Patent ID: 6617087
Filing Date: 2003-09-09
Classification: G01N,G03F

Abstract:
An integrated circuit device manufacturing process, comprising:coating a substrate with a resist; selecting a reticle from among a plurality of reticles, one or more of which comprises a correct reticle pattern for a current stage in the integrated circuit device manufacturing process, wherein each of the plurality of reticles comprise a reticle pattern and a grating pattern, and wherein each grating pattern uniquely corresponds to and identifies a respective reticle, and wherein the grating patterns are adapted to facilitate identification of the corresponding reticle through scatterometry measurements of gratings formed in the resist from the reticle grating pattern; selectively exposing the resist to actinic radiation through the selected reticle; developing the resist to obtain a patterned resist having a reticle pattern portion and a grating pattern portion associated therewith; obtaining scatterometry data relating to the grating pattern portion of the patterned resist; determining from the scatterometry data whether the selected reticle comprises the correct reticle of the plurality of reticles for the current stage in the integrated circuit device manufacturing process.