Patent ID: 6852605

Claim:
A method of forming a monolithic inductor, the steps comprising: forming a first dielectric layer on a semiconductor substrate having device components; forming first trenches in said first dielectric layer; forming first barrier material liner on said first trench walls; filling said first trenches with first metal and planarizing said first metal; forming a second dielectric layer over said first dielectric film having filled first trenches; forming first via-trench patterns in said second dielectric layer; filling said first via-trench patterns with second barrier material and planarizing said second barrier material; forming second trenches in said second dielectric layer between said second barrier material filled first via-trenches; filling said second trenches with second metal and planarizing said second metal; forming a third dielectric layer over said second dielectric film having second metal filled second trenches; forming second via-trench patterns in said third dielectric layer; filling said second via-trench patterns with third barrier material and planarizing said third barrier material; forming third trenches in said second dielectric layer between said third barrier metal filled second via-trenches; and filling said third trenches with third metal and planarizing said third metal.