Mr. Diego Palma Profile

Diego Palma

at Synopsys Chile Ltda

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Proceedings Article | 3 October 2018 Paper

Fracture time predictor in mask data preparation using machine learning

Daniel Calderón, Diego Palma

Proceedings Volume 10810, 1081005 (2018) https://doi.org/10.1117/12.2502576

KEYWORDS: Data modeling, Machine learning, Statistical modeling, Performance modeling, Data processing, Statistical analysis, Photomasks, Artificial neural networks, Neural networks

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In Mask Data Preparation (MDP), fracture time can vary from a few seconds to hours or even days. Distributed computing is used to achieve reasonable times for large jobs. To allow more efficient scheduling of the available hardware infrastructure, we need a method to estimate fracture time. Such time estimation is difficult, not only because fracturing in MDP is becoming more complex as technology progresses, but also because fracture time has a direct correlation to the input data, which is a priori unknown. A fracture flow might include data transformations such as scaling, orientation, sizing, and arbitrarily complex Boolean operations among multiple inputs. This complexity provides an opportunity to explore a Machine Learning approach to derive a fracture time prediction model. In this paper we propose a novel machine learning-based method to automatically predict fracture time at the beginning of the process. The approach combines information from the input data and the fracture flow using supervised learning techniques. In particular, to train our machine learning model, we employ a scan of the data, a flow representation and a collection of measured times from real fractures. The work is divided into two parts: a simple fracture of only one input without further processing, and a more general case with several inputs and processes over them. In both cases, our experiments showed that our predictor can achieve low mean squared error estimates and a coefficient of determination (R²) over 0.70. The best results were obtained with a 2-layers artificial neural network (ANN) in a standard multi-layer perceptron (MLP) configuration.

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