Cameron M.
Cameron M. Duescher, Maplewood, MN US
Patent application number | Description | Published |
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20140370787 | VACUUM-GROOVED MEMBRANE ABRASIVE POLISHING WAFER WORKHOLDER - Hard-material, flat-surfaced workpieces such as semiconductor wafers or sapphire disks are attached with vacuum to the flexible elastomeric membrane of a wafer carrier that allows one surface of the workpiece to be in conformal abrading contact with a moving flat-surfaced abrasive. The elastomeric membrane external wafer attachment surface has a pattern of recessed vacuum grooves and vacuum is supplied to the grooves to firmly attach the rigid-material silicon wafer in flat-surfaced contact with the membrane. The attached wafer seals the vacuum grooves and also provides lateral stiffness to the center portion of the membrane. An outer annular extension of the flexible elastomer membrane maintains the wafer at its original membrane-centered location when abrading forces are applied to the rotating wafer. The rotating wafer peripheral edge does not contact a rigid retaining ring during a wafer polishing procedure. Fixed-abrasive disks or raised-island abrasive disks are attached to a rotatable flat-surfaced platen. | 12-18-2014 |
20150024662 | FLEXIBLE DIAPHRAGM POST-TYPE FLOATING AND RIGID ABRADING WORKHOLDER - Hard-material, flat-surfaced workpieces such as semiconductor wafers or sapphire disks are quickly attached with vacuum to a rotatable floating workpiece carrier. Fluid pressure in a sealed chamber applies uniform abrading pressure over the full abraded surface of the workpieces. A flexible diaphragm is used to form the sealed chamber and the carrier is rotationally driven by a lug-pin device. The floating carrier is horizontally restrained by a center-post device that provides rigid lateral support against abrading forces. Tilting of the floating carrier is provided by a spherical bearing. The abrading system can be operated at the very high abrading speeds used in high speed flat lapping with raised-island abrasive disks. Vacuum can also be applied to the sealed chamber to quickly move the workpiece away from the abrading surface. A mode of providing rigid parallel-surface abrading of a workpiece can be activated by simply applying vacuum to the sealed chamber. | 01-22-2015 |
Cameron M. Uhren, Ganaoque CA
Patent application number | Description | Published |
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20140066152 | Method for Operating Computer-Based Solitaire Game With Stack-Based Pay Table - A method for operating a computer-based solitaire game which collects a player's fee at the start of the game and pays a player award as a function of a per-card payout award and one or more of the number and/or identities of cards that have been transferred from the card deck on foundation stacks. The per-card payout award is determined as a function of an expected number of transferred cards, which number has been determined as a function of a discrete probability density function calculated from outcomes produced in a multi-game simulation. The number of games in the multi-game simulation is selected to provide a statistically stable result, and may be on the order of more than one million games. The simulated games are played by applying a set of ordinally-ranked solitaire game play rules. | 03-06-2014 |
Cameron M. Uhren, Gananoque CA
Patent application number | Description | Published |
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20150248819 | COMPUTER-BASED SOLITAIRE GAME WITH STACK-BASED PAY TABLE - A computer-based solitaire game which collects a player's fee at the start of the game and pays a player award as a function of a per-card payout award and one or more of the number and/or identities of cards that have been transferred from the card deck on foundation stacks. The game further includes a bonus game feature enabling the player to play a non-solitaire game within the solitaire game on the occurrence of a predetermined triggering event in the solitaire game. The per-card payout award of the solitaire game is determined as a function of an expected number of transferred cards, determined as a function of a discrete probability density function calculated in a multi-game simulation. The number of games in the multi-game simulation may be more than one million games. The simulated games are played by applying a set of ordinally-ranked solitaire game play rules. | 09-03-2015 |