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Integrated local and global optical metrology for samples having miniature features
Integrated local and global optical metrology for samples having miniature features
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机译:集成的本地和全球光学计量学,可用于具有微型特征的样品
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摘要
This invention relates to an apparatus and method for integrated measurement of a sample that has miniature features. The apparatus has an optical measuring unit for illuminating the sample with a global test radiation over an optical test region and obtaining an optical response, such as scattered or transmitted radiation from the optical test region. In addition, the apparatus has a local measuring unit for making a nanometer scale measurement of a local material parameter ρ of the sample. The local parameter ρ is determined with a mechanical, optical, magnetic, electric or other physical measurement performed in the nanometer range with a scanning probe tip at a test location lying within the optical test region. The material parameter ρ is selected such that it is substantially constant or uniform over the illuminated area. A computational unit determines a property of the miniature features within the optical test region from the optical response supplemented with an adjustment derived from the local material parameter obtained by the local measuring unit.
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