Patent ID: 6399284
Filing Date: 2002-06-04
Classification: H01L

Abstract:
A method of forming a sub-lithographic via, comprising:providing a substrate comprising a conductor having a width of about 0.25 &mgr;m or less over a portion of the substrate and an insulating film over the conductor and the substrate; etching a preliminary via in the insulating film over the conductor, the preliminary via defined by sidewalls in the insulating film; depositing a CVD layer over the substrate, the insulating film, and the conductor, the CVD layer having a vertical portion adjacent the sidewalls of the insulating film and a horizontal portion in areas not adjacent the sidewalls of the insulating film; and removing the horizontal portion of the CVD layer thereby forming the sub-lithographic via over the conductor, the sub-lithographic via having a width of less than about 0.25 &mgr;m.