Patent ID: 7550367
Filing Date: 2009-06-23
Classification: B23K,B28D,H01L

Abstract:
1. A method for separating at least one semiconductor chip from a semiconductor substrate, wherein the substrate includes an implementation member adhered to a first side of the semiconductor substrate, the method comprising the steps of: severing the implementation member on the first side of the semiconductor substrate along a separation line, which is defined by a virtual plane intersecting the semiconductor substrate; combining a film member with the implementation member on the first side of the semiconductor substrate; forming a modified area by a multiphoton absorption induced by irradiation of a laser beam on at least one of the first side of the semiconductor substrate and a second side, which is opposite to the first side, with a focusing point of the laser beam located on the virtual plane in the semiconductor substrate; and severing and removing the at least one semiconductor chip at the separation line in the semiconductor substrate.