Patents by Inventor Timothy K. Carns
Timothy K. Carns 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: 8324069Abstract: A method of fabricating a high-performance capacitor that may be incorporated into a standard CMOS fabrication process suitable for submicron devices is described. The parameters used in the standard CMOS process may be maintained, particularly for the definition and etch of the lower electrode layer. To reduce variation in critical dimension width, an Anti-Reflective Layer (ARL) is used, such as a Plasma Enhanced chemical vapor deposition Anti-Reflective Layer (PEARL) or other Anti-Reflective Coatings (ARCS), such as a conductive film like TiN. This ARL formation occurs after the capacitor specific process steps, but prior to the masking used for defining the lower electrodes. A Rapid Thermal Oxidation (RTO) is performed subsequent to removing the unwanted capacitor dielectric layer from the transistor poly outside of the capacitor regions, but prior to the PEARL deposition.Type: GrantFiled: May 31, 2011Date of Patent: December 4, 2012Assignee: IXYS CH GmbHInventors: Timothy K. Carns, John L. Horvath, Lee J. DeBruler, Michael J. Westphal
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Patent number: 8017475Abstract: A method of fabricating a high-performance capacitor that may be incorporated into a standard CMOS fabrication process suitable for submicron devices is described. The parameters used in the standard CMOS process may be maintained, particularly for the definition and etch of the lower electrode layer. To reduce variation in critical dimension width, an Anti-Reflective Layer (ARL) is used, such as a Plasma Enhanced chemical vapor deposition Anti-Reflective Layer (PEARL) or other Anti-Reflective Coatings (ARCS), such as a conductive film like TiN. This ARL formation occurs after the capacitor specific process steps, but prior to the masking used for defining the lower electrodes. A Rapid Thermal Oxidation (RTO) is performed subsequent to removing the unwanted capacitor dielectric layer from the transistor poly outside of the capacitor regions, but prior to the PEARL deposition.Type: GrantFiled: July 20, 2010Date of Patent: September 13, 2011Assignee: IXYS CH GmbHInventors: Timothy K. Carns, John L. Horvath, Lee J. DeBruler, Michael J. Westphal
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Patent number: 7768052Abstract: A method of fabricating a high-performance capacitor that may be incorporated into a standard CMOS fabrication process suitable for submicron devices is described. The parameters used in the standard CMOS process may be maintained, particularly for the definition and etch of the lower electrode layer. To reduce variation in critical dimension width, an Anti-Reflective Layer (ARL) is used, such as a Plasma Enhanced chemical vapor deposition Anti-Reflective Layer (PEARL) or other Anti-Reflective Coatings (ARCS), such as a conductive film like TiN. This ARL formation occurs after the capacitor specific process steps, but prior to the masking used for defining the lower electrodes. A Rapid Thermal Oxidation (RTO) is performed subsequent to removing the unwanted capacitor dielectric layer from the transistor poly outside of the capacitor regions, but prior to the PEARL deposition.Type: GrantFiled: November 29, 2005Date of Patent: August 3, 2010Assignee: ZiLOG, Inc.Inventors: Timothy K. Carns, John L. Horvath, Lee J. DeBruler, Michael J. Westphal
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Patent number: 7060584Abstract: A method of fabricating a high performance capacitor that may be incorporated into a standard CMOS fabrication process suitable for submicron devices is described. The parameters used in the standard CMOS process may be maintained, particularly for the definition and etch of the lower electrode layer. To reduce variation in critical dimension width, an Anti-Reflective Layer (ARL) is used. In the preferred embodiment, this is of the Plasma Enhanced chemical vapor deposition Anti-Reflective Layer (PEARL) type, although other Anti-Reflective Coatings (ARCs) or layers, such as a conductive film like TiN may be employed. This ARL formation occurs after the capacitor specific process steps, but prior to the masking used for defining the lower electrodes. In one embodiment, a Rapid Thermal Oxidation (RTO) is performed subsequent to removing the unwanted capacitor dielectric layer from the transistor poly outside of the capacitor regions, but prior to the PEARL deposition.Type: GrantFiled: July 12, 1999Date of Patent: June 13, 2006Assignee: ZiLOG, Inc.Inventors: Timothy K. Carns, John L. Horvath, Lee J. DeBruler, Michael J. Westphal
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Patent number: 6849510Abstract: Non-oxidizing spacer densification method for producing semiconductor devices, such as MOSFET devices, and that may be implemented during semiconductor fabrication with little or substantially no polycide adhesion loss experienced during spacer densification. The method may be implemented to provide good polycide adhesion characteristics with reduced process complexity over conventional methods by eliminating the need for additional process steps such as metal silicide encapsulation or polysilicon surface treatments.Type: GrantFiled: September 22, 2003Date of Patent: February 1, 2005Assignee: ZiLOG, Inc.Inventors: Brett D. Lowe, John A. Smythe, Timothy K. Carns
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Publication number: 20040072397Abstract: Non-oxidizing spacer densification method for producing semiconductor devices, such as MOSFET devices, and that may be implemented during semiconductor fabrication with little or substantially no polycide adhesion loss experienced during spacer densification. The method may be implemented to provide good polycide adhesion characteristics with reduced process complexity over conventional methods by eliminating the need for additional process steps such as metal silicide encapsulation or polysilicon surface treatments.Type: ApplicationFiled: September 22, 2003Publication date: April 15, 2004Applicant: ZiLOG, Inc.Inventors: Brett D. Lowe, John A. Smythe, Timothy K. Carns
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Patent number: 6642112Abstract: Non-oxidizing spacer densification method for producing semiconductor devices, such as MOSFET devices, and that may be implemented during semiconductor fabrication with little or substantially no polycide adhesion loss experienced during spacer densification. The method may be implemented to provide good polycide adhesion characteristics with reduced process complexity over conventional methods by eliminating the need for additional process steps such as metal silicide encapsulation or polysilicon surface treatments.Type: GrantFiled: July 30, 2001Date of Patent: November 4, 2003Assignee: ZiLOG, Inc.Inventors: Brett D. Lowe, John A. Smythe, Timothy K. Carns
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Publication number: 20030203577Abstract: Non-oxidizing spacer densification method for producing semiconductor devices, such as MOSFET devices, and that may be implemented during semiconductor fabrication with little or substantially no polycide adhesion loss experienced during spacer densification. The method may be implemented to provide good polycide adhesion characteristics with reduced process complexity over conventional methods by eliminating the need for additional process steps such as metal silicide encapsulation or polysilicon surface treatments.Type: ApplicationFiled: July 30, 2001Publication date: October 30, 2003Inventors: Brett D. Lowe, John A. Smythe, Timothy K. Carns
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Patent number: 6323091Abstract: A method for manufacturing a semiconductor device in which ROM programming ion implantation is performed by utilizing the same mask as used for implanting dopant in MOS transistors. The ROM programming ion implantation is conducted under the same conditions as the MOS transistor forming step. Only a single mask needs to be modified for the programming, thus reducing cost and complexity of manufacturing the device.Type: GrantFiled: July 16, 1999Date of Patent: November 27, 2001Assignee: Zilog, Inc.Inventors: Sungkwon Lee, Timothy K. Carns
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Patent number: 6165846Abstract: The improvement of thin tunnel oxides used in EEPROM and FLASH tecnologies using post-oxidation annealing in nitrogen causes defects in subsequent oxide films. These are manifested by oxide thinning at the bird's beak and result in high gate leakage. As the time and temperature to the post-oxidation annealing are increased for improved tunnel oxide performance, the number of defects increases rapidly. A method of realizing the improved tunnel oxide Q.sub.BD using higher post-oxidation time and temperature annealing while at the same time not degrading the quality of subsequent gate oxides is shown. The use of sacrificial oxidation and strip just prior to the transistor gate oxidation is described. This process removes the additional nitride which exists at the field edges, leading to the oxide thinning. As a result, improved tunnel oxide integrity can be achieved without degradation of high and low voltage transistors.Type: GrantFiled: March 2, 1999Date of Patent: December 26, 2000Assignee: Zilog, Inc.Inventors: Timothy K. Carns, John A. Smythe, III, John A. Ransom, Bernice L. Kickel, John E. Berg
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Patent number: 5965931Abstract: A bipolar transistor includes multiple coupled delta layers in the base region between the emitter and collector regions to enhance carrier mobility and conductance. The delta layers can be varied in number, thickness, and dopant concentration to optimize desired device performance and enhanced mobility and conductivity vertically for emitter to collector and laterally parallel to the delta-doped layers. The transistors can be homojunction devices or heterojunction devices formed in either silicon or III-V semiconductor material.Type: GrantFiled: September 15, 1994Date of Patent: October 12, 1999Assignee: The Board of Regents of the University of CaliforniaInventors: Kang L. Wang, Timothy K. Carns, Xinyu Zheng
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Patent number: 5684737Abstract: A static random access memory (SRAM) cell includes a bistable diode and a load device serially connectable between two voltage potentials (VDD, Ground) with a gate device (field effect transistor) connected between a bit line and a common terminal of the bistable diode and load device and a control terminal of the gate device connected to a word line. The bistable diode includes a GeSi structure between a p-doped semiconductor region and a spaced n-doped semiconductor region. The GeSi structure can be a GeSi/Si superlattice and a .delta.-doped tunnel junction, a Ge.sub.x Si.sub.1-x multiple well structure, or a .delta.-doped tunnel junction.Type: GrantFiled: December 8, 1995Date of Patent: November 4, 1997Assignee: The Regents of the University of CaliforniaInventors: Kang L. Wang, Xinyu Zheng, Timothy K. Carns