Patent ID: 6875306

Claim:
A vacuum processing device comprising: atmospheric transfer equipment disposed in an atmospheric transfer unit for transferring a wafer in air; a vacuum processing chamber for performing a predetermined treatment to a wafer transferred to and located on a predetermined position; a vacuum transfer equipment disposed within a vacuum transfer chamber connecting the atmospheric transfer unit and the vacuum processing chamber, for transferring the wafer received from the atmospheric transfer equipment to said predetermined position within the vacuum processing chamber; a wafer position sensor disposed near an ingress path of the wafer leading to the vacuum processing chamber for detecting an actual position of the wafer being transferred by the vacuum transfer equipment, for comparing a correct position of the wafer passing a line which is predetermined in advance, and for sensing a displacement of the actual position of the wafer being transferred from the correction position thereof in a transverse direction with respect to the traveling direction; and a correction means for correcting the displacement of said wafer by moving an arm of the vacuum transfer equipment in the transverse direction with respect to the traveling direction based on the result of detection performed by said wafer position sensor.