Lithography is a very important process of a in semiconductor manufacturing, and its purpose is to define the pattern. A lithography combines resist coating, soft bake, edge bead rinse, exposure and development… etc, and the problem happened on each step could be the key factor to decide the performance. excepting the issues from equipments, the chemicals used in each step will also be the factors.  SST provides customers a series chemicals which been used in lithography, not only the quality of chemicals, but also supporting technical services. Process improvement and cost reduction for customers are always our goals.