Patent ID: 7759223

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: preparing a semiconductor wafer comprising: a plurality of first scribe lines extending in two mutually perpendicular directions, said first scribe lines having a first width and dividing the semiconductor wafer into a plurality of areas; a plurality of second scribe lines having a second width smaller than the first width, said second scribe lines dividing the area into a plurality of semiconductor chip areas; an electrode pad formed along the edge of the chip area; and a metal-containing accessory pattern disposed in the scribe lines, wherein in the second scribe lines, the metal-containing accessory pattern is absent in at least the outermost surface in an area adjacent to the edge having the electrode pad in the semiconductor chip area; and forming a groove in the second scribe lines by irradiating with a laser beam; and cutting the first scribe lines and the second scribe lines with a blade; wherein at least parts in the first scribe lines other than intersections with the second scribe lines are not irradiated with the laser beam.