Abstract: A method of reworking copper metallurgy on semiconductor devices which includes selective removal of insulator, selective removal of copper, non-selective removal of copper and insulator followed by the redeposition of an insulating copper barrier layer and at least one metallurgical interconnect layer.

Abstract: A system is provided for controlling fan-out in a web offset press. A bowed roller is interposed upstream of the blanket cylinder of the first printing unit. The bowed roller applies outward lateral forces to the web, to expand the web laterally prior to printing thereon by the blanket cylinder of the first printing unit.

Abstract: A transmission system is provided for differential speed control. An endless, resilient member in the form of an endless belt is driven by an input pulley. The speed differential is derived by using the input speed taken from one effective radius of the resilient element and picking the output speed from a different effective radius of the resilient element, with the different effective radii being variably selectable. Thus an output pulley has its periphery in contact with the resilient member and a control carriage coupled to the resilient member is operative to vary the curvature of the resilient member with respect to the periphery of the output pulley. In this manner, the neutral axis of the resilient member is varied to control the speed of the surface of the resilient member that is contacting the periphery of the output pulley.

Abstract: An apparatus for providing a continuous supply of web material to a web printer or other system. The web material is fed from a first roll supported in a feed position, and when the first roll is near depletion, the leading end of a second roll is adhesively connected to the web of the first roll with that web then being severed. One belt drive means is employed for rotating both the forward and rearward rolls so that these achieve the same speed for the connecting and severing operations. The belt drive means are connected to the press drive through control means which vary the belt drive speed in accordance with the tension of the web. An indexing conveyor supports forward and rearward rolls to locate the rolls in the forward and rearward running positions and in intermediate positions for connecting and severing of the web material and for loading of new rolls into the system.

Abstract: A web aligning apparatus is disclosed wherein a web path correcting tilt frame is mounted for tilting movement between the laterally spaced side plates of the tilt frame support structure. The tilt frame includes a pair of laterally spaced frame members which extend generally longitudinally of the path of travel of the web through the apparatus and which rotatably support a pair of steering rollers therebetween. The axes of the steering rollers extend generally transversely to the path of travel of the web through the apparatus. A pair of elongated links respectively connect the tilt frame members with the support structure side plates and are arranged so that the instantaneous center of rotation of the tilt frame is located outside the perimeter of the tilt frame and shifts along an arcuate path that extends laterally of the path of travel of the web with tilting movements of the tilt frame.