In a complementary metal-oxide-semiconductor (CMOS) image sensor utilizing the classical Bayer pattern, the green color filter array (CFA) is typically processed first because green pixels comprise 50% of the imaging array and dominate the luminance signal for human visual perception P1, A1.Following the pre-lithography cleaning of the light shield grid, the green color filter resin is coated to fill the predefined grid cavities (Engineering Practice).Processing the green layer first establishes