Abstract: An apparatus and method for maintaining substantially uniform temperature of semiconductor wafers and similar workpieces is provided. The method and apparatus utilize a workpiece holder that is substantially a closed chamber, which includes a wall structure including a workpiece engaging wall in thermal communication with the chamber. The workpiece holder also includes a condenser that communicates with the chamber and a heater that applies heat to the chamber. The heater applies heat to a fluid inside the chamber such that when the fluid vaporizes within the chamber the condenser abstracts the heat from the fluid. This causes continual circulation of vapor through the interior of the chamber, which helps to maintain temperature uniformity. A feedback control system connected to one or more temperature sensors can control the heater, the condenser or both so as to maintain a predetermined set point temperature within the chamber.

Abstract: An apparatus and method for maintaining substantially uniform temperature of semiconductor wafers and similar workpieces is provided. The method and apparatus utilize a workpiece holder that is substantially a closed chamber, which includes a wall structure including a workpiece engaging wall in thermal communication with the chamber. The workpiece holder also includes a condenser that communicates with the chamber and a heater that applies heat to the chamber. The heater applies heat to a fluid inside the chamber such that when the fluid vaporizes within the chamber the condenser abstracts the heat from the fluid. This causes continual circulation of vapor through the interior of the chamber, which helps to maintain temperature uniformity. A feedback control system connected to one or more temperature sensors can control the heater, the condenser or both so as to maintain a predetermined set point temperature within the chamber.

Abstract: An apparatus for use in fishing in which a fisherman can toss the apparatus out of a boat and then leave the area so that there is no disturbance in the area of the apparatus to keep fish from being attracted to the bait attached to a hook. The apparatus consists of a container which may be hollow, filled with air and of sufficient size to float on the water, to provide enough resistance to set the hook in the mouth of the fish and to provide enough drag to tire the fish after the hook has been set in the mouth of the fish. Attached to a smaller end of the container is a lid to prevent water from entering the container. Also attached to the smaller end is a fishing line to which is attached a swivel, a sinker, and a hook to which bait may be attached.