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- W1978723193 abstract "International SEMATECH (ISMT) and the National Institute of Standards and Technology (NIST) are working together to improve the traceability of atomic force microscope (AFM) dimensional metrology in semiconductor manufacturing. The rapid pace of technological change in the semiconductor industry makes the timely introduction of relevant standards challenging. As a result, the link between the realization of the SI (Systeme International d’Unites, or International System of Units) unit of length - the meter - and measurements on the fab line is not always maintained. To improve this situation, we are using an at-line critical dimension-AFM (CD-AFM) at ISMT as a developmental platform. This tool has been implemented as a Reference Measurement System (RMS) in the facilities at ISMT. However, it is currently being replaced by a next-generation CD-AFM tool. Using the current tool, we have performed measurements needed to establish the traceability chain and developed uncertainty budgets. Specifically, we have developed uncertainty budgets for pitch, height, and critical dimension (CD) measurements. Some evaluations were performed using samples for which a full traceability chain is not available. We expect to improve the uncertainties further for such samples. At present, the standard uncertainties are estimated to be approximately 0.2 % for pitch measurements, 0.4 % for step height measurements, and 5 nm for CD measurements in the sub-micrometer range. Similar budgets will be developed for the new tool once it is installed. We will describe our methodology for RMS implementation and the major applications for which it has been used. These include measurements on new NIST/ISMT linewidth standards, a reference tool for CD-scanning electron microscopes (SEMs), metrology on photo-masks, CD-SEM benchmarking, and 193 nm resist shrinkage measurements." @default.
- W1978723193 created "2016-06-24" @default.
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- W1978723193 date "2003-05-27" @default.
- W1978723193 modified "2023-09-24" @default.
- W1978723193 title "Implementation of Reference Measurement System using CD-AFM" @default.
- W1978723193 doi "https://doi.org/10.1117/12.483667" @default.
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