摘要:
Apparatus for exposure and probing of features in a semiconductor workpiece includes a hollow concentrator for covering a portion of the workpiece connected by a gas conduit to a supply of etchant gas. A stage supports and positions the semiconductor workpiece. Control means moves the stage and the semiconductor workpiece to the series of positions sequentially. An energy beam source directs a focused energy beam through an aperture through the concentrator onto a region on the surface of the workpiece in the presence of the etchant gas. The control means moves the stage to a series of positions with respect to the concentrator and the energy beam to direct the energy beam in the presence of the etchant gas to expose a series of regions on the surface of the semiconductor workpiece positioned below the hollow interior space of the concentrator, sequentially.
摘要:
A method and system for backside unlayering a semiconductor device to expose FEOL semiconductor features of the device for subsequent electrical and/or physical probing. A window is formed within a backside substrate layer of the semiconductor. A collimated ion plasma is generated and directed so as to contact the semiconductor only within the backside window via an opening in a focusing shield. This focused collimated ion plasma contacts the semiconductor, only within the window, while the semiconductor is simultaneously being rotated and tilted by a temperature controlled stage, for uniform removal of semiconductor layering such that the semiconductor features, in a location on the semiconductor corresponding to the backside window, are exposed. Backside unlayering of the invention may be enhanced by CAIBE processing.
摘要:
A method for preparing a semiconductor die for analysis comprises providing a semiconductor die having a connector on one side and an opposite, backside surface to be analyzed, providing a polishing pad for polishing the backside surface of a semiconductor die, providing a rotatable spindle for securing the polishing pad, and providing a constant force actuator on the spindle, the constant force actuator being adapted to provide constant force between the polishing pad and the backside surface of the die. The method then includes contacting the backside die surface with the polishing pad, rotating the spindle and polishing pad, and polishing the backside surface of the die while maintaining the substantially constant force of the polishing pad on the die backside surface with the constant force actuator.