Patent ID: 6897124
Filing Date: 2005-05-24
Classification: H01L,Y10S

Abstract:
1. A method for manufacturing a bonded wafer comprising: a bonded wafer preparation step of ion implanting at least one kind selected from the group consisting of a hydrogen ion, a rare gas ion and a halogen ion onto a main surface of a first wafer to form an ion implanted layer in the interior of the first wafer and bonding the main surface of the first wafer onto which ion implantation is effected to a main surface of a second wafer to heat treat the first wafer and the second wafer after bonding (hereinafter also referred to as a bonded dual wafer), to thereby separate the first wafer at the ion implanted layer in the form of a thin film; and a wafer recovery step of recovering at least one of a bonded wafer and a residual wafer, which is a residue of the first wafer, supported by a wafer supporting tool in a state of being superimposed on each other after the bonded wafer preparation step by suction holding the at least one using a Bernoulli chuck and wherein in the wafer recovery step, the Bernoulli chuck moves between a wafer holding position at which the bonded wafer and/or the residual wafer on the wafer supporting tool is held and a wafer recovery position at which the bonded wafer and/or the residual wafer held is recovered and the Bernoulli chuck suction holds the bonded wafer and/or the residual wafer at the wafer holding position, and moves to the wafer recovery position keeping this holding state, and then cancels the holding to thereby recover the bonded wafer and/or the residual wafer.