A trilayer
resist (TLR) patterning scheme is provided to enable gate conductors, particularly polySi gate conductors, with critical dimensions (CDs) of less than 40 nm and minimal LER and LWR. In accordance with the present invention, the inventive patterning scheme utilizes an organic / inorganic / organic multilayer stack instead of an
organic layer used in the prior art. The top
organic layer of the inventive TLR is a
photoresist material such as a 193 nm
photoresist that is located atop an antireflective
coating (ARC), which is also comprised of an organic material. The middle
inorganic layer of the TLR comprises any
oxide layer such as, for example, a low temperature (less than or equal to 250° C.) chemical vapor deposited (CVD)
oxide, an
oxide derived from TEOS (tetraethylorthosilicate),
silicon oxide, a
silane oxide, or a Si-containing ARC material. The bottom
organic layer of the TLR comprises any organic layer such as, for example, a Near Frictionless Carbon (NFC),
a diamond-like carbon, a thermosetting polyarylene
ether.