Patent ID: 7195988

Claim:
A method of manufacturing semiconductor devices, said method comprising the steps of: forming a semiconductor circuit on a flat surface of a front surface of a semiconductor wafer main body; forming a plurality of holes that extend from said semiconductor circuit to said wafer main body; forming a separation portion of said semiconductor wafer on a peripheral portion of said wafer main body; filling a conductive material into said holes to form electrode portions; adhering a support plate of substantially the same diameter as that of said semiconductor wafer to the front surface of said semiconductor wafer by means of a binding material; partially removing the rear surface of said semiconductor wafer to eliminate said separation portion thereby to form a base and to expose one end faces of said electrode portions; partially removing a rear surface of said base to protrude said electrode portions therefrom; forming an insulating film on the rear surface of said base; and processing the one end faces of said electrode portions to form penetration electrodes, wherein said separation portion has a notch deeper than a finished thickness of said semiconductor wafer obtained by the partial removal of the rear surface thereof, said separation portion having a length which extends radially outward from said flat surface, and which is greater than a total sum of a maximum-minimum difference between the finish allowances of the diameters of said semiconductor wafer and said support plate, which has substantially the same diameter as that of said semiconductor wafer, and a maximum value of a positioning error between said semiconductor wafer and said support plate generated at the time of adhering them to each other.