Patent ID: 7353076

Claim:
A vacuum processing method of a semiconductor processing apparatus for transferring a wafer via a vacuum robot, disposed in the interior of a transfer chamber to at least one of a plurality of processing chambers which are coupled to the transfer chamber, the vacuum robot transferring the wafer located thereon through a combination of a rotation movement and an arm's expansion or contraction of the vacuum robot consequently performed, mounting the wafer on a sample stage disposed in the interior of the processing chamber and processing the same, the method comprising: detecting a position correction quantity of the wafer with respect to the vacuum robot while the wafer is located on the vacuum robot based on both of an output from a θ axis sensor which detects an interception of the wafer during the rotation of the vacuum robot, and an R axis sensor which detects an interception of the wafer during the expansion or contraction of the vacuum robot; and changing an operation of transferring the wafer according to a result of said detecting the position correction quantity.