Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
Apparatus, backing plate, backing film and method for chemical mechanical polishing
A polishing apparatus has a guide (5) to be pressed against a polishing cloth (7) when polishing an object (1). Within the guide, a ring (3) is arranged between a backing plate (4) and a backing film (2). When the guide and polishing cloth are rotated to rub with each other, force of the periphery of the object of pressing the polishing cloth drops. The ring prevents such a force drop, thereby equalizing polishing rates over a surface of the object. Also provided is a polishing method applied to the polishing apparatus.
Kabushiki Kaisha Toshiba
B
B24B
inventional
Nobuhiro Tomoharu
Kato Watanabe