Patent ID: 6352930
Filing Date: 2002-03-05
Classification: H01L,Y10T

Abstract:
A method for manufacturing an anti-reflective and etch-resistant structure for a reflective layer comprising:disposing an anti-reflective material on the reflective layer; disposing an etch-resistant material on the anti-reflective material, the etch resistant material being substantially transparent at a wavelength and thicker than the anti-reflective material whereby the reflectivity from the reflective layer at the actinic wavelength is reduced over the reflectivity from the reflective layer having the anti-reflective material alone; disposing a resist on the etch resistant material; exposing the resist in a pattern at the wavelength; and etching the etch-resistant material, and the anti-reflective material down to the reflective layer in all areas that are not protected by resist whereby the etch-resistant and anti-reflective materials remaining that had been protected by the resist form a hard mask on the reflective layer.