Patent ID: 7268853
Filing Date: 2007-09-11
Classification: G03F,H01L

Abstract:
1. A system for photolithography comprising; an exposure chamber providing an isolated environment; an exposure stage in the isolated environment of the exposure chamber, the exposure stage being configured to receive a wafer having photoresist thereon to be exposed; a radiation source configured to provide radiation to the wafer being exposed; an interface chamber outside the isolated environment of the exposure chamber; a port allowing wafer transport between the isolated environment of the exposure chamber and the interface chamber; a post exposure bake heater in the interface chamber, the post exposure bake heater being configured to bake the wafer after exposure; and a wafer handler configured to remove the wafer having photoresist thereon from a cassette holding a plurality of wafers having photoresist thereon, to move the wafer having photoresist thereon through the port to the isolated environment of the exposure chamber before exposure, to remove the wafer through the port from the isolated environment of the exposure chamber after exposure, to move the wafer to the post exposure bake heater after removing the wafer from the exposure chamber, and to move the wafer to the cassette or a different cassette after baking the wafer without developing the photoresist on the wafer.