Patent ID: 7662666
Filing Date: 2010-02-16
Classification: H01L

Abstract:
1. A method of processing a wafer, for cutting, along planned cutting lines, a wafer in which a plurality of devices formed on a surface of the wafer are demarcated from each other by the planned cutting lines, said devices being provided with projected electrodes at surfaces thereof, and an insulation layer is formed on the surface of said wafer, said method comprising sequentially performing: a covering step for covering a surface of said insulation layer with a film-like underfill material; a laser beam irradiation step for irradiating said wafer with a laser beam from a surface of said underfill material and along said planned cutting lines so as to remove at least said underfill material and said insulation layer present over said planned cutting lines; and a cutting step for cutting a face layer of said underfill material so as to expose said projected electrodes and make the projected electrodes flush in height.