The Bond Pad Opening 1 - Photo step defines the spatial mask required to etch through the Upper OCL (On-Chip Lens) Coating to access underlying electrical interconnections P2.Following the deposition and cleaning of the protective oxide, this lithographic process ensures a defect-free surface for optimal photoresist adhesion P1.Unlike the high-density nanoscale patterning of Metal 0/1 gate and source/drain contacts T3, this step dictates macroscopic geometric bounds for packaging structures P2.F