Patent ID: 9156096
Filing Date: 2015-10-13
Classification: B23B,B23C,B23Q,H01L,Y10T

Abstract:
1. A tool cutting apparatus comprising: a chuck table having a holding surface for holding a workpiece; rotatable cutting means having a cutting tip for cutting a front side of said workpiece held on said chuck table; first feeding means for relatively moving said chuck table and said cutting means in a direction parallel to said holding surface of said chuck table; second feeding means for relatively moving said chuck table and said cutting means in a direction perpendicular to said holding surface of said chuck table; a pure water source for supplying a pure water; an additive source for supplying an additive; a mixing unit for mixing said pure water supplied from said pure water source and said additive supplied from said additive source to prepare a cutting fluid; and a cutting fluid nozzle for supplying said cutting fluid prepared by said mixing unit to said cutting tip of said cutting means and said workpiece held on said chuck table; wherein said additive does not contain 0.1 mass % or more of a water-insoluble component and contains 0.001 to 50 mass % of a polymer having 50 mass % or more of a monomer unit represented by the general formula (1) wherein each of R 1 to R 3 stands for a hydrogen atom or a hydrocarbon radical having one to eight carbon atoms.