Abstract:
A media supply system (40) suitable for use in an imaging apparatus (30) to remove sheets of imaging media from a stack (42) . Media supply system includes a pickup assembly (50) and an actuator system (52) . Pickup assembly is moveable between a first and second position, wherein a portion of the pickup assembly is configured to selectively engage a first sheet of the stack when the pickup assembly is in the first position. Actuator system is selectively coupled to the pickup assembly to move the pickup assembly between the first and the second position and to vibrate the portion of the pickup assembly engaging the first sheet at a desired frequency after moving the pickup assembly from the first position, wherein the desired frequency is based on characteristics of the sheets of imaging media.
Abstract:
A method of determining an overlay error. Measuring an overlay target having process-induced asymmetry. Constructing a model of the target. Modifying the model, e.g., by moving one of the structures to compensate for the asymmetry. Calculating an asymmetry-induced overlay error using the modified model. Determining an overlay error in a production target by subtracting the asymmetry-induced overlay error from a measured overlay error. In one example, the model is modified by varying asymmetry p (n'), p (n'') and the calculating an asymmetry-induced overlay error is repeated for a plurality of scatterometer measurement recipes and the step of determining an overlay error in a production target uses the calculated asymmetry-induced overlay errors to select an optimum scatterometer measurement recipe used to measure the production target.
Abstract:
A printing machine includes a movable lens, which may be placed in position at the time of printing and held at a stand-by position spaced apart from a film during other operations. In this way, maintenance and adjustment of the lens become easy. A sample print monitor comprising a CCD camera, a line sensor, etc., is provided for measuring deviation of the center of exposure to automatically register correction values. A desired exposure angle is obtained by rotating a negative mask portion, a lens portion, an exposure table, etc., at the same angle. In addition to a rotary mechanism, the lens portion is slid finely so as to constitute a printing machine of a three-dimensional photograph having higher accuracy. Moving means are provided to an enlarging lens and to the exposure table so as to effect printing by trimming. An edge shaver is caused to act in a rectangular direction to the travelling direction of printing paper so as to cut off dust within the range of the end surface of the tip of printing paper cut by a cutter, and the dust is sucked by a dust suction mechanism and is sent to a dust box.