Patent ID: 6514129
Filing Date: 2003-02-04
Classification: B24B

Abstract:
A chemical-mechanical planarization apparatus for planarizing an object, the apparatus comprising:a shaft having a shaft axis and being connected with a polishing head which is coupled to a polishing pad, the polishing pad having a smaller diameter than the object to be planarized, the shaft being rotatable to spin the polishing head and polishing pad around the shaft axis; and an orbit housing having, spaced from an orbital axis, an eccentric hole through which the shaft is rotatably disposed, the orbit housing being rotatable to orbit the shaft, the polishing head, and the polishing pad around the orbital axis, wherein the shaft is connected to an external tooth gear which is rotatably coupled with an internal tooth gear that is configured to be driven in rotation to rotate the external tooth gear to spin the shaft and polishing pad around the shaft axis.