Patent ID: 7005248
Filing Date: 2006-02-28
Classification: H01L

Abstract:
1. A method of forming a cavity between multilayered wirings, comprising: coating the surface of a first dielectric film formed on a semiconductor substrate with a polyamic acid and/or a polyimide obtained from at least one alicyclic tetracarboxylic acid dianhydride represented by the following general formula (1) and at least one alicyclic diamine represented by the following general formula (2): wherein R wherein R patterning the polyamic acid and/or the polyimide as a cavity-forming polymer, embedding a metal in a pattern in the cavity-forming polymer to form a metallic wiring layer, forming a second dielectric film on the cavity-forming polymer containing the embedded metal, and removing the cavity-forming polymer present in the wiring layer by heating to form a cavity.