SPR660 series is an advanced i-line photo- resist designed for processing 0.350 micron features and larger. SPR660 performs in both line / space and contact hole applica- tion and on variety of substrates, including silicon dioxide, titanium nitride, and organic anti-reflectant coatings. The SPR660 product family includes a range of undyed dilutions as well dye loadings for improved processing over reflective surface.