Patents by Inventor David L. Heald
David L. Heald 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: 8143703Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices).Type: GrantFiled: November 5, 2008Date of Patent: March 27, 2012Assignee: Nanosys, Inc.Inventors: David L. Heald, Karen Chu Cruden, Xiangfeng Duan, Chao Liu, J. Wallace Parce
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Patent number: 8068268Abstract: Disclosed is a microelectromechanical system (MEMS) device and method of manufacturing the same. In one aspect, MEMS such as an interferometric modulator include one or more elongated interior posts and support rails supporting a deformable reflective layer, where the elongated interior posts are entirely within an interferometric cavity and aligned parallel with the support rails. In another aspect, the interferometric modulator includes one or more elongated etch release holes formed in the deformable reflective layer and aligned parallel with channels formed in the deformable reflective layer defining parallel strips of the deformable reflective layer.Type: GrantFiled: July 3, 2007Date of Patent: November 29, 2011Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: David L Heald, Fan Zhong, Philip Don Floyd
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Publication number: 20100155786Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, formation of arrays in spin-on-dielectrics, solvent annealing after nanostructure deposition, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices). Methods for protecting nanostructures from fusion during high temperature processing are also provided.Type: ApplicationFiled: July 27, 2007Publication date: June 24, 2010Applicant: NANOSYS, Inc.Inventors: David L. Heald, Jian Chen, Karen Chu Cruden, Xiangfeng Duan, Chao Liu, Madhuri L. Nallabolu, J. Wallace Parce, Srikanth Ranganathan
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Patent number: 7595528Abstract: Methods and apparatuses for nanoenabled memory devices and anisotropic charge carrying arrays are described. In an aspect, a memory device includes a substrate, a source region of the substrate, and a drain region of the substrate. A population of nanoelements is deposited on the substrate above a channel region, the population of nanolements in one embodiment including metal quantum dots. A tunnel dielectric layer is formed on the substrate overlying the channel region, and a metal migration barrier layer is deposited over the dielectric layer. A gate contact is formed over the thin film of nanoelements. The nanoelements allow for reduced lateral charge transfer. The memory device may be a single or multistate memory device.Type: GrantFiled: December 21, 2004Date of Patent: September 29, 2009Assignee: Nanosys, Inc.Inventors: Xiangfeng Duan, Calvin Y. H. Chow, David L. Heald, Chunming Niu, J. Wallace Parce, David P. Stumbo
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Publication number: 20090065764Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices).Type: ApplicationFiled: November 5, 2008Publication date: March 12, 2009Applicant: NANOSYS, Inc.Inventors: David L. Heald, Karen Chu Cruden, Xiangfeng Duan, Chao Liu, J. Wallace Parce
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Patent number: 7501315Abstract: Methods for forming or patterning nanostructure arrays are provided. The methods involve formation of arrays on coatings comprising nanostructure association groups, patterning using resist, and/or use of devices that facilitate array formation. Related devices for forming nanostructure arrays are also provided, as are devices including nanostructure arrays (e.g., memory devices).Type: GrantFiled: June 7, 2005Date of Patent: March 10, 2009Assignee: Nanosys, Inc.Inventors: David L. Heald, Karen Chu Cruden, Xiangfeng Duan, Chao Liu, J. Wallace Parce
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Publication number: 20090009444Abstract: Disclosed is a microelectromechanical system (MEMS) device and method of manufacturing the same. In one aspect, MEMS such as an interferometric modulator include one or more elongated interior posts and support rails supporting a deformable reflective layer, where the elongated interior posts are entirely within an interferometric cavity and aligned parallel with the support rails. In another aspect, the interferometric modulator includes one or more elongated etch release holes formed in the deformable reflective layer and aligned parallel with channels formed in the deformable reflective layer defining parallel strips of the deformable reflective layer.Type: ApplicationFiled: July 3, 2007Publication date: January 8, 2009Applicant: Qualcomm IncorporatedInventors: David L. Heald, Fan Zhong, Philip Don Floyd
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Patent number: 7382017Abstract: Methods and apparatuses for nanoenabled memory devices and anisotropic charge carrying arrays are described. In an aspect, a memory device includes a substrate, a source region of the substrate, and a drain region of the substrate. A population of nanoelements is deposited on the substrate above a channel region, the population of nanolements in one embodiment including metal quantum dots. A tunnel dielectric layer is formed on the substrate overlying the channel region, and a metal migration barrier layer is deposited over the dielectric layer. A gate contact is formed over the thin film of nanoelements. The nanoelements allow for reduced lateral charge transfer. The memory device may be a single or multistate memory device.Type: GrantFiled: April 3, 2007Date of Patent: June 3, 2008Assignee: Nanosys, IncInventors: Xiangfeng Duan, Calvin Y. H. Cho, David L. Heald, Chunming Niu, J. Wallace Parce, David P. Stumbo
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Patent number: 7339184Abstract: The present invention is directed to methods to harvest, integrate and exploit nanomaterials, and particularly elongated nanowire materials. The invention provides methods for harvesting nanowires that include selectively etching a sacrificial layer placed on a nanowire growth substrate to remove nanowires. The invention also provides methods for integrating nanowires into electronic devices that include placing an outer surface of a cylinder in contact with a fluid suspension of nanowires and rolling the nanowire coated cylinder to deposit nanowires onto a surface. Methods are also provided to deposit nanowires using an ink-jet printer or an aperture to align nanowires. Additional aspects of the invention provide methods for preventing gate shorts in nanowire based transistors. Additional methods for harvesting and integrating nanowires are provided.Type: GrantFiled: April 29, 2005Date of Patent: March 4, 2008Assignee: Nanosys, IncInventors: Linda T. Romano, Jian Chen, Xiangfeng Duan, Robert S. Dubrow, Stephen A. Empedocles, Jay L. Goldman, James M. Hamilton, David L. Heald, Francesco Lemmi, Chunming Niu, Yaoling Pan, George Pontis, Vijendra Sahi, Erik C. Scher, David P. Stumbo, Jeffery A. Whiteford
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Patent number: 4482909Abstract: In the operation of a high density quadrilinear CCD imaging array, photogenerate charge is transferred from the photosites, transversely through one inner CCD register to a second outer CCD register, before clocking the CCD registers. During the transfer from the inner to the outer registers, the signal charge passes through a region defined by boundaries spaced relatively widely to a region in which the boundaries are required to be spaced closely. In the latter region, two dimensional fringing fields from the boundaries elevate the minimum potential which defines the signal charge path and creates a potential step which traps a significant percentage of the signal charge. This trapping creates a large offset between the output signals from the inner and outer register. The concept proposed is to use a fat zero, i.e., an intentionally introduced small packet of charge, injected into the input of both the inner and outer CCD registers in order to totally eliminate the offset.Type: GrantFiled: August 2, 1982Date of Patent: November 13, 1984Assignee: Xerox CorporationInventor: David L. Heald
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Patent number: 4173765Abstract: A solid state image sensing device comprises an array of picture sensing elements which are MOS transistors formed on a bulk of semiconductor material. The transistors are of a V-MOS configuration and have respective sources, V-shaped gates, and drains. The source-to-bulk diode of a V-MOS picture sensing element functions as a photodiode and is disposed near the surface of the array to receive a respective portion of imagewise illumination. In a preferred embodiment, the drain of the V-MOS picture sensing element is buried in the bulk directly beneath its respective source. The source, in conjunction with its gate, acts as a multiplex switch for the photodiode.Type: GrantFiled: May 26, 1978Date of Patent: November 6, 1979Assignee: Eastman Kodak CompanyInventors: David L. Heald, Teh-Hsuang Lee, Rajinder P. Khosla