Chafin
Craig R. Chafin, Colorado Springs, CO US
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20120296598 | COMPENSATING FOR JITTER DURING DDR3 MEMORY DELAY LINE TRAINING - A method for compensating for jitter during DDR3 delay line training may include using a computer or processor to perform the steps of executing a plurality of tests for each one of a plurality of delay values for an interconnect delay between a Double-Data-Rate Three (DDR3) memory controller and a DDR3 Synchronous Dynamic Random Access Memory (SDRAM); accumulating a plurality of test results for each plurality of tests for each one of the plurality of delay values; determining a plurality of final test results, where each final test result is associated with an accumulated plurality of test results; and determining a working window edge for the interconnect delay between the DDR3 memory controller and the DDR3 SDRAM utilizing the plurality of final test results. | 11-22-2012 |
20130091388 | HARDWARE QUEUE FOR TRANSPARENT DEBUG - A method for transparent debug of a hardware queue and recreation of an operational scenario comprising: use of a computer device to: monitor a plurality of inputs and outputs from a plurality of hardware queues associated as parts of a design; receive a request to save from an external source; pause one or more hardware queues upon command; receive hardware queue information from at least one of the paused hardware queues; dump said hardware queue information from at least one paused hardware queue; store the hardware queue information in a data storage connected to the computing device; compare the received information to stored data representative of a functional hardware queue; identify errors and failures in each monitored hardware queue from the comparing and; restore the hardware queue to a previous state. | 04-11-2013 |
20130262398 | SCATTER GATHER LIST FOR DATA INTEGRITY - A system and method for improving message passing between a computer and peripheral devices is disclosed. The system and method for improving message passing between a computer and peripheral devices incorporate data checking on the command/message data and each scatter gather list element. The method in accordance with the present disclosure enables a peripheral device to check the integrity of the message and ownership of the scatter gather list element before the data is processed. | 10-03-2013 |
David Chafin, Tucson, AZ US
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20090170152 | Tissue Conditioning Protocols - Solutions exhibiting little or no evaporative loss at elevated temperatures, i.e., in excess of 100° C., are employed in place of conventional aqueous-based antigen retrieval solutions. | 07-02-2009 |
20120214195 | METHOD FOR TISSUE SAMPLE FIXATION - An aldehyde fixative solution at a first temperature is caused to contact a tissue sample for a first time period, additionally an aldehyde fixative solution is caused to contact the tissue sample at a second temperature higher than the first temperature for a second time period. The first time period typically ranges from about 15 minutes up to about 4 hours, and the first temperature typically is from greater than 0° C. to at least 15° C. The second temperature typically is from greater than about 22° C. to about 55° C., and the second time period ranges from about 1 hour to about 4 hours. Using this process, improved tissue morphology and IHC staining as well as superior preservation of post-translation modification signals have been accomplished in approximately 4 hours compared to 24 hours for room temperature protocols, and more even morphology and antigen preservation are observed. | 08-23-2012 |
20120329088 | PROCESSING SYSTEM FOR PROCESSING SPECIMENS USING ACOUSTIC ENERGY - A method for fixing a biological sample includes delivering energy through a biological sample that has been removed from a subject, while fixing the biological sample. A change in speed of the energy traveling through the biological sample is evaluated to monitor the progress of the fixation. A system for performing the method can include a transmitter that outputs the energy and a receiver configured to detect the transmitted energy. A computing device can evaluate the speed of the energy based on signals from the receiver. | 12-27-2012 |
20130224791 | SYSTEMS AND METHODS FOR MONITORING TISSUE SAMPLE PROCESSING - A tissue sample that has been removed from a subject can be evaluated. A change in speed of the energy traveling through the sample is evaluated to monitor changes in the biological sample during processing. The monitoring can detect movement of fluid with the sample and cross-linking. A system for performing the method can include a transmitter that outputs the energy and a receiver configured to detect the transmitted energy. | 08-29-2013 |
Michael G. Chafin US
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20090097185 | Time-based wafer de-chucking from an electrostatic chuck having separate RF bias and DC chucking electrodes - An electrostatic chuck in a reactor chamber has a cathode electrode insulated from ground, a chucking electrode insulated from the cathode electrode and a dielectric layer overlying the chucking electrode that provides a workpiece support surface. A D.C. chucking voltage supply is coupled to the chucking electrode. An RF power generator is coupled to the cathode electrode. A voltage sensing apparatus is coupled to the chucking electrode and to the cathode electrode to monitor the voltage difference between them during discharge after removal of RF and DC power at the conclusion of processing. The reactor includes a controller programmed to raise the lift pins during electrode discharge as soon as the voltage sensing apparatus detects equal voltages simultaneously on the chucking and cathode electrodes. | 04-16-2009 |
Michael G. Chafin, Santa Clara, CA US
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20110157760 | ELECTROSTATIC CHUCK WITH REDUCED ARCING - Embodiments of electrostatic chucks are provided herein. In some embodiments, an electrostatic chuck may include a body having a notched upper peripheral edge, defined by a first surface perpendicular to a body sidewall and a stepped second surface disposed between the first surface and a body upper surface, and a plurality of holes disposed through the body along the first surface; a plurality of fasteners disposed through the plurality of holes to couple the body to a base disposed beneath the body; a dielectric member disposed above the body upper surface to electrostatically retain a substrate; an insulator ring disposed about the body within the notched upper peripheral edge and having a stepped inner sidewall that mates with the stepped second surface to define a non-linear interface therebetween; and an edge ring disposed over the insulator ring, the non-linear interface limiting arcing between the edge ring and the fastener. | 06-30-2011 |
20130277339 | PLASMA REACTOR ELECTROSTATIC CHUCK WITH COOLED PROCESS RING AND HEATED WORKPIECE SUPPORT SURFACE - Undesirable heating of a semiconductor process ring is prevented by thermally isolating the process ring from the insulating puck of an electrostatic chuck, and providing a thermally conductive and electrically insulating thermal ring contacting both the semiconductor process ring and an underlying metal base having internal coolant flow passages. | 10-24-2013 |
20140034241 | TEMPERATURE ENHANCED ELECTROSTATIC CHUCKING IN PLASMA PROCESSING APPARATUS - Methods and systems for temperature enhanced chucking and dechucking of resistive substrates in a plasma processing apparatus are described herein. In certain embodiments, methods and systems incorporate modulating a glass carrier substrate temperature during a plasma etch process to chuck and dechuck the carrier at first temperatures elevated relative to second temperatures utilized during plasma etching. In embodiments, one or more of plasma heat, lamp heat, resistive heat, and fluid heat transfer are controlled to modulate the carrier substrate temperature between chucking temperatures and process temperatures with each run of the plasma etch process. | 02-06-2014 |
20140375299 | NON-INTRUSIVE MEASUREMENT OF A WAFER DC SELF-BIAS IN SEMICONDUCTOR PROCESSING EQUIPMENT - A direct (DC) voltage is applied to an electrode at a voltage value to clamp a workpiece to an electrostatic chuck in a processing chamber. The electrode is embedded into the electrostatic chuck. An electrostatic chuck current through the electrode at the DC voltage is measured. A DC self bias induced on the workpiece by a plasma is determined based on the electrostatic chuck current and the applied voltage. | 12-25-2014 |
Raymond Chafin, Houston, TX US
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20110240518 | GASOLINE HYDRODESULFURIZATION AND MEMBRANE UNIT TO REDUCE MERCAPTAN TYPE SULFUR - A process for the hydrodesulfurization of gasoline is disclosed, the process including: feeding (1) a cracked naphtha containing mercaptans and other organic sulfur compounds and (2) hydrogen to a first hydrodesulfurization reactor containing one or more beds of a hydrodesulfurization catalyst; contacting sulfur compounds comprising the other organic sulfur compounds in the cracked naphtha with hydrogen in the presence of a hydrodesulfurization catalyst to convert a portion of the other organic sulfur compounds to hydrogen sulfide; withdrawing from the hydrodesulfurization reactor an effluent comprising hydrocarbons and hydrogen sulfide. The effluent from the hydrodesulfurization reactor is fed to a membrane separation system containing a membrane for partitioning the hydrocarbons from the hydrogen sulfide. For example, the membrane may be selective to hydrogen sulfide, to separate a permeate fraction comprising hydrogen sulfide from a residue fraction comprising the hydrocarbons. | 10-06-2011 |
20120043260 | PROCESS TO HYDRODESULFURIZE FCC GASOLINE RESULTING IN A LOW-MERCAPTAN PRODUCT - A process for reducing the sulfur content of a hydrocarbon stream, including: feeding hydrogen and a hydrocarbon stream including sulfur compounds to a catalytic distillation reactor having one or more hydrodesulfurization reaction zones; concurrently in the catalytic distillation reactor: fractionating the hydrocarbon stream into a heavy fraction and a light fraction; contacting hydrogen and the light fraction to form H | 02-23-2012 |
Raymond W. Chafin, Pearland, TX US
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20080200696 | SEPARATION PROCESS USING AROMATIC-SELECTIVE POLYMERIC MEMBRANES - Processes are disclosed for production of value-added products from fluid admixtures of hydrocarbon compounds at least one of which is an aromatic hydrocarbon compound, by means of one or more devices using perm-selective polymeric membranes. More particularly, processes of the invention comprise separations using aromatic-selective polymeric materials comprising long-chain polymeric molecules in which recurring amide and imide linkages are part of the main polymer chain. Processes of the invention advantageously employ aromatic-selective membranes to separate an aromatic enriched stream from gaseous and/or liquid mixtures comprising one or more aromatic hydrocarbon compounds thereby producing a stream comprising the remaining compounds which may include alkenes and/or alkanes containing 3 or more carbon atoms, and/or alicyclic hydrocarbons. Processes of the invention are particularly useful for recovery of meta-xylene and para-xylene products from liquid mixtures even containing ethylbenzene as well as the three xylene isomers. | 08-21-2008 |