Patent ID: 6997779

Claim:
A device for the simultaneous double-side grinding of workpieces in wafer form, comprising two substantially circular grinding wheels arranged collinearly, the grinding surfaces of which are positioned opposite one another in the axial direction based on the axes of rotation of the grinding wheels, and define a midplane located between the grinding wheels, and two devices, likewise positioned opposite each other, for hydrostatically bearing the workpiece in wafer form, each of which comprise at least one hydrostatic bearing and in each case at least one dynamic pressure tube for measuring the spacing between the workpiece and the device for hydrostatic bearing, wherein that surface of each of the two devices for hydrostatic bearing which faces the workpiece is nonplanar, such that the spacing between the surface and the midplane between the grinding wheels has a minimum value proximate that edge of the device for hydrostatic bearing which faces the grinding wheels, and the spacing increases with increasing distance from the grinding wheels.