SUBA™ polishing pads are polyurethane impregnated polyester felts. They are specifically designed for stock and intermediate polishing where achieving a high precision surface is critical. SUBA™ pads should be used in combination with each other and with final polishing pads to produce a haze-free, low defect finish in dual or multi-step processes. SUBA™ pads are ideal for a wide variety of materials including semiconductor wafers, glass, ceramics, special metals and plastic. SUBA™ IV features an open pore structure and a less aggressive urethane composition than the other SUBA™ pads. These qualities make it an ideal primary polishing pad for low to medium pressure applications with fragile crystals or delicate surfaces.