Patent ID: 8900715
Filing Date: 2014-12-02
Classification: H01L

Abstract:
1. A semiconductor device comprising: a wafer comprising a plurality of chips and a first surface opposite a second surface, the first surface being an active surface to provide an electrical function; at least one laser irradiated region adjacent to and parallel to the first surface, the laser irradiated region comprising a laser-induced stress that is configured to increase a chip yield of the wafer by straightening at least one of the first and second surfaces in a region of the wafer where curvature was sensed, wherein the laser irradiated region comprises a plurality of spaced apart points that are amorphousized or partly amorphousized via a series of scans by a laser beam, the plurality of spaced apart points including a plurality of spaced apart points across a length of an area defined by the laser irradiated region and a plurality of spaced apart points across a width of the area such that spaced apart points are throughout the area; and at least one further laser irradiated region adjacent the second surface, the further laser irradiated region comprising a laser-induced stress that is configured to straighten at least one of the first and second surfaces.