Grinder, grinding method, a method of manufacturing a display device and a display device

An abrasive machine comprising: a grinding unit including a grinding surface; a shaft connected to the grinding means, said polishing means for rotating. The grinding unit comprises a healing agent and an abrasive and a mixture of polyurethane-carboxylate, the angle between the rotation axis of the shaft perpendicular to the plane and the polishing surface α satisfies 1 ° ≤α≤7 °.