Patent ID: 6329118
Filing Date: 2001-12-11
Classification: G03F,H01L

Abstract:
A composition for reducing reflectivity of a substrate used to make an integrated circuit comprising:a base material selected from the group consisting of a spin-on-glass (SOG) material and a spin-on-polymer (SOP) material; anda light absorbing dye;wherein the composition has the following properties:it may be dry etched at substantially the same rate that a dielectric layer, upon which the composition may be deposited, is dry etched;it may be wet etched at a significantly faster rate than a dielectric layer, upon which the composition may be deposited, is wet etched;it may absorb light such that a substrate, upon which the composition and a photoresist layer are deposited, is rendered non-reflective when exposed to light having a wavelength used to expose the photoresist; andit may completely and uniformly fill a via that has been etched into a dielectric layer.