Patent ID: 6521939
Filing Date: 2003-02-18
Classification: H01L

Abstract:
A varactor device comprising:a bottom electrode comprising a plurality of diffusion junctions in a semiconductor substrate wherein said diffusion junctions are arranged in a two-dimensional array; a dielectric layer overlying said semiconductor substrate; a top electrode overlying said dielectric layer wherein said top electrode comprises a single polygon containing a two-dimensional array of openings therein that expose said diffusion junctions and a two-dimensional array of top electrode locations wherein said too electrode locations are surrounded by four said diffusion junctions; an interlevel dielectric layer overlying said top electrode and said diffusion junctions wherein said interlevel dielectric layer has a two-dimensional array of contact openings that expose underlying said diffusion junctions; and a patterned metal layer overlying said interlevel dielectric layer and contacting said diffusion junctions through said contact openings.