Patent ID: 6066574
Filing Date: 2000-05-23
Classification: H01L

Abstract:
A method of forming a layer of low dielectric constant material on a surface of a substrate, the method comprising the steps of:(a) applying a layer of a fluid coating material comprising a benzocyclobutene (BCB) or a derivative thereof and a solvent or dispersant therefor to a substrate by a spin coating process, thereby forming a coated substrate;(b) baking the coated substrate at a first temperature and for a first time interval sufficient to remove said solvent or dispersant from the coating material;(c) curing the baked coating material layer by heating at a second temperature, higher than said first temperature, and for a second time interval sufficient to convert the baked coating material layer to a low dielectric constant (""low k"") coating layer; and(d) subjecting said substrate with said low k coating layer thereon to a cool-down treatment at a third temperature, lower than said second temperature, and for a third time interval;wherein said steps (a)-(d) are performed consecutively and in the same apparatus.