Patent ID: 6481956
Filing Date: 2002-11-19
Classification: B25J,H01L,Y10S

Abstract:
A method of transferring semi-conductor substrates from a first location to a second location, the first and second locations being adapted to hold a plurality of the substrates in individual support areas, the method comprising steps of:providing a transfer mechanism with a first end effector and a second end effector, the first end effector having a first number of support areas adapted to individually support a first maximum number of substrates thereon and the second end effector having a second number of support areas adapted to individually support a second lower maximum number of substrates thereon; transferring substrates from the first location to the second location with the first end effector; and when empty individual support areas in the second location are less than the first number of support areas on the first end effector, transferring substrates from the first location to the second location with use of only the second end effector and not the first end effector.