Patent ID: 8146530

Claim:
A cluster tool for processing substrates, comprising: a first substrate processing chamber; a second substrate processing chamber, wherein the second substrate processing chamber is positioned at a first vertical distance from the first substrate processing chamber; a third substrate processing chamber; a fourth substrate processing chamber, wherein the fourth substrate processing chamber is positioned at a second vertical distance from the third substrate processing chamber; a first robot assembly having a first robot blade and a second robot blade, wherein the first robot blade is adapted to receive a substrate from the first substrate processing chamber and the second robot blade is adapted to receive a second substrate from the second substrate processing chamber generally simultaneously, and then deposit the first substrate in the third substrate processing chamber and the second substrate in the fourth substrate processing chamber generally simultaneously; and a second robot assembly having a first robot blade and a second robot blade, wherein the first robot blade is adapted to receive a substrate from the first substrate processing chamber and the second robot blade is adapted to receive a second substrate from the second substrate processing chamber generally simultaneously, and then deposit the first substrate in the third substrate processing chamber and the second substrate in the fourth substrate processing chamber generally simultaneously.