Stacked Plate Capacitor Layout for Leakage and Breakdown Balance

The patent applies local quality by differentiating the treatment of corners: some corners are covered by adjacent plates while others are exposed. Specifically, first corners of the first conductive plate are covered by the second conductive plate, while second corners are exposed. This localized differentiation allows the structure to reduce current leakage at covered corners while maintaining TDDB and VBD performance at exposed corners, resolving the contradiction between these two performance metrics.

The patent segments the capacitor structure into multiple conductive plates (first, second, third, and fourth conductive plates) with alternating sizes and configurations. This segmentation allows each plate to be optimized independently for density while the collective structure maintains low current leakage through the selective corner coverage pattern, resolving the contradiction between device density and current leakage.

The patent employs asymmetry in the capacitor structure with alternating large and small conductive plates, where each plate has different dimensions and corner configurations. The first and third conductive plates have different sizes, and the second and fourth conductive plates have different sizes, creating an asymmetric pattern that optimizes performance while maintaining manufacturability through systematic variation rather than complex arbitrary designs.