Paper
1 May 1994 Extraction of process specific photolithography model parameters
Patrick G. Drennan, Bruce W. Smith
Author Affiliations +
Abstract
In order to truly represent photolithography through simulation, the exposure, bake, and development models and model parameters must be accurate. Using the approach for the measurement of the in-situ development rate, developed in the first paper of this two paper series, the model parameters were extracted for Shipley 812 resist with Shipley MF312 developer. Development rates for exposures of 66, 90, and 114 mJ/cm2 were measured. It was discovered that the set of Kim model parameters, R1 through R6, were highly correlated with the combination of the Dill exposure parameters. Thus, for A equals 0.581 micrometers -1, B equals 0.082 micrometers -1 equals 0.013 cm2/mJ, the parameters R1 equals 25.559 micrometers /min, R2 equals 10.451 micrometers /min, R3 equals 1.879, R4 equals 0.112, R5 equals 1.586, R6 equals 0.000 micrometers , and (sigma) equals 0.0016 micrometers were extracted. A comparison of simulated data using the extracted model parameters with the measured data demonstrated the quality of the fit.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Patrick G. Drennan and Bruce W. Smith "Extraction of process specific photolithography model parameters", Proc. SPIE 2196, Integrated Circuit Metrology, Inspection, and Process Control VIII, (1 May 1994); https://doi.org/10.1117/12.174146
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KEYWORDS
Process modeling

Optical lithography

Data modeling

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