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Techniques for controlling the periodic pattern and deviation
Techniques for controlling the periodic pattern and deviation
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机译:控制周期模式和偏差的技术
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摘要
A method and system to measure misalignment error between two overlying or interlaced periodic structures are proposed. The overlying or interlaced periodic structures are illuminated by incident radiation, and the diffracted radiation of the incident radiation by the overlying or interlaced periodic structures are detected to provide an output signal. The misalignment between the overlying or interlaced periodic structures may then be determined from the output signal.
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