Patents by Inventor Ethan Williford
Ethan Williford 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: 10032903Abstract: A threshold voltage adjusted long-channel transistor fabricated according to short-channel transistor processes is described. The threshold-adjusted transistor includes a substrate with spaced-apart source and drain regions formed in the substrate and a channel region defined between the source and drain regions. A layer of gate oxide is formed over at least a part of the channel region with a gate formed over the gate oxide. The gate further includes at least one implant aperture formed therein with the channel region of the substrate further including an implanted region within the channel between the source and drain regions. Methods for forming the threshold voltage adjusted transistor are also disclosed.Type: GrantFiled: August 17, 2015Date of Patent: July 24, 2018Assignee: Micron Technology, Inc.Inventor: Ethan Williford
-
Publication number: 20150357465Abstract: A threshold voltage adjusted long-channel transistor fabricated according to short-channel transistor processes is described. The threshold-adjusted transistor includes a substrate with spaced-apart source and drain regions formed in the substrate and a channel region defined between the source and drain regions. A layer of gate oxide is formed over at least a part of the channel region with a gate formed over the gate oxide. The gate further includes at least one implant aperture formed therein with the channel region of the substrate further including an implanted region within the channel between the source and drain regions. Methods for forming the threshold voltage adjusted transistor are also disclosed.Type: ApplicationFiled: August 17, 2015Publication date: December 10, 2015Inventor: Ethan Williford
-
Patent number: 9111958Abstract: A threshold voltage adjusted long-channel transistor fabricated according to short-channel transistor processes is described. The threshold-adjusted transistor includes a substrate with spaced-apart source and drain regions formed in the substrate and a channel region defined between the source and drain regions. A layer of gate oxide is formed over at least a part of the channel region with a gate formed over the gate oxide. The gate further includes at least one implant aperture formed therein with the channel region of the substrate further including an implanted region within the channel between the source and drain regions. Methods for forming the threshold voltage adjusted transistor are also disclosed.Type: GrantFiled: June 7, 2011Date of Patent: August 18, 2015Assignee: MICRON TECHNOLOGY, INC.Inventor: Ethan Williford
-
Publication number: 20110233671Abstract: A threshold voltage adjusted long-channel transistor fabricated according to short-channel transistor processes is described. The threshold-adjusted transistor includes a substrate with spaced-apart source and drain regions formed in the substrate and a channel region defined between the source and drain regions. A layer of gate oxide is formed over at least a part of the channel region with a gate formed over the gate oxide. The gate further includes at least one implant aperture formed therein with the channel region of the substrate further including an implanted region within the channel between the source and drain regions. Methods for forming the threshold voltage adjusted transistor are also disclosed.Type: ApplicationFiled: June 7, 2011Publication date: September 29, 2011Applicant: MICRON TECHNOLOGY, INC.Inventor: Ethan Williford
-
Patent number: 7968411Abstract: A threshold voltage adjusted long-channel transistor fabricated according to short-channel transistor processes is described. The threshold-adjusted transistor includes a substrate with spaced-apart source and drain regions formed in the substrate and a channel region defined between the source and drain regions. A layer of gate oxide is formed over at least a part of the channel region with a gate formed over the gate oxide. The gate further includes at least one implant aperture formed therein with the channel region of the substrate further including an implanted region within the channel between the source and drain regions. Methods for forming the threshold voltage adjusted transistor are also disclosed.Type: GrantFiled: October 31, 2007Date of Patent: June 28, 2011Assignee: Micron Technology, Inc.Inventor: Ethan Williford
-
Patent number: 7746720Abstract: Techniques for reducing gate induced drain leakage (GIDL) in memory devices utilizing negative wordline architectures. More specifically, a method and apparatus are provided to determine whether any of the word lines in a section of a memory array are active. If any one of the plurality of word lines is active, each of the inactive word lines in the section are coupled to a negative voltage level. If none of the plurality of word lines is active, each of the plurality of word lines is coupled to ground to reduce GIDL.Type: GrantFiled: July 17, 2007Date of Patent: June 29, 2010Assignee: Micron Technology, Inc.Inventors: Scott J. Derner, Venkatraghavan Bringivijayaraghavan, Abhay S. Dixit, Scot M. Graham, Stephen R. Porter, Ethan A. Williford
-
Patent number: 7551509Abstract: A resistive memory device requires a power supply having a reduced number of voltage taps and reduced power consumption. In accordance with one exemplary embodiment, one or more voltages used by a reference circuit which are normally supplied by different taps of a power supply are generated by corresponding power circuits. In accordance with a second exemplary embodiment, the power circuits are coupled to the bit lines and replace the reference circuit in a manner to improve sensing margin.Type: GrantFiled: March 19, 2008Date of Patent: June 23, 2009Assignee: Micron Technology, Inc.Inventors: Trevor Hardy, Steve Porter, Ethan Williford, Mark Ingram
-
Patent number: 7422948Abstract: A threshold voltage adjusted long-channel transistor fabricated according to short-channel transistor processes is described. The threshold-adjusted transistor includes a substrate with spaced-apart source and drain regions formed in the substrate and a channel region defined between the source and drain regions. A layer of gate oxide is formed over at least a part of the channel region with a gate formed over the gate oxide. The gate further includes at least one implant aperture formed therein with the channel region of the substrate further including an implanted region within the channel between the source and drain regions. Methods for forming the threshold voltage adjusted transistor are also disclosed.Type: GrantFiled: March 16, 2005Date of Patent: September 9, 2008Assignee: Micron Technology, Inc.Inventor: Ethan Williford
-
Publication number: 20080170453Abstract: A resistive memory device requires a power supply having a reduced number of voltage taps and reduced power consumption. In accordance with one exemplary embodiment, one or more voltages used by a reference circuit which are normally supplied by different taps of a power supply are generated by corresponding power circuits. In accordance with a second exemplary embodiment, the power circuits are coupled to the bit lines and replace the reference circuit in a manner to improve sensing margin.Type: ApplicationFiled: March 19, 2008Publication date: July 17, 2008Inventors: Trevor Hardy, Steve Porter, Ethan Williford, Mark Ingram
-
Patent number: 7366045Abstract: A resistive memory device requires a power supply having a reduced number of voltage taps and reduced power consumption. In accordance with one exemplary embodiment, one or more voltages used by a reference circuit which are normally supplied by different taps of a power supply are generated by corresponding power circuits. In accordance with a second exemplary embodiment, the power circuits are coupled to the bit lines and replace the reference circuit in a manner to improve sensing margin.Type: GrantFiled: December 22, 2006Date of Patent: April 29, 2008Assignee: Micron Technology, Inc.Inventors: Trevor Hardy, Steve Porter, Ethan Williford, Mark Ingram
-
Publication number: 20080054375Abstract: A threshold voltage adjusted long-channel transistor fabricated according to short-channel transistor processes is described. The threshold-adjusted transistor includes a substrate with spaced-apart source and drain regions formed in the substrate and a channel region defined between the source and drain regions. A layer of gate oxide is formed over at least a part of the channel region with a gate formed over the gate oxide. The gate further includes at least one implant aperture formed therein with the channel region of the substrate further including an implanted region within the channel between the source and drain regions. Methods for forming the threshold voltage adjusted transistor are also disclosed.Type: ApplicationFiled: October 31, 2007Publication date: March 6, 2008Applicant: MICRON TECHNOLOGY, INC.Inventor: Ethan Williford
-
Patent number: 7336522Abstract: A method and apparatus is provided for reducing the current in a memory device. Peripheral device control signals are translated to the wordline off voltage level, such as a negative wordline voltage. The translated signals prevent the peripheral devices from conducting current in the wordline off mode, even if a wordline-to-digitline short should occur. The control signals may include a column select signal for a column select device and an active pull-up signal for a sense amplifier, among others. Additionally, an equalization circuit having high and low resistance components is provided for the memory device. The equalization circuit limits current, even if a wordline-to-digitline short occurs.Type: GrantFiled: July 19, 2006Date of Patent: February 26, 2008Assignee: Micron Technology, Inc.Inventors: Scott J. Derner, Stephen R. Porter, Scot M. Graham, Ethan A. Williford, Kevin G. Duesman
-
Publication number: 20070263470Abstract: Techniques for reducing gate induced drain leakage (GIDL) in memory devices utilizing negative wordline architectures. More specifically, a method and apparatus are provided to determine whether any of the word lines in a section of a memory array are active. If any one of the plurality of word lines is active, each of the inactive word lines in the section are coupled to a negative voltage level. If none of the plurality of word lines is active, each of the plurality of word lines is coupled to ground to reduce GIDL.Type: ApplicationFiled: July 17, 2007Publication date: November 15, 2007Inventors: Scott Derner, Venkatraghavan Bringivijayaraghavan, Abhay Dixit, Scot Graham, Stephen Porter, Ethan Williford
-
Patent number: 7274076Abstract: A threshold voltage adjusted long-channel transistor fabricated according to short-channel transistor processes is described. The threshold-adjusted transistor includes a substrate with spaced-apart source and drain regions formed in the substrate and a channel region defined between the source and drain regions. A layer of gate oxide is formed over at least a part of the channel region with a gate formed over the gate oxide. The gate further includes at least one implant aperture formed therein with the channel region of the substrate further including an implanted region within the channel between the source and drain regions. Methods for forming the threshold voltage adjusted transistor are also disclosed.Type: GrantFiled: October 20, 2003Date of Patent: September 25, 2007Assignee: Micron Technology, Inc.Inventor: Ethan Williford
-
Patent number: 7269079Abstract: A resistive memory device requires a power supply having a reduced number of voltage taps and reduced power consumption. In accordance with one exemplary embodiment, one or more voltages used by a reference circuit which are normally supplied by different taps of a power supply are generated by corresponding power circuits. In accordance with a second exemplary embodiment, the power circuits are coupled to the bit lines and replace the reference circuit in a manner to improve sensing margin.Type: GrantFiled: May 16, 2005Date of Patent: September 11, 2007Assignee: Micron Technology, Inc.Inventors: Trevor Hardy, Steve Porter, Ethan Williford, Mark Ingram
-
Patent number: 7245548Abstract: Techniques for reducing gate induced drain leakage (GIDL) in memory devices utilizing negative wordline architectures. More specifically, a method and apparatus are provided to determine whether any of the word lines in a section of a memory array are active. If any one of the plurality of word lines is active, each of the inactive word lines in the section are coupled to a negative voltage level. If none of the plurality of word lines is active, each of the plurality of word lines is coupled to ground to reduce GIDL.Type: GrantFiled: July 27, 2004Date of Patent: July 17, 2007Assignee: Micron Technology, Inc.Inventors: Scott J. Derner, Venkatraghavan Bringivijayaraghavan, Abhay S. Dixit, Scot M. Graham, Stephen R. Porter, Ethan A. Williford
-
Publication number: 20070104010Abstract: A resistive memory device requires a power supply having a reduced number of voltage taps and reduced power consumption. In accordance with one exemplary embodiment, one or more voltages used by a reference circuit which are normally supplied by different taps of a power supply are generated by corresponding power circuits. In accordance with a second exemplary embodiment, the power circuits are coupled to the bit lines and replace the reference circuit in a manner to improve sensing margin.Type: ApplicationFiled: December 22, 2006Publication date: May 10, 2007Inventors: Trevor Hardy, Steve Porter, Ethan Williford, Mark Ingram
-
Patent number: 7190608Abstract: A resistance variable memory device such as e.g., a PCRAM memory device, with either a 4T (transistor) or 2T memory cell configuration and either a dual cell plate or word line configuration. The device includes additional circuitry configured to write or erase addressed cells while keeping the voltage across non-addressed cells at approximately 0V. The device also includes circuitry that reads the addressed cells in a manner that increases the sensing window without causing the potential across the cell to be greater than approximately 200 mV. The device may also sense the state of its addressed cells closer in time to when the cells are accessed, in comparison to typical sensing techniques.Type: GrantFiled: June 23, 2006Date of Patent: March 13, 2007Assignee: Micron Technology, Inc.Inventors: Ethan Williford, Mark Ingram
-
Publication number: 20060285381Abstract: A resistance variable memory device such as e.g., a PCRAM memory device, with either a 4T (transistor) or 2T memory cell configuration and either a dual cell plate or word line configuration. The device includes additional circuitry configured to write or erase addressed cells while keeping the voltage across non-addressed cells at approximately 0V. The device also includes circuitry that reads the addressed cells in a manner that increases the sensing window without causing the potential across the cell to be greater than approximately 200 mV. The device may also sense the state of its addressed cells closer in time to when the cells are accessed, in comparison to typical sensing techniques.Type: ApplicationFiled: June 23, 2006Publication date: December 21, 2006Inventors: Ethan Williford, Mark Ingram
-
Patent number: 7151688Abstract: A resistance variable memory device such as e.g., a PCRAM memory device, with either a 4T (transistor) or 2T memory cell configuration and either a dual cell plate or word line configuration. The device includes additional circuitry configured to write or erase addressed cells while keeping the voltage across non-addressed cells at approximately 0V. The device also includes circuitry that reads the addressed cells in a manner that increases the sensing window without causing the potential across the cell to be greater than approximately 200 mV. The device may also sense the state of its addressed cells closer in time to when the cells are accessed, in comparison to typical sensing techniques.Type: GrantFiled: September 1, 2004Date of Patent: December 19, 2006Assignee: Micron Technology, Inc.Inventors: Ethan Williford, Mark Ingram