Patent ID: 7891932
Filing Date: 2011-02-22
Classification: F16C,H01L,Y10S

Abstract:
1. A straight conveying device for vacuum comprising: a working rod with a tip end extending into a vacuum process chamber and movable in the axial direction, two static-pressure gas bearings supporting the rod in a non-contact manner through an air layer, an internal moving body of a magnet coupling type driving mechanism driving the working rod, said working rod, said bearings and said internal moving body being housed in the interior of a rod housing cylindrical portion which is in fluid communication with the vacuum process chamber and fluidically isolated from an external environment, and an exhaust portion having suction and provided at a part of the rod housing cylindrical portion, wherein the driving mechanism has an external moving body driven by driving means and moved in the axial direction outside the rod housing cylindrical portion and the internal moving body connected to the conveying rod to be magnetically coupled to the external moving body and moved following the external moving body by transmission of a driving force of the external moving body in the non-contact manner, and wherein the exhaust portion is provided at a position between the vacuum process chamber and the static-pressure gas bearings so that a pressure in the rod housing cylindrical portion is lowered by an exhaust of the exhaust portion relative to the pressure of the vacuum process chamber.