Patent ID: 6193586
Filing Date: 2001-02-27
Classification: B24B

Abstract:
An apparatus for grinding wafers comprising:a process chamber 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 said wafer by a vacuum suction force, wherein each grind chuck comprises a body having a predetermined thickness and a shape corresponding to said wafer, a ring-shaped porous portion formed in a central region of said body and having a plurality of pores, and a ring-shaped rising groove formed in a peripheral portion of said body;a deionized water supply duct for spraying deionized water onto said wafer;a first grind unit for grinding said wafer to a first thickness;a second grind unit for grinding said wafer to a second thickness;a grind chuck accommodating groove formed in said grind table for accommodating said grind chuck;an intake and exhaust groove formed in said grind chuck accommodating groove corresponding to said porous portion of the grind chuck;a fluid supply duct formed in said grind table, said fluid supply duct being connected to a rise hole formed through said body, said rise hole being connected to said rising groove; anda vacuum pump and a blower connected to said intake and exhaust groove through an intake and exhaust hole formed through said grind table.