Patent ID: 6629876
Filing Date: 2003-10-07
Classification: B24B

Abstract:
An apparatus for grinding wafers comprising:a process chamber for providing a space for performing a wafer grinding process; a grind table installed partially inside and partially outside of said process chamber; a plurality of grind chucks mounted on said grind table for holding wafers by a vacuum suction force, wherein each grind chuck comprises a body having a predetermined thickness and a shape corresponding to the wafers, and a ring-shaped porous portion formed in a central region of the body and having a plurality of pores; a deionized water supply duct for spraying deionized water onto the wafers; a first grind unit for grinding the wafers to a first thickness; a second grind unit for grinding the wafers to a second thickness; a plurality of dams formed on said grind table, each dam surrounding one of said grind chucks and forming a space in which one of said first and second grind units operates; deionized water exhaust holes formed through said grind table in the spaces surrounded by said dams; grind chuck accommodating grooves formed in said grind table in the spaces surrounded by said dams, for accommodating said grind chucks; intake and exhaust grooves formed in said grind chuck accommodating grooves corresponding to the porous portions of the grind chuck bodies; and a vacuum pump and a blower connected to said intake and exhaust grooves through intake and exhaust holes formed through said grind table.