Patent ID: 8921014

Claim:
A lithography mask comprising: a transparent substrate; and a multi-layered structure on the transparent substrate, the multi-layered structure having an opening therethrough, the multi-layered structure comprising: a first molybdenum silicon nitride (Mo x Si y N z ) layer having a first thickness, a percentage of molybdenum (x) of the first Mo x Si y N z layer being between 1 and 2 substantially uniformly throughout the first thickness, a percentage of silicon (y) of the first Mo x Si y N z layer being between 50 and 55 substantially uniformly throughout the first thickness, and a percentage of nitrogen (z) of the first Mo x Si y N z layer being between 40 and 50 substantially uniformly throughout the first thickness, the opening being through the first Mo x Si y N z layer; and a second molybdenum silicon nitride (Mo x Si y N z ) layer having a second thickness, a percentage of molybdenum (x) of the second Mo x Si y N z layer between 4 and 5 substantially uniformly throughout the second thickness, a percentage of silicon (y) of the second Mo x Si y N z layer being between 45 and 50 substantially uniformly throughout the second thickness, a percentage of nitrogen (z) of the second Mo x Si y N z layer being between 40 and 50 substantially uniformly throughout the second thickeness, the opening being the second Mo x Si y N z layer.