VARIABLE LOT SIZE LOAD PORT

摘要

A variable lot size load port assembly includes a tool interface, an advance plate, and a seal plate. The tool interface extends generally in a vertical dimension and has a front surface, a back surface generally parallel to the front surface, and an aperture. An advance plate is positioned to the front of the tool interface below the aperture. The advance plate extends generally horizontally and is configured to support a front opening unified pod (FOUP). The advance plate translates between a retracted position and an advanced position. The advanced position is proximate the tool interface and the retracted position is spaced from the tool interface. The seal plate has an upper end secured to the tool interface and a lower end covering a portion of the aperture to form a reduced aperture. The seal plate is shaped to form a proximity seal with a front flange of a FOUP of a selected capacity mounted to the advance plate and brought to the advanced position.