Patent ID: 7914975

Claim:
A method of patterning a semiconductor substrate, the method comprising: creating a first set of patterned features in a first inorganic layer; creating a second set of patterned features in one of the first inorganic layer and a second inorganic layer; and transferring, into an organic underlayer, both the first and second sets of patterned features, wherein the first and second sets of patterned features are combined into a composite set of patterned features that are transferable into the substrate by using the organic underlayer as a mask; wherein the first inorganic layer comprises a silicon containing inorganic intermediate layer initially formed over the organic layer; the first set of patterned features is created by patterning the first inorganic intermediate layer using a first organic resist layer formed thereon; and wherein the second set of patterned features is formed by exposing and developing a first silicon containing resist layer formed over the first set of patterned features, the first silicon containing resist layer comprising the second inorganic layer.