RR5 Resist Remover RR5 is a stripping solution designed to remove photoresist from the surface of a substrate. Properties ♦ Principal solvent: proprietary solvent mixture ♦ Melting temperature (°C): -20 ♦ Appearance: clear liquid ♦ Specific gravity at 25°C (g/cm³): >1 ♦ Guaranteed shelf life at 25°C storage (years): 3 Processing 1 Pour the solution into a resist stripping tank. 2 RR5 strips NR4-, NR9- and PR1-series resists at room temperature. To strip NR1-, NR5- and NR7-series resists, RR5 needs to be heated to 100°C under an exhaust hood. 3 Place the resist coated substrate in RR5 for 15 minutes. 4 Rinse the substrate with deionized water until the water resistivity reaches the prescribed limit.