Patent ID: 7960250
Filing Date: 2011-06-14
Classification: B28D,B32B,H01L

Abstract:
1. A method for manufacturing a device, in which a wafer having devices formed in a plurality of regions defined by predetermined division lines formed in a lattice pattern on a surface of the wafer is divided into the individual devices along the predetermined division lines, and an adhesive film for die bonding is mounted on a back side of each device, the method comprising: a cutting groove forming step of cutting a back side of the wafer along the predetermined division lines by a cutting blade to form cutting grooves, while leaving an uncut portion, which is thinner than a target thickness of the device, on a front side of the wafer; a back side grinding step of grinding a back side of the wafer, which has been subjected to the cutting groove forming step, to the target thickness of the device, while allowing the cutting grooves to remain in the back side of the wafer; an adhesive film mounting step of mounting an adhesive film to the back side of the wafer which has been subjected to the back side grinding step; a wafer supporting step of sticking the adhesive film side of the wafer, on which the adhesive film has been mounted, to a surface of a dicing tape mounted on an annular frame; a wafer severing step of cutting the front side of the wafer, which has been stuck to the surface of the dicing tape via the adhesive film, along the predetermined division lines by a cutting blade to sever the uncut portion, thereby dividing the wafer into the individual devices and cutting the adhesive film; and an adhesive film separating step of expanding the dicing tape, after performing the wafer severing step, to separate the adhesive film per device.