Abstract: A bowling ball is disclosed with a core having low density roll blocks or end caps which lowers the differential radius of gyration and lowers the maximum radius of gyration of the ball in order to create a different ball path from the foul line to the pins. When the bowling ball core of the present invention is used within a bowling ball it results in a bowling ball that rolls earlier on the lane for a smooth, curving ball path and less angle change in the backend of the lane.

Abstract: A method in a plasma processing chamber for etching through a selected portion of a metallization layer of a wafer's layer stack. The method includes the step of etching at least partially through the metallization layer of the layer stack with an etchant source gas that consists essentially of chlorine and nitrogen. In another embodiment, the metallization layer comprises aluminum, and the flow ratio of the chlorine to the nitrogen ranges from about 1:1 to about 10:1. More preferably, the flow ratio of the chlorine to the nitrogen ranges from about 1:1 to about 4:1 and preferably ranges from about 1:1 to about 2:1.

Abstract: A method of fabricating free-standing thin films of polyimide by casting a polyamic acid solution onto a substrate that is free of parting agents and release agents is disclosed. The polyamic acid film is imidized on the substrate. The thickness of the polyimide film can range from about 200 .ANG. to about five microns. A frame is adhered to the polyimide film while the film still attached to the substrate, and the frame, film, and substrate assembly is immersed in an aqueous based liquid bath for several hours wherein the liquid bath is free of reactive chemical agents. The liquid bath is heated, preferably, to a temperature within the range 30.degree. to 100.degree. C. The liquid is prevented from contacting the polyimide film within the interior region of the frame. Next, the assembly is removed from the water bath. The film is scored around the outside edge of the frame with a cutting tool; this cutting step may be performed either prior to, during, or after the immersion step.

Abstract: The present invention provides polymerizable compositions which may be cured with ultraviolet light to form polymer compositions which are especially useful as channel optical waveguides. In particular, they exhibit stability at elevated temperatures such as occur in, for example, reflow soldering.

Abstract: A protected fiber optic waveguide comprising:(I) a core;(II) a cladding disposed on, around, and in contact with the exterior surface of the core; and(III) a buffer coating disposed on, around, and in contact with the exterior surface of the cladding, the buffer coating comprising a polysiloxane material comprising:(a) a polydimethylsiloxane and(b) a copolysiloxane comprising(i) a repeat unit selected from the group consisting of methylphenylsiloxane and diphenylsiloxane and(ii) a dimethylsiloxane repeat unit,the molar ratio of units (i) to units (ii) being between about 10:90 and about 80:20 if unit (i) is methylphenylsiloxane and between about 5:95 and about 50:50 if unit (i) is diphenylsiloxane;the weight ratio of polydimethylsiloxane (a) to copolysiloxane (b) being between about 5:95 and about 85:15.