SYSTEM, METHOD AND APPARATUS FOR ELASTOMER PAD FOR FABRICATING MAGNETIC RECORDING DISKS

摘要

A pad for polishing media disks has an elastomeric body with a Shore A hardness of not greater than 20, and a coating of polystyrene (PS) and a flexible polymer. The elastomeric pad may comprise styrene-isoprene-styrene block copolymers, or a styrene-ethylene-butylene-styrene block copolymer. The pad may be viscoleastic with a particulate composite coating. The pad may be a styrenic block copolymer and the coating is a different type of styrenic block copolymer containing solid particles. The coating may have a binder with a mixture of PS and flexible styrenic block copolymers, and filler particles comprising cross-linked PS/divinylbenzene polymer microspheres.