Patent ID: 7053990
Filing Date: 2006-05-30
Classification: G03F

Abstract:
1. A multiple stage, multiple exposure lithography system, comprising: means for processing wafers; means for exchanging wafers; means for exchanging reticles; means for patterning wafers; and means for controlling the processing, exchanging, and patterning, wherein the means for processing wafers processes a first pair of wafers; wherein during a first time period the means for exchanging wafers exchanges the first pair of wafers to pattern each sequentially using a first reticle; wherein during a second time period the means for exchanging reticles exchanges the first reticle for a second reticle; wherein during a third time period the means for exchanging wafers exchanges the first pair of wafers to pattern each sequentially using the second reticle; wherein during a fourth time period the means for exchanging wafer exchanges the first pair of wafers for a second pair of wafers; wherein during a fifth time period the means for processing wafers processes the second pair of wafers; wherein during a sixth time period the means for exchanging wafers exchanges the second pair of wafers to pattern each sequentially using the second reticle; wherein during a seventh time period the means for exchanging reticles exchanges the first and second reticles; and wherein during an eighth time period the means for exchanging wafers exchanges the second pair of wafers to pattern each sequentially using the first reticle.