Patent ID: 6653054
Filing Date: 2003-11-25
Classification: G03F

Abstract:
A semiconductor substrate etching masking layer comprising an upper layer and a lower layer, wherein the upper layer comprises a material sensitive to wavelengths of light less than 100 nm and at least 10 nm, and wherein the upper layer material is resistant to wavelengths of light from 300 to 100 nm and/or wavelengths of light from 700 nm to 300 nm, and wherein the lower layer comprises a material resistant to wavelengths of light less than 100 nm and greater than 10 nm, and wherein the lower layer material is sensitive to wavelengths of light from 300 to 100 nm and/or wavelengths of light from 700 nm to 300 nm, and wherein the lower layer material is resistant to plasma etching when the lower layer has developed.