Patent ID: 7344972
Filing Date: 2008-03-18
Classification: H01L

Abstract:
1. A method, comprising: forming a first via dielectric layer on a substrate; patterning the first via dielectric layer to form a via through the first via dielectric layer; forming a photosensitive trench dielectric layer on the first via dielectric layer; patterning the photosensitive trench dielectric layer to form a trench through the photosensitive trench dielectric layer; depositing a conductive material in the via and the trench; forming a top layer on the photosensitive trench dielectric layer; and decomposing, at least partially, the photosensitive trench dielectric layer, decomposed material from the photosensitive trench dielectric layer passing through the top layer, wherein all the patterned first via dielectric layer remains in place after decomposing the photosensitive trench dielectric layer.