Patent ID: 7700244
Filing Date: 2010-04-20
Classification: G03F,Y10T

Abstract:
1. A mask blank providing system comprising: substrate information storage means for storing first optical characteristic information of a mask blank transparent substrate with respect to an exposure wavelength in a manner correlated with the mask blank transparent substrate; mask blank information storage means for storing second optical characteristic information of a mask blank with respect to the exposure wavelength in a manner correlated with the mask blank, the second optical characteristic information being different from the first optical characteristic information; substrate information providing means for providing, to the mask blank manufacturing department and/or said mask manufacturing department, the first optical characteristic information of the mask blank transparent substrate stored in the substrate information storage means; and mask blank information providing means for providing, to the mask manufacturing department, the second optical characteristic information of the mask blank stored in the mask blank information storage means, wherein the first optical characteristic information of the mask blank transparent substrate includes variation in a substrate plane with respect to optical characteristic.