The theory and the algorithm of the fuzzy neural network were applied in the research of the fabrication of high resolute microstructure using negative (SU-8)
the artificial neural network were trained based on orthogonality experiment
and the prediction model was built between the fabrication structure quality and the main technology parameters. The model was a Feedforward Fuzzy neural network possessing five layers
and Gradient Descent was adopted as learning algorithm. The experiment results show that the temperature and the soft bake time is the most important factor of the structure quality. when thickness of the photoresist is ranged from 120~340 μm
the temperature and time of the soft bake is 95℃ and 100 min
respectivly
then the optimal microstructure with the least relative line width discrepancy can be obtained. In addition
the developing time is reduced and the image quality is greatly improved through ultrasonic agitation. The predict results are in good agreement with the experimental results
and the lithographic process could be optimized with fuzzy neural network.
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references
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