Patent ID: 8137048
Filing Date: 2012-03-20
Classification: B25J,H01L,Y10T

Abstract:
1. A robot assembly for transferring substrates, comprising: a central tube assembly oriented along a central axis and having an inner surface that forms part of a first enclosure at a first pressure, and an outer surface that forms part of a second enclosure at a second pressure, said second pressure being generally different from said first pressure, said central tube assembly supporting stator assemblies of first and second brushless motor assemblies within the first enclosure; a substrate transfer plane, perpendicular to the central axis of said central tube assembly; and a first transfer robot including: wherein a motor control system is configured for rotating the first rotor assembly and the second rotor assembly in the same direction and speed to produce a first axis motion for both the first and second rotor assemblies, and wherein the motor control system is configured for rotating the first rotor assembly and the second rotor assembly at different speeds and directions to produce a second axis motion for both the first and second rotor assemblies.