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Method and system of monitoring E-beam overlay and providing advanced process control
Method and system of monitoring E-beam overlay and providing advanced process control
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机译:监视电子束覆盖并提供高级过程控制的方法和系统
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摘要
A method for monitoring overlay of a direct-write system. The method includes providing a substrate having a pattern formed thereon by the direct-write system, generating data associated with the substrate pattern, decomposing the data by applying a transformation matrix, and determining an overlay index based on the decomposed data, the overlay index corresponding to a variation component of the substrate pattern relative to a target pattern.
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