Patent ID: 8673745
Filing Date: 2014-03-18
Classification: B23K,B28D,C03B,H01L

Abstract:
1. A method of cutting an object having a wafer-like shape, the object having a laminated portion including a functional device on a front face of the object, and a protective film attached to the front face of the object covering the functional device, the method comprising: a modified region forming step of irradiating the object with laser light while positioning a focusing point of the laser light within the object, thereby forming modified region within the object along a cutting line along which the object is to be cut, the modified region being deviated from a center position of the object in a thickness direction of the object towards a rear face of the object; and a pressing step of pressing the object from the front face of the object through the protective film to cut the object into chips, after the modified region forming step.