Patent ID: 7989357

Claim:
A method for patterning a semiconductor structure comprising: bonding a monocrystalline layer to a protective layer disposed on the semiconductor structure, wherein the monocrystalline layer is formed from crystalline silicon of a single crystalline orientation and the protective layer is selected from a group consisting of non-crystalline and polycrystalline materials; lithographically patterning the monocrystalline layer to form a hard mask; applying crystallographic etching to enhance the patterned hard mask; etching the protective layer according to the enhanced patterned hard mask; removing the enhanced patterned hard mask; filling the etched protective layer with an oxide layer; and removing any remaining material of the protective layer, wherein the protective layer is selected from a group consisting of: silicon nitride (Si 3 N 4 ), doped oxide, silicon-germanium (SiGe), borosilicate glass (BSG), borophosphosilicate glass (BPSG), and a combination thereof.