| dc.description.abstract | Because of the Internship experience in semiconductor industry during my graduate studies, having the chance to see the production line and environment, after the observation in the industry, found out some defects that can be improve, so it let me decided to wright out this master thesis, in order to give suggestion to the company by the modeling result of my thesis.
Semiconductor industry is one of the most important industry in the world, the industry chain of semiconductor industry is truly complete. For its upstream industries, contains IP and IC design, midstream contains IC and wafer manufacturing, downstream contains IC packaging and testing. One kind of substrate, called ceramic substrate, was growing up in recent years, became popular material for some semiconductor industries. Because of the experience to observe the product line of ceramic substrate, let me decide to enhance the defects in the production process for ceramic substrate.
In semiconductor industry, it usually use lot as the unit to produce the product, so this thesis will also use lot as the production unit. Batch processing is also highly related to semiconductor industry and the problem is, the substrates have different sizes, choose the way to arrange different size of substrates in the lot will influence the production time, so find out the best way to arrange the substrates in the lot in order to minimize the tardiness of the lot will be the goal of this thesis.
In the final part of this thesis, it will use java Gurobi to run the model and shows the best combination of substrates that will minimize the tardiness. After that, this thesis will compare the modeling result and the true data of semiconductor industry, find out the difference, in order to set up the future goal.
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