. Wasshuber
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Patent number: 7407850Abstract: The present invention facilitates semiconductor fabrication by providing methods of fabrication that employ high-k dielectric layers. An n-type well region (304) is formed within a semiconductor body (302). A threshold voltage adjustment implant is performed by implanting a p-type dopant into the n-type well region to form a counter doped region (307). A high-k dielectric layer (308) is formed over the device (300). A polysilicon layer (310) is formed on the high-k dielectric layer and doped n-type. The high-k dielectric layer (308) and the polysilicon layer (310) are patterned to form polysilicon gate structures. P-type source/drain regions (306) are formed within the n-type well region (304).Type: GrantFiled: March 29, 2005Date of Patent: August 5, 2008Assignee: Texas Instruments IncorporatedInventors: Ramesh Venugopal, Christoph Wasshuber, David Barry Scott
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Patent number: 7339214Abstract: Methods and apparatus are disclosed for selectively inducing stress in a semiconductor device, wherein a first region of a substrate is implanted so as to induce stress in a second region. An electrical device is formed at least partially in the second region, wherein the induced stress therein may improve one or more operational characteristics of the device, such as channel region carrier mobility.Type: GrantFiled: September 7, 2004Date of Patent: March 4, 2008Assignee: Texas Instruments IncorporatedInventors: Christoph Wasshuber, Keith A. Joyner
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Patent number: 7208379Abstract: A method for multiplying the pitch of a semiconductor device is disclosed. The method includes forming a patterned mask layer on a first layer, where the patterned mask layer has a first line width. The first layer can then be etched to form a first plurality of sloped sidewalls. After removing a portion of the patterned mask so that the patterned mask layer has a second line width less than the first line width, the first layer can be etched again to form a second plurality of sloped sidewalls. The patterned mask layer can then be removed. The first layer can be etched again to form a third plurality of sloped sidewalls. The first plurality of sloped sidewalls, the second plurality of sloped sidewalls, and the third plurality of sloped sidewalls can form an array of parallel triangular channels.Type: GrantFiled: November 29, 2004Date of Patent: April 24, 2007Assignee: Texas Instruments IncorporatedInventors: Ramesh Venugopal, Christoph Wasshuber
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Publication number: 20070080340Abstract: The present invention provides a single-electron transistor device 100. The device comprises a source 105 and drain 110 located over a substrate 115 and a quantum island 120 situated between the source and drain, to form tunnel junctions 125, 130 between the source and drain. The device further includes a fixed-gate electrode 135 located adjacent the quantum island 120. The fixed-gate electrode has a capacitance associated therewith that varies as a function of an applied voltage to the fixed-gate electrode. The present invention also includes a method of fabricating a single-electron device 300, and a transistor circuit 800 that include a single-electron device 810.Type: ApplicationFiled: December 11, 2006Publication date: April 12, 2007Applicant: Texas Instruments IncorporatedInventor: Christoph Wasshuber
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Patent number: 7166858Abstract: The present invention provides a single-electron transistor device 100. The device comprises a source 105 and drain 110 located over a substrate 115 and a quantum island 120 situated between the source and drain, to form tunnel junctions 125, 130 between the source and drain. The device further includes a fixed-gate electrode 135 located adjacent the quantum island 120. The fixed-gate electrode has a capacitance associated therewith that varies as a function of an applied voltage to the fixed-gate electrode. The present invention also includes a method of fabricating a single-electron device 300, and a transistor circuit 800 that include a single-electron device 810.Type: GrantFiled: October 7, 2004Date of Patent: January 23, 2007Assignee: Texas Instruments IncorporatedInventor: Christoph Wasshuber
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Publication number: 20070007596Abstract: The present invention provides a method of manufacturing a single-electron transistor device (100). The method includes forming a thinned region (110) in a silicon substrate (105), the thinned region (110) offset by a non-selected region (115). The method also includes forming at least one quantum island (145) from the thinned region (110) by subjecting the thinned region (110) to an annealing process. The non-selected region (115) is aligned with the quantum island (145) and tunnel junctions (147) are formed between the quantum island (145) and the non-selected region (115). The present invention also includes a single-electron device (200), and a method of manufacturing an integrated circuit (300) that includes a single-electron device (305).Type: ApplicationFiled: September 8, 2006Publication date: January 11, 2007Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Christoph Wasshuber, Gabriel Barna, Olivier Faynot
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Publication number: 20060275992Abstract: The present invention provides source/drain electrode 100 for a transistor 105. The source/drain electrode 100 comprises a plurality of polysilicon grains 100 located over a source/drain region 115. A metal salicide layer 120 conformally coats the plurality of polysilicon grains. The present invention also includes a method of fabricating the above described source/drain electrode 200, and integrated circuit 800 have includes a semiconductor device 805 having the described source/drain electrodes 810.Type: ApplicationFiled: August 7, 2006Publication date: December 7, 2006Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Majid Mansoori, Christoph Wasshuber
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Publication number: 20060244097Abstract: In one embodiment, a semiconductor structure used in manufacturing a semiconductor device includes a substrate layer. The structure also includes first and second isolation regions formed by etching an oxide layer provided on the substrate layer to define an epitaxial growth surface of the substrate layer for epitaxial growth of a substrate material on the epitaxial growth surface between the first and second isolation regions. The structure also includes an active region that includes the epitaxially-grown substrate material between the first and second isolation regions, the active region formed by epitaxially growing the substrate material on the epitaxial growth surface of the substrate layer.Type: ApplicationFiled: July 10, 2006Publication date: November 2, 2006Inventor: Christoph Wasshuber
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Patent number: 7122413Abstract: The present invention provides a method of manufacturing a single-electron transistor device (100). The method includes forming a thinned region (110) in a silicon substrate (105), the thinned region (110) offset by a non-selected region (115). The method also includes forming at least one quantum island (145) from the thinned region (110) by subjecting the thinned region (110) to an annealing process. The non-selected region (115) is aligned with the quantum island (145) and tunnel junctions (147) are formed between the quantum island (145) and the non-selected region (115). The present invention also includes a single-electron device (200), and a method of manufacturing an integrated circuit (300) that includes a single-electron device (305).Type: GrantFiled: December 19, 2003Date of Patent: October 17, 2006Assignee: Texas Instruments IncorporatedInventors: Christoph Wasshuber, Gabriel George Barna, Olivier Alain Faynot
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Publication number: 20060223248Abstract: The present invention facilitates semiconductor fabrication by providing methods of fabrication that employ high-k dielectric layers. An n-type well region (304) is formed within a semiconductor body (302). A threshold voltage adjustment implant is performed by implanting a p-type dopant into the n-type well region to form a counter doped region (307). A high-k dielectric layer (308) is formed over the device (300). A polysilicon layer (310) is formed on the high-k dielectric layer and doped n-type. The high-k dielectric layer (308) and the polysilicon layer (310) are patterned to form polysilicon gate structures. P-type source/drain regions (306) are formed within the n-type well region (304).Type: ApplicationFiled: March 29, 2005Publication date: October 5, 2006Inventors: Ramesh Venugopal, Christoph Wasshuber, David Scott
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Patent number: 7109556Abstract: The present invention provides source/drain electrode 100 for a transistor 105. The source/drain electrode 100 comprises a plurality of polysilicon grains 100 located over a source/drain region 115. A metal salicide layer 120 conformally coats the plurality of polysilicon grains. The present invention also includes a method of fabricating the above described source/drain electrode 200, and integrated circuit 800 have includes a semiconductor device 805 having the described source/drain electrodes 810.Type: GrantFiled: November 16, 2004Date of Patent: September 19, 2006Assignee: Texas Instruments IncorporatedInventors: Majid M. Mansoori, Christoph Wasshuber
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Publication number: 20060113636Abstract: A method for multiplying the pitch of a semiconductor device is disclosed. The method includes forming a patterned mask layer on a first layer, where the patterned mask layer has a first line width. The first layer can then be etched to form a first plurality of sloped sidewalls. After removing a portion of the patterned mask so that the patterned mask layer has a second line width less than the first line width, the first layer can be etched again to form a second plurality of sloped sidewalls. The patterned mask layer can then be removed. The first layer can be etched again to form a third plurality of sloped sidewalls. The first plurality of sloped sidewalls, the second plurality of sloped sidewalls, and the third plurality of sloped sidewalls can form an array of parallel triangular channels.Type: ApplicationFiled: November 29, 2004Publication date: June 1, 2006Inventors: Ramesh Venugopal, Christoph Wasshuber