Patents by Inventor Richard L. Guldi

Richard L. Guldi 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: 8273523
    Abstract: In accordance with the invention, there are semiconductor devices and methods of making semiconductor devices and holes. The method of making a semiconductor device can comprise forming a photoresist layer over a surface of a wafer, wherein the wafer comprises an edge that has a substantially rounded profile, an array of dies, and at least one edge die. The method can also comprise dividing a shot area into a plurality of shot portions and assigning a blind ID to each of the plurality of shot portions. The method can further comprise identifying one or more edge shot portions on the edge of the wafer for additional exposure; and exposing one or more times identified one or more edge shot portions on the edge of the wafer and blocking non-identified one or more non-edge shot portions.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: September 25, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Shangting Detweiler, Basab Chatterjee, Chris D. Atkinson, Richard L. Guldi
  • Patent number: 8273645
    Abstract: A method of forming fully silicided (FUSI) gates in MOS transistors which is compatible with wet etch processes used in source/drain silicide formation is disclosed. The gate silicide formation step produces a top layer of metal rich silicide which is resistant to removal in wet etch processes. A blocking layer over active areas prevents source/drain silicide formation during gate silicide formation. Wet etches during removal of the blocking layer and source/drain metal strip do not remove the metal rich gate silicide layer. Anneal of the gate silicide to produce a FUSI gate with a desired stoichiometry is delayed until after formation of the source/drain silicide. The disclosed method is compatible with nickel and nickel-platinum silicide processes.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: September 25, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Mark Robert Visokay, Freidoon Mehrad, Richard L. Guldi, Yaw Samuel Obeng
  • Publication number: 20110097884
    Abstract: A method of forming fully silicided (FUSI) gates in MOS transistors which is compatible with wet etch processes used in source/drain silicide formation is disclosed. The gate silicide formation step produces a top layer of metal rich silicide which is resistant to removal in wet etch processes. A blocking layer over active areas prevents source/drain silicide formation during gate silicide formation. Wet etches during removal of the blocking layer and source/drain metal strip do not remove the metal rich gate silicide layer. Anneal of the gate silicide to produce a FUSI gate with a desired stoichiometry is delayed until after formation of the source/drain silicide. The disclosed method is compatible with nickel and nickel-platinum silicide processes.
    Type: Application
    Filed: August 7, 2009
    Publication date: April 28, 2011
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Mark Robert VISOKAY, Freidoon MEHRAD, Richard L. GULDI, Yaw Samuel OBENG
  • Patent number: 7897410
    Abstract: Reducing chemical contaminants is increasingly important for maintaining competitive production costs during fabrication of electronic devices. There is currently no production floor capability for mapping chemical contaminants across an electronic device substrate on a routine basis. A scanning surface chemical analyzer for mapping the distributions of a variety of chemicals on substrates is disclosed. The analyzer includes an array of sensors, each of which detects a single chemical or narrow range of chemicals, a scanning mechanism to provide a mapping capability, an electrical signal analyzer to collect and analyze signals from the array of sensors and generate reports of chemical distributions, and an optical desorption mechanism to amplify detection. A preferred embodiment includes an array of miniature quadrupole mass spectrometers in the sensor array. Scanning modes include whole substrate mapping, region sampling, and spot sampling of known defect sites.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: March 1, 2011
    Assignee: Texas Instruments Incorporated
    Inventors: Sean M. Collins, Jeffrey W. Ritchison, Richard L. Guldi, Kelly J. Taylor
  • Patent number: 7772867
    Abstract: A method for detecting defects during semiconductor device processing can include providing a substrate having a semiconductor comprising layer with electrically isolated application and test circuits are formed thereon, directing an electron current inducing beam to the test circuit; measuring a current between the first and the second contact pads in the test circuit; determining an electron beam induced current (EBIC); and identifying one or more defect locations in the test circuit based on the EBIC and a location of the electron beam corresponding to the EBIC. A test circuit can include a plurality of semiconductor devices connected in parallel, a first contact pad coupled to a first terminal of the semiconductor devices, and at least a second contact pad coupled to a substrate terminal associated with the semiconductor devices.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: August 10, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Richard L. Guldi, Toan Tran, Deepak A. Ramappa
  • Patent number: 7601629
    Abstract: The invention provides a method of fabricating a semiconductive device [200]. In this embodiment, the method comprises depositing a hydrocarbon layer [294] over a semiconductive substrate, forming an interconnect structure [295, 297] within the hydrocarbon layer [294], and removing the hydrocarbon layer [294] by sublimation.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: October 13, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Deepak A. Ramappa, Richard L. Guldi, Asad Haider, Frank Poag
  • Patent number: 7598507
    Abstract: The present invention provides, in one embodiment, a method (100) of manufacturing a semiconductor device. A conventionally formed reticle is positioned over a resist located on a substrate (110). A radiation path through the reticle and a window assembly located between a radiation source and resist (120), is considered. It is determined whether or not the radiation would expose a predefined blocking area of the resist within the exposure zone (130). If the radiation would expose a blocking area, then the window assembly is configured to prevent radiation from exposing the blocking area in the exposure zone (140). Other embodiments include a window assembly (300) and system (400) to facilitate manufacturing of the semiconductor device according to the method (100).
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: October 6, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Basab Chatterjee, Richard L. Guldi, Keith W. Melcher
  • Patent number: 7596456
    Abstract: A system and methods for the evaluation of the integrity of a wafer cassette and the disposition thereof are based upon evaluation of wafer measurement data obtained using a wafer sorter cassette mapping system utilized in-line during wafer sorting operations. In one embodiment, wafers are placed into slots in the wafer cassette. A wafer sorter cassette mapping sensor is scanned over the wafers in the wafer cassette. The positions of the wafers are measured while scanning the sensor over the wafers. The wafer position measurements are evaluated using a modeling system to determine slot positions, and a determination of the integrity of the cassette is generated. If the integrity determination indicates that the cassette is deformed beyond a predetermined value, the cassette is replaced. The measurement data may be stored in a data base for further trend analysis or for replacement forecasting.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: September 29, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Kelly C. Mollenkopf, Chris D. Atkinson, Richard L. Guldi
  • Publication number: 20090212793
    Abstract: A method for detecting defects during semiconductor device processing can include providing a substrate having a semiconductor comprising layer with electrically isolated application and test circuits are formed thereon, directing an electron current inducing beam to the test circuit; measuring a current between the first and the second contact pads in the test circuit; determining an electron beam induced current (EBIC); and identifying one or more defect locations in the test circuit based on the EBIC and a location of the electron beam corresponding to the EBIC. A test circuit can include a plurality of semiconductor devices connected in parallel, a first contact pad coupled to a first terminal of the semiconductor devices, and at least a second contact pad coupled to a substrate terminal associated with the semiconductor devices.
    Type: Application
    Filed: February 26, 2008
    Publication date: August 27, 2009
    Inventors: Richard L. Guldi, Toan Tran, Deepak A. Ramappa
  • Publication number: 20090166564
    Abstract: Methods are presented to monitor the performance of an ion implanter such as the E500. Ion implantation typically involves physical processes performed on a wafer such as rotation, tilt, and twist. These methods generate particulate contaminants (PCs) that affect the kill rate of the semiconductor devices on the wafer. Variations in tilt angle also compromise dose accuracy. Presently, methods for testing for PCs and implant dose accuracy do not simulate actual manufacturing conditions. This invention discloses methods to test PC buildup using multiple wafers that are subjected to rotation, twist, tilt, and combinations thereof. Additionally, methods to test dose accuracy are presented, involving implanting a monitor wafer at an angle where the crystalline channel is aligned with the ion beam. Measuring sheet resistance as a function of tilt angle at this point ensures accurate tilt-angle calibration of the ion implanter.
    Type: Application
    Filed: December 31, 2007
    Publication date: July 2, 2009
    Inventors: BENJAMIN G. MOSER, John E. Wiggins, Jeffrey G. Loewecke, Alan L. Kordick, Richard L. Guldi
  • Publication number: 20090153856
    Abstract: Reducing chemical contaminants is increasingly important for maintaining competitive production costs during fabrication of electronic devices. There is currently no production floor capability for mapping chemical contaminants across an electronic device substrate on a routine basis. A scanning surface chemical analyzer for mapping the distributions of a variety of chemicals on substrates is disclosed. The analyzer includes an array of sensors, each of which detects a single chemical or narrow range of chemicals, a scanning mechanism to provide a mapping capability, an electrical signal analyzer to collect and analyze signals from the array of sensors and generate reports of chemical distributions, and an optical desorption mechanism to amplify detection. A preferred embodiment includes an array of miniature quadrupole mass spectrometers in the sensor array. Scanning modes include whole substrate mapping, region sampling, and spot sampling of known defect sites.
    Type: Application
    Filed: December 18, 2007
    Publication date: June 18, 2009
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Sean M. Collins, Jeffrey W. Ritchison, Richard L. Guldi, Kelly J. Taylor
  • Publication number: 20090102501
    Abstract: In accordance with the invention, there are electron beam inspection systems, electron beam testable semiconductor test structures, and methods for detecting systematic defects, such as, for example contact-to-gate shorts, worm hole leakage paths, holes printing issues, and anomalies in sparse holes and random defects, such as, current leakage paths due to dislocations and pipes during semiconductor processing.
    Type: Application
    Filed: October 19, 2007
    Publication date: April 23, 2009
    Inventors: Richard L. Guldi, Toan Tran, Deepak Ramappa, Steven A. Lytle
  • Publication number: 20090087938
    Abstract: Current manufacturing of miniature or micro electronic mechanical optical chemical or biophysical devices utilizes discrete substrates holding one or more said devices. The use of discrete substrates entails several disadvantages with respect to economical manufacturing. This invention is a method of manufacturing devices using flexible carrier sheets with device substrates attached to the carrier sheet, storage/transport devices for the carrier sheet, and process tools capable of continuous processing of the carrier sheets.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Deepak A. Ramappa, Richard L. Guldi
  • Publication number: 20080176345
    Abstract: Gate dielectric punch through and/or incomplete silicidation or metallization events that may occur during transistor formation are identified. The events are identified just after gate electrodes are formed in order to characterize the degree of faulty transistors for process control purposes and to scrap product if sufficiently defective so that subsequent resources are not unnecessarily expended. An electron beam or ebeam is directed at locations of a workpiece whereon on or more transistors are formed. Electrons that are resultantly emitted from these locations are detected and used to develop respective gray level values (GLV's). Gate dielectric punch through and/or incomplete silicidation or metallization events are identified by finding high or low GLV's relative to neighboring areas.
    Type: Application
    Filed: January 19, 2007
    Publication date: July 24, 2008
    Inventors: Shaofeng Yu, Richard L. Guldi, Jiong-Ping Lu, Freidoon Mehrad, Jae Hyun Park
  • Publication number: 20080160779
    Abstract: In accordance with the invention, there are semiconductor devices and methods of making semiconductor devices and holes. The method of making a semiconductor device can comprise forming a photoresist layer over a surface of a wafer, wherein the wafer comprises an edge that has a substantially rounded profile, an array of dies, and at least one edge die. The method can also comprise dividing a shot area into a plurality of shot portions and assigning a blind ID to each of the plurality of shot portions. The method can further comprise identifying one or more edge shot portions on the edge of the wafer for additional exposure; and exposing one or more times identified one or more edge shot portions on the edge of the wafer and blocking non-identified one or more non-edge shot portions.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Inventors: Shangting Detweiler, Basab Chatterjee, Chris D. Atkinson, Richard L. Guldi
  • Patent number: 7374866
    Abstract: According to one embodiment of the present invention, a method of forming a semiconductor device includes forming a photoresist layer on a surface of a wafer. The wafer includes an array of die that includes a plurality of complete die and at least one partial edge die. The wafer has an edge that has a substantially rounded profile causing undersized patterns in semiconductor devices formed on partial edge die. A first exposure intensity is assigned to a first group of die on the surface of the wafer. The first group of die includes a group of complete die, and the first exposure intensity is assigned based at least in part on the location of the first group of die on the surface of the wafer. A second exposure intensity is assigned to a second group of die on the surface of the wafer. The second group of die includes at least one partial edge die. The second exposure intensity less than the first exposure intensity to compensate for reduced line width due to the wafer edge topography.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: May 20, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Chris D. Atkinson, Richard L. Guldi, Shangting Detweiler
  • Publication number: 20080056557
    Abstract: A system operable to detect a light beam generated by a light source includes a substrate that comprises a wafer operable to be inspected by a wafer inspection tool or exposed by an exposure tool. One or more image sensors are disposed outwardly from the substrate. An image sensor of the one or more image sensors is operable to detect a light beam and generate a sensor signal representing the detected light beam.
    Type: Application
    Filed: August 31, 2006
    Publication date: March 6, 2008
    Inventors: J.E. Patrick Gagnon, Chris Dale Atkinson, Richard L. Guldi
  • Publication number: 20070288961
    Abstract: Methods and apparatus determine program content attribute(s) of channels or programs received by an audio/video receiver. Program content attributes are determined by extracting attribute tagging data transmitted on a channel, by looking up previously stored attributes for a channel in a program content attribute table, and/or by identifying content through automatic data processing of the received channel signals themselves. Attributes may include, for example, national language, conversation vs. music, type of conversation (sports, call-in talk show) or music (classical, jazz, rock 'n roll), etc. The determined program content attributes are compared with program content attribute preferences specified for one or more users to develop matches for channel listening/viewing selection. Manual or automatic user identification may be implemented, along with storage of individual program content attribute preferences of different users.
    Type: Application
    Filed: June 12, 2006
    Publication date: December 13, 2007
    Inventors: RICHARD L. GULDI, Frank Dennis Poag
  • Patent number: 7228193
    Abstract: Semiconductor devices formed on wafers are inspected using a master wafer. A subject wafer of a semiconductor design is provided. The subject wafer has dies wherein semiconductor devices of the semiconductor design are formed and at a stage of fabrication. A current layer of the subject wafer is scanned to obtain a scanned layer/image. A master wafer comprising individual wafer/layer maps is obtained. The scanned layer is compared with a corresponding layer map. Matching and non-matching defects are identified from repetitive defects within the corresponding layer map and defects within the scanned layer. The matching defects are reviewed to classify and or identify causality. The master wafer is then updated.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: June 5, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Richard L. Guldi, Jae H. Park, Deepak A. Ramappa
  • Patent number: 7212607
    Abstract: An x-ray confocal defect detection system comprises an x-ray source, a confocal component, and defect detectors and operates on a target portion of a semiconductor device. The x-ray source generates x-ray energy. The semiconductor device includes a plurality of formed layers. The target portion is a selected layer or portion of the plurality of formed layers. At least a portion of the x-ray is transmitted through the semiconductor device as transmitted x-ray. The confocal component receives the transmitted x-ray and passes target x-ray intensity from the target portion of the transmitted x-ray energy. Detectors receive the target x-ray from the confocal component from which defect analysis can be performed.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: May 1, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Satyavolu Srinivas Papa Rao, Richard L. Guldi, Basab Chatterjee