Patent ID: 6506645
Filing Date: 2003-01-14
Classification: H01L

Abstract:
A method of fabricating a capacitor in an integrated circuit that is designed to operate within a first range of applied voltages, the method comprising:forming a first electrode; introducing a fixed charged density within the first electrode; forming an insulating layer adjacent the first electrode; forming a second electrode adjacent the insulating layer such that the insulating layer is interposed between the first and second electrodes, wherein the first electrode develops a depletion region that results in the capacitor experiencing a drop-off in capacitance when operated within a second range of applied voltages; and wherein the fixed charged density modifies the capacitance v. voltage behavior of the capacitor when operated within the second range such that the second range of applied voltages is displaced with respect to the first range, thereby decreasing the variation in the capacitance of the capacitor when the capacitor is operated within the first range of applied voltages.