Patent ID: 6221727
Filing Date: 2001-04-24
Classification: H01L

Abstract:
A method of fabricating an inductor in the fabrication of an integrated circuit device comprising:forming a field oxide region in and on a semiconductor substrate;removing said field oxide region whereby a well is left in said semiconductor substrate;depositing a polish stop layer over said substrate and within said well;covering said polish stop layer and filling said well with a spin-on-glass layer;polishing back said spin-on-glass layer to said polish stop layer;depositing a first oxide layer overlying said spin-on-glass layer and said semiconductor substrate;patterning said first oxide layer using an inductor reticle whereby a plurality of openings are made through said first oxide layer to said spin-on-glass layer;removing all of said spin-on-glass layer within said well through said plurality of openings;thereafter depositing a second oxide layer overlying said first oxide layer and capping said plurality of openings thereby forming an air barrier within said well; anddepositing a metal layer overlying said second oxide layer and patterning said metal layer using same said inductor reticle to form said inductor in the fabrication of said integrated circuit.