A winch is disclosed which includes at least one rope drum about which a rope is slung as well as a transmission which is disposed between the rope drum and a drive motor. The transmission includes a drive shaft, an output shaft and a gear shifting device for different rope speeds. A stop brake is provided for the output shaft of the transmission. The gear shifting device is mounted between the drive shaft and the stop brake and is configured with respect to the output shaft so that it can be sh...

A universal grinding machine having a plurality of workpiece holders, each of which can be moved independently of each other or jointly, by a separate slide, in the longitudinal direction of the workpiece on a slide guide disposed on the machine bed, or which can be fixed independently of each other or jointly to the machine bed.

A polishing head for a chemical mechanical polishing (CMP) apparatus. The polishing head includes a backplate, a retaining ring supported by the backplate, and a bladder member encircled by the retaining ring. The backplate of the polishing head comprises a driving plate biasedly coupled to a subcarrier by a bellows. The polishing head may further include a lift plate disposed on the subcarrier and beneath the bladder member. A method for polishing a substrate includes placing a substrate on the...

A tool for distributing electrically conductive particles, and optionally abrasive particles, on the surface of a male, electrical jack connector and a tool for distributing electrically conductive particles, and optionally abrasive particles, on the surface of a female, electrical jack connector which tools can be interfitted so that each acts as a removable cover for the other. The tools can simultaneously clean while distributing particles. A method for using each of the tools.

A production type surface finishing apparatus for finishing the surfaces of work-pieces such as cabinet doors and the like which include a plurality of relatively large, very lightweight finishing platens that are simultaneously movable in both a reciprocal and an orbital-like motion. The platen is moved in a reciprocal motion by a first motion-imparting mechanism and is simultaneously moved in a high-frequency, orbit-like motion by a second motion-imparting mechanism that includes shafts which ...

A chemical-mechanical polishing apparatus includes a polishing table having a top surface and an annular trench formed in the top surface and defining an annular configured polishing area in the polishing table. A drive mechanism rotates the polishing table. An annular diaphragm is positioned within the annular configured polishing area and has a top surface and bottom surface. An annular configured polishing pad is positioned on the diaphragm. A fluid actuated pressure mechanism is associated w...

Method and apparatus for increasing chemical-mechanical-polishing (CMP) selectivity is described. A CMP pad is formed having a pattern of recesses and islands to provide non-contact portions and contact portions, respectively, with respect to contacting a substrate assembly surface to be polished. As the CMP pad is formed from a non-porous material, chemical and mechanical components of material removal are parsed to the non-contact portions and the contact portions, respectively. The relationsh...

A method for increasing the working life of retaining rings in a chemical-mechanical polishing machine. The method includes adding an extra pad between a retaining ring and a carrier so that the retaining ring is prevented from slippage and pressure on wafer can be evenly spread over the polishing pad of a polishing machine. Therefore, the rate at which a retaining ring wears out in chemical-mechanical polishing operation can be greatly reduced, and the working life of a retaining ring can be do...

A mill in a coal-burning utility electrical power generation plant has a rotary drum for pulverizing coal, and has a mill head at an axial end thereof. A stationary divider plate divides the mill head into an entrance receiving coal, and an exit discharging pulverized coal dust. An openable door on the mill head is moveable between a closed position and an open position. The door in the closed position is intersected by the rotational axis of the drum and has a lateral dimension transverse to su...

A method and apparatus for grinding wafers without using an ultraviolet tape attached to the front face of the wafer reduces manufacturing costs, simplifies the grinding process and protects the semiconductor chips formed on the front face of the wafer from being damaged by static electricity. The grinding apparatus uses a grind chuck formed of a soft material having a high elastic modulus and a rising groove formed in the grind chuck. Deionized water is supplied onto the wafer from a first dire...