Patent ID: 6329124
Filing Date: 2001-12-11
Classification: H01L

Abstract:
A method of forming closely spaced features from a polysilicon layer, comprising the steps of:using a semiconductor structure including: the polysilicon layer, an anti-reflective coating (ARC) layer over the polysilicon layer, wherein a smallest dimension of at least one exposed portion of the polysilicon layer equals d.sub.1 ;forming a nitride layer to conform to an exposed surface of the semiconductor structure, wherein the nitride layer is formed to have a minimum thickness of .gamma.; andetching the nitride layer so as to leave nitride portions along sidewalls of the ARC layer, the nitride portions reducing the smallest dimension of the at least one exposed portion of the polysilicon layer to d.sub.2, wherein the dimension d.sub.2 is predetermined according to the relationship d.sub.2 =d.sub.1 -2.gamma..