Patent ID: 7763525

Claim:
A method for positioning a dicing line of a semiconductor wafer having multiple semiconductor devices disposed on the wafer, wherein the wafer includes a support substrate, an embedded insulation layer and a semiconductor layer, which are stacked in this order, and wherein each semiconductor device includes a movable portion formed in the semiconductor layer of the wafer, the method comprising the steps of: bonding an adhesive tape on the semiconductor layer of the wafer; detecting an image of the wafer by an imaging device on the basis of a light transmitted through the wafer, wherein the light is emitted from a light source disposed on a semiconductor layer side of the wafer, and wherein the imaging device is disposed on a support substrate side of the wafer; and determining the dicing line of the wafer on the basis of a position of an image of a marker, which is disposed on the semiconductor layer of the wafer, wherein the image of the marker is obtained by image recognition from the detected image of the wafer, wherein the marker is a bonding pad made of metal, the light is an infrared light, in the step of determining the dicing line, the dicing line is determined on the basis of a center position of the bonding pad, the bonding pad includes aplurality of metal pads, the dicing line includes a plurality of dicing line segments, and the determining the dicing line includes: drawing a line between two center positions of the plurality of metal pads; defining an orthogonal coordinate system based on the line, wherein the line determines one of two orthogonal axes; and determining one of the plurality of dicing line segments so that the one of the dicing line segments is separated from one of the orthogonal axes by a predetermined distance.